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GTX LTR ® / Privacy Plus ® 900 MHz Mobile Radio Service Manual 6880906Z19-O

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GTXLTR® / Privacy Plus ®

900 MHzMobile Radio

Service Manual

6880906Z19-O

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Product Software License AgreementTHIS LICENSE AGREEMENT BETWEEN YOU, THE USER, AND MOTOROLA, APPLIES TO THE SOFTWAREEMBEDDED IN OR DELIVERED WITH THE ACCOMPANYING MOTOROLA PRODUCT (“SOFTWARE”),AND IS APPLICABLE UNLESS A SIGNED LICENSE AGREEMENT COVERING ITS SUBJECT MATTER HASBEEN EXECUTED BETWEEN YOU AND MOTOROLA. BY USING THE PRODUCT, YOU ACKNOWLEDGETHAT THIS AGREEMENT HAS BEEN READ AND UNDERSTOOD AND THAT YOU AGREE TO BE BOUNDBY ITS TERMS AND CONDITIONS. IF YOU DO NOT AGREE, YOU ARE NOT LICENSED TO USE THE PROD-UCT, AND IF YOU ARE THE PURCHASER OF THE PRODUCT, YOU SHOULD IMMEDIATELY RETURN THEPRODUCT IN ITS ENTIRETY TO ITS PLACE OF PURCHASE FOR A REFUND.

Motorola grants to You a non-exclusive license to use the SOFTWARE in the manner described in the documenta-tion associated with the product. Motorola retains ownership of the SOFTWARE including all patent, copyrights,and other intellectual property rights. You may transfer this license to use the SOFTWARE as long as the transfereeagrees to be bound by the terms of this Agreement.

You agree not to reverse engineer or create derivative works of the SOFTWARE; not to transmit the SOFTWAREelectronically; not to modify, configure, or use the SOFTWARE in any manner not authorized by MOTOROLA;and, except as an integral part of the product, not to rent, lease, or convey the SOFTWARE.

MOTOROLA SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING FROMTHE USE OF THIS SOFTWARE.

With respect to the U.S. Government, if acquired under FAR policy (52.227-19), the SOFTWARE is provided withRestricted Rights, and if acquired under DFARS policy (227.7202), then the SOFTWARE is provided only with thecommercial rights of this Agreement.

This license is effective until terminated. It will terminate immediately and automatically if You fail to comply withany term of this Agreement.

You agree that this is the complete and exclusive statement of the agreement between You and Motorola and thatany modification of these terms shall be made only by mutual agreement and evidenced by written amendmentsigned by both parties. This Agreement shall be governed and interpreted by the laws of the State of Illinois,United States of America.

Computer Software CopyrightsThis manual may not be reproduced, in whole or in part, in any form whatsoever, without the express written permis-sion of Motorola, Inc.

The Motorola products described in this manual contain one or more computer programs. These computer pro-grams are protected by copyright law and international treaties. Unauthorized reproduction or distribution ofthese programs, or any part thereof, may result in severe civil and criminal penalties, and will be prosecuted to themaximum extent possible under the law. U.S. and international patents pending.

, MOTOROLA, and PRIVACY PLUS are registered trademarks of Motorola, Inc.GTX is a trademark of Motorola, Inc.LTR is a registered trademark of E.F. Johnson Company.TORX is a registered trademark of Camcar/Textron.

© 2000 by Motorola, Inc. All Rights Reserved.

This product is covered by one or more issued U.S. Patents. Other Patent applications pending.

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September, 2000 6880906Z19-O i

Table of Contents

ForewordScope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viHow to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viTechnical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viService Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viOrdering Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viModel Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viiAccessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ixMaintenance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xRadio Model Numbering System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xii

Section 1Introduction

Notational Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Warning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Scope of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Air Bag Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Vehicles Equipped with Air Bags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2LP Gas Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Section 2Basic Maintenance

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Plastic Surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Circuit Boards and Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Safe Handling of CMOS Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Repair Procedures and Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Rigid Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Chip Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Chip Component Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3Chip Component Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Over-Molded Pad-Array Carrier (OMPAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3OMPAC Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3OMPAC Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Shields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3Shield Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3Shield Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Replacement of Transistor Q6505 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

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Removing Faulty Transistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Preparing Main Board for New Transistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Positioning New Transistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Soldering Transistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Installing Flange Capacitors C6567 and C6568. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Reassembly of Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Section 3Test Equipment, Service Aids, and Tools

Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Field Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Section 4Test Mode, Error Codes and Performance Tests

Front Panel Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Test Mode/Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Test Mode/Channel Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Test Mode/Tx Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Fail Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2Exiting Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Section 5Disassembly & Reassembly For 12 W Models

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Disassemble the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Remove the Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Remove the Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Remove the Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2Disassemble the Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Assemble the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Assemble the Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Replace the Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Replace the Top Cover and Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Section 6Disassembly & Reassembly For 30 W Models

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Disassemble the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Remove the Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Remove the Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Remove the Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2Disassemble the Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Assemble the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2Assemble the Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2Replace the Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3Replace the Top Cover and Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

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Section 7Radio Tuning Procedure

Radio Tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1Service Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Starting the Tuning Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Alignment Default Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Tx Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Reference Oscillator Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Transmitter Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Transmit Current Limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3Transmit Deviation Balance (Compensation) & Deviation Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3Transmit Deviation Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3Ending the Tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Section 8Theory of Operation

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Receiver Detailed Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2Transmitter Detailed Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

12 Watt PA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-330 Watt PA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3Power Control Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Power Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4Thermal Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Synthesizer Detailed Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4Controller Detailed Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6Voltage Regulators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6Electronic On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6Mechanical On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7Hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7Microprocessor Clock Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7SBEP Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7Microprocessor (Open Controller) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7One-Time Programmable (Flash) Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8Electrically Erasable Programmable Memory (EEPROM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8Static Random Access Memory (SRAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Controller Audio & Signaling Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Audio Signalling Filter IC (ASFIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9Audio Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Transmit Audio Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10Mic Input Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10Flat Tx Audio Input Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10PTT Sensing and TX Audio Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

Transmit Signalling Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10Sub-audible Data (PL/DPL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11High Speed Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11Dual Tone Multiple Frequency (DTMF) Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11

Receive Audio Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12

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Table of Contents GTX LTR / Privacy Plus 900 MHz Mobile Radio Service Manual

Audio Processing and Digital Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13Audio Amplification Speaker (+) Speaker (-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13Handset Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13External Rx Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14

Receive Signalling Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14Sub-audible Data (PL/DPL) and High Speed Data Decoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14Alert Tone Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15Hear Clear IC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15Transmit Path for Radios with Hear Clear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15Receive Path for Radios with Hear Clear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15Hear Clear Routing of Data/Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16

Accessory Connector Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16Remote Desk Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16Public Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17External Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17RSSI Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

Section 9Troubleshooting

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1Troubleshooting Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1Troubleshooting Flow Chart for Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2Troubleshooting Flow Chart for Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4Troubleshooting Flow Chart for 12 W Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6Troubleshooting Flow Chart for 30 W Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7Troubleshooting Flow Chart for Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8Troubleshooting Flow Chart for Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9

Schematic Diagrams, Circuit Board Details, and Parts ListsSchematic Diagram for HLF9003A, HLF9004A, HLF9009A & HLF9010A Main Boards,

Radio Block Diagram Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Schematic Diagram for HLF9003A, HLF9004A, HLF9009A & HLF9010A Main Boards,Receiver Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Schematic Diagram for HLF9003A, HLF9004A, HLF9009A & HLF9010A Main Boards,Synthesizer Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Schematic Diagram for HLF9003A & HLF9004A Main Boards, Power Amplifier Section . . . . . . . . . . . . . . . . . .4

Schematic Diagram for HLF9003A & HLF9004A Main Boards, Power Control Section . . . . . . . . . . . . . . . . . . . .5

Schematic Diagram for HLF9009A & HLF9010A Main Boards, Power Amplifier Section . . . . . . . . . . . . . . . . . .6

Schematic Diagram for HLF9009A & HLF9010A Main Boards, Power Control Section . . . . . . . . . . . . . . . . . . . .7

Schematic Diagram for HLF9003A, HLF9004A, HLF9009A & HLF9010A Main Boards,Controller Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Schematic Diagram for HLF9003A, HLF9004A, HLF9009A & HLF9010A Main Boards,Audio & Digital Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Schematic Diagram for HLF9003, HLF9004A, HLF9009A & HLF9010A Main Board,Audio PA & I/O Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Schematic Diagram for HLF9003A, HLF9004A, HLF9009A & HLF9010A Main Boards,Supply Voltage Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Schematic Diagram for HLF9003, HLF9004A, HLF9009A & HLF9010A Main Board,Hear Clear Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Circuit Board Details for HLF9003A & HLF9004A Main Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Parts List for HLF9003A & HLF9004A Main Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Circuit Board Details for HLF9009A & HLF9010A Main Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Parts List for HLF9009A & HLF9010A Main Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

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GTX LTR / Privacy Plus 900 MHz Mobile Radio Service Manual Table of Contents

Schematic Diagram for FLN8744A Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Circuit Board Details & Parts List for FLN8744A Control Head. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

GTX Exploded View & Mechanical Parts List, 30 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

GTX Exploded View & Mechanical Parts List, 12 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

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Foreword GTX LTR / Privacy Plus 900 MHz Mobile Service Manual

Scope of Manual

Scope of Manual

This manual is intended for use by experienced techni-cians familiar with similar types of equipment. It con-tains all service information required for theequipment described and is current as of the printingdate. Changes which occur after the printing date areincorporated by service manual revisions. These revi-sions are added to the manuals as the engineeringchanges are incorporated into the equipment.

How to Use This Manual

This manual contains introductory material such asmodel charts, accessories, and specifications, as well asfour sections that deal with specific service aspects ofthe GTX Mobile Radio. Refer to the Table of Contentsfor a general overview of the manual, or to the “Over-view” paragraph in each section for a specific overviewof the information in that section.

Technical Support

To obtain technical support, you may call Motorola’sRadius Product Services. When you call, we ask thatyou have ready the model and serial numbers of therespective radio or its parts.

Service Policy

If malfunctions occur within 30 days that cannot beresolved over the phone with Product Services, adefective major component should be returned. Youmust obtain authorization from Radius Product Ser-vices before returning the component.

Ordering Replacement Parts

You can order additional components and some pieceparts directly through your Radius price pages. Whenordering replacement parts, include the complete iden-tification number for all chassis, kits, and components.If you do not know a part number, include with your

order the number of the chassis or kit which containsthe part, and a detailed description of the desired com-ponent. If a Motorola part number is identified on aparts list, you should be able to order the part throughMotorola Parts. If only a generic part is listed, the partis not normally available through Motorola. If no partslist is shown, generally, no user serviceable parts areavailable for the kit.

Radius 30-Day WarrantyTechnical SupportRadius Product Services8000 W. Sunrise Blvd.Plantation, FL 33322

Motorola Radio Support CenterAttention: Warranty Return3761 South Central AvenueRockford, IL 61102 USA1-800-227-6772 (U.S. & Canada)

Radius Major Component RepairMotorola Radio Support Center3760 South Central AvenueRockford, IL 61102 USA

Motorola PartsWorldwide System andAftermarket Products DivisionAttention: Order Processing1313 E. Algonquin RoadSchaumburg, IL 60196

Worldwide System andAftermarket Products DivisionAttention: International Order Processing1313 E. Algonquin RoadSchaumburg, IL 60196

Customer Service1-800-422-42101-847-538-8198 (FAX)

Parts Identification1-847-538-00211-847-538-8194 (FAX)

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September, 2000 6880906Z19-O vii

GTX LTR / Privacy Plus 900 MHz Mobile Service Manual Foreword

Model Chart

Model Chart

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Item DescriptionX HUF3029_ Radio, Privacy Plus, 12.5 kHz, 12 W X

X HUF3031_ Radio, LTR, 12.5 kHz, 12 W XX HUF3030_ Unified Chassis, Privacy Plus, 12.5 kHz, 12 W X

X HUF3032_ Unified Chassis, LTR, 12.5 kHz, 12 W XX X HCN3018_ Control Head XX X HMN3413_ Compact MicrophoneX X GLN7317_ TrunnionX X GKN6270_ Power CableX X 6880907Z66 Installation ManualX X 6880907Z20 GTX LTR User’s Guide (English/French)X X 6880907Z19 GTX Privacy Plus User’s Guide (English/French)

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viii 6880906Z19-O September, 2000

Foreword GTX LTR / Privacy Plus 900 MHz Mobile Service Manual

Model Chart

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9004

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Item DescriptionX HUF3007_ Radio, Privacy Plus, 12.5 kHz, 30 W X

X HUF3011_ Radio, LTR, 12.5 kHz, 30 W XX HUF3009_ Unified Chassis, Privacy Plus, 12.5 kHz, 30 W X

X HUF3013_ Unified Chassis, LTR, 12.5 kHz, 30 W XX X FCN3018 Control Head XX X HMN3413_ Compact MicrophoneX X HLN9640_ TrunnionX X HKN4191_ Power CableX X 6880907Z66 Installation ManualX X 6880907Z20 GTX LTR User’s Guide (English/French)X X 6880907Z19 GTX Privacy Plus User’s Guide (English/French)

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GTX LTR / Privacy Plus 900 MHz Mobile Service Manual Foreword

Accessories

Accessories

Audio

HMN3413 Compact Microphone

HMN1035_R Heavy Duty Palm Microphone

HMN3013 DTMF Non-Backlit Microphone with Hang-Up Clip

AAREX4617 Handset with Hang-up Clip

HLN9073 Hang-up Clip

Speaker

FSN5510 7.5 W External Speaker

Installation

HLN9640 Trunnion Kit; 30 W

GLN7317 Trunnion Kit; 12 W

Cables

HKN4191 Power Cable; 30 W

GKN7270 Power Cable; 12 W

GKN6271 Ignition Sense Cable

GKN6272 External Alarm Relay and Cable

Antennas

RRA4935 900 MHz, 3 dB Gain w/14 ft. Cable

Control Station

RLN4834 Control Station Package; 30 W

HLN3067 Control Station Package; 12 W

GLN7318 Base Station Tray

HPN4001 Power Supply and Cable (greater than 25 W)

HPN4002 Power Supply and Cable (less than or equal to 25 W)

HKN9088 Mobile Mini-U Antenna Adapter

HMN3000 Desk Micophone

Manuals/Kits

6880907Z20 GTX LTR User’s Guide (English/French)

6880907Z19 GTX Privacy Plus User’s Guide (English/French)

6880907Z66 Installation Manual

RVN4150 GTX Radio Service Software Kit

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x 6880906Z19-O September, 2000

Foreword GTX LTR / Privacy Plus 900 MHz Mobile Service Manual

Maintenance Specifications

Maintenance Specifications

GENERAL

TRANSMITTER

RECEIVER

Frequency: 900 MHz

Model Number: M11WRD4CB1_N, M11WRD4CU1_N M11WGD4CB1_N, M11WGD4CU1_N

RF Output: 30 W 12 W

RF Output (Talkaround): 20 W 10 W

FCC Description: ABZ99FT3004 AZ492FT5782

Dimensions (H x W x L): 1.73” x 6.61” x 8.62”(44mm x 168mm x 219mm)

1.73” x 6.61” x 6.67””(44mm x 168mm x 169mm)

Weight: 4.30 lb(1.95 kg)

2.67 lb(1.21 kg)

Frequency Range *:TransmitTalkaroundReceive

896 – 941 MHz896 – 902 MHz935 – 941 MHz935 – 941 MHz

Channel Spacing: 12.5 kHz

Channel Capacity: 10 Trunked Modes / 10 Conventional Channels

Group Capacity: 8 Trunked Talkgroups

Frequency Stability: 1.5 ppm

Input Voltage: 13.6 V dc 13.8 V dc

Temperature Range:OperatingStorage

-30 to +60°C-40 to +85°C

Tx Current: 12.0A (30 W) 6.0A (12 W)

* 821 - 825 MHz & 866 - 870 MHz is available outside of the U.S.

Power Output: 30 W (896 – 902 MHz)20 W (935 – 941 MHz)

12 W (896 – 902 MHz)10 W (835 – 941 MHz)

Channel Spacing: 12.5 kHz

Maximum Frequency Separation: 6 MHz

Modulation Limiting: 2.5 kHz

FM Hum & Noise: -35 dB

Conducted / Radiated Emission: -13 dBm

Audio Response (300-3000 Hz): +1 to -3 dB

Audio Distortion: Less than 5%

Channel Spacing: 12.5 kHz

Sensitivity (12dB SINAD): 0.35µV

Intermodulation: -65 dB

Adjacent Channel Selectivity: -65 dB

Spurious Rejection: -65 dB

Audio Output Power: 4W (internal speaker)7.5W (external speaker)

Audio Distortion @ Rated Audio: 5%

Current Drain:OFFStandbyRated

30 mA450 mA

1.5A (4W internal speaker)1.7A (7.5W external speaker)

Conducted Spurious Emission: Per FCC part 90

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September, 2000 6880906Z19-O xi

GTX LTR / Privacy Plus 900 MHz Mobile Service Manual Foreword

Maintenance Specifications

MIL STANDARDS- THE GTX MOBILE RADIO IS DESIGNED TO MEET OR EXCEED MOST REQUIREMENTSFOR MIL STD 810 C, D, AND E

All specifications subject to change without notice.

Applicable MIL-STD:

810C 810D 810E

Methods Procedures Methods Procedures Methods ProceduresLow Pressure 500.1 1 500.2 1 500.3 1

High Temperature 501.1 1,2 501.2 1,2 501.3 1,2

Low Temperature 502.1 1 502.2 1,2 502.3 1,2

Temperature Shock 503.1 1 503.2 1 503.3 1

Rain 506.1 2 506.2 2 506.3 2

Humidity 507.1 2 507.2 2 507.3 2

Salt Fog 509.1 1 509.2 1 509.3 1

Dust 510.1 1 510.2 1 510.3 1

Vibration 514.2 8,10 514.3 1 514.4 1

Shock 516.2 1,3,5 516.3 1,5 516.4 1,5

Crash Safety Shock 516.4 5

Packaged Vibration 514.4

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xii 6880906Z19-O September, 2000

Foreword GTX LTR / Privacy Plus 900 MHz Mobile Service Manual

Radio Model Numbering System

Radio Model Numbering System

The model number, serial number, and Motorola FCC designation number are all on a label attached to the back ofyour radio.

All GTX LTR and Privacy Plus radio models are synthesized, 8 trunked mode, 10-conventional channel units thatcome standard with Tone Private-Line (TPL)/Digital Private-Line (DPL) coded squelch or carrier squelch, whichmay be enabled/disabled on a per channel basis. Programming changes can be made by your local dealer.

M 1 1 W R D 4 C B 1 A N

Position 1 - Type of UnitM = Mobile

Model Number:

Position: 1 2 3 4 5 6 7 8 9 10 11 12

Position 4 - Frequency Band

Position 2 & 3 - Model Series

Position 5 - Power Level

Position 6 - Physical Package

Position 12 -

Position 10 - Feature Level

Position 8 - Primary Operation

Position 11- Version

Position 9 - Primary System Type

896-941 MHz

30 W

Standard Control with Display

Position 7 - Channel Spacing12.5 kHz

Unique Model Variations

Standard Package

Version Letter (Alpha) - Major Change

Basic

Privacy Plus®

Trunked Twin Type

GTX Privacy Plus

M 1 1 W R D 4 C U 1 A N

Position 1 - Type of UnitM = Mobile

Model Number:

Position: 1 2 3 4 5 6 7 8 9 10 11 12

Position 4 - Frequency Band

Position 2 & 3 - Model Series

Position 5 - Power Level

Position 6 - Physical Package

Position 12 -

Position 10 - Feature Level

Position 8 - Primary Operation

Position 11- Version

Position 9 - LTR

896-941 MHz

30 W

Standard Control with Display

Position 7 - Channel Spacing12.5 kHz

Unique Model Variations

Standard Package

Version Letter (Alpha) - Major Change

Basic

Trunked Twin Type

GTX LTR

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GTX LTR / Privacy Plus 900 MHz Mobile Service Manual Foreword

Radio Model Numbering System

M 1 1 W G D 4 C B 1 A N

Position 1 - Type of UnitM = Mobile

Model Number:

Position: 1 2 3 4 5 6 7 8 9 10 11 12

Position 4 - Frequency Band

Position 2 & 3 - Model Series

Position 5 - Power Level

Position 6 - Physical Package

Position 12 -

Position 10 - Feature Level

Position 8 - Primary Operation

Position 11- Version

Position 9 - Primary System Type

896-941 MHz

12 W

Standard Control with Display

Position 7 - Channel Spacing12.5 kHz

Unique Model Variations

Standard Package

Version Letter (Alpha) - Major Change

Basic

Privacy Plus®

Trunked Twin Type

GTX Privacy Plus

M 1 1 W G D 4 C U 1 A N

Position 1 - Type of UnitM = Mobile

Model Number:

Position: 1 2 3 4 5 6 7 8 9 10 11 12

Position 4 - Frequency Band

Position 2 & 3 - Model Series

Position 5 - Power Level

Position 6 - Physical Package

Position 12 -

Position 10 - Feature Level

Position 8 - Primary Operation

Position 11- Version

Position 9 - LTR

896-941 MHz

12 W

Standard Control with Display

Position 7 - Channel Spacing12.5 kHz

Unique Model Variations

Standard Package

Version Letter (Alpha) - Major Change

Basic

Trunked Twin Type

GTX LTR

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xiv 6880906Z19-O September, 2000

Foreword GTX LTR / Privacy Plus 900 MHz Mobile Service Manual

Radio Model Numbering System

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September, 2000 6880906Z19-O 1-1

Section 1Introduction

Notational Conventions

Throughout the text in this publication, you will noticethe use of warnings, cautions, and notes. These nota-tions are used to emphasize that safety hazards exist,and care must be taken and observed.

Warning

WARNING

Indicates a potentially hazardous situa-tion which, if not avoided, COULD resultin death or serious injury.

Caution

CAUTIONIndicates a potentially hazardous situa-tion which, if not avoided, MAY resultin minor or moderate injury. CAUTIONmay also be used to alert against unsafepractices and property-damage-onlyaccident hazards.

Note

NOTEAn operational procedure, practice, orcondition, etc., which it is essential toemphasize.

Scope of this Manual

This manual includes model/kit information, specifi-cations, disassembly/reassembly procedures, mainte-nance, alignment, troubleshooting, and all theory,schematic diagrams, printed circuit board details andparts lists for all parts in the equipment described.

CAUTIONThis manual is intended for use by expe-rienced technicians who are familiarwith similar types of equipment.

Safety information

Every radio, when transmitting, radiates energy intothe atmosphere which may, under certain conditions,causes the generation of a spark.

All users of vehicles fitted with radios should be awareof the following warnings:

WARNING

• Do not operate the radio near flamma-ble liquids or in the vicinity of explo-sive devices.

• During normal use, the radio will sub-ject you to radio energy substantiallybelow the level where any kind ofharm is reported.

To ensure personal safety, please observe the followingsimple rules:

WARNING

• Do not transmit when the antenna isvery close to, or touching, exposedparts of the body, especially the faceand eyes.

• Do not hold the transmit (PTT) key inwhen not desiring to transmit.

• Check the laws and regulations on theuse of two-way mobile radios in theareas where you drive. Always obeythem. Also, when using your radiowhile driving, please:

give full attention to driving,

use hands-free operation, if available,and

pull off the road and park before mak-ing or answering a call if driving con-ditions so require.

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1-2 6880906Z19-O September, 2000

Introduction GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Air Bag Warning

Air Bag Warning

Vehicles Equipped with Air Bags

WARNING

An air bag inflates with great force. Donot place objects, including communica-tion equipment, in the area over the airbag or in the air bag deployment area. Ifthe communicat ion equipment isimproperly installed and the air baginflates, this could cause serious injury.

Installation of vehicle equipment should be performedby a professional installer/technician qualified in therequirements for such installations.

An air bag’s size, shape and deployment area can varyby vehicle make, model and front compartment config-uration (e.g., bench seat vs. bucket seats). Contact thevehicle manufacturer’s corporate headquarters, if nec-essary, for specific air bag information for the vehiclemake, model and front compartment configuration

involved in your communication equipment installa-tion.

LP Gas Warning

WARNING

It is mandatory that radios installed invehicles fueled by liquefied petroleumgas conform to the National Fire Protec-tion Association standard NFPA 58,which applies to vehicles with a liquidpropane (LP) gas container in the trunkor other sealed off space within the inte-rior of the vehicle. The NFPA 58 requiresthe following:

• Any space containing radio equip-ment shall be isolated by a seal fromthe space in which the LP gas con-tainer and its fittings are located.

• Removable (outside) filling connec-tions shall be used.

• The container space shall be vented tothe outside.

Page 19: Engineering Gtx

September, 2000 6880906Z19-O 2-1

Section 2Basic Maintenance

Introduction

This section of the manual describes preventive main-tenance, safe handling of CMOS devices, and repairprocedures and techniques. Each of these topics pro-vides information vital to the successful operation andmaintenance of your radio.

Preventive Maintenance

The radios do not require a scheduled preventivemaintenance program; however, periodic visualinspection and cleaning is recommended.

Inspection

Check that the external surfaces of the radios are clean,and that all external controls and switches are func-tional. A detailed inspection of the interior electroniccircuitry is not needed or desired.

Cleaning

CAUTIONThe effects of certain chemical and theirvapors can have harmful results on cer-tain plastics. Aerosol sprays, tunercleaners, and other chemicals should beavoided.

The following procedures describe the recommendedcleaning agents and the methods to be used whencleaning the external and internal surfaces of the radio.External surfaces include the front cover, housing andassembly. These surfaces should be cleaned whenevera visual inspection reveals the presence of smudges,grease, and/or grime. Internal surfaces should becleaned only when the radio is disassembled for servic-ing or repair.

The only recommended agent for cleaning the externalradio surfaces is a 0.5%solution of mild dishwashingdetergent in water. the only factory recommended liq-uid for cleaning the printed circuits boards and theircomponents is isopropyl alcohol (70% by volume).

Plastic Surfaces

The detergent solution should be applied sparinglywith a stiff non-metallic, short-bristled brush to workall loose dirt away from the radio. A soft, absorbent,

lint-free cloth or tissue should be used to remove thesolution and dry the radio. Make sure that no waterremains entrapped near the connectors, cracks, or crev-ices.

Circuit Boards and Components

Isopropyl alcohol may be applied with a stiff, non-metallic, short-bristled brush to dislodge embedded orcaked material located in hard-to-reach areas. Thebrush stroke should direct the dislodged material outand away from the inside of the radio.

CAUTIONAlcohol is a high-wetting liquid and cancarry contamination into unwantedplaces if an excessive quantity is used.

Make sure that controls or tunable components are notsoaked with the liquid. Do not use high-pressure air tohasten the drying process. This could cause the liquidto puddle and collect in unwanted places. Upon com-pletion of the cleaning process, use a soft, absorbent,lint-free cloth to dry the area. Do not brush or applyany isopropyl alcohol to the frame, front cover, or backcover.

NOTEAlways use a fresh supply of isopropylalcohol and a clean container to preventcontamination by dissolved materialfrom previous usage.

Safe Handling of CMOS DevicesComplementary metal-oxide semiconductor (CMOS)devices are used in this family of radios. While theattributes of CMOS are many, their characteristicsmake them susceptible to damage by electrostatic orhigh voltage charges. Damage can be latent, resultingin failures occurring weeks or months later. Therefore,special precautions must be taken to prevent devicedamage during disassembly, troubleshooting, andrepair. Handling precautions are mandatory for CMOScircuits and are especially important in low humidityconditions.

CAUTIONDo not attempt to disassemble the radiowithout observing the following han-dling precautions.

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Basic Maintenance GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Repair Procedures and Techniques

Precautions

1. Eliminate static generators (plastics, stryo-foam, etc. in the work area.

2. Remove nylon or double-knit polyester jack-ets, roll up long sleeves, and remove or tieback loose hanging neckties.

3. Store and transport all static-sensitive devicesin ESD-protective containers.

4. If at all possible, handle CMOS devices by thepackage and not by the leads. Prior to touch-ing the unit, touch an electrical ground toremove any static charge that you may haveaccumulated. The package and substrate maybe electrically common. If so, the reaction of adischarge to the case would cause the samedame as touching the leads.

5. Disconnect all power from the unit beforeESD-sensitive components are removed orinserted unless otherwise noted.

6. Use a static safeguarded workstation, whichcan be accomplished through the use of ananti-static kit (Motorola part number0180386A82). This kit includes a writ strap,two ground cords, a static-control table matand a static-control floor mat. For additionalinformation, refer to Service and Repair NoteSRN F1052, “Static Control Equipment forServicing ESD Sensitive Products”, availableform Motorola Literature Distribution 2290Hammond Drive Schaumburg, IL 60173 (847)576-2826.

When these items are not readily available,observing the following techniques will mini-mize chance of damage.

• If a static-sensitive device is to be temporarilyset down, use a conductive surface for place-ment of the device.

• Make skin contact with a conductive work sur-face first and maintain this contact when thedevice is set down or picked up.

7. Always wear a conductive strip when servic-ing this equipment. the Motorola part numberfor a replacement wrist strap that connects tothe table mat is 42-80385A59.

8. When straightening CMOS pins, provideground straps for apparatus used.

9. When soldering, use a grounded solderingiron.

Repair Procedures and Techniques

The radio support center is at the following addresses:

Motorola Radio Support Center3651 South Central AvenueRockford, Ill, 61102Telephone: (800) 227-6772(815) 847-1400

Refer to the Disassembly and Reassembly section ofthe manual for pertinent information prior to replacingand substituting parts.

Parts Replacement

Special care should be taken to be as certain as possiblethat a suspected component is actually the one at fault.This special care will eliminate unnecessary unsolder-ing and removal of parts, which could damage orweaken other components or the printed circuit boarditself.

When damaged parts are replaced, identical partsshould be used. If the identical replacement compo-nent is not locally available, check the parts list for theproper Motorola part number and order the compo-nent from the nearest Motorola Communications Partsoffice.

Rigid Circuit Boards

This family of radios uses bonded, multi-layer, printedcircuit boards. Since the inner layers are not accessible,some special considerations are required when solder-ing and unsoldering components. The printed-throughholes may interconnect multiple layers of the printedcircuit.

CAUTIONTherefore, care should be exercised to

avoid pulling the plated circuit out ofthe hole.

When soldering near the 16 or 18-pin connector, usecare to avoid accidentally getting solder in the connec-tor.

CAUTIONBe careful not to form solder bridgesbetween the connector pins. Closelyexamine your work for shorts due tosolder bridges.

Chip Components

Use either the RLN4062 Hot-Air Repair Station or theMotorola 0180381B45 Repair Station for chip compo-nent replacement. When using the 0180381B45 RepairStation, select the TJ-65 mini-thermojet hand piece. Oneither unit, adjust the temperature control to 700˚ F

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GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Basic Maintenance

Repair Procedures and Techniques

(370˚ C), and adjust the airflow to a minimum setting.Airflow can vary due to component density.

Chip Component Removal

To remove a chip component, select a hot-air handpiece and position the nozzle of the hand piece approx-imately 1/8” above the component to be removed.Begin applying the hot air. Once the solder reflows,remove the component using a pair of tweezers. Usingsolder wick and a soldering iron or a power desolder-ing station, remove the excess solder from the pads.

Chip Component Replacement

To replace a chip component using a soldering iron,select the appropriate micro-tipped soldering iron andapply fresh solder to one of the solder pads. Using apair of tweezers, position the new chip component inplace while heating the fresh solder. Once solder wicksonto the new component, remove the heat from the sol-der. Heat the remaining pad with the soldering ironand apply solder until it wicks to the component. Ifnecessary, touch up the first side. All solder jointsshould be smooth and shiny.

To replace a chip component using hot air, select thehot-air hand piece and reflow the solder on the solderpads to smooth it. Apply a drop of solder paste flux toeach pad. Using a pair of tweezers, position the newcomponent in place. Position the hot- air hand pieceapproximately 1/8” above the component and beginapplying heat. Once the solder wicks to the compo-nent, remove the heat and inspect the repair. All jointsshould be smooth and shiny.

Over-Molded Pad-Array Carrier (OMPAC)

ASFIC U0201 is an OMPAC. It must be kept in a sealedbag with dessicant in the bag (in a “dry box” as sup-plied by the Motorola Parts Department prior to use. Ifthe OMPAC is ambient for an unknown amount oftime or for more than 96 hours, then it must be bakedfor at least eight hours at 260˚ F (185˚ C).

If neighboring OMPAC components are heated above365˚ F (185˚ C), they will suffer die-bond delaminationand possible “popcorn” failure.

During all repair procedures, heating neighboringcomponents can be minimized by:

• Using upper heat only. using the correct sizeheat-focus head, approximately the same size asthe carrier being replaced.

• Keeping the heat-focus head approximately 1/8” (0.3cm) above the printed circuit board whenremoving or replacing the device.

OMPAC Removal

To remove the OMPAC, select the R-1319A Air-FlowStation and the appropriate heat- focus head (approxi-mately the same size as the OMPAC. Attach the heat-focus head to the chimney heater. Adjust the tempera-ture control to approximately 415˚ F (215˚ C) 445˚ F(230˚ C) maximum. Adjust the airflow slightly abovethe minimum setting. Apply the solder paste fluxaround the edge of the OMPAC. Place the circuit boardin the R-1070A's circuit board holder, and position theOMPAC under the heat-focus head. Lower the vacuumtip and attach it to the OMPAC by turning on the vac-uum pump. Lower the heat-focus head until it isapproximately 1/8” (0.3cm) above the carrier. Turn onthe heater and wait until the OMPAC lifts off the circuitboard. Once the part is off, grab it with a pair of twee-zers and turn off the vacuum pump. Remove the circuitboard from the R-1070A's circuit board holder.

OMPAC Replacement

To replace the OMPAC, the solder pads on the boardmust first be cleaned of all solder to ensure alignmentof the new chip carrier. Prepare the sight by using sol-der wick and a soldering iron to remove all solder fromthe solder pads on the circuit board. If a power desol-dering tool is available, it can be used instead of the sol-der wick. Clean the solder pads with alcohol and asmall brush. Dry and inspect. Ensure that all solder isremoved.

Once the preparation is complete, place the circuitboard back in the R-1070A's circuit board holder. Addsolder paste flux in the trench of the flux block andspread it using a one-inch putty knife. Flux theOMPAC by placing it in the trench of the flux block.Once the flux is applied, place the OMPAC on the cir-cuit board, making certain that it is oriented correctlyon the board. Position the heat-focus head over theOMPAC and lower it to approximately 1/8” (0.3cm)over the carrier. Using the same heat and airflow set-ting used to remove the OMPAC, turn on the heaterand wait for the carrier to reflow (heating and reflowshould take longer than 60 seconds).

Once the carrier reflows, raise the heat-focus head andwait approximately one minute for the part to cool.Remove the circuit board and inspect the repair. Nocleaning should be necessary.

Shields

Removing and replacing the shields will be done withthe R-1070A, using the same heat and airflow profileused to remove and replace OMPAC components.

Shield Removal

Place the circuit board in the R-1070A's holder. Selectthe proper heat focus head and attach it to the heater

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Basic Maintenance GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Repair Procedures and Techniques

chimney. Add solder paste flux around the base of theshield. Position the shield under the heat-focus head.Lower the vacuum tip and attach it to the shield byturning on the vacuum pump. Lower the focus headuntil it is approximately 1/8”(0.3cm) above the shield.Turn on the heater and wait until the shield lifts off thecircuit board. Once the shield is off, turn off the heat,grab the part with a pair of tweezers, and turn off thevacuum pump. Remove the circuit board from the R-1070A's circuit board holder.

Shield Replacement

To replace the shield, add solder to the shield if neces-sary, using a micro-tipped soldering iron. Next, rub thesoldering iron tip along the edge of the shield tosmooth out any excess solder. Use solder wick and asoldering iron to remove excess solder from the solderpads on the circuit board. Place the circuit board backin the R-1070A's circuit board holder. Place the shieldon the circuit board using a pair of tweezers. Positionthe heat-focus head over the shield and lower it toapproximately 1/8” above the shield. Turn on theheater and wait for the solder to reflow.

Once complete, turn off the heat, raise the heatfocushead, and wait approximately one minute for the partto cool. Remove the circuit board and inspect therepair. No cleaning should be necessary.

Replacement of Transistor Q6505

This section provides a replacement procedure forQ6505, the RF power output transistor in the 30-Wattpower amplifier.

To replace Q6505, proceed as follows:

Before proceeding, ensure that the following tools andmaterials are on hand:

• Alcohol (isopropyl).

• High temperature solder, SN96AG04 composi-tion. Motorola Part No. 1180433L04.

• Hot air gun (600 degrees maximum tempera-ture).

• Low lint wipers.

• Soldering station including a soldering ironwith chisel-style tip which is approximately 1/8-inch in size.

• Solder flux.

• Solder wick.

• Stiff brush, natural bristles approximately 1-cmhigh and 1-cm wide.

• Thermal compound, Motorola Part No.1180382B13.

• Transistor assembley tool 0293.

1. Remove main board from radio chassis fol-lowing procedure provided in Section 6 of thisservice manual, Motorola Publication6880906Z19.

2. After main board is removed from radio chas-sis, clean off thermal paste from all surfacesthat have thermal paste on them using lowlint wipers.

Removing Faulty Transistor

1. Before removing faulty transistor, observecarefully how flange capacitors C6567 andC6568 are mounted. This will help you later inmounting new capacitors.

2. Set hot air gun for medium temperature andlow air speed. This will ensure that other com-ponents in vicinity of Q6505 will not get dis-lodged and moved accidently.

3. Train hot air gun on flanges of transistor. Aftera few moments, the solder holding flangeswill reflow enabling transistor and flangecapacitors C6567 and C6568 to be lifted offmain board together.

Preparing Main Board for New Transistor

1. Using solder wick, isopropyl alcohol, and stiffbristle brush, remove excess solder and cleanpads on main board where transistor was sol-dered.

2. Place main board, with its heavy side up, ontransistor assembly tool. Heavy side is sidewith PA module and antenna connector. Makecertain that all guide pins on transistor assem-bly tool are engaged into their correspondingholes in main board.

3. Identify the six pads on main board corre-sponding to the six flanges on transistor. Thefour corner pads are ground; the middle padtowards antenna connector is the transistorcollector; and the opposite middle pad is thetransistor emitter.

NOTEIn next step, be certain to tin transistorpads and fill via holes with high temper-ature solder, composition SN96PB04.

4. Using solder iron, carefully tin each of the sixpads so that they are covered with a thin coatof solder and all via holes are filled.

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GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Basic Maintenance

Repair Procedures and Techniques

Positioning New Transistor

1. Place a small spot of flux on each of the sixmain-board pads to which the flanges of tran-sistor are to be soldered.

2. Insert the narrow-diameter side of a spacer,Motorola Part Number 4380545K01, into eachof the two transistor mounting holes in mainboard.

3. Ensure that new transistor is correct replace-ment type by verifying that M25C20 is printedon transistor face.

NOTECollector flange of transistor is the onewith its corner cut off.

4. Position new transistor onto transceiver boardwith collector flange oriented towardsantenna connector. Ensure that transistor issitting snug on main board with all six flangesflat on their corresponding main-board pads.

5. Lower arm of Distaco clamp on transistorassembly tool. Then lock clamp with its leverto clamp transistor in place on main board.

Soldering Transistor

1. Place a small spot of flux on each of the sixtransistor flanges.

2. 2. Solder each transistor flange to transceiverboard as follows:

2A. Set soldering iron temperature to approxi-mately 400 degrees Centigrade.

2B. Melt a small mound of solder onto flat faceof soldering iron.

CAUTIONIn next step, to avoid damage to transis-tor and capacitors, ensure that each sol-dering operation takes no more thanthree to four seconds to accomplish.

3. Press face of soldering iron firmly to flange forno more than three to four seconds.

4. Inspect transistor flange carefully to ensure itis soldered securely, and that it is not shortedto any of the other flanges or to the transistorheat sink.

Installing Flange Capacitors C6567 and C6568.

NOTECapac i tors C6567 and C6568 getmounted flat on transistor collector andground flanges with non-solderable edgeflush against transistor body. Each capac-itor is attached by soldering its outsidesolderable edge to one of the transistorground flanges and its inside solderableedge to transistor collector flange. Theremust be a gap of approximately 2 milli-meters between the two capacitors (i.e.,room to insert a chisel style solder irontip) to ensure that good solder joints canbe made between capacitor leads andcollector flange of transistor.

1. Ensure that both capacitors C6567 and C6568are correct replacement type by verifying thatMotorola Part Number is 2113742B23, value is12pF, and marking is Cl.

CAUTIONIn next two steps, to avoid damage totransistor and capacitors, ensure thatsoldering operations take no more thanthree to four seconds to accomplish.

2. Solder outside solderable edge of each capaci-tor to one transistor ground flange, being cer-tain that each capacitor is flat on transistorflange with non-solderable edge flush againsttransistor body.

3. Place a small drop of flux on transistor collec-tor flange between capacitors. Place chiselstyle solder iron tip between capacitors andonto collector flange of transistor. Feed insome high temperature solder (SN96PB04) sothat inside solderable edges of both capacitorsare soldered securely to collector flange oftransistor.

4. Examine soldered capacitors. Ensure that theyare reasonably flush against transistor bodyand are not shorting transistor collector flangeto transistor heat sink.

5. Examine surrounding components to ensurethat none of them have been damaged or dis-placed.

Reassembly of Radio

1. Examine face of transistor heat sink. Ensurethat it is free from burrs and flux, which couldprevent a good thermal contact to radio chas-sis.

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Basic Maintenance GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Repair Procedures and Techniques

2. Spread thermal compound on heat sink of thefollowing components:

• Transistor Q6505

• PAmoduleU6501

• Audio PA module U401

• +9.3V voltage regulator U601

3. Install transceiver board into radio chassis fol-lowing procedure provided in Section 6 ofthis service manual, Motorola Publication6880906Z19.

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September, 2000 6880906Z19-O 3-1

Section 3Test Equipment,

Service Aids, and Tools

Test EquipmentThe list in Table 3-1 includes all standard test equipment required for servicing two-way mobile radios. Battery-operated test equipment is recommended when available. The “Characteristics” column is included so that equiv-alent equipment may be substituted; however, when no information is provided in this column, the specific Motor-ola model listed is either a unique item or no substitution is recommended.

Table 3-1. Recommended Test Equipment

Model No. Description Characteristics Application

R2000 Serieswith trunking op-tion

CommunicationsSystem Analyzer

Frequency/deviation meter and sig-nal generator for wide-range trouble-shooting and alignment

R1053 Dual TraceOscilloscope

200 MHz bandwidth, For waveform measurements

FLUKE 8012 Digital Multimeter AC/DC voltage and current meter

T1013A Load resistor 0-1000MHz, 300 W For use with wattmeter

S1339A RF Millivolt Meter10 kHz to 1.2 GHz

100 V to 3V rf RF level measurements

R1011B DC Power Supply 0-40Vdc, 30 Amps Bench supply for 13.8Vdc currentlimited

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Test Equipment, Service Aids, and Tools GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Field Programming

Field ProgrammingThe radio can be aligned and programmed in the field. This requires specific equipment and special instructions.refer to the Radio Service Software User’s Manual for complete field programming information.

Table 3-2. Service Aids

Part No. Description Application

RLN4008B Radio Interface Box Enables communications between the radio and thecomputer’s serial communications adapter.

EPN4040A Power Supply Used to supply power to the RIB (240 VAC).

0180358A56 Power Supply Used to supply power to the RIB (220 VAC).

0180357A57 110V AC-to-DC Adapter Used to supply power to the RIB (110 VAC).

3080070N01 Combined Interface Cable Connects radio to RLN4008B RIB.

GKN6270A DC Power Cable for radio Interconnects radio to power supply.

HKN4191B 35 W Power Cable forradio

Interconnects radio to power supply.

3080369B72 Computer Interface Cable Connects the computer’s serial communicationsadapter (9 pin) to the RIB.

3080369B71 Computer Interface Cable Connects the computer’s serial communicationsadapter (25 pin) to the RIB.

RLN4438A Adapter 25 pin (F) to 9 pin (M) adapter, for use with 3080369B72for AT applications.

RVN4150B Radio Service Software(RSS)

For GTX radio programming.

68P02948C70 GTX (RSS) Radio ServiceSoftware Manual

Provides detailed instruction on RSS used in GTX radi-os.

RLN4460A Test Fixture For radio testing

3008566C12 Test Cable For connecting between the radio and RLN4460A.

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September, 2000 6880906Z19-O 3-3

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Test Equipment, Service Aids, and Tools

Service Tools

Service ToolsThe following table lists the tools recommended for working on the radio; these are also available from Motorola.Note that the R-1070A workstation requires the use of a specific “heat focus head” for each of the components onwhich this item is used. Each of these heat focus heads must be ordered separately.

Table 3-3. Service Tools

Part No. Description Application

0180381B45 110 VAC or0180300E06 220 VAC

MBT250 Surface-mount/through-hole repair sta-tion

Temperature-controlled, self-contained solder-ing/desoldering repair station for installationand removal of surface-mounted devices.

8180369E97 Flux holder/applicator Allows for the proper amount of flux to be ap-plied to pad grid arrays for repair.

1105139W02 30cc plastic syringe andflux paste

For use with flux holder/applicator 8180369E97.

0180386A81 Miniature digital read-out soldering station (in-cludes 1/64” micropointtip)

0180386A78 Illuminated magnifyingglass with lens attach-ment

0180386A82 Anti-static grounding kit Used during all radio assembly and disassemblyprocedures

6684253C72 Straight prober

6680384A98 Brush

1010041A86 Solder (RMA type),63/37, 0.020” diameter, 1lb. spool

R-1070A(superseded by R1319A)

Shields and surface-mounted component - ICremoval/rework station

Removal of surface-mounted integrated circuits

R1319A

6680332E826680332E836680332E846680333E28

Surface-Mounted DeviceRework StationR1319A Reflow NozzleR1319A Reflow NozzleR1319A Reflow NozzleR1319A Reflow Nozzle

Removal of surface-mounted integrated circuits

For IC removal (approximate size 0.8 in. x 0.8 in.)For IC removal (approximate size 0.6 in. x 0.6 in.)For IC removal (approximate size 0.5 in. x 0.5 in.)For removal of RF PA

0293 Transmitter AssemblyTool

Replacement for transisator Q6505

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Test Equipment, Service Aids, and Tools GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Service Tools

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September, 2000 6880906Z19-O 4-1

Section 4Test Mode, Error Codesand Performance Tests

Front Panel Test ModeThe functions of the radio controls for the Front PanelTest Mode are as follows:

Test Mode/Entry

Test Mode allows radio checks to be performed in thefield. To provide a level of protection to the Test Modeentry, proceed according to the following sequence:

1. Place radio in TRUNKING operation modeand wait for 6 seconds. (See Quick Start cardfor instructions on how to enter that mode.)

2. Turn radio off.

3. Verify that RIB is off.

4. Turn radio power supply (13.6 V DC) on .

5. Turn radio on.

The radio enters Test Mode operation:

• Speaker unmutes.

• One beep is heard to indicate operation on thefirst test frequency (default).

• Display shows "4 1" .

Test Mode/Channel Selection

Use the PTT switch for channel selection. A short pressand de-press on the PTT switch (button-like push) willadvance the radio to the next channel (cyclical) . Sevenchannels are available during test mode, as shown inTable 4-1.

Test Mode/Tx Modulation

Use PTT switch for modulation type selection. A con-tinuous press will advance the radio to the next modu-lation test (cyclic scroll ) and perform Tx test until PTTis released. The modulation selection is described inTable 4-2.

MODE (4 IS INITIAL MODE)

CHANNEL

Table 4-1. Test Mode/Channel SelectionChannel Number Rx Frequency Tx Frequency Display

1 935.0125 MHz 896.0125 MHz “M 1” (2)

2 941.9875 MHz 901.9875 MHz “M 2” (2)

3 938.5125 MHz 899.5125 MHz “M 3” (2)

4 CC1 (1) CC1-45 MHz “M 4” (2)

5 CC2 (1) CC2-45 MHz “M 5” (2)

6 CC3 (1) CC3-45 MHz “M 6” (2)

7 CC4 (1) CC4-45 MHz “M 7” (2)

1. CC1-CC4 are control channels programmed in association with the selected trunking system.2. M stands for modulation type (0-3). See Table 4-2.

Table 4-2. Test Mode/Tx ModulationModulation Type Internal Speaker Audio Signaling Internal Microphone Status Display

CSQ None On “0 C” (1)

Low Speed Busy Channel On “1 C” (1)

High Speed Call Back Off “2 C” (1)

DTMF “#” DTMF “#” Off “3 C” (1)

1. C stands for the selected channel (1-7). See Table 4-1.

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Test Mode, Error Codes and Performance Tests GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Front Panel Test Mode

Fail Mode

The radio will enter Fail Mode upon detecting one ofthe following errors:

• Application startup self check error

• Codeplug information check error

There are two categories of errors: critical and non-crit-ical. Critical errors will stop radio normal operation.Refer to Table 4-3.

Exiting Test Mode

To exit Test Mode, proceed as follows:

• Turn radio off.

• Turn RIB on.

Table 4-3. Fail ModeError number Failure Description Display Critical Tone Sound

1 Internal RAM F 01 Yes Illegal tone

2 External RAM F 02 Yes Illegal tone

5 OTP checksum F 05 Yes Illegal tone

6 Codeplug checksum E 06 Yes Illegal tone

7 (1) Codeplug personality E 06 No Illegal Tone (when selectedpersonality has checksum er-ror)

8 Codeplug tuning error E 06 Yes Ilegal tone

1. For error no. 7, personality (system) change is allowed although the illegal tone is heard. For error no. 8the temporary illegal tone is heard. (See the Quick Start card for instructions on how to change personality.)To exit fail mode, power radio off.

Non-critical errors will be temporarily indicated as described in Table 4-2.

Table 4-4. Transmitter Performance ChecksTest

NameCommunication

Analyzer Radio Test Set Comments

Reference Fre-quency

Mode: PWR MON2nd channel test frequencyMonitor. Frequency error in-put at RF In/Out

TEST MODE, Dis-play: 2 0

PTT to continuous(during the perfor-mance check)

Frequency error to be< 700 Hz

Power RF Same as Above TEST MODE,Display: 2 0

Same as Above Refer to MaintenanceSpecification page x

Voice Modula-tion

Mode: PWR MON4th channel test frequencyatten to -70, input to rf In/Out Monitor: DVM, AC VoltsSet 1kHz mod Out level for0.025Vrms at test set,80mVrms at AC/DC test setjack.

TEST MODE,Display: 2 0

Same as Above,meter selector tomic

Deviation:800 MHz:3.6 kHz but 5.0 kHz900 MHz: 2.5 kH

Low-SpeedDataModulation800/900

Same as Above TEST MODE,Display: 2 1

PTT to continuous(during the perfor-mance check)

Deviation:800 MHz:800 Hz but 1200 Hz900 MHz: 350 Hz 650 Hz

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September, 2000 6880906Z19-O 4-3

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Test Mode, Error Codes and Performance Tests

Front Panel Test Mode

Voice Modula-tion (Internal)

Mode: PWR MON2nd channel test frequencyatten to -70, input to RF In/Out

TEST MODE,Display: 2 0

Remove modula-tion input

Press PTT switch on ra-dio. Say “four” loudlyinto the radio mic. Mea-sure deviation:800 MHz:3.8 kHz but 5.0 kHz900 MHz: 2.5 kHz

High-SpeedData Modula-tion

Same as Above TEST MODE,Display: 2 2

PTT to continuous(during the perfor-mance check)

Deviation:800 MHz:2.3 kHz but 3.8 kHz900 MHz :1.2 kHz but 2 kHz

DTMF Modula-tion(# SIGN)

Same as Above2nd channel test frequency

TEST MODE, Dis-play: 2 3output at antenna

Same as Above Deviation:800 MHz:2.8 kHz but 3.8 kHz900 MHz :1.4 kHz but 1.9 kHz

PL/DPL Modu-lation (radioswith conven-tional codedsquelch opera-tion only)

Change frequency to aconventional transmitfrequency, BW to narrow

Conventionalcoded squelchpersonality

Same as Above Deviation:800 MHz:500 Hz but 1000 Hz900 MHz:250 Hz but 500 Hz

Talk-aroundModulation (ra-dios with con-ventional talk-around opera-tion only)

Change frequency to conven-tional talk-around frequency.Mode:PWR MONdeviation, attenuation to -70,input to RF In/OutMonitor: DVM, AC voltsSet 1kHz Mod Out level for25mVrms at test set.

Conventionaltalk-around per-sonality

Same as Above Deviation:800 MHz:3.8 kHz but 5.0 kHz900 MHz :1.9 kHz but 2.45 kHz

Table 4-5. Receiver Performance ChecksTest

NameCommunication

Analyzer Radio Test Set Comments

Rated Audio Mode: GENOutput level: 1.0mV RF1st Channel test frequencyMod: 1 kHz tone at3 kHz deviationMonitor: DVM: AC Volts

TEST MODE,Channel 0Modulation Type1

PTT to OFF (center),meter to Audio PA

Set volume con-trol to 3.74 Vrms

Distortion Same as above, except for dis-tortion

Same as Above Same as Above Distortion <5.0%

Sensitivity(SINAD)

Same as above, except SINAD,lower the rf level for 12 dB SI-NAD

Same as Above PTT to OFF (center) RF input to be<0.35 V

Table 4-4. Transmitter Performance Checks (Cont'd.)Test

NameCommunication

Analyzer Radio Test Set Comments

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Test Mode, Error Codes and Performance Tests GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Front Panel Test Mode

Noise SquelchThreshold(only radios withconventional sys-tem need to betested

RF level set to 1mV RF Same as Above PTT to OFF (center),meter selection to Au-dio PA, spkr/load tospeaker

Set volume con-trol to 3.74 Vrms

As above, except change fre-quency to a conventional sys-tem. Raise RF level from Zerountil radio unsquelches.

out of TESTMODE, select aconventional sys-tem

Same as Above Unsquelch to oc-cur at <0.3 VPreferred SI-NAD=<12 dB

Table 4-5. Receiver Performance Checks (Cont'd.)Test

NameCommunication

Analyzer Radio Test Set Comments

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September, 2000 6880906Z19-O 5-1

Section 5Disassembly & Reassembly

For 12 W Models

IntroductionThis chapter explains, step by step, how to disassembleand assemble the radio, to board level.

Disassemble the Radio

Remove the Control Head

1. Turn the radio upside down.

2. Insert a small flat blade screw driver, or simi-lar, in the recess between the control head andthe chassis. Refer to Figure 5-1.

3. Press until the side of the control headreleases.

4. Pull the control head away from the radio.

5. Remove the speaker pad and flat cable fromthe connector on the radio side. Refer toFigure 5-2 and Figure 5-6.

Remove the Top Cover

1. Turn the radio upside down.

2. Insert a small flat bladed screw driver in the siderecesses between the cover and the chassis.

3. Tilt the cover until the side snaps off the latch.

4. Repeat the operation on the opposite side ofthe radio.

5. Turn the radio right side up.

6. Lift the top cover over the chassis.

CONTROL HEAD

RECESS

Figure 5-1. Control Head Removal

Figure 5-2. Flat Cable Removal

Figure 5-3. Top Cover Removal

SIDE RECESS

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Disassembly & Reassembly For 12 W Models GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Disassemble the Radio

Remove the Main Board

1. Remove the 3 screws of the PA shield using aT8 TORX driver. Remove the PA shield bygently prying up each corner of the shield.

2. Remove the power and antenna connectorretaining clips by inserting a small flat bladescrew driver between the clip and the top ofthe chassis wall and gently prying the clipupwards.

3. Pull out the accessory clamp and connectorgasket.

4. Pull out the accessory kit.

5. Remove the 8 screws securing the main boardto the chassis.

6. Carefully remove the main board by rotatingit out of the chassis.

7. Slowly lift the board on the front edge, theside with the connector that mates with thecontrol head, and pull gently toward the frontof the radio.

CAUTIONThe thermal grease can act as an adhe-sive and cause the leads of the heat dis-sipating devices to be over stressed ifthe board is lifted too quickly.

Disassemble the Control Head

1. To pull out the circuit board from the controlhead housing, insert a small bladed screwdriver in the side groove near the four pro-

truding tabs. Remove the board from the con-trol head housing.

2. Disconnect the speaker from the board byremoving it from the socket.

3. Remove the keypad from the control headhousing by lifting it up from the board. Careshould be taken not to touch or get other con-taminates on the conductive pads on theunder side of the keypad or conductive con-tacts on the printed circuit board.

4. Take the LCD frame out of the control head.

TAB

KEYPAD

LCD FRAME

VOLUME KNOB

ZEBRA CONNECTOR

POTENTIOMETER

SPEAKER

FLAT CABLE

PART OF LCD FRAME

HOUSING

Figure 5-5. Control Head Removal

CLIPS

SHIELD

Figure 5-4. Main Board Removal

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September, 2000 6880906Z19-O 5-3

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Disassembly & Reassembly For 12 W Models

Assemble the Radio

Assemble the Radio

Assemble the Control Head

1. Insert the LCD frame with LCD and Zebraconnectors into its place.

2. Place the keypad onto the board assembly,making sure the keypad is flush with theboard.

3. Rotate the potentiometer counterclockwise.Rotate the volume knob counterclockwise.This will allow you to insert the potentiometersmoothly into its place in the volume knob.

4. Make sure the speaker including the gasket iswell positioned into the pocket of the hous-ing..

5. Connect the speaker to the circuit board.

6. During the installation of the circuit board,ensure the four protruding tabs snap into therecesses.

Replace the Main Board

1. Inspect and if necessary, reapply thermalgrease to the heatsinking pads in the chassis.

2. Rotate the main board into the chassis andensure that the board is flush to the chassis.

3. Install the 8 screws with 0.4 -07 NM (4-6 inlbs) of torque using a T8 TORX driver.

4. Before installing the connector retaining clips,ensure that the board is sitting flush on thechassis mounting surface.

5. Install the PA shield and secure it with 3screws.

Replace the Top Cover and Control Head

1. Position the top cover over the chassis andreplace. Ensure that the chassis crosses snapinto the cover’s openings.

2. Connect the flat cable to the connector on theradio.

3. Assemble the speaker pad by sliding the slit ofthe pad over the flat cable. Refer to Figure 5-6.

4. Push the speaker pad onto the chassis.

5. Press the control head onto the chassis untilthe protruding taps on the chassis snap intothe recesses inside the housing.

Figure 5-6.

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Disassembly & Reassembly For 12 W Models GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Assemble the Radio

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September, 2000 6880906Z19-O 6-1

Section 6Disassembly & Reassembly

For 30 W Models

Introduction

This chapter explains, step by step, how to disassembleand assemble the radio, to board level.

Disassemble the Radio

Remove the Control Head

1. Turn the radio upside down.

2. Insert a small flat blade screw driver, or simi-lar, in the recess between the control head andthe chassis. Refer to Figure 6-1.

3. Press until the side of the control headreleases.

4. Pull the control head away from the radio.

5. Remove the speaker pad and flat cable fromthe connector on the radio side. Refer toFigure 6-2 and Figure 6-7.

Remove the Top Cover

1. Turn the radio upside down.

2. Insert a small flat bladed screw driver in the siderecesses between the cover and the chassis.

3. Tilt the cover until the side snaps off the latch.

4. Repeat the operation on the opposite side ofthe radio.

5. Turn the radio right side up.

6. Lift the top cover over the chassis.

CONTROL HEAD

RECESS

Figure 6-1. Control Head Removal

Figure 6-2. Flat Cable Removal

Figure 6-3. Top Cover Removal

SIDE RECESS

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Disassembly & Reassembly For 30 W Models GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Disassemble the Radio

Remove the Main Board

1. Remove the 4 screws of the PA shield using aT8 TORX driver.

CAUTIONThe PA shield has sharp edges. Handlewith care when removing and replacing.

2. Remove the PA shield as follows:

2A. Hold the shield handle with your index andmiddle fingers while pressing your thumbdownward on the shield. Keep all fingerscurled upward as shown in Figure 6-4.

2B. Keeping the other hand away from the PAshield, place your thumb on top of the frontof the radio while placing your fingersunderneath the chassis. Refer to Figure 6-4.Make sure this hand is away from the PAshield.

2C. Holding the chassis firmly, remove the PAshield by pulling upward on the handle.

3. Remove the antenna connector retaining clipby inserting a small flat bladed screw driverbetween the clip and the top of the chassiswall and gently prying the clip upwards.

4. Pull out the accessory clamp and connectorgasket.

5. Pull out the accessory kit.

6. Twist the sleeve of the power cable 90 degreesand lift up and out from the chassis.

7. Remove the 14 screws securing the mainboard to the chassis.

8. Carefully remove the main board by rotatingit out of the chassis.

9. Slowly lift the board on the front edge, theside with the connector that mates with thecontrol head, and pull gently toward the frontof the radio.

CAUTIONThe thermal grease can act as an adhe-sive and cause the leads of the heat dis-sipating devices to be over stressed ifthe board is lifted too quickly.

Disassemble the Control Head

1. To pull out the circuit board from the controlhead housing, by inserting a small bladedscrew driver in the side groove near the fourprotruding tabs. Remove the board from thecontrol head housing.

2. Disconnect the speaker from the board byremoving it from the socket.

3. Remove the keypad from the control headhousing by lifting it up from the board. Careshould be taken not to touch or get other con-taminates on the conductive pads on theunder side of the keypad or conductive con-tacts on the printed circuit board.

4. Take the LCD frame out of the control head.

Figure 6-4. Shield Removal

CLIP

SHIELD

Figure 6-5. Main Board Removal

Page 39: Engineering Gtx

September, 2000 6880906Z19-O 6-3

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Disassembly & Reassembly For 30 W Models

Assemble the Radio

Assemble the Radio

Assemble the Control Head

1. Insert the LCD frame with LCD and Zebraconnectors into its place.

2. Place the keypad onto the board assembly,making sure the keypad is flush with theboard.

3. Rotate the potentiometer counterclockwise.Rotate the volume knob counterclockwise.This will allow you to insert the potentiometersmoothly into its place in the volume knob.

4. Make sure the speaker is well positioned intothe pocket of the housing.

5. Connect the speaker to the circuit board.

6. During the installation of the circuit board,ensure the four protruding tabs snap into therecesses.

Replace the Main Board

1. Inspect and if necessary, reapply thermalgrease to the heatsinking pads in the chassis.

2. Rotate the main board into the chassis andensure that the board is flush to the chassis.

3. Install the 14 screws with 0.4 -07 NM (4-6 inlbs) of torque using a T8 TORX driver.

4. Before installing the connector retaining clipand power cable, ensure that the board is sit-ting flush on the chassis mounting surface.

5. Install the PA shield and secure it with the 4screws.

Replace the Top Cover and Control Head

1. Position the top cover over the chassis andreplace. Ensure that the chassis crosses snapinto the cover’s openings.

2. Connect the flat cable to the connector on theradio.

3. Assemble the speaker pad by sliding the slit ofthe pad over the flat cable. Refer to Figure 6-7.

4. Push the speaker pad onto the chassis.

5. Press the control head onto the chassis untilthe protruding taps on the chassis snap intothe recesses inside the housing.

TAB

KEYPAD

LCD FRAME

VOLUME KNOB

ZEBRA CONNECTOR

POTENTIOMETER

SPEAKER

FLAT CABLE

PART OF LCD FRAME

HOUSING

Figure 6-6. Control Head Removal

Figure 6-7.

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Disassembly & Reassembly For 30 W Models GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Assemble the Radio

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September, 2000 6880906Z19-O 7-1

Section 7Radio Tuning Procedure

Radio Tuning Procedure

General

An IBM PC (personal computer) and RSS (Radio Ser-vice Software) are required to align the radio. Refer tothe applicable RSS Manual for installation and setupprocedures for the software.

To perform the alignment procedures, the radio mustbe connected to the PC, RIB (Radio Interface Box), andTest Set as shown in Figure 7-1.

Service Menu

Figure 7-2 illustrates the Main Service Menu structure.All SERVICE screens read and program the radio code-plug directly; you do NOT have to use the RSS GET/SAVE functions to program new tuning values.

CAUTIONDo NOT switch radios in the middle ofany SERVICE procedure. Always use theEXIT key to return to the MAIN menuscreen before disconnecting the radio.Improper exits from the SERVICEscreens may leave the radio in animproperly configured state and result inseriously degraded radio or system per-formance.

The SERVICE screens use the concept of the “Softpot”,an analog SOFTware controlled POTentiometer usedfor adjusting all transceiver alignment controls.

Each SERVICE screen provides the capability toincrease or decrease the ‘softpot’ value with the key-board UP/DOWN arrow keys respectively. A graphi-cal scale is displayed indicating the minimum,maximum, and proposed value of the softpot, asshown in Figure 7-3.

BNC

RIB

RIB POWER SUPPLY

COMPUTER INTERFACE CABLE

DATA

GND

COMPUTER

AUDIO GENERATOR

SINAD METER

AC VOLTMETER

TX

RX

30 dB PAD

30 dB PAD

RF GENERATOR

SERVICE MONITOR

WATTMETER

TRANSMIT

RECEIVE

TEST SETRADIO

PROGRAM or

AUDIO IN

Mini-U BNC

TEST CABLE

15-PIN25-PIN

Note: Battery can be used in RIB

MIC IN

or COUNTER

0180357A57, 110 V, USA

RLN4008B

30-80369B72 (IBM AT, 9-PIN ONLY)30-80369B71 (IBM XT, 25-PIN ONLY)

making power supply optional.

58-80348B33

TEST CABLE3080070N01

RLN4460A

3008566C12

0180358A56, 110 V, USA

Figure 7-1. Radio Alignment Test Setup

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Radio Tuning Procedure GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Tuning Procedure

Tuning Procedure

Starting the Tuning Procedure

1. From the SERVICE menu, press F6 to selectBOARD REPLACEMENT.

2. Press F2 for LOGIC OR RF BOARD replace-ment.

NOTEPerform the following procedures in thesequence indicated.

Alignment Default Data

1. Press F2 to select ALIGNMENT DEFAULTDATA.

2. Press F8 for PROGRAM VALUE.

Tx Power

1. Press F3 to select Tx POWER.

2. Press F6 to key the radio. The screen will indi-cate that the radio is transmitting.

3. Adjust the transmit power value with the UP/DOWN arrow keys.

4. Press F6 again to dekey the radio, and thenpress F8 to program the softpot value.

Reference Oscillator Alignment

NOTEThe frequency of the transmitter must bechecked on installation and at least annu-ally.

Adjustment of the reference oscillator is critical forproper radio operation. Improper adjustment will notonly result in poor operation, but also a misalignedradio that will interfere with other users operating onadjacent channels. For this reason, the reference oscilla-tor should be checked every time the radio is serviced.The frequency counter used for this procedure musthave a stability of 0.1 ppm (or better).

1. Press F4 to select the REFERENCE OSCILLA-TOR softpot.

2. Press F6 to key the radio. The screen will indi-cate that the radio is transmitting.

3. Measure the transmit frequency that appearson the screen of your frequency counter.

4. Use the UP/DOWN arrow keys to adjust thereference oscillator.

5. Press F6 again to dekey the radio and thenpress F8 to program the softpot value.

Transmitter Power

NOTEDuring Tx POWER tuning, measure andnote the DC transmit current (ITx) foreach channel in the high power band.

F6F2

AlignmentMenu

BoardReplacement

Menu

ServiceMenu

F2 Logic or RF Board ReplacementF3 Tx PowerF4 Warp Reference FrequencyF5 Tx Power CalibrationF6 Tx Deviation Calibration

F3 Deviation AdjustmentF5 Reference Oscillator WarpF7 Transmitter PowerF8 Squelch Adjustment F9 Squelch Adjustment

Figure 7-2. Service Menu Structure

MAEPF-22858-O

Min.Value

Max.Value

0 15

Figure 7-3. Softpot Concept

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September, 2000 6880906Z19-O 7-3

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Radio Tuning Procedure

Tuning Procedure

1. Press F5 to select the Tx POWER calibrationsoftpot. The screen will indicate the transmittest frequencies to be used.

2. Press F6 to key the radio.

3. Use the UP/DOWN arrow keys to adjust thetransmit power value.

4. Press Enter to select next softpot frequency.

5. Repeat steps 3 and 4 for the remaining test fre-quencies.

6. Press F6 to dekey the radio.

7. Press F8 to program the value.

Transmit Current Limit

NOTELarger Softpot values yields increasedCUTBACK resu l t ing in LOWERPOWER.

1. After Tx POWER tuning the TRANSMIT CUR-RENT LIMIT screen will appear. Select the fre-quency with the highest DC transmit current(ITx) measured during the Tx POWER tuningprocuedure.

2. Press F6 to key the radio.

3. Use the UP/DOWN arrow keys to adjust theDC transmit current value per Table 7-1.

4. Press F6 to dekey the radio.

5. Press F8 to program the value.

Transmit Deviation Balance(Compensation) & Deviation Limit

Compensation alignment balances the modulationsensitivity of the VCO and reference modulation (syn-thesizer low frequency port) lines. Compensation algo-rithm is critical to the operation of signaling schemesthat have very low frequency components (e.g. DPL)and could result in distorted waveforms if improperlyadjusted.

1. Press F6 to select TX DEVIATION CALIBRA-TION. The screen will indicate the transmittest frequencies to be used.

2. Begin with the lowest test frequency shown onthe screen.

3. Press F6 to key the radio. Record this measure-ment.

4. Press F4 to select 2.5 kHz.

5. Use the UP/DOWN arrow keys to adjust thedeviation to within 0.5 dB of the valuerecorded in step 3.

6. Press Enter to move to next softpot value.

7. Repeat steps 5 and 6 for the remaining fre-quencies.

8. Press F8 to program the softpot value.

Transmit Deviation Limit

The transmit deviation limit softpot sets the maximumdeviation of the carrier. Tuning is performed for 12.5kHz channel spacing.

1. Begin with the lowest test frequency shown onthe screen.

2. Press F6 to key the radio.

3. With Test Box 4460A: inject a 1 kHz tone, 2000mVrms.

4. Use the UP/DOWN arrow keys to adjust thedeviation to between 2.2 kHz and 2.4kHz.

5. Press Enter to move to the next softpot value.

6. Repeat steps 4 and 5 for the remaining fre-quencies shown on the screen.

7. Press F6 to dekey the radio.

8. Press F8 to program the softpot value.

Squelch

The squelch softpots set the signal to noise ratio atwhich the squelch opens.

1. Press F9 to select SQUELCH Adjustment.

2. Adjust the UP/DOWN arrow key to the mini-mum squelch value.

3. Apply a standard RF input level of -47 dBm tothe radio on the test frequency.

Table 7-1. Transmit Current Limit Tune Windows

Model Min Max

900_12W 4.60 A 5.10 A

900_30W ITx + 0.4 A ITx + 1.0 A

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Radio Tuning Procedure GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Tuning Procedure

4. Adjust the radio’s volume control to obtainrated audio power at the external speaker ofthe accessory connector.

5. Reduce the RF input level until 10 dB SINADis measured.

6. Adjust the UP/DOWN arrow key until thesquelch just closes. Monitor for squelch chat-ter and adjust UP as required.

7. When no chatter is detected press F8 to pro-gram.

Ending the Tuning Procedure

1. Press F2 to continue.

2. Press F10, F10 to return to the Service menu

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Section 8Theory of Operation

IntroductionThis section provides theory of operation informationfor the radio. It starts with a block diagram level func-tional description of the entire radio. This is followedby a detailed functional description for each of the fourmajor functions that make up the radio.

Overview

The main radio is a single board design, consisting ofthe transmitter, receiver, and controller circuits.

The control head is mounted directly on the front of theradio. The control head contains a speaker, LED indica-tors, a microphone connector and buttons which pro-vide the user with interface control over the variousfeatures of the radio and a display.

In addition to the power cable and antenna cable, anaccessory cable can be attached to a connector on therear of the radio. The accessory cable provides the nec-essary connections for items such as external speaker,foot operated PTT, ignition sensing, public address,remote desk set and data modem.

Figure 8-1. 900-MHz Radio Functional Block Diagram

CPU CLOCK

MOD

SPI

MOD

2.1 MHZ

SYNTHESIZER

DIRECTIONALCOUPLER

PRE-SELECTOR3-POLE CERAMIC 2-POLE IF BACK-END ASFIC

CPU

KEYBOARDDISPLAY

MEMORY

POWER

CONTROL

HARMONICFILTER

AUDIOPA

RFAMP

PALINEUP

FRAC N

IC

LOOPFILTER

PENDULUM

16.8 MHZ

RX/TXVCO

TAVCO

PRE-SELECTOR3-POLE CERAMIC

SYNTHESIZERLINEUP

RF PA

RECEIVER

AUDIO & LOGIC

MIXER

LO SIGNAL

T/RSWITCH

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Theory of Operation GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Receiver Detailed Functional Description

Receiver Detailed FunctionalDescription

The receiver is composed of four sections: receiverfront end, receiver IF, receiver back end and the AudioSignal Filter IC (ASFIC) that is part of the controllersection.

The RF signal from the antenna switch in the PA sec-tion enters the first bandpass filter (FL5203). The firstbandpass filter has three poles, a 938-MHz center fre-quency, a 6-MHz wide passband and a 35-dB rejectionfor image frequencies (857 to 863MHz).

After the first bandpass filter, the signal passes to a pairof hot-carrier limiting diodes (D5303) placed in front ofRF preamplifier Q5301. The hot-carrier diodes limitstrong signals to prevent them from overdriving the RFpreamplifier and damaging it.

The RX front end is a Low Noise Amplifier (LNA) thatconsists of Q5301. Its main purpuse is to set the noisefigure of the receiver. The front end amplifier as well asthe IF amplifiers are shut off during transmit by K9.1line via switch Q5230, to provide isolation in talk-around mode.

After the LNA, the signal enters a second bandpass fil-ter (FL5204), which is identical to FL5203. The band-pass filters are fixed tuned from 935 to 941 MHz.

After the second bandpass filter, mixer U5211 down-converts the signal to the IF frequency.

The mixer is a passive double-balance mixer that gets alocal oscillator signal in the range of 895.9 to 901.9 MHzfrom the synthesizer and works on 4-dBm power. TheIF frequency is 45.1 MHz. A diplexer matches the

mixer IF port to 50 Ohm out of the IF frequency band.The diplexer consists of R5401, C5404, L5402.

The IF signal is fed to first crystal filter Y5201 throughmatching network L5401, C5200.

Crystal filter Y5201 has two poles. The crystal filter isfollowed by matching elements, that match the filteroutput impedance to the input impedance of IF ampli-fier Q5201.

Following the IF amplifier is a matching network thatmatches the IF amplifier output impedance to the inputimpedance of a second 45.1-MHz crystal filter (Y5202).The second crystal filter is followed by matching ele-ments that match the output of the second crystal filterto the input of the receiver back end circuits. After thematching circuit, the signal passes a pair of hot-carrierlimiting diodes (D5201) placed in front of the back endcircuit.

The receiver back end consists of BBR IC (U5201) thatcontains the following functions:

• Preamplifier & mixer to convert the signal to asecond IF frequency of 455 kHz.

• Second LO circuit

• Second IF amplifiers

• FM Demodulator

• Audio amplifier

In addition to BBR IC, the back end contains the follow-ing components:

• Second LO resonator for 44.645 MHz (Y5211)

• Crystal filters for 455 kHz (FL5201, FL5202)

• Demodulator filter (C5224)

RFAMP

DET_AUDIO

IFAMP RSSI

BPF 455 kHzLOSS = 4 dBBW = 12 kHz

IF BPFCRYSTAL2-POLE

LOSS = 2.5 dBREJ = 10 dB @ 12.5KHz

2ND LO44.654 MHZ

GAIN = 21 dBNF = 3.3 dBIIP3 = 3 dBm

LO_INJ

C. LOSS = 7.5 dB

PRE-SELECTOR3 ELEMENTSCERAMIC FILTER

SW 5 VK9.1

5V_REG

9V3

ADAPT

PRE-SELECTOR3 ELEMENTSCERAMIC FILTER

IF BPFCRYSTAL2-POLE

NF = 7.5 dBLOSS = 2.0 dBREJ = -35 dB @ IMAGE

GAIN = 14 dBNF = 2 dB

BPF 455 kHzLOSS = 6 dBBW = 9 kHz

BBR

LOSS = 2.5 dBREJ = 10 dB @ 12.5KHzLOSS = 2.0 dB

REJ = -35 dB @ IMAGE

Figure 8-2. Receiver Functional Block Diagram

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GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Theory of Operation

Transmitter Detailed Functional Description

The IF signal routed to BBR IC is amplified, convertedto 455 kHz, filtered, limited and demodulated.

Demodulated audio comes out of BBR IC at U5201-28and is fed to the ASFIC, which is part of the radio con-troller section.

In addition to the audio output signal, the receiver sec-tion provides an RSSI (Receiver Signal Strength Indica-tor) at U5201-11. The RSSI signal is fed to the ASFICand accessory connector.

ADAPT signal into U5201-22 controls the BBR IC. Thenormally low (0 VDC) ADAPT signal is high (5 VDC)during change of radio channels, transition from trans-mit to receive or at turn-on. The ADAPT signal is usedto cont ro l precharge of capac i tor C5231 a tDEMOD_OUT. This is done in order to eliminate thetransient during frequency change or when the radiogoes from transmit to receive mode.

Transmitter Detailed FunctionalDescription

12 Watt PA

The 12-W PA is a three-stage radio frequency (RF)power amplifier used to amplify the output from theTX injection lineup to the radio transmit level. It con-sists of driver stage Q6501 followed by a two-stagepower module U6501.

The two stages of the power module operate from theA+ supply voltage. The module is switched on/off bythe K9.1 line through switch U6502 (which connectsthe A+ line to pin 2 of U6501 when transmit is enabled).The RF drive, which is routed into transistor Q6501, iscontrolled from Q6506 via the PA control line. The ris-ing control voltage on the PA control line causes a ris-ing collector voltage on Q6501. This causes morepower out of the stage. Conversely, a decreasing con-trol line voltage decreases the power delivered into thenext stage. By controlling the drive power to U6501and the following stages in the power amplifier lineup,ALC loop is able to regulate the output power of thetransmitter.

The antenna switch is switched synchronously withthe keyed 9.1 voltage. In the transmit mode, this 9.1voltage is high—turning on diodes CR6502, CR6503and CR6504. When CR6502 is turned on, it forms a lowimpedance to the RF transmit path and allows the sig-nal to pass through. Diodes CR6503 and CR6504 shortthe ends of quarter wavelength lines to ground, pre-senting a high impedance towards the receiver. In thisway no power is delivered into the receiver, the trans-mit path remains undisturbed, and the receiver is pro-tected during transmission.

In the receive mode, all these diodes are off. The offcapacitance of CR6502 is tuned by L6508 to form a high

impedance looking into the transmitter. Therefore,energy coming in the receive mode is channeled to theRX port.

Harmonics of the transmitter are attenuated by the har-monic filter. The harmonic filter is formed by inductorsL6513 and L6518 as well as capacitors C6540-C6542,C6551-C6553. This network forms a low-pass filter toattenuate harmonic energy of the transmitter to speci-fications level.

A forward-power detector follows the harmonic filter.This forward-power detector is a microstrip printedcircuit, which couples a small amount of the forwardenergy and to diode CR6506 where it is rectified. Thisrectified signal (VFORWARD) forms the forward volt-age which the power control circuit holds constant.Holding this voltage constant (which is proportional tothe RF rectified energy appearing across the diode)ensures the forward-power out of the radio is held to aconstant value.

Thermistor R6519 senses temperature in the area of thepower module. This signal is fed back into the powercontrol circuit to protect the power amplifier againstover-temperature conditions.

Resistor R6520, in series with the A+ line supply, feedsvoltage to the power module. The voltage across R6520is monitored and the difference voltage is channeled tothe power control circuit. The power control circuitmonitors the voltage drop across the resistor which isdetermined by the magnitude of the drain current inU6501. It uses this as a limiting mechanism wherebythe power control circuit limits the magnitude of cur-rent that can be drawn by U6501. This protects thedevice from over dissipation.

Bias voltage reverse polarity protection for the transmit-ter is provided by diode CR6508. Under reverse polarityconditions to the radio, this diode conducts and protectsthe radio from damage. This diode also provides tran-sient over-voltage protection by breaking down whenthe supply voltage to the radio exceeds 24 V.

30 Watt PA

The 30-Watt PA is a four stage radio frequency (RF)power amplifier used to amplify the output from the TXinjection lineup to the radio transmit level. It consists ofdriver stage Q6501, two-stage power module U6501 andRF final device transistor Q6505.

Q6505 and U6501 operate from the A+ supply voltage.U6501 is switched on/off by the K9.1 line throughswitch U6502 (which connects the A+ line to pin 2 ofU6501 when transmit is enabled). The RF drive, which isrouted into transistor Q6501, is controlled from Q6506via the PA control line. The rising control voltage on thePA control line causes a rising collector voltage onQ6501. This causes more power out of the stage. Con-versely, a decreasing control line voltage decreases the

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Theory of Operation GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Synthesizer Detailed Functional Description

power delivered into the next stage. By controlling thedrive power to U6501 and the following stages in thepower amplifier lineup, ALC loop is able to regulate theoutput power of the transmitter.

The antenna switch is switched synchronously with thekeyed 9.1 voltage. In the transmit mode, this 9.1 voltageis high—turning on diodes CR6502, CR6503 and CR1.When CR6502 is turned on, it forms a low impedance tothe RF transmit path and allows the signal to pass to theantenna via harmonic filter hybrid H6502. Diode CR1 inH6502 forms a low impedance that is transformed up toan open circuit through a quarter wavelength transmis-sion line. This prevents transmitter power from beingdelivered into the receiver. Diode CR6503 is also turnedon in transmit mode further isolating the receiver fromtransmitter energy. The transmitter power from theantenna switch passes to the antenna via harmonic filterhybrid module H6502. H6502 incorporates a low passfilter, which attenuates harmonic energy out of thetransmitter to specifications level.

In receive mode, diodes CR6502, CR6403 and CR1 are alloff. The off capacitance of CR6502 is tuned by L6512 toform a high impedance network looking into the trans-mitter. Therefore, received signal energy from theantenna is channeled to the input of the receiver withminimal loss maximizing sensitivity.

A forward power detector utilizing a directional coupleris included in the harmonic filter hybrid. This forward-power detector is a microstrip printed circuit, whichcouples a small amount of the forward energy to diodeCR2 where it is rectified. This rectified signal (VFOR-WARD) forms the forward voltage which the powercontrol circuit holds constant. Holding this voltage con-stant (which is proportional to the RF rectified energyappearing across the diode) ensures the forward-powerout of the radio is held to a constant value.

Thermistor R6519 senses temperature in a location nearQ6505. This signal is fed back into the power control cir-cuit to protect Q6505 against over-temperature condi-tions.

Resistor R6520, in series with the A+ line supply, feedsvoltage to Q6505. The voltage across R6520 is monitoredand the difference voltage is channeled to the powercontrol circuit. The power control circuit monitors thevoltage drop across the resistor, which is determined bythe magnitude of the collector current in Q6505. It usesthis as a limiting mechanism whereby the power controlcircuit limits the magnitude of current that can be drawnby Q6505. This protects the device from over dissipa-tion.

Bias voltage reverse polarity protection for the transmit-ter is provided by diode CR6508. Under reverse polarityconditions to the radio, this diode conducts and protectsthe radio from damage. This diode also provides tran-sient over-voltage protection by breaking down whenthe supply voltage to the radio exceeds 24 VDC.

Power Control Circuitry

The power control circuitry consists of three mecha-nisms:

Power Set

The control loop compares the power output level tothe pre-set value. The VFORWARD voltage from theforward power detector is amplified by U701 pins 5 -7,and compared to D/A U702-2 & 4. Should a differencebe detected, an error current is generated in the loopintegrator U702-8 & 9, until equilibrium is obtained.The use of 2 D/A outputs for power set enables finetuning where pin 2 is coarse tune through resistor R703and pin 4 is fine tune through resistor R706.

Current Limit

Current to the power module U6501 (or RF final deviceQ6505) is monitored using R6520 and compared to apre-set limit D/A U702-11 and U701-(1-3). When thelimit is exceeded, an error current is generated throughdiode CR721 to the loop integrator, which lessens thePA_CNTRL line and reduces the power amplifier out-put.

Thermal Protection

When the power module U6501 (or RF final deviceQ6505) overheats, the resistance of thermistor R6519drops. Because of the voltage divider formed by R721,R725, and R6519, this resistance drop is sensed andamplified through U701-(12-14). This causes a currenterror through diode CR721 to flow into the loop inte-grator and reduce transmitted output power.

When controller U101-45, detects a voltage propor-tional to 85 degrees Centigrade through R726-727 itreduces transmit power by 50 percent during subse-quent Tx key-ups.

Synthesizer Detailed FunctionalDescription

The complete synthesizer subsystem consists of refer-ence oscillator U5700, Fractional-N Synthesizer ICU5702, two on-board voltage controlled oscillators,buffer stage U5701, and two discrete buffer amplifiersQ5707, and Q5705.

Reference oscillator U5700 contains a temperaturecompensated crystal which operates at a frequency of16.8 MHz. The output of the oscillator U5700-10 isapplied to U5702-14 via R5715 and C5733.

There are two varactor tuned VCOs. The oscillator fre-quency is controlled by the voltage applied via L5701and L5702. This control voltage ranges from 2.5 to 10.5VDC. A lower control voltage produces a lower fre-

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GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Theory of Operation

Synthesizer Detailed Functional Description

quency and a higher control voltage produces a higherfrequency respectively.

The RX/TX VCO (896 - 902MHz band) provides thefirst LO injection frequency which is 39 MHz below theRX carrier frequency and TX injection for conventionalmode. The RX/TX VCO is selected by pulling U5702-1low.

The Talk-Around (TA) VCO (935 - 941MHz band) pro-vides the transmit frequency in TA mode. The TA VCOis selected by pulling U5702-1 high.

The buffer stage U5701 and feedback amplifier Q5703provide the necessary gain and isolation for the syn-thesizer loop.

Fractional-N Synthesizer IC U5702 consists of:

• Prescaler,

• Programmable loop divider,

• Control divider logic,

• Phase detector,

• Charge pump,

• A/D Converter for low frequency digital mod-ulation,

• Balance attenuator to balance the high and lowfrequency analog modulation,

• 13-V positive voltage multiplier,

• Serial interface for control,

• Super filter for the regulated 9.3 V DC

C5712 is the super filter capacitor. The output voltageof the super filter U5702-18, drops from 9.3 VDC toabout 8.5 VDC. This filtered 8.5 VDC supplies voltagefor the VCOs, the VCO switching units U5704 & U5705,feedback amplifier Q5703, and synthesizer chargepump resistor network R5707- R5709.

The synthesizer supply voltage is provided by the 5VDC regulator U5703. The 2.1 MHz reference signal atU5702-11 is generated by dividing down the signal ofreference oscillator U5700 after it is applied to U5702-14.

In order to generate a high voltage that supplies thecharge pump output stage at VCP (U5702-32), 13 V DCis generated at pin 3 of CR5700 by the positive voltagemultiplier circuitry. This voltage multiplier is a diodecapacitor network driven by two 1.05 MHz, 180-degreeout-of-phase signals from U5702-9 &10.

The serial interface (SPI_DATA) is connected to themicroprocessor via the data line (U5702-5), clock line(U5702-6), and chip enable line (U5702-5). Proper

enabling of these lines allows the microprocessor toprogram the synthesizer.

The output of the VCO is fed to the buffer input port ofU5701-1. The output of the buffer U5701-5 is applied tothe input of the feedback amplifier Q5703 through anattenuator network consisting of R5735, R5733 andR5732. To close the synthesizer loop, the output ofQ5703 is connected to PREIN (U5702-20) of the synthe-sizer. The buffer output U5701-5 also provides the sig-nal for receiver LO injection and transmit injection line-up. The charge pump current is present at U5702-31.

The loop filter (which consists of R5716, R5717, R5734,C5750, C5744, C5745, C5736, C5746, C5747, C5794,C5795, C5796, C5797, C5798, C5799) will then trans-form this current into a voltage that will, in turn, beapplied to Vcontrol of the VCOs and steer the outputfrequency.

In order to modulate the PLL a two-point modulationmethod is utilized. The audio signal is applied to boththe A/D converter (low frequency path) as well as thebalance attenuator (high frequency path) via U5702-8.

The A/D converter will convert the low-frequency,analog modulating signal into a digital code that willin turn be applied to the loop divider. This will causethe carrier to deviate. The balance attenuator is used toadjust the VCO deviation sensitivity to high frequencymodulating signals. The output of the balance attenua-tor is present at the MODOUT port U5702-28.

The transmit injection line-up consists of two amplifierstages, Q5707 & Q5705, used to provide a constant out-put to drive the RF transmitter and provide isolation.The Q5705 stage is actively biased through Q5701, andQ5707 has passive biasing. The TX injection line-up ison only during the transmit mode (K 9.1V line is at9.1 V).

The first VCO is used for receive LO_INJ and TX_INJin the conventional 896-902 MHz transmit band. Thesecond VCO is used for TX_ INJ in the talk-around 935-941 MHz transmit band.

The VCOs get their control voltage through L5701 andL5702. Q5704 and Q5706 are the oscillation transistors.C5793, C5792 and C5785, C5784 are the oscillator feed-back capacitors. U5706 and U5707 are micro strip reso-nators. CR5701 and CR5702 are the varactors. C5790and C5782 determine the VCO KV. C5703 and C5704determine the VCO operation frequency. C5791 andC5783 are the coupling capacitors between the tankand the oscillation transistor.

The two VCOs are coupled to buffer amplifier Q5702through C5789 and C5786. The buffer amplifier outputsignal is fed to U5701-pin 1 through C5770 & R5736.

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Theory of Operation GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Controller Detailed Functional Description

Controller Detailed FunctionalDescription

General

The radio controller consists of four main subsections:

• Digital Control

• Audio Processing

• Power Control

• Voltage Regulation

The digital section consists of a microprocessor, mem-ory ICs, glue logic circuitry, signal MUX ICs, On/Offcircuit, and general purpose Input/Output circuitry.

The controller is based on the Motorola 68HC11K1microprocessor-U101, 8-Kbyte SRAM-U103, 32 Kbyte-Flash memory-U102, and 8 Kbyte EEPROM -U104.

NOTEFrom this point on, the 68HC11K1 micro-processor will be referred to as K1µP orµP.References to a Control Head will be totype P+ (Display radio).

Voltage Regulators

Voltage regulation for the controller is provided by 3separate devices: +5 VDC U631, +9.3 VDC U601, andUNSW 5V (R621 and VR621). An additional regulatoris located in the RF section.

5 VDC regulation for the digital circuitry is providedby U631. Input and output capacitors C631, C632 andC633-635 are used to reduce high-frequency noise andprovide additional charge during short battery tran-sients. This regulator provides a reset output U631-5that drops to 0 VDC when the regulator output goesout of regulation. This is used to reset the controller inorder to prevent improper operation. Diode D631 pre-vents discharge of C632 by negative spikes on the 9.3voltage.

Regulator U601 is used to generate the 9.3 VDCrequired by some audio circuits, the RF circuitry andpower control circuitry. Input and output capacitorsC601-603 and C604-605 are used to reduce high-fre-quency noise. R602-603 set the regulator output volt-age. If the voltage at U601-1 is greater than 1.3 VDC theregulator output decreases and if the voltage is lessthan 1.3 VDC, the regulator output increases. This reg-ulator output is electronically disabled by a 0 VDC sig-nal on U601-2. Q601 and associated circuitry R601,R604-605 disable the regulator when the radio isturned off.

UNSW_+5V_CL is only used by a few circuits, whichdraw low current and require 5 VDC while the radio isoff.

UNSW_+5V_CL is used to save the internal U103 RAMdata. C622 allows the battery voltage to be discon-nected for a couple of minutes without losing RAMparameters. Diode D621 prevents radio circuitry fromdischarging this capacitor.

The SW_+B voltage is monitored by the µP throughvoltage divider R641-642. Diode VR641 limits thedivided voltage to 5.1 VDC in order to protect the µP.

Diode CR6508 located in the PA section acts as protec-tion against transients and reverse polarity of the sup-ply voltage.

Electronic On/Off

The radio has circuitry which allows radio softwareand/or external triggers to turn the radio on or offwithout direct user action. This allows, for example,automatic turn-on when ignition is sensed and offwhen ignition is off.

Q611 is used to provide SW_B+ to the various radio cir-cuits. Q611 acts as an electronic on/off switch con-trolled by Q612 (the switch is on while Q612 is on).When the radio is turned on, the voltage at the base ofQ612 is high (about 0.6 V). Q612 switches on (satura-tion) and pulls down the voltage at Q611-base. Thisturns on Q611 and supplies SW_B+ to the radio. The onresistance of Q611 is very low (less than 1 OHM), so thevoltage level at SWB+ is essentially the same as A+.

The electronic on/off circuitry can be enabled by themicroprocessor (through ASFIC, B+ _CONTROL), themechanical On/Off button on the control head(ON_OFF_CONTROL), or the ignition sense circuitry(IGNITION_CONTROL). If one of the three pathscauses a low at the collector of Q612, the electronic ONprocess is engaged.

Mechanical On/Off

This refers to the typical on/off button which is locatedon the control head and turns the radio on and off.While the on/off button is turned on, line ON_OFF_CONTROL goes high during the short pulse generatedby the ON_OFF “one-shot” circuitry in the controlhead. This switches the radio on. The microprocessor isalerted through line ANALOG_ 3 which is pulled tolow by Q925 (in Control Head Model P+) while the on/off button is turned on. If the software detects a lowstate, it asserts B+_CONTROL via ASFIC-GCB2, whichkeeps Q612 and Q611 on, and in turn the radio isswitched on.

When the on/off button is turned off, the softwaredetects the line ANALOG_3 changing to low andswitches the radio off by setting B+_CONTROL to low.

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GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Theory of Operation

Controller Detailed Functional Description

Ignition

Ignition sense is used to prevent the radio from drain-ing the vehicle’s battery while the engine is not run-ning.

When the IGNITION input goes above 1.3VDC, Q450,Q612 and Q611 turn on, supplying SW_B+ to the radioand enabling U601 and U631 to supply the regulatedvoltage (+5 VDC and 9.3 VDC) to all the circuitry. TheµP starts to run the software, reads the l ineIGNITION_SENSE, determines from the level that theIGNITION input is active and sets the B+_CONTROL(via the ASFIC-GCB2) to high and latches SW_B+ on.

When the IGNITION line drops below 1.3 VDC, Q450switches off and R441 pulls line IGNITION_SENSEhigh . The sof tware i s a le r ted by l ineIGNITION_SENSE to switch off the radio by setting B+CONTROL line to low. Whenever the IGNITION linegoes above 1.3 VDC, the above process will berepeated—depending if the radio was previously on oroff.

The ignition sense capability can be disabled by turn-ing switch S401-2 & 4 on. This supplies FLT_A+ viaR452 to the ignition sense pin continuously. The radiois shipped with ignition sense disabled.

Hook

The HOOK line is used to inform the µP when theMicrophone´s hang-up switch is engaged. Dependingon the radio’s programing , the µP turns the audio PAon or off. The signal is routed from J101-3 and J400-14through transistor Q101 to the K1µP U101-23. The volt-age range of HOOK in normal operating mode is 0-5VDC.

Microprocessor Clock Synthesizer

The clock source for the controller’s microprocessorsystem is generated by the ASFIC (U201). Upon power-up the synthesizer (U5701) generates a 2.1 MHz wave-form that is routed from the RF section (via C202) to theASFIC (on U201 XTAL_IN). For the main board con-troller, the ASFIC uses 2.1 MHz as a reference inputclock signal for its internal synthesizer. The ASFIC, inaddition to audio circuitry, has a programmable syn-thesizer which can generate a synthesized signal rang-ing from 1200 Hz to 32.769 MHz with steps of 1200 Hz.

While the radio is turned on, the ASFIC generates adefault 3.6864 MHz CMOS square wave µP CLK (onU201-UPCLK) which is routed to the µP (U101-EXTAL). After the µP starts operation, it reprogramsthe ASFIC synthesizer clock to a higher µP CLK fre-quency (usually 7.3728 or 14.7456 MHz) and continuesoperation.

The ASFIC synthesizer clock is controlled by the soft-ware, and may slightly be changed while harmonics of

this clock source interfere with the specific radioreceive frequency.

The ASFIC synthesizer loop components (C228, C229and R222) set the switching time and jitter of the clockoutput. If the synthesizer cannot generate the requiredclock frequency it will switch back to its default3.6864 MHz frequency.

Serial Peripheral Interface (SPI)

The µP communicates with the other programmableICs through its SPI port. This port consists of SPITRANSMIT DATA U101-1, SPI RECEIVE DATA U101-80, SPI CLK U101-2 and chip select lines going to thevarious programmable ICs. This BUS is a synchronousbus (the timing clock signal CLK is sent with SPITRANSMIT DATA or SPI RECEIVE DATA).

In the controller section, there are three ICs on the SPIBUS: ASFIC (U201-E3), EEPROM (U104-1) and D/A(U731-6). In the RF sections, there are 2 ICs on the SPIBUS: Pendulum (Reference Oscillator U5702-24) andSynthesizer (U5701-7). The SPI TRANSMIT DATA andCLK lines going to the RF section are filtered with L131and L132 to minimize noise. The chip select lines forthe ICs are decoded by the address decoder U105.

The SPI BUS is also used for the control head. U106buffers the SPI TRANSMIT DATA and CLK lines to thecontrol head. U106 serves also to switch off the CLKsignal for the LCD display while it is not selected viaLCD_CE signal.

When the µP needs to program any of these ICs, itdrops down the chip select line of the specific IC to alogic 0 and then sends the proper data and clock sig-nals. The data sent to the various ICs are different. Forexample the ASFIC receives 21 bytes (168 bits) whilethe DAC needs 3 bytes (24 bits). After the data has beensent the chip select line is returned to a logic 1.

SBEP Serial Interface

The SBEP serial interface line allows the radio to com-municate with the Radio Service Software (RSS). Thisinterface connects to the Microphone connector (J902)via Control Head connector (J101) and comprisesBUS+ (J101-15). The line is bi-directional, meaning thateither the radio or the DPS can drive the line.

The connection from the Control Head is madethrough the BUS+ line, via L421 (SCI_RSS line) anddiode CR151 to the U101-78-RxD and U101-79-TxDports.

Microprocessor (Open Controller)

For this radio, the K1µP is configured to operate in theexpanded or bootstrap modes. In expanded mode theK1µP uses external memory ICs, whereas in bootstrapmode it uses only its internal memory. In normal radio

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Controller Detailed Functional Description

operation, the K1µP is operating in the expandedmode.

In the radio expanded mode, the K1µP (U101) hasaccess to three external memory ICs: U102 (Flash mem-ory), U103 (SRAM), U104 (EEPROM). Also, within theK1µP there are 768 bytes of internal RAM and 640 bytesof internal EEPROM, as well as glue logic circuitry toselect external memory ICs.

The external EEPROM (U104) as well as the K1µP’sown internal EEPROM contain the radio informationwhich is customer specific, referred to as the codeplug.This information consists of items such as: 1) frequencyoperating band, 2) channel frequencies, and 3) generaltuning information. General tuning information andother more frequently accessed items are stored in theinternal EEPROM (within the 68HC11K1), while theremaining data is stored in the external EEPROM. (Seethe particular IC subsection for more details.)

The external SRAM (U103) as well as the K1µP’s owninternal RAM are used for temporary calculationsrequired by the software during normal radio opera-tion. All of the data stored in both of these locations islost when the radio is powered off. (See the particularIC subsection for more details.)

The Flash memory contains the actual Radio OperatingSoftware. This software is common to all radios for thesame model type. For example, Privacy Plus modelshave a different version of software in Flash memorythan an LTR model. (See the particular IC subsectionfor more details.)

The K1µP has an address bus of 16 address lines (A0-A15), a data bus of 8 data lines (D0-D7). and three con-trol lines; CSPROG (U101-29) to select U102-30 (OTPmemory), CSGP2 (U101-28) to select U103-20 (SRAM)and PG7_R_W for read and write. All other chips(ASFIC/PENDULLUM/DAC/FRACN/LCD/LED/EEPROM) are selected by 3 lines of the K1µP usingchip select decoder U105. When the K1µP is function-ing normally, the address and data lines should bewithin CMOS logic levels.

The low-order address lines (A0-A7) and the data lines(D0-D7) should change.

On the K1µP the lines XIRQ (U101-30), MODA LIR(U101-77), MODB VSTPY (U101-76) and RESET (U101-75) should be logic high during all normal K1µP oper-ation. Whenever a data or an address line becomesunloaded or shorted to an adjacent line, a commonsymptom is that short negative pulses occur on theRESET line, with a period of 20 msec. When two linesare short-circuited, mid logic level (around 2.5 V) maybe observed, while these lines are opposite driven bytwo different ICs.

The MODA LIR (U101-77) and MODB VSTPY(U101-76) inputs to the K1µP must be at a logic 1 level

for proper operation. After the K1µP starts execution, itwill periodically pulse these lines to determine thedesired operating mode. While the Central ProcessingUnit (CPU) is running a new instruction, MODA LIR(as an open-drain CMOS output) drops low.

However, since it is an open-drain output, the signalwaveform rise has an exponential shape, like an RC cir-cuit.

The µP has eight analog-to-digital converter ports (A/D): PE0 to PE7. These lines may measure voltage levelsin the range of 0 to 5 VDC and convert that level to anumber ranging from 0 to 255 which can be read by thesoftware to take appropriate action.

For example, U101-46 is the battery voltage detect line.R641 and R642 form a resistor divider on SW_B+. With47.5K and 16.2 K and a voltage range of 11 V to 17 V, theA/D port would see 2.74 V to 4.24 V which would thenbe converted to a digital value in the range of 140 to 217respectively.

U101-51 is the high reference voltage for the A/D portson the K1µP. Resistor R106 and capacitor C106 filter the+5 VDC reference. If this voltage is lower than +5 VDCthe A/D readings will be incorrect. Likewise U101-50is the low reference for the A/D ports. This line is nor-mally tied to ground. If this line is not connected toground, the A/D readings will be incorrect.

Capacitors C104, C105 serve to filter out any AC noisewhich may ride on +5VDC at U101.

One-Time Programmable (Flash) Memory

The 32-KByte Flash memory (U102) contains theradio’s operating software. This memory is read-only.The memory access signals (EN_CE, EN_OE andEN_WE) are generated by the µP.

Capacitor C131 serves to filter out any AC noise whichmay ride on +5V at U101, and C132 filters out any ACnoise on Vpp.

Electrically Erasable ProgrammableMemory (EEPROM)

EEPROM (U104) contains the radio’s operating param-eters such as operating frequency and signalling fea-tures, commonly known as the codeplug. It is also usedto store radio operating state parameters such as cur-rent mode and volume. U104 is a 8 Kbyte device. Thismemory can be written to in excess of 100,000 timesand will retain the data when power is removed fromthe radio. The memory access signals (SI, SO and SCK)are generated by the K1µP and chip select (CS_) is gen-erated by address decoder U105.

Additional EEPROM is contained in the K1µP (U101).This EEPROM is used to store radio tuning and align-ment data. Like the external EEPROM this memory can

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Controller Audio & Signaling Circuits

be programmed multiple times and will retain the datawhen power is removed from the radio.

NOTEThe external EEPROM plus the 640 bytesof internal EEPROM in the 68HC11K1comprise the complete codeplug.

Static Random Access Memory (SRAM)

The SRAM (U103) contains temporary radio calcula-tions or parameters that can change very frequently,and which are generated and stored by the softwareduring its normal operation. The information is lostwhen the radio is turned off. The device allows anunlimited number of write cycles. SRAM accesses areindicated by the EN_CS signal U103-20 (which comesfrom U101-28) going low. U103 is commonly referredto as the external RAM as opposed to the internal RAMwhich is the 768 bytes of RAM which is part of the68HC11K1. Both RAM spaces serve the purpose. How-ever, the internal RAM is used for the calculated valueswhich are accessed most often. Capacitor C133 servesto filter out any AC noise which may ride on +5VDC atU103.

Control Head

Control Head is available for user interface. The Con-trol Head contains the internal speaker, the micro-phone connector, several buttons to operate the radioand several indicator LEDs to inform the user aboutthe radio status. Additionally Control Head uses a 3digit LCD (Liquid Crystal Display) for the channelnumber.

When turned on, the On/Off switch turns the voltageregulators on by pulling ON_OFF_CONTROL to highand connects the base of Q925(P), Q825(K) to FLT_A+.This transistor pulls the line ANALOG_3 to low toinform the µP that the On/Off button is pressed. If theradio is switched off, the µP will switch it on and viceversa. All other buttons work the same way. If a buttonis pressed, it will connect one of the 3 lines ANALOG_1,2,3 to a resistive voltage divider connected to +5VDC.The voltages of the lines are A/D converted inside theµP and specify the pressed button.

All the back light and indicator LEDs are driven by cur-rent sources and controlled by the µP via SERIALPERIPHERAL INTERFACE (SPI) interface. The LEDstatus is stored in shift register U941(P). Line LED CEenables the serial write process via Q941(P), while lineLED CLCK BUF shifts the data of line SPI DATA BUFinto the shift register.

In addition Control Head contains the LCD H931, thedisplay driver U932 and a transistor Q953 to switch thedisplay driver on and off. Q953 is controlled by the µPvia shift register U941, The display data of line SPI

DATA BUF is shifted into the display driver by clocksignal LCD CLCK BUF.

Controller Audio & SignalingCircuits

General

Audio Signalling Filter IC (ASFIC)

The ASFIC (U201) used in the controller has four func-tions;

• RX/TX audio shaping, i.e. filtering, amplifica-tion, attenuation

• RX/TX signalling, PL/DPL/HST/LST

• Squelch detection

• Microprocessor clock signal generation (seeMicroprocessor Clock Synthesizer DescriptionBlock).

The ASFIC is programmable through the SPI BUS(U201-E3/F1/F2), normally receiving 21 bytes. Thisprogramming sets up various paths within the ASFICto route audio and/or signalling signals through theappropriate filtering, gain and attenuator blocks. TheASFIC also has 6 General Control Bits GCB0-5 whichare CMOS level outputs. They are used for AUDIO_PA _ENABLE (GCB0) to switch the audio PA on andoff, EXTERNAL_ALARM (GCB1) to toggle theEXTERNAL_ALARM pin on the accessory connectorJ400-4, B+_CONTROL (GCB2) to switch the voltageregulators (and the radio) on, HIGH_LOW_BAND(GCB4) to enab le/disba le HearClear andFAST_OFF_IGN (GCB5) which forces the radio-onlatch to the off condition. GCB3 is not used.

Audio Ground

VAG is the dc bias used as an audio ground for the op-amps that are external to the Audio Signalling Filter IC(ASFIC). U251 forms this bias by dividing 9V3Vwithresistors R251, R252, and buffering the 4.65 VDC resultwith a voltage follower. VAG emerges at pin 1 of U251.C235 is a bypass capacitor for VAG. The ASFIC gener-ates its own 2.5V bias for its internal circuitry. C221 isthe bypass for the ASFIC’s audio ground dc bias.

NOTEWhile there are ASFIC VAG, and BOARDVAG (U201-1), each of these are sepa-rated. They are not connected together.

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Controller Audio & Signaling Circuits

Transmit Audio Circuits.

Mic Input Path

The radio provides two microphone inputs, one on thecontrol head (internal mic audio) routed through J101-16), and one on the accessory connector J400-2 (exter-nal mic audio). The two inputs are connected in paral-lel. The dc bias required by the microphone is providedby resistor R205, derived from the 9V3 source and fil-tered by R204 and C209. The microphone audio signalis applied via R206 and C211, to the ASFIC at U201-B8.

Filter capacitor C210 provides low-pass filtering toeliminate frequency components above 3 kHz, andC211 serves as a DC blocking capacitor. The audio sig-nal at U201-B8 should be approximately 80mV for 60%of full system deviation.

Flat Tx Audio Input Path

The FLAT_TX_AUDIO signal from accessory connec-tor J400-5 is buffered by op-amp U202-(1-3) and fed viaC205 to the ASFIC U201-D7.

PTT Sensing and TX Audio Processing

MIC PTT is sensed by the µP. PTT can also be generatedby grounding pin 3 on the radio accessory connector,J400. When microphone PTT is sensed, the µP willalways configure the ASFIC to enable the mic audio

path. PTT can be configured to enable the EXT_MICaudio path when J400-2 is connected with an externalmic audio input. Data PTT is configured to enable theflat transmit audio path (when J400-5 is configured forFLAT_TX_AUDIO).

Inside the ASFIC, the mic audio is filtered to eliminatecomponents outside the 300-3000Hz voice band andpre-emphasize. The capacitor, C231, between ASFICpre-emphasis out U201-C8 and ASFIC limiter in U201-E8 AC couples the signal between ASFIC blocks andprevents the DC bias at the ASFIC output U0201-H8from shifting when the ASFIC transmit circuits areenabled. The signal is then limited to prevent the trans-mitter from over deviating. The limited mic audio isthen routed through a summer which is used to add insignalling data, and then to a splatter filter to eliminatehigh frequency spectral components that could be gen-erated by the limiter. The audio is then routed to theVCO attenuator, which is tuned in the factory or thefield to set the proper amount of FM deviation. The TXaudio emerges from the ASFIC at U201-H8 MOD IN,and is routed to the RF section as MOD IN.

Transmit Signalling Circuits

See Figure 8-4 for reference for the following sections.From a hardware point of view, there are three types ofsignalling:

Figure 8-3. Transmit Audio Paths

TO RF

C7A6

E8C8

J400

ACCESSORY

J101

CONTROL HEAD

MIC

EXT MIC

FLAT TX D75

B8

16

2

FILTERS &

LS SUMMER

SPLATTER

HS SUMMER

LIMITERATTENUATOR

VCO

TX INMIC AMP OUT

MIC IN

AUX TX IN

PRE EMP OUT LIM IN

ASFIC U201

MOD IN

PREEMPHASIS

CONNECTOR

CONNECTOR

FILTER

ATN

SECTION(SYNTHESIZER)

AUDIO

D3

F3

COMP BUF IN

HEARCLEAR IC U350

COMP OUT

HPF

H8

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Controller Audio & Signaling Circuits

• Sub-audible data (PL/DPL/LST/Connect tone)that gets summed with transmit voice or signal-ling,

• DTMF data for telephone communication intrunked and conventional systems, and

• Audible signalling High speed Trunking.

NOTEThe hardware supports all three typeswhile the radio software determineswhich signalling type is available.

Sub-audible Data (PL/DPL)

Sub-audible data implies signalling whose bandwidthis below 300Hz. PL and DPL waveforms are used forconventional operation and connect tones for trunkedvoice channel operation. The trunking connect tone issimply a PL tone at a higher deviation level than PL ina conventional system. Although it is referred to as“sub-audible data,” the actual frequency spectrum ofthese waveforms may be as high as 250 Hz, which isaudible to the human ear. However, the radio receiverfilters out any audio below 300Hz, so these tones arenever heard in the actual system.

Only one type of sub-audible data can be generated byU201 (ASFIC) at any one time. The process is as fol-lows, using the SPI BUS, the µP programs the ASFIC toset up the proper low-speed data deviation and selectthe PL or DPL filters. The µP then generates a squarewave which strobes the ASFIC PL/DPL encode inputPL CLK U201-C3 at twelve times the desired data rate.For example, for a PL frequency of 103 Hz, the fre-quency of the square wave would be 1236 Hz.

This drives a tone generator inside U201 which gener-ates a staircase approximation to a PL sine wave or

DPL data pattern. This internal waveform is then low-pass filtered and summed with voice or data. Theresulting summed waveform then appears on U201-H8 (MOD IN), where it is sent to the RF board as pre-viously described for transmit audio. A trunking con-nect tone would be generated in the same manner as aPL tone.

High Speed Data

High speed data refers to the 3600 baud data wave-forms, known as Inbound Signalling Words (ISWs)used in a trunking system for high speed communica-tion between the central controller and the radio. Togenerate an ISW, the µP first programs the ASFIC(U201) to the proper filter and gain settings. It thenbegins strobing U201-G1 (TRK CLK IN) with a pulsewhen the data is supposed to change states. U201’s 5-3-2 State Encoder (which is in a 2-state mode) is thenfed to the post-limiter summer block and then thesplatter filter.

From that point it is routed through the modulationattenuator and then out of the ASFIC to the RF board.Microphone audio is muted during High Speed Datasignalling.

Dual Tone Multiple Frequency (DTMF) Data

DTMF data is a dual tone waveform used duringphone interconnect operation. It is the same type oftones which are heard when using a “Touch Tone” tele-phone.

There are seven frequencies, with four in the low group(697, 770, 852, 941Hz) and three in the high group(1209, 1336, 1477Hz).

The high-group tone is generated by the µP (U101-5)strobing U201-G1 at six times the tone frequency for

G1

C3

G2

H8

MOD IN

TO RF SECTION

6

7

5 HIGH SPEED

CLOCK IN

LOW SPEED

CLOCK

DTMF

CLOCK

ASFIC U201

MICRO

U101

HS

5-3-2 STATE

DTMF

SPLATTER

PL/DPL/LST LS

ATTENUATOR

CONTROLLER

FILTER

SUMMER

SUMMER

ENCODER

ENCODER

ENCODER

(SYNTHESIZER)

Figure 8-4. Transmit Signalling Paths

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Controller Audio & Signaling Circuits

tones less than 1440Hz or twice the frequency for tonesgreater than 1440Hz. The low group tone is generatedby the µP (U101-7) strobing U201-G2 (DTMF CLCK) atsix times the tone frequency. Inside U201 the low-group and high-group tones are summed (with theamplitude of the high group tone being approximately2 dB greater than that of the low group tone) and thenpre-emphasized before being routed to the summerand splatter filter. The DTMF waveform then followsthe same path as was described for high-speed data.

Receive Audio Circuits

Squelch Detect

The radio’s RF circuits are constantly producing anoutput at the discriminator (U5201-28). This signal

DET_AUDIO is routed to the ASFIC’s squelch detectcircuitry input SQIN (U201-H7). All of the squelchdetect circuitry is contained within the ASFIC. There-fore from a user’s point of view, DET_AUDIO entersthe ASFIC, and the ASFIC produces two CMOS logicoutputs based on the result. They are CHACT(U201-H2) and SQDET (U201-H1).

The squelch signal entering the ASFIC is amplified, fil-tered, attenuated, and rectified. It is then sent to a com-parator to produce an active high signal on CHACT. Asquelch tail circuit is used to produce SQDET(U201-H1) from CHACT. The state of CHACT and SQDET is high (logic 1) when carrier is detected, other-wise low (logic 0).

CHACT is routed to U101-25 while SQDET adds upwith LOCK_DET, weighted by resistors R113 and R114,

Figure 8-5. Receive Audio Paths

J40011

161

EXT RX AUDIO

EXTERNAL

INTERNAL

ACCESSORY CONNECTOR

CONTROL HEAD CONNECTOR

HANDSET14

1

2J101

INT

SPKR+SPKR-

1

9

ATTEN.

H6

J7

DET AUDIO

H7

J4

INT

4

6

RX IN

PL IN

SQ IN

ASFIC U201

AUDIO

VOLUME

FILTER &

H1

MICRO 10

FROM

LIMITER, RECTIFIER

SQ DET

UNAT RX OUT

SQUELCH

H2

PL FILTER

CH ACT

EXP AUDIO INJ5

A4PL

H5RX AUD OUT

25 68

SPEAKER

SPEAKER

AUDIO

DEEMPHASIS

ATTEN.

RF SECTION(IFIC)

(DISCRIMINATOR AUDIO)

FILTER, COMPARATOR CIRCUIT

CONTROLLERU101

LIMITER

SPKR+ SPKR-

PA

U401

LIM

F4FF OUT

EXP OUT

C1EXP IN

HEARCLEARU350

A2

E4FFIN

13 INT SPKR+ JUMPER

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Controller Audio & Signaling Circuits

and is routed to an A/D converter input U101-43. Fromthe voltage weighted by the resistors the µP deter-mines whether SQDET, LOCK_DET or both are active.

SQDET is used to determine all audio mute/unmutedecisions except for Conventional Scan. In this caseCHACT is a pre-indicator as it occurs slightly fasterthan SQDET.

Audio Processing and Digital Volume Control

The receiver audio signal enters the controller sectionfrom the IF IC (U5201-28) on DET_AUDIO and passesthrough RC filter R203 and C208 which filters out IFnoise. The signal is AC coupled by C207 and enters theASFIC via PLIN U201-J7.

Inside the ASFIC, the signal goes through two paths inparallel, the audio path and the PL/DPL path.

The audio path has a programmable amplifier, whosesetting is based on the channel bandwidth beingreceived, then a LPF filter to remove any frequencycomponents above 3000Hz and then an HPF to strip offany sub-audible data below 300Hz. Next, the recov-ered audio passes through a De-emphasis filter to com-pensate for Pre-emphasis which is used to reduce theeffects of FM noise. The IC then passes the audiothrough the 8-bit programmable attenuator whoselevel is set depending on the value of the volume con-trol. Finally the filtered audio signal passes through anoutput buffer within the ASFIC. The audio signal exitsthe ASFIC at RX_AUDIO (U201-J4).

The µP programs the attenuator, using the SPI bus,based on the volume setting. The minimum /maxi-mum settings of the attenuator are set by codeplugparameters.

Since sub-audible signalling is summed with voiceinformation on transmit, it must be separated from thevoice information before processing. Any sub-audiblesignalling enters the ASFIC from the IF IC at PLINU201-J7. Once inside it goes through the PL/DPL path.

The signal first passes through one of 2 low pass filters,either PL low pass filter or DPL/LST low pass filter.Either signal is then filtered and goes through a limiterand exits the ASFIC at PLLIM (U201-A4). At this pointthe signal will appear as a square wave version of thesub-audible signal which the radio received. Themicroprocessor, U101-10 will decode the signal directlyto determine if it is the tone/code which is currentlyactive on that mode.

Audio Amplification Speaker (+) Speaker (-)

The ASFIC’s received audio signal output, U201-J4, isrouted through a voltage divider formed by R401 andR402 to set the correct input level to the audio PA(U401). This is necessary because the gain of the audioPA is 46 dB, and the ASFIC output is capable of over-driving the PA unless the maximum volume is limited.

The audio then passes through C401 which providesAC coupling and low frequency roll-off. C402 provideshigh frequency roll-off as the audio signal is routed topins 1 and 9 of the audio power amplifier U401.

The outputs of the Audio PA (U401 pins 4 and 6) arerouted to the external speaker via the accessory con-nector (J400-16 EXT SPKR+, and J400-1 EXT SPKR-,respectively). One terminal of the radio’s internalspeaker (+) is connected to J400-13 (INT SPKR+), andthe other (-) to U401-6. To enable the internal speaker, ajumper plug is inserted into J400 which connects pins13 and 16 together. This completes the path betweenthe audio power amp U401-4 and the internalspeaker’s (+) terminal.

The audio power amplifier has one inverted and onenon-inverted output that produces the differentialaudio output OUT1 and OUT2 (U401-4 & 6). Theinputs for each of these amplifiers are pins 1 and 9respectively; these inputs are both tied to the receivedaudio. The audio PAs DC bias is not activated until theaudio PA is enabled at pin 8.

The audio PA is enabled via AUDIO_PA_ENABLE sig-nal from the ASFIC (U201-B5). When the base of Q401is low, the transistor is off and U401-8 is high, usingpull up resistor R406, the audio PA is ON. The U401-8must be above 8.5VDC to properly enable the device. Ifthe voltage is between 3.3 and 6.4V, the device will beactive but has its input (U401-1/9) off. This is a mutecondition which is not employed in this radio design.R404 ensures that the base of Q401 is high on powerup. Otherwise there may be an audio pop due to R406pulling U401-8 high before the software can switch onQ401.

The audio PA can also be muted externally when in theData Modem mode, which is selected by turningswitch S401 (1-3) off. This forces analog switch controlline U402-9 high via R442, changing its state. If J400-12is pulled low, this is transferred via pins 14 and 1 ofU402 to the base of Q415, turning it on and, in turn,Q401 on. This pulls U401-B low, muting the audio PA.

The EXT_SPKR+ and EXT_SPKR- outputs of the audioPA have a DC bias which varies proportionately withFLT A+ (U401-7). FLT A+ of 11V yields DC offset of 5V,and FLT A+ of 17V yields a DC offset of 8.5V. If eitherof these lines is shorted to ground, it is possible that theaudio PA will be damaged. The audio PA containsinternal short-circuit protection, however this situationshould be avoided. EXT_SPKR+ and EXT_SPKR- arerouted to the accessory connector (J400-16 & 1) and, viathe jumper plug connecting J400-16 to 13, to the controlhead (connector J101-1 & 2).

Handset Audio

Certain hand-held accessories have a speaker withinthem which require a different voltage level than thatprovided by U401. For those devices HANDSET

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Controller Audio & Signaling Circuits

AUDIO is available at control head microphone jackJ903-8.

The received audio from the output of the ASFIC’s dig-ital volume attenuator (U201-J4) is also routed toU202-9 where it is amplified 15 dB; this is set by the10k/68k combination of R233 and R232. This signal isrouted from the output of the op amp U202- 8 to J101-14. The control head sends this signal directly out to themicrophone jack. The maximum value of this output is6.6Vp-p.

External Rx Audio

RX Audio is also routed to the accessory connectorJ400-11. This audio level is fixed and not affected by thesetting of the digital volume attenuator. The source ofthis audio is selectable as follows:

In the Data Modem mode (switch S401, 1-3 off), U402-9 is high, and FLAT_ RX_AUDIO, directly from detec-tor U5201-28 via C230 and R236, is routed from U402pin 10 to pin 5, amplified by U403 and applied to J400-11 via R419 and C419.

In Normal mode (switch S401 1-3 on), U402-9 is low,and GATED_RX_AUDIO, from ASFIC U201-H5 viaC237 and R235, is routed from U402 pin 6 to pin 5,amplified by U403 and applied to J0400-11 via R419and C419. The values of R235 and R236 provide thecorrect audio levels for GATED and FLAT_RX_AUDIO paths, respectively. The GATED_RX_AUDIOsignal is PL-filtered, de-emphasized, and controlled bythe squelch mute gate. The FLAT_ RX_AUDIO signal isnon-de-emphasized, unmuted, and is flat between

0.6 Hz and 3 kHz. The radio is shipped configured forNormal mode operation.

Receive Signalling Circuits

Sub-audible Data (PL/DPL) and High Speed DataDecoder

The ASFIC (U201) is used to filter and limit all receiveddata. The data enters the ASFIC at U201-J7. Inside U201the data is filtered according to data type (HS or LS),then it is limited to a 0-5V digital level. The trunkinghigh speed data appears at U201-G4, where it connectsto the µP U101-11.

The low speed limited data output (PL, DPL, and LST)appears at U201-A4, where it connects to the µP U101-10. While receiving low speed data, the µP may outputa sampling waveform depending on the samplingtechnique to U201-C3 between 1 and 2 kHz.

The low speed data is read by the µP at twice the fre-quency of the sampling waveform; a latch configura-tion in the ASFIC stores one bit every clock cycle. Theexternal capacitors C223, C225, and C226 set the lowfrequency pole for a zero crossings detector in the lim-iters for PL and HS data. The hysteresis of these limit-ers is programmed based on the type of received data.

NOTEDuring HS data, the µP may generate asampling waveform seen at U0201-G1.

DET AUDIO

G4

A4

C5 J3

G1 C3

J7

11

10

6 5LOW SPEED

PLIN

RX LIM

PL

RX

LOW SPEED

HIGH SPEED

DATA FILTERLIMITER

FILTER LIMITER

ASFIC U201

MICRO

U101

DISCRIMINATOR AUDIOFROM RF SECTION(IFIC)

CLOCK CLOCK

& DEEMPHASIS

CONTROLLER

LIM

CAPLIM CAP

LIMOUT

Figure 8-6. Receive Signalling Path

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GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Theory of Operation

Controller Audio & Signaling Circuits

Alert Tone Circuits

When the software determines that it needs to give theoperator an audible feedback (for a good key press, orfor a bad key press), or radio status (trunked systembusy, phone call, circuit failures), it sends an alert toneto the speaker.

It does so by sending SPI BUS data to U201 which setsup the audio path to the speaker for alert tones. Thealert tone itself can be generated in one of two ways:internally by the ASFIC, or externally using the µP andthe ASFIC.

The allowable internal alert tones are 304, 608, 911, and1823Hz. In this case a code contained within the SPIBUS load to the ASFIC sets up the path and determinesthe tone frequency, and at what volume level to gener-ate the tone. (It does not have to be related to the voicevolume setting).

For external alert tones, the µP can generate any tonewithin the 100-3000Hz audio band. This is accom-plished by the µP generating a square wave whichenters the ASFIC at U201-C3.

Inside the ASFIC, this signal is routed to the alert tonegenerator; the output of the generator is summed intothe audio chain just after the RX audio de-emphasisblock. Inside U201 the tone is amplified and filtered,then passed through the 8-bit digital volume attenua-tor, which is typically loaded with a special value foralert tone audio. The tone exits at U201-J4 and is routedto the audio PA like receive audio.

Hear Clear IC

Hear Clear (HC) is used for 900 MHz radios. The HChas three functions within the IC which are used by theradio: 1) Compressor, 2) Flutter Fighter, and 3)Expander Circuits. There are six enable/control lineson the Hear Clear IC which determine its mode ofoperation. The IC ENAB line U350-C4 is tied to 9.3 sowhenever the IC is placed on the board, it is alwaysactive. The remaining five lines are contolled by theASIFIC General Control Bit Line. Table 8.1 below sum-marizies the logic control and the IC states.

Transmit Path for Radios with Hear Clear

For transmit, the audio signal comes from the appro-priate microphone and enters the ASFIC at U200-B8.After entering the ASFIC, the signal is internallyrouted to U200-A6 ASFIC MIC AMP OUT, where itleaves the ASFIC and enters the Hear Clear compressorat U350-D3. The signal then exits the compressor atU350-F3, where it is routed back to the ASFIC U200-C7.C361 provides AC coupling. Inside the ASFIC, the sig-nal goes through LPF and HPF that limits the signalbetween 0.3-3 kHz . The signal is then pre-emphasizedand exits the ASFIC at U200-C8 and enters the ASFICat U200-E8. Again inside the ASFIC, the signal goes

through a limiter, splatter filter, and an attenuatorwhich sets the amplitude (deviation level) of the signal.

The purpose of having a compressor in the transmitmode is twofold: 1) improve S/N ratio for low levelaudio, and 2) maintain the same dynamic range of12.5 kHz bandwidth channel as obtained in the 25 KHzbandwidth.

The compresssor raises low level signals and lowershigh level signals. The compressor circuit produces asignal whose output voltage at pin U350-F3 is based onthe input voltage level (0200-A6) of the signal. Thevoltage transfer function is:

• 20 mV input == 40 mV output

• 80 mV input == 80 mV output

• 50 mV input == 110 mV output

Receive Path for Radios with Hear Clear

The audio signal enters the Hear Clear controller fromBBR signal on DISC. The discriminated audio “DISC”enters the Hear Clear Flutter Fighter through C300 andC367. C300 connects the signal to FF IN (U350-E4).C367 is a beginning of a noise sampling circuit consist-ing of components: C367, R356, R353, C364, C363, R354and R355, R357, and C365; and Hear Clear ports Ref,Noise Filter In, and Noise Filter Out, Noise Hold.

After exiting Hear Clear at the “FF OUT” (U350-F4),the signal enters ASFIC at RX IN (U200-H6). Within theASFIC, the signal passes through a low filter and highpass filter limiting the audio band width to 0.3-3 kHz.It then goes through de-emphasis and exits the ASFICat U200-H5 FILTERED AUDIO.

After exiting the ASFIC at FILTERED AUDIO, the sig-nal passes through capacitor C350, which provides ACcoupling. The signal then enters the HEAR CLEAR atEXP IN (U350-C1) and exits the HEAR CLEARExpander at EXP OUT (U350-A2). The normalized sig-nal is then routed back to the ASFIC through C360 forvolume adjustment, entering at U200-J5 and exiting theASFIC at U200-J4 as RX AUDIO. The audio is trhenrouted to the Audio PA in the same manner as stan-dard receive audio.

The purpose of Flutter Fighter is to sample the amountof Noise in the receive audio between 10 - 20 Khz usingthe Noise Filter in (U350-B5, Noise Filter Out (U350-C6) and Noise Hold (U350-D5). In addition, it monitorsthe rate of change of RSSI (Receive Signal Strength In)(U350-F5). The discriminated audio DISC enters intothe Hear Clear Ic at ”FF IN” (U350-E4). The circuit thenreduces the amount of popping Noise associated withfading. The improved audio exits the IC at ”FFOUT”(U350-F4).

The expander is used after de-emphasis but before theASFIC volume attenuation. The purpose of the

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Theory of Operation GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Controller Audio & Signaling Circuits

expander is to transpose the compressed audio back to“normal” audio. As with the compressor circuit, theexpander circuit adjusts the amplitude of a signalbased upon its input amplitude, NOT its frequency.

The vol tage transfer funct ion is : EXPOUT=0.41*(EXPIN/0.28)2.

Example :

100 mV EXPIN == 52 mV EXPOUT

191 mV EXPIN == 191 mV EXPOUT

250 mV EXPIN == 327 mV EXPOUT

NOTEThis operation is NOT a function of fre-quency between 300 Hz and 3 kHz .

Hear Clear Routing of Data/Signalling

While transmitting, all data and signalling bypassesthe Hear Clear Compressor.

While receiving, subaudible signals PL/DPL gothrough the Flutter Fighter along with the audio, and isunaffected by the Flutter Fighter operation. On enter-ing the ASFIC, the sub-audible signaling is separatedfrom the voice and decoded. Sub-audible signalingnever goes through the expander.

While receiving, data and high speed signalling (notsub-audible), the Flutter Fighter is set to “pass throughmode”. In this mode, the Flutter Fighter is routed from“FF IN” to “FF OUT” without any adjustment.

Accessory Connector Configurations

The configuration of the pins of accessory connectorJ400 can be changed to support different accessories bychanging the settings of dual switch S401.

S401 (pins 2-4) is turned ON if external Ignition Senseis not used, and turned OFF if an external IgnitionSense cable is installed. The operation of the IgnitionSense circuitry is described above in the “ElectronicOn/Off” and “Ignition” sections of the ControllerDetailed Functional Description.

S401 (pins 1 and 3) is turned ON to support RemoteDesk Set, Public Address and External Alarm, and isturned OFF to configure the accessory connector forExternal Data Modem applications.

NOTEThe radio is shipped with Ignition Sensedisabled. and Remote Desk Set, PublicAddress and External Alarm enabled.

Remote Desk Set

For Remote Desk Set applications, switch S401 (1-3)should be ON. This pulls the analog switch control lineU402-9 low, and the switch positions of U402 are asshown in the schematic. The PTT signal from the deskset at U400-3 is routed via U402-4 and 2 and via U203 -1 and 2 (U203 is ON since pin 4 is high via R433 andR431) to µP port U101-22. The hook signal at U400-14 isinverted by Q101 and applied to µP port U101-23.Transmit audio at U400-2 (EXTERNAL_MIC_ AUDIO)is connected in parallel with the front panel mic audioinput and applied to ASFIC U201-B8. DC bias requiredby microphone is provided by R204 and R205.GATED_RX_AUDIO which is de-emphasized andcontrolled by the squelch mute gate is obtained from

Table 8-1. Hear Clear Enable Lines Configuration

LogicState

Name Ref. Des Set By TX1 RX1 TX2 RX2

IC Enable UC350-C4 9V3 1 1 X

Flutter Fighter Enable UC350-E3 U000-A2 X 1 X 0

LO Clamp Disable UC350-A5 U200-A2 1 1 1 X

LO Clamp Disable UC350-C2 U200-A2 0 0 X 0

HCI Disable UC350-B6 U200-A2 1 1 X 1

LO Clamp Disable UC350-D1 U200-A2 0 0 X 0

TX1: transmit mode with carrier squelch, PL or DPL

RX1: receive voice with carrier squelch, PL or DPL

TX2: transmit mode with all other data HST/MDC/DTMF etc.

RX2: refers to receive mode with all other data HST/MDC/DTMF

Logic State “X” means either 1 or a 0, i.e. ‘don’t care”.

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GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Theory of Operation

Controller Audio & Signaling Circuits

ASFIC U201-H5, buffered and amplified by U403 andsent to the desk set at J400-11.

Public Address

Public address operation requires an accessoryHLN9322 Public Address Switch Box and one or moreHSN1000 amplified speakers. In the Public Addressmode, the radio functions simply as a junction boxwhich routes microphone audio from the front panelconnector directly to the switch box via J400-2, where itis further amplified and routed to the amplified speak-ers. Additionally, the microphone PTT does not key thetransmitter, and the microphone off-hook condition isignored, appearing to be on-hook.

For Public Address operation, switch S401 (1-3) shouldbe ON. This pulls the analog switch control line U402-9low, and the switch positions of U402 are as shown inthe schematic. When Public Address mode is turnedon using the Switch Box, the switch box pulls J400-12low. This signal is passed through switch U402 frompin 14 to 15, which also goes low. The hook line ispulled low by D401, forcing the microphone to appearon-hook. The control line to gate U203-4, normallyhigh via R433, is pulled low, turning off U203 and pre-venting MIC PTT from being applied to the µP. Thus,microphone audio is routed to the public addressspeakers but the radio does not transmit, and receiveroperation is maintained in the same condition it waswhen the microphone was on-hook.

SW_B+ from J400-9 is supplied to the switch box,where it powers the internal amplifier stages and alsoturns on a rely which applies battery voltage to theexternal amplified speakers. Thus, when the radio isturned off, all PA circuits and amplified speakers areturned off as well.

External Alarm

For External Alarm installations, switch S401 (1-3)should be ON. This pulls the analog switch control lineU402-9 low, and the switch positions of U402 are asshown in the schematic. When the radio’s alarm modeis enabled and the proper code has been received,ASFIC port U201-A3 goes high, turning on Q411 viaU402-(11-13) and R411, saturating Q411 and pullingJ400-4 low.

For External Alarm installations, switch S401 (1-3)should be OFF. This pulls the analog switch control lineU402-9 high via R442, and the switch positions of U402are the opposite from those shown in the schematic.

Data Modem

For Data Modem installations, switch S401 (1-3) shouldbe OFF. This pulls the analog switch control line U402-9 high and the switch positions of U402 are thrownopposite of that shown in the schematic.

NOTEAll Data Modem I/O functions are activelow, 0 VDC.

The reconfigured pin functions of accessories connec-tor J400 are as follows:

J400-12 is an input to the radio which allows the datamodem to mute the radio’s speaker audio while databursts are being received. The modem pulls J400-12low, which is routed through switch U402 from pin 14to 1, and turns on Q415 and, therefore, Q401. This pullsU401-8 low, muting the audio power amplifier.

J400-4 is an output from the radio which tells themodem that the radio is transmitting by pulling J400-4low. Two non-simultaneous conditions are summed torecognize transmit mode under all timing conditions.If PTT is low, Q410 is off and a high is provided viaR440, D403, U402 pins 12-13, and R411, to turn on Q411and pull J400-4 low. If the transmit-enable voltageK9V1_ENABLE is high, a high is provided via D403,U402 pins 12-13, and R411, to turn on Q411 and pullJ0400-4 low.

J400-15 provides system busy indication by observingthe status of the AUDIO_PA_ENABLE line, which islow during active receive conditions. This low is pro-vided to J400-15 via D402, indicating a signal is beingreceived.

J400-3 is DATA_PTT input to the radio, routed viaswitch U402 pins 4 to 3, to U101-8. The ASFIC (U201) isconfigured for FLAT_TX_AUDIO when DATA_PTT isasserted at U101--8.

J400-5 provides a FLAT_TX_AUDIO input to the radio,via C418 and gain-reduction buffer U202 (pins 1, 2, 3),to U201-D7. This connection is always provided and isnot reconfigured by the setting of switch S401 (1-3).

J400-11 provides a Flat/Unmuted RX Audio Outputfrom the radio. This audio is obtained directly fromdetector U5201-28 via C230 and R236, is routed fromU402 pin 10 to pin 5, amplified by U403 and applied toJ400-11 via R419 and C419.

RSSI Buffer

For special applications, a DC voltage proportional toreceived signal strength can be provided to J400-15.This requires removal of resistor R430 and diode D402,and insertion of resistor R215. The DC signal-strengthvoltage is provided by detector U5201-11, buffered byU202 (pins 12, 13, 14), and routed via R215 to J400-15.

Page 62: Engineering Gtx

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Theory of Operation GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Controller Audio & Signaling Circuits

Page 63: Engineering Gtx

September, 2000 6880906Z19-O 9-1

Section 9Troubleshooting

OverviewThis section contains six troubleshooting tables for thefollowing GTX components:

• Receiver

• Synthesizer

• 12W/30W Power Amplifier

• Controller

• Control Head

Troubleshooting Charts

Page 64: Engineering Gtx

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Troubleshooting GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Troubleshooting Charts

Start

Is K9.1 0 V

Is AUDIO_DET

Check

Check RX_INJ<-

>-50dBm

Check

Check

Check

Check LO_INJ <0dBm

>0dBm

Check

Check IF <-35dBm>-35dBm

Is <-38dBm

Is DC

Replace

Is <-48dBm,

Replace

RF input level is -47dBm.

Is <-35dBmCheck

Is <-20dBmCheck

Is <-22dBmCheck

All the levels indicated have

NoYes

Yes

Yes

No

No

No

Replace

Yes

YesNo

Yes No

DC circuit.

logic circuit.

Rx/Tx switch.

synthesizer

controllercircuit.

Y5201.

Q5201.

Y5202.

U5211. Q5301.

level.

levelon L5401.

present on

R5302.

Circuit.

present at

AC level0.1Vrms,

1KHz?

End

Y5202-3?

Y5202-1?

45.1MHz, presentat U5211-5?

Noat Q7420-C?

50dBm

a tolerance of 10%.

NOTE: level.

Is

present at RF_REG_5V

Q5320 E-2?

Yes

Yes

Yes

Y5201-3?

present on

prsent on

C5312?

present acrossR5302?

No

No

B

Troubleshooting Flow Chartfor Receiver

Page 65: Engineering Gtx

September, 2000 6880906Z19-O 9-3

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Troubleshooting

Troubleshooting Charts

Troubleshooting Flow Chartfor Receiver (cont.)

Check RF level

Check RF &

>-18 dBM >-18 dBM

Start

Check 9.3 VDC at

9.3V

Check DC

Check ADAPT Check

Check DC at

5V

Check

>1V

<4.7V

<9V

Is RF level

Is RF level

Check

Check FL5201

Check FL5202

-13 dBm 2dB

-3 dBm 2dB

-3 dBm 2dB

OV

Check

No

No

Yes

Yes

Yes

B

IF circuit.

at C5208.

at U5201-22.

DIFFERENCEBETWEENIN & OUT

DIFFERENCEBETWEENIN & OUT

DIFFERENCEBETWEENIN & OUT

U5201.

on Y5211 at44.645MHz?

on FL5201 IN & OUTat 455KHz? circuit.

circuit.

Y5211circuit.

control circuit.

DC circuit.

circuit. U5201-13.

C5251.

Is RF levelon FL5202 IN & OUT

at 455KHz?

No

Page 66: Engineering Gtx

9-4 6880906Z19-O September, 2000

Troubleshooting GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Troubleshooting Charts

Check C5738, C5724,C5713, L5709.

Troubleshooting Flow Chartfor Synthesizer

Start

Controller

Check synthesizerloop filter.

Replace U5702.

212mV onC5750?

Is AUDIO MOD

Yes

No

Is there

Yes

No

SYNTHESIZER DEVIATION

SYNTHESIZER PENDULUM

Start

Is 2.1 MHzReplace R5731.

Check C5733and R5715.

Replace U5702.

Replace L5700.

Check L5704.

Replace U5703.

Replace U5700.

Is 16.8 MHz

Is 5V presentat U5700-13?

Is 5V presentat L5700?

Is 5V presentat U5703-2?

Is 9.3Vpresent

at U5703-1?

Is 16.8MHzpresent

at U5700-10?

at R5731?present

at U5700-10?present

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

Yes

No

No

No

No

at C5700?present

Page 67: Engineering Gtx

September, 2000 6880906Z19-O 9-5

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Troubleshooting

Troubleshooting Charts

Troubleshooting Flow Chartfor Synthesizer (cont.)

NO Tx INJECTION

Start

Is 5V presentat Q5707-C?

Check Q5707

Is 2.1 MHzpresent

at R5731?

DC circuit.

Check Q5701 andQ5705 DC circuits.

Check RF path line-up.

Page 68: Engineering Gtx

9-6 6880906Z19-O September, 2000

Troubleshooting GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Troubleshooting Charts

Troubleshooting Flow Chartfor 12 W Power Amplifier

START

NoNo

NoNo

NoNo

YesYes

YesYes

YesYes

Is PA control

Is Red light on?

Is control head

Is K9.1 OK?

Go to

Go to

Go to controller

Is there

Faulty power setting DAC

Faulty coupler.

Is Check R6519, U701,

Is Faulty current sense

Is

Faulty integrator.

Faulty REF voltage.

IsIs RF at

Are voltages

Is RF

Is RF after

Is RF after

Replace Antenna

Check CR6501, Q6506,

Check U6502, R6520,

Replace U6501.

Check CR6502, CR6503,

Check L6513, L6513,

Is there 5V atGo to synthesizer

PA RF SECTION FAULT PA LOGIC SECTION FAULT

RF Levels were measured with an

RF probe in series with 0.5pF

Is TX_INJ Go to controller

*U6501 DC voltages:

Pin 2: 9.1V (during Tx only)Pins 3 and 4: A+-0.1V

No

No

No

No

No

NoNo

NoNo

No No

No

Yes

Yes

Yes

Yes

YesYes

YesYes

Yes

Yes

Yes

Yes

OK?control headtroubleshooting.

5V at Is there

K9.1 ENB? troubleshooting.

9.3V at Q741or Q742?

ReplaceQ741 and Q742.

synthesizertroubleshooting.troubleshooting.PA_ENABLE?

(PA_PWR_SET)at U702-2 there ~2V

or software

Is there ~ 0V atU701-7?

Check CR6509, R6515,CR6506, R6514, L6516,R6512.

L6515, R725, R721,R722, R723.

mechanism. CheckR6520, U701 DAC(U702-11).

Check R251, R252,U251.

Replace U701.connector.

Harmonic Filterat ~23dBm?C6543.

CR6504, R6538, R6539,R6537.

L6519, L6504 ,L6505,L6506,VR6501.

Q6501, L6503, L6502.

troubleshooting.

U6501~2dBm?

>2dBm?

at ~0V?

at U6501*OK?

output ~24dBm? at U6501

Tx switchat ~24dBm?

?

U701-14at <4.5V?

U701-1at <4.5V?

U701-10~4.6V?

capacitor.

Page 69: Engineering Gtx

September, 2000 6880906Z19-O 9-7

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Troubleshooting

Troubleshooting Charts

Troubleshooting Flow Chartfor 30W Power Amplifier

START

NoNo

NoNo

NoNo

YesYes

YesYes

YesYes

Is PA control

Is Red light on?

Is control head

Is K9.1 OK?

Go to

Go to

Go to controller

Is there

Faulty power setting DAC

Faulty coupler.

Is Check R6519, U701,

Is Faulty current sense

Is

Faulty integrator.

Faulty REF voltage.

IsIs RF at

Are voltages

Is RF

Is RF after

Is RF after

Replace Antenna

Check CR6501, Q6506,

Check U6502, R6520,

Replace U6501.

Check C6555, CR6502,

Check H6502, L2,L3,L4.

Is there 5V atGo to synthesizer

PA RF SECTION FAULT PA LOGIC SECTION FAULT

RF Levels were measured with an

RF probe in series with 0.5pF

Is TX_INJ Go to controller

*U6501 DC voltages:

Pin 2: 9.1V (during Tx only)Pins 3 and 4: A+-0.1V

No

No

No

No

No

NoNo

NoNo

No No

No

Yes

Yes

Yes

Yes

YesYes

YesYes

Yes

Yes

Yes

Yes

OK?control headtroubleshooting.

5V at Is there

K9.1 ENB? troubleshooting.

9.3V at Q741or Q742?

ReplaceQ741 and Q742.

synthesizertroubleshooting.troubleshooting.PA_ENABLE?

(PA_PWR_SET)at U702-2 there ~2V

or software

Is there ~ 0V atU701-7?

Check CR6509, R6515,CR6506, R6514, L6516,R6512.

L6515, R725, R721,R722, R723.

mechanism. CheckR6520, U701 DAC(U702-11).

Check R251, R252,U251.

Replace U701.connector.

Harmonic Filterat ~29dBm?

CR6503, Q6505.

L6519, L6504 ,L6505,L6506,VR6501.

Q6501, L6503, L6502.

troubleshooting.

U6501~2dBm?

>2dBm?

at ~0V?

at U6501*OK?

output ~24dBm? at U6501

Tx switchat ~24dBm?

?

U701-14at <4.5V?

U701-1at <4.5V?

U701-10~4.6V?

capacitor.

Page 70: Engineering Gtx

9-8 6880906Z19-O September, 2000

Troubleshooting GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Troubleshooting Charts

Troubleshooting Flow Chartfor Controller

Start

Apply power to radio and

Was good or bad power-on

Yes

End

Was good power-on beep

Are alert tonesenabled with RSS?

Use RSS to enable tones.

Was good power-on beep present?

Main radio board must bereplaced.

Are tones presenton power up atU202, pin 8?

Audio problem. Trouble-shoot audio circuitry.

With power connected to radio and the radio turnedon, check the following:1) 5 V at pin 1 of U631 and pin 71,12,31,41 of U101.2) Check for 14.7456 MHz at pin 73 of U101.3) Check DC at pin 75 of U101. If < 4.5V DC checkC202 for 2.1 MHz signal.4) Check for typical voltages of U101 and U201.

beep present?

turn on.

present?

Done

Done

Done

Yes

Yes

Yes

Yes

No/Don’tknow

No

No

No

Are alert tonesenabled with RSS?

RIB/radioconnections OK?

Yes

No

No

Yes

Reprogram radio withRSS. Apply power toradio and turn on.

Check radio con-nection to RIB andcomputer.

Page 71: Engineering Gtx

September, 2000 6880906Z19-O 9-9

GTX LTR/Privacy Plus 900 MHz Mobile Service Manual Troubleshooting

Troubleshooting Charts

Troubleshooting Flow Chartfor Control Head

Start

Check controller.

Check LCD, U932,Q953, and ZEBRAconnectors.

Check U941,Q942-4,D942-4.

Check R915-922,R955, and R958.

Do the LEDslight?

Check U942, and U970.

Is backlight OK?

Is volume OK?

Check U941, Q951,Q952,D951-D970.

Is keypadOK?

Is the displayon?

Is SPIcommunication

OK?

End

Yes

NoYes

Yes

Yes

No

Yes

Yes

No

No

No

No

Page 72: Engineering Gtx

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Troubleshooting GTX LTR/Privacy Plus 900 MHz Mobile Service Manual

Troubleshooting Charts

Page 73: Engineering Gtx

September, 2000 6880906Z19-O 1

DET_AUDIOK9.1

LO_INJPA_K9.1

RF_REG_5VRSSI

RX_IN

PA

PA_CNTR

RXSYNTH

TEMP

VAG

2.1MHZ9V3

K9.1LO_INJ

MOD_IN

PEND_SELRF_REG_5V

SPI_CLKSPI_DATA

SYNT_LOCKSYNT_SEL

TX_INJ

9V3

ADAPT

ADAPT

DAC_CE

DET_AUDIO

FLT_A+

FRACN_CE

K9V1_ENABLE

LOCK_DET

MOD_IN

PA_ENABLE

PEND_CE

RSSI

SPI_CLCK_SRC

SPI_CLK

SPI_DATA

SPI_DATA_SRC

SW_B+

SW_B+

TEMP

VAG

VFORWARD

CURRENT_SENSE+

CURRENT_SENSE-

FLT_A+K9.1

PA_CNTRL

PA_K9.1

PA_TEMP

RX_IN

TX_INJVFORWARD

CONTROLLER

2_1MHZ

9V3

9V3

CURRENT_SENSE+

CURRENT_SENSE-

DAC_CE

K9.1

K9.1_ENABLE

PA_CNTRL

PA_ENABLE

PA_TEMP

SPI_CLCK_SRC

SPI_DATA_SRC

Schematic Diagram for HLF9003A, HLF9004A,HLF9009A & HLF9010A Main Boards,

Radio Block Diagram Section

Page 74: Engineering Gtx

2 6880906Z19-O September, 2000

9V3

MIXER SHIELD

45.1MHz 45.1MHz

LNA SHIELD

IF AMP SHIELD

R5241

0

0

0NU

R5326

R5327

0NU

K9.1

R5328

SH5203SHIELD

9V3

R5240

100

5R

SH5202SHIELD

R5230

47K

K9.1

RF_REG_5V

Q5230

SH5201SHIELD

R532210

R5325

390

1500PF

C5224

5.6KR5212

R5324

390

3.9PFC5214

FL5201

GND

2

IN1

OUT3

C520022PF

455KHz

L5401

C540427PF

0.47M

R540151

SQ_RECT_IN

16

SQ

_TA

IL_T

C

27T_R

L54020.47M

OSC_FB

10OSC_OUT

6PREAMP_IN

5PREAMP_OUT

19

RIP

PLE

_FIL

T

RSSI_BYP25

11RSSI_OUT

24

SQ

_LIM

_IN

23SQ_LIM_OUT

30SQ_NOISE

15SQ_OUT

20

31

DE

MO

D_O

UT

14DRIVE

GN

D

1 26

ICO

_TU

NE

3

IF_A

MP

_IN

36

IF_A

MP

_OU

T

35

LIM

_IN

7LO_IN

8MIXER_IN

4

MIX

ER

_OU

T

9

5V_R

EG

12

5V_R

EG

1

17

5V_R

EG

2

34

5V_R

EG

3

22ADAPT

29

AU

DIO

_IN

28AUDIO_OUT

13B+

CHAN_DET18

33

DE

MO

DE

_FIL

T

32

DE

MO

D_F

ILT

GN

D3

5

IF2

LO6

RF3

IFIC

U5201

21

2.5V

_RE

G

2

MIXER

U5211

GN

D1

1

GN

D2

4

C5326

5R

5R

39PFC5321

0.01UF

RF_REG_5V

K9.1

RF_REG_5V

RF_REG_5V

3PF

C5202

15PF

L5201

1200NHC5201

FL5202

455KHz

2

GND

1IN

3OUT

7.5KR5223

39PFC5236

39PF

C5235

39PFC5233

39PFC5237C5229

39PF

C5239

13KR5224

39PF

130KR5221

.039UFC5226

C5251

3.3UFC5225

C5227

10UF

C5231

4.7UF

Y5201

GND

IN OUT

0.47UF

938MHz

CASE

IN OUTQ5301

FL5203

938MHz

CASE

IN OUT

FL5204

C5213

13PFC5212

36PF

820R5211

16PFC5211

1200NHL5211

L5322

0.1UF

C5208

C5207

68NH

.00

R5207

L52031.0UH

0NU

R5231

0

.00HL5202C5206

20PF

.00

R5204

100

C5205

R52052K

33K

R5202

0.1UF

R5203

6.8K

0.1UF

C5223

0.1UF

C5234

C5203

0.1UF

C5252

C5204

0.1UF

13K

C52280.1UF

1

3

2

R5201

D5303

1

3

2

D5201

R5323

3pF

C5312

300

6.8nL5302

150R5306

13KR5312

13KR5311

220R5302

C5322220

R5321

39PFC5310

39PF

0.01UFC5311

0.01UFC5325

0.01UFC5324

L53210.01UFC5323

C5308

4.2NH

44.6450M

6.8pF

Q5201

Y5211

Y5202

GND

IN OUT

9V3

RF_REG_5V

K9.1

LO_INJ

RX_IN ADAPT

DET_AUDIO

RSSI

PA_K9.1

Schematic Diagram for HLF9003A, HLF9004A,HLF9009A & HLF9010A Main Boards,Receiver Section

Page 75: Engineering Gtx

September, 2000 6880906Z19-O 3

5V SQ WAVE (1.05MHz)

12-13.5V DC

MIMIC LINE UP SWITCH VCO

NUNU

22

24 SS

13VDD

VD

D14

12V_OPT

11V_REG

26 YSSD|YSSA

1N

.C.

3N

.C.

4N

.C.

5N.C.6N.C.

15N

.C.

16N

.C.

17N

.C.

18N

.C.

21 S0

25 S1

SCK

98DET

10F_OUT

N.C

.2

19N

.C.

20N

.C.

27 N.C.28 N.C.29 N.C.

30N

.C.

31N

.C.

32N

.C.

PENDULLUMU5700

23 CE

7C_EXT

DE

C573422NF

R5715

C575239PF

C5753

2.2K

C575139PF

L57001.0UH

33NFC573522NF

C5733

22NF

4.7uF

200K

C57170.1UF

R5709200K

C5720

R5700

2.2K

R5708

R57073.3K

C573222NF

C571210UF

20P

RE

IN

17S

UP

FC

AP

18S

UP

FO

UT

19S

UP

IN

24T

ES

T1

25TEST2

32VCP10

VMULT1

9VMULT2

16WARP

14XTAL1

15XTAL2

26CPB|AS2

5D

ATA

12DC5V

22D

C5V

123

DC

5V2

3D

C5V

3

11FREFOUT

13GND

21G

ND

1

30GND2

4G

ND

4

31IADAPT

29IOUT

2LO

CK

8M

OD

IN

28MODOUT

9.3V

U5702QFP_FRACTIONAL_N

1A

UX

3

7C

EX

6C

LK

27CPB|AS1

C57210.1UF

C575739PF0.1UF

C5723

39PF

C5756

0.1UFC5803

C5755

39PF

C58020.1UF

CR5700TRIPLE_DIODE

16

39PF

C57540.1UF

C5722

10NFC5744C5747

10NF10NF

0.1UFC5799

0.1UF

C5746

R5717

C5798

2.7K

10NF

C57970.1UF

C5745

C5736

0.1UFC5796

2.4KR5716

1.200N

R573451

C5750

C5749

51

R5736

C570139PF

C5705

5V_REG

5V_REG

5V_REG

0.1UF

5V_REG

9.3V

C574039PF

C57584.7uF 22NF

C571422NF

L5704

1.0UH

C57250.1UF

C5739

U5703

GND

3

I1

O2

C571310UF0.1UF

C572422NF

C5738

560NH

L5709

22NFC5737

GND

5

NC1

4.7UFC5718

U5705

+V

3

AUX_IN4

AUX_OUT2

C576739PF

C576639PF

Q5700

4.7KR5711

39PFC5762

39PF

5V_REG

8V5

8V5

C5761

C57154.7uF

R5738

22

C57260.1UF

22R5737

39PFC5760

150NH

C575939PF

150NH

L5706

GN

D4

INPUT1 OUTPUT 5

8

VC

C

L5705

U5701

2

GN

D

3

GN

D1

4

GN

D2

6

GN

D3

7

R5704

39PFC5706

330

39PFC5707

0.1UFC5702

C570022NF

8V5

SW_RX

SW_TX

SW_RX

SW_TX

L57071.0UH

C57164.7uF0.1UF

C5728

C576539PF22NF

C5741

U57043

+V

4AUX_IN

2AUX_OUT

5

GND

1NC

39PFC5764

C576339PF

C57270.1UF

22NFC5742

39PFC5768

C5773

39PF

39PFC5771

1.5KR5718

R5710

10K

R5728330

39PF

C5772

Q5703

8V5

C5770

39PF

39PFC5708

R5703

Q5702

R574051

10K

51

C5769

R5739

R5731

100

39PF

0.1UFC5729

C5743

U5707M_LIN

GND

IN

OUT

22NF

M_LINU5706

GND

IN

OUT

C5710

100PFC5711

C5709

100PF

34

100PF

25

0.01UF

C5748

C57194.7uF39PF

C5775510

R5727510

R5726R5725510

C577439PF

C5730

R5724510

R5723

0.1UF

L5708

0NU0NU

150NH

Q5705

R5722

C5731

R5721

0.1UF

R5714

0NU

2.7K

270

R57200NU

R5755

22

R575739PF

C581339PF

C5814

R575333

R5754330

2.7K

C581039PF

2.7K

R5750

R5752330

R5751

Q5707

39pFC5811

22R5748

5V_REG

C58060.1UF0.1UF

C5805

C58040.1UF

5V_REG

SHIELD

5V_REG

SHIELDE5703E5700

SHIELDE5701

2.2pF

SHIELDE5702

NC

C5793

NC

NC

NCNC

NC

NC

E5704SHIELD

R5756270

C57902.7pF

CR5702

39PF

1.0UH

L5702

C5795100PF

C5794

C57031.6pF

100PF

C57041.8pF 2.4PF

C5787

180

C5786

Q5704

R5744

2.2pFC5785

2.2pFC5784

R57426.8K

R574310K

1.2pF

C5783

CR5701

3.3pFC5782

1.0UH

L5701

R5735

51

100R5733

2.2pFC5792

100R5732

Q5701

C5779

39PF

R57190NU

4.7KR5713

R574110

R57124.7K

C577839PF

150

R5729

R5702

0NU

0NU

L5703

R5701

10KR5705

1.0UH

510R5706

C5788100PF

180

C5789

2.4PF

R5745

C5776

Q5706

R57476.8K

39PF

R574610K

C5791

1PF

2.1MHZ

LO_INJ

RF_REG_5V

9V3

K9.1

TX_INJ

MOD_IN

SYNT_SEL

SYNT_LOCK

SPI_DATA

SPI_CLK

PEND_SEL

Schematic Diagram for HLF9003A, HLF9004A,HLF9009A & HLF9010A Main Boards,

Synthesizer Section

Page 76: Engineering Gtx

4 6880906Z19-O September, 2000

12pFC6540

ANTENNA CONNECTOR

This inductor (L6520) is to prevent build-upof electro-static charge at the output.

Power Connector

LAMBDA/4 Line

NC

C6545.01uF 0.1uF

C6546

R6530R653139

C6551

.01uF

22

C6522

39pF

7.5pF

C6523

C65521uF

C65660.1uF .01uF

C6548

57R01

39pFC6519

57R01L6508

GN

D

6

RC

VR

5

1RFOUT

3

SW

DC

4 2

VF

RW

D

L6510

07L01H6502100K

R6514

C6555

130pF

C65531uF

C657039pF

1.5K

R6523

1.5K

R6525

2.5nH

L6507

R6506560

R6504560

R6505

10

39pF

C6554

57R01

CR6503

MA4P1250

57R01L6519

2.2pF

L6518

R6528

C6520

560

L65213.85nH

4.2NHL6513

82nH

L6509

3

GN

D1IN

2OUT

R6540

04H03H6501

4

3

1

2

100

R6520

1.639m

1

1.2pFC6502

SHIELDSH6501

R65084.7

R6509

100K

100K

R6532

10pFC6539

12pFC6568

C656712pF

C654210pF

C654110pF

C65632.7pF

Q6505

82nH

L6523

0.1UFC6501

5RF_OUTPUT

L65027.66NH

MHW2821-2U6501

2+DC|BIAS

3+DC|SUP.

4+DC|SUPP.

6

GND

7

GND1

1RF_INPUT

J6501

NC

NC

0.1UFC6549

.022uF

NC

C6507

C6524

C6569

0.1UF

L651468nH

0.1UF

68nH

L6511

VR650112V

AUX_OUT2

GND

5

NC1

R6555

220

1000PF

U6502

+V

3

AUX_IN4

L6512C6525

R6524

23.75NH

1.5K

C6510

0.01UF

68nH

L6516

C653539PF

3.3KR6515

12C6529

39PF CR6509

3

39PFC6534

1000pF .01uFC6564 C6565C6538

C6537

0.1uF

24V39PF

C6571

CR6508

39PF

39PF

L6506

C6518

C6516

0.1UF

C6513

1UF

C6509

L6505

C6512

0.01UF

1UF

C6515

0.1UF

0.01UF

L6504

0.1UF

C6508

C6511

0.1UFC6550

39PF

C6506

39PFC6526

39PFC6505

L6503

Q6501B

B

C C

E E E E

68nH

68nHL6501

MRF8372

C650339PF

10

R6503

2 1

Q6506

10

CR6501

3

560

R6526

R6527

C653339PF

C6532

68nH

L6517

39PF

68nH

L6515

MA4P1250

47KR6519

L6522

CR6502

1UF

C6514

82nH

39PF

C6517

CURRENT_SENSE-

PA_K9.1K9.1

PA_CNTRL

VFORWARDTX_INJ

PA_TEMP

FLT_A+

CURRENT_SENSE+

RX_IN

Schematic Diagram for HLF9003A & HLF9004A Main Boards,Power Amplifier Section

Page 77: Engineering Gtx

September, 2000 6880906Z19-O 5

R726

10K

39PFC741

C722

C72339PF

C72539PF

39PF

C71339PF

C70239PF

C70139PF

22K

R704

22K

R711

0.1uF

C731

Q742

R743

1K

Q741

0.1uF

C727

22K

R722

LM290213

1214

4

11

U701

2

31

4

11

U701

Q1-OUT4

Q2-OUT11

Q3-OUT13

Q4-OUT

3R1-OUT 5R2-OUT 12R3-OUT 14R4-OUT

16

VDD

7

VSS

LM2902

MC144111U702

10CLOCK

1DIN

15DOUT

6ENABLE_

8NC1

9NC2

2 4.7K

R734

C712

0

0.1uF

560

R705 R712C711

0.1uF

R702

2.4K

6

57

4

11

CR721

108

4

11U701

LM2902LM2902

U701

9

1.5K

C70339PF

R703

R741

22K

R713

510

4.7K

R736

4.7KR737

39PF

100K

R723

C726

5.6KR721

NC

NC

3.3K

R724

NCNC

NCNCNCNC

10KR725

100KR706

R732

4.7K

R714

100

Q731

1.5K

R742

2.2K

R740

10.0KR718

1K

R719

100KR730

R731100K

100K

R729

22KR727

0.1uFC724

R716

R717

10K

10K

.00

C714

R720

R715

1K

R733

10.0K

100K

4.7K

R728

DAC_CE

SPI_CLCK_SRC

SPI_DATA_SRC

K9.1_ENABLE

VAG

PA_TEMP

VFORWARD

9V3

PA_PWR_SET

9V3

9V3 9V3

VAG

K9.1

CURRENT_SENSE+

SW_B+

SW_B+SW_B+

TEMP

PA_CNTRL

CURRENT_SENSE-

SW_B+

SW_B+

PA_ENABLE

Schematic Diagram for HLF9003A & HLF9004A Main Boards,Power Control Section

Page 78: Engineering Gtx

6 6880906Z19-O September, 2000

(-)

(+)

POWER CONNECTOR

ANTENNA CONNECTOR

This inductor (L6520) is to prevent build-upof electro-static charge at the output.

Microstrip Coupler

LAMBDA/4 Line

LAMBDA/4 Line

Coplanar Match

39PFC6519

J6501

L6519

0.1UFC6549

0.1UFC6550

560R6528

NC

C6536

4 3

1 239pF

R65201.639m

C656230pF

C65603.3pF

C65511.5pF

C6552

NC

NC

NC

1.5pF

NC

0.01UF

C6512

0.1UF

C6509

C6515

1UF

L6504

1KR6505

0.1UF

C6508

0.01UF

1UF

C6514

C6511

39PF

C6517

510R6504

L6516

68nH

R65143.3K

100R6512

3.3K

CR6506

10PF

C6526

R6515

39PF

CR6509

3

12

C6529

CR6504

CR6501

3

2 1

10

R6526

560R6527

C653339PF

L6517

68nH

C653239PF

1

J6502

2

C653739PF

39PF

CR6508

C6518

C6538

L6506

39PF

0.1UF

C6513

1UF

C6516

C6520

L6505

10pF

22

R6506

39PF

22

R6502

39PFC6505

C6506

L6503

68nH

B

B

C C

E E E EL650168nH

Q6501MRF8372

39PFC6503

10

R6503

Q6506

C6542

7.66NH

L6518

R65311.8PF

R6532100 100

1.5K

1.5K

R6523

R6525

R6524

1.5K

0.01UF

C6510

C653539PF

3.3PFC6553

L652082nH

C6527

39PF

47

0.1UFC6501

R6538 R6539

47

47

15pFC6523

R6537

3.9pFC6540

5.6PF

L65027.66NH

C6502

RF_INPUT1

RF_OUTPUT5

C65411.8PF

U6501MHW2821-2

+DC|BIAS2

+DC|SUP.3

+DC|SUPP.4

GND

6

GND1

7

C654539PF

L6515

68nH

C653439PF

R6519

MA4P1250

CR6502

47K

CR6503

MA4P1250

L651168nH

L6507

82nH

0.1UFC6507

C65440.1UF

C65460.1UF

L651468nH

C6543

39PF

68nH

L6509

220

VR650112V

L6513

R6555

22NF

7.66NH

U65023

+V

4AUX_IN

2AUX_OUT

5

GND

1NC

C6524

C6525

1000PF

CURRENT_SENSE+

L6508

23.75NH

CURRENT_SENSE-

FLT_A+

PA_K9.1

K9.1

PA_CNTRL

VFORWARD

TX_INJ

PA_TEMP

RX_IN

Schematic Diagram for HLF9009A & HLF9010A Main Boards,Power Amplifier Section

Page 79: Engineering Gtx

September, 2000 6880906Z19-O 7

R711

22K

C714

2.2K

R712C711

22NF

39PF

R705

3.3K

22K

R702

200KR706

NCNC

R72510K

R740

2.2K

4.7K

R732

1.5K

R741

R70322K

C731

0.1uF

Q742

C712

0.1uF

Q731

R742

1.5K

100

R714

39PFC703

CR721

U701

6

57

4

11

LM2902

9

108

4

11LM2902

LM2902U701

13

1214

4

11

U701

LM2902

2

31

4

11

R728

U701

3.74K

100KR717

R71810.0K

R731

R719

1K

100K

100K

R729

100K

R730

R743

1K

C727

Q741

0.1uF

R722

22K

39PFC713

C701

39PFC702

22K

39PF

NC

NC

R704

NCNC

NCNC

R7344.7K

4.7K

Q1-OUT2

Q2-OUT4

Q3-OUT11

Q4-OUT13

R1-OUT3

R2-OUT5

R3-OUT12

R4-OUT14

VDD

16

VSS

7

R733

U702MC144111

CLOCK10

DIN1

DOUT15

ENABLE_6

NC18

NC29

R716

3.74K

R715

R72010.0K

1K

510

R713

R736

4.7K R7374.7K

C726

R723

100K

39PF

R7215.6K

R724

3.3K

R72722K0.1uF

C724

10K

R726

C74139PF

39PFC723

C72239PF

SW_B+SW_B+

SW_B+

39PFC725

VFORWARD

VAG

9V39V3

PA_TEMP

SW_B+

SW_B+

VAG

K9.1_ENABLE

9V3

K9.1

PA_PWR_SET

9V3

PA_ENABLE

SPI_DATA_SRC

SPI_CLCK_SRC

DAC_CE

PA_CNTRL

CURRENT_SENSE+

CURRENT_SENSE-TEMP

Schematic Diagram for HLF9009A & HLF9010A Main Boards,Power Control Section

Page 80: Engineering Gtx

8 6880906Z19-O September, 2000

HEAR_CLEAR

GATED_RX_AUDIO

HOOK_RSS

IGNITION_CONTROLIGNITION_SENSE

INT_SPKR+

INT_SPKR-

K9V1_ENABLE

MIC

PTT

PUBLIC_ADDRESS

RSSI_BUF

RX_AUDIO

SCI_TX

SW_B+

VAG

VPP

TX_IN

USW_+5V_CL

VAG

VPP

AUDIO_PA_&_I/O

+5V

9V3

AUDIO_PA_ENABLE

B+_CONTROL

BUS+

DATA_PTT

EXTERNAL_ALARM

FAST_OFF_IGN

FLAT_RX_AUDIO

FLAT_TX_AUDIO

FLT_A+

ON_OFF_CONTROL

PA_ENABLE

PEND_CE

PTT

PUBLIC_ADDRESS

RESET

RSSI

RSSI_BUF

RX_AUDIO

RX_IN

SCI_TX

SPI_CLCK_SRC

SPI_CLK

SPI_DATA

SPI_DATA_SRC

TEMP

FAST_OFF_IGN

FILTERED_AUDIO

FLAT_RX_AUDIO

FLAT_TX_AUDIOFLT_A+

FRACN_CE

GATED_RX_AUDIO

HIGH_LOW_BAND

HOOK_RSS

IGNITION_SENSE

INT_SPKR+

INT_SPKR-

K9V1_ENABLE

LOCK_DET

MIC

MOD_IN

RX_IN

TX_IN

AUDIO_&_DIGITAL

+5V

2_1MHZ

9V3

ADAPT

ASFIC_MIC_AUD_OUT

AUDIO_PA_ENABLE

B+_CONTROL

BATTERY_VOLTAGE

BUS+

DAC_CE

DATA_PTT

DET_AUDIO

EXP_AUDIO

EXTERNAL_ALARM

9V3B+_CONTROL

BATTERY_VOLTAGE FLT_A+

IGNITION_CONTROL

ON_OFF_CONTROL

RESET

SW_B+

USW_+5V_CL

9V3

ASFIC_MIC_AUD_OUT

DISC

EXP_AUDIO

FILTERED_AUDIO

HC_CNTL

RSSI

SW_B+

SPI_DATA

SPI_CLK

RSSI

PEND_CE

MOD_IN

LOCK_DET

FRACN_CE

FLT_A+

DET_AUDIO

ADAPT

9V3

2_1MHZ

K9V1_ENABLE

TEMP

VAG

SPI_DATA_SRC

SPI_CLCK_SRC

PA_ENABLE

DAC_CE

SUPPLY_VOLTAGE

+5V

Schematic Diagram for HLF9003A, HLF9004A,HLF9009A & HLF9010A Main Boards,Controller Block Diagram

Page 81: Engineering Gtx

September, 2000 6880906Z19-O 9

4

FAST OFF CIRCUIT: POT DETECTOR

J100

+5V

L427

10

VAG

C651

39PF

ANALOG_1

.01uF

L425

C104

R123

NC

NC

NC

10K

10V

VR101

10K

R135

C147.00

C232

+5V

10uF

D101

NC

4

39PF

C242

24PF

6

8

C146

ON_OFF_CONTROL 18

R202

10

10K

LED_CE 12

C209

7

10uF

270nH

L131

6

9V3

47.5K

L419

R2520

9V3

100K

R236

5

2

D200

0.1u

F

C22

5

C22

6

+5V

+5V

.01u

F

33uF

C22

3

C231

.01uF

NC

10K

R203

R100

4.7K

1 2

3

VAG

U106

PTT 4

HANDSET_AUDIO 14

C212

14

0.1uF

C202

39PF

C243

3

470pF

R155

R209

10K

47K

.01uF

R23868K

C111

SPI_DATA_BUF 6

7

NC

NC

+5V

39PFC100

14

L429

100K

R201

3

1

9V3

C114 .01uF

5

29D7

EN_CE30

EN_OE32

EN_WE7

24

GND

6A17

9VPP

8

VCC

2A9

21D0

D122

23D2

25D3

D426

27D5

28D6

10A16

18A2

A317

16A4

15A5

14A6

13A7

3A8

20A0

19A1

A1031

1A11

12A12

4A13

5A14

11A15

AM28F010-120

U102

C106

0.1uF

+5V

10K

NC

R115

C10939pF

+5V

+5V

1

3L4334

C229

.01uF

C228

270nH

L132

.1uF

C253

1uF

47.5K

R251

R116

C102

10K

0.1uF

0.1uF

C101

0.1uF

C254

2

6

0

1

5

15

39PF

C241

7

BUS+

GND

Q101

NC

2

1

3

U251

R231

0NU

200K

R101

C133

FLT_A+

6

0.1uF4

5

47K

U106

R222

47UF

C227

C137

39PF

0NU

11

R134

R121

ANALOG_2

0

4.7K

15

9

L434

R15333K

Q200

L423

39PF

L424

8

7

C646

U106

9

10

R133

39PF

100K

HOOK_RSS 3

C645

TP133

68K

C103

R237

0.1uF

R107 2.2K

NC

+5V

1

R104

47K

100

NC

NC

16

R204

12

14

4.7K

13

7

5

R105

U202

6

C208

NC

330pF

R10810K

C652

39PF

VCC

14

C107

.01uF

GND

7

12

13

11

12Y3

Y411

Y510

Y69

Y77

U106

A01

2A1

3A2

CS16

CS24

5CS3

GND

8

VCC

16

15Y0

Y114

Y213

74HC138A

U105

C134

2

0

+5V

0.1uF

3

1

6

NC

+5V

NC

+5V.01uF C113

39PF

+5V

R12610K

C643

E2XTALOUT

UNATRXOUT

B2

UN

IVIO

UPCLKD1

E7

VA

GC

AP

D8VAGOUT

H8VCOATN

C2

VD

D

C6VOXO

E1XTALIN

RXIN

J3R

XLI

MC

AP

G4RXLIMOUT

H1

SQ

DE

T

H7SQIN

TIM

ING

CA

PH

3

G1TRKCLKIN

C7TXIN

H5

J7PLIN

A4PLLIM

PREMPC8

G7REFATN

J2R

ES

ET

G8RSSI

J4RXAUDOUT

H6

E8LIMIN

C1

LOO

PC

AP

C5

LOW

SP

CA

P B1MDCREF

A6MICAMPOUT

MICINB8

F2PGMENAB

C3PLCLK

G3

GN

D3

D4

GN

D4

E4

GN

D5

F4

GN

D6

D5

GN

D7

GN

D8

E5

F5

GN

D9

A5

LCA

P

B7

GN

DA

GN

DD

D2

D3

GN

D1

GN

D10

G5

E6

GN

D11

F6

GN

D12

G6

GN

D13

F3

GN

D2

A7EXTMICIN

H4EXTVOLIN

GCB0B5

A3GCB1

B4GCB2

B3GCB3

A2GCB4

C4GCB5

BIA

SR

ES

D6

BU

FF

DIS

C

H2

CH

AC

T

F1CLK

F7DACO

E3DATA

DC

AP

B6

DTMFCLKG2

J5EXPAUDIO

U201

35U45

AUXRXINJ6

AUXTXIND7

F8

10uF

C252

4.7K

R112

R122

Q103

47K

C233

33pF

5

R14510K

4

L428

3.3uFC105

L422

10K

R106

0NU

15

R117

16

C649

39PF

2

6

39PF

+5V

C650

39PF

C648

C200

0.1uF

R113

33K

3

TP103

6

7

4

C11039pF

XTA

L74

VD

D31 71

VD

D

VR

H51 50

VR

L

13V

SS

VS

S32

VS

S70

XIRQ30

IN

24P

H2_

PW

3

PH

3_P

W4

IN

25

IN

26P

H4_

CS

IO

IN

27P

H5_

CS

GP

1

IN

28P

H6_

CS

GP

2

IN

29P

H7_

CS

PR

OG

RESET75

VD

D12

PG1_XA1438

PG2_XA15

PG3_XA1637

36PG4_XA17

PG5_XA1835

PG

634

33PG7_R_W

IN

22P

H0_

PW

1

IN

23P

H1_

PW

2

PF1_ADDR158

PF2_ADDR2

PF3_ADDR357

56PF4_ADDR4

PF5_ADDR555

54PF6_ADDR6

53PF7_ADDR7

40PG0_XA13

39

PE1_AN147

PE2_AN2

PE3_AN346

45PE4_AN4

PE5_AN544

43PE6_AN6

42PE7_AN7

60PF0_ADDR0

59

PC7_DATA7

78P

D0_

RxD

PD

1_T

xD79 80

PD

2_M

ISO

1P

D3_

MO

SI

2P

D4_

SC

K

PD5_SS3

49PE0_AN0

48

PB7_ADDR15

62PC0_DATA0

PC1_DATA163

64PC2_DATA2

PC3_DATA365

66PC4_DATA4

67PC5_DATA5

68PC6_DATA6

69

PA7_

PA1_

OC

1

21PB0_ADDR8

PB1_ADDR920

19PB2_ADDR10

18PB3_ADDR11

PB4_ADDR1217

16PB5_ADDR13

15PB6_ADDR14

14

MO

DB

_VS

TB

Y

11PA

0_IC

3

PA1_

IC2

109PA

2_IC

1

8PA

3_IC

4_O

C5

PA4_

OC

4_O

C1

76PA

5_O

C3_

OC

1

5PA

6_O

C2_

OC

1

4

68HC11K1_QFP

41A

VD

D

AV

SS

52

E72

EX

TAL

73

IRQ61

MODA_LIR77

76

68HC11K4_TAU

U101

0NU

R215

R14210K

SPI_CLCK_BUF 5

LCD_CE_BUF 8

MIC 16

.001uF

C108

CR150

Q150

R150

2K

R152

R151

+5V

47K

+5V 9

200K

11

13

12

C136

10

39PF

R208

10K

NC

+5V

D102

4.7K

FLT_A+ 17

R131

C207

NC

0.22uF

7

1uF

C132

11

17

9

80

+5V

10K

R136

1

+5V

5

9V3

R210

1K

NC

NC0

1uF

C22

2

CR151

C211

0.1uF

7

22K

R132

8

L432

1CS_

HOLD_ 7

6SCK

5SI

SO2

VCC

8

VSS

4

WP_ 3U104

EEPROM_X25040

68K

R114

.022uFC210

R22

1

0

7

C22

1 0.

1uF

0

2

R232

4.7u

F

68K

C22

4

R127

C205

4.7K

1 2VDD

5

VSS

3

+5V

0.22uF

1

U203

CNTL

4

6

1

4.7KR111

6

Q102

5

3

GNDIN1

NC 4

NO

6

2

VPOS

19IO8

28

VCC

U204

COM

14

GND

11IO1

12IO2

13IO3

15IO4

16IO5

17IO6

18IO7

A45

A54

A63

A725

A8

A924

20EN_CS

22EN_OE

27EN_WE

A1

21A10

23A11

2A12

26A13

A141

8A2

7A3

6

U103

63A21

10

A09

200K

R102

+5V

39PF

R147

270

11

+5V

C644

U202

9

810

12

VAG

4

4

C203

39PF

4.7uF

C230

Q141

+5V

0.1uF

C131

200K

R103

2

1

3

17

U202

R109270

0.1uF

+5V

13

C151

L430

5

9V3

470

R206

33uH

L200

3

0

10

47.5K

7

R223

L421

L418

.033uF

L420

2

C237

NC

4

+5V

9V3

U202

11

13

1412

4

NC

10K

R233

C647

39PF

R200

10K

270

2

R110

R146

270

7

5

8VCC

4 VEE

L426

MC33072D

U251

6

R205

1K

9

0.1uFC206

INT_SPKR+ 1

ANALOG_3 13

39PF

C201

C204

39PF

0.1uF

C234

3

VAG

L431

C64239PF

2

INT_SPKR- 2

5

5

3

0.1uF

C135

0.1uF

C251

FAST_OFF_IGN

AN_3_OFF

PTT

PUBLIC_ADDRESS

FLT_A+

IGNITION_SENSE

TEMP

LOCK_DET

BATTERY_VOLTAGE

ON_OFF_CONTROL

INT_SPKR-

INT_SPKR+

RESET

SPI_CLK

SPI_CLCK_SRC

VPP

FLAT_RX_AUDIO

HOOK_RSS

FLAT_TX_AUDIO

GATED_RX_AUDIO

FILTERED_AUDIO

EXP_AUDIO

RSSI_BUF

MOD_IN

SPI_DATA_SRC

B+_CONTROL

SCI_TX

LCD_CE

2_1MHZ

RX_IN

MIC

ADAPT

DATA_PTT

RE

SE

T

HIGH_LOW_BAND

HANDSET_AUDIO

EXTERNAL_ALARMDET_AUDIO

SCI_RSS

RSSI

BUS+

USW_+5V_CL

PEND_CE

FRACN_CE

MIC

AUDIO_PA_ENABLE

TX_IN

SQ

DE

T

RX_AUDIO

HANDSET_AUDIO

ASFIC_MIC_AUD_OUT

B+_CONTROL

RSSI

AN_3_OFF

PA_ENABLE

K9V1_ENABLE

VAG

LED_CE

DAC_CE

VPP

+5V

9V3

SPI_DATA

SQDET

LED_CE

LCD_CE

SCI_RSS

Schematic Diagram for HLF9003A, HLF9004A,HLF9009A & HLF9010A Main Boards,

Audio & Digital Controller Section

Page 82: Engineering Gtx

10 6880906Z19-O September, 2000

13

FLT_A+

IGNITION ONE SHOT

FAST OFF CIRCUIT: IGN DETECTOR

SPEAKER

INTERNAL

Standard/Data

JUMPER

Ignition

NC

FLT_A+

INT_SPK+

R451

4.7K

4

1 2

9V3

Q401

SWITCHS401

3

R401

4.7K

FLAT_TX_AUDIO

5

SWB+

J400

9

VR41614V

C415

39PF

VR41514V

100KR417

39PF

C426

R423

VR41233V

4.7K

R4021K

NC

+5V

560

R435

C4602.2UF

C401

0.1UF

10KR467

C42139PF

R431

10K

VR42714V

4.7K

+5V

L406

R440

L415

BLM21A05

4

VAG

FLT_A+

4.7K

EXTERNAL_ALARM/TX_SENSE

6

R433

SCI_DATA_IN

39PFC442

3

R462200K

14V

PTT/DATA_PTT

VR421

C405.001uF

C404

SW_B+

R42810K

47UF

Q450

39PFC410

L411

BLM21A05

560

R424

Q411

39PFC425

.0033uF

C402

NC

R4504.7K

R45210K

C42214V39PF

VR422

NU C403

14VVR426

+5V

VR4305.1V

C427

SW_B+

39PF

R411

D401

8

4

10K

U403

6

57

NC

39pF

C413

R449

L412

33K

EXT_SPKR-1

BLM21A05

NC

100KR420

D402

R40622K

Q410

L409

D403

BLM21A05

VR4255.1V

IGNITION_SENSE10

11

Z112

BLM21A05

L408

1

X4

X02

X13

Y5

Y06

Y110

Z13

Z0

9CNTL

16

VD

D

7

VE

E

8

VS

S

W14

W015

W1

C412

U402

39PF

C414

1000pF

7

200K

R418

7

VC

C

GROUND

2G

ND

15

GN

D2

9INV

8M_SS

1NINV

4OUT1

6OUT2

3RR

U401

R421

560

R460

200K

+5V+5V

EXT_RX_AUDIO11

10K

R426

1M

Q460

U460

67

5

8

4

R463

L414

100

R419

VR431

R405

10K

14V

+5V

C451

C409

39PF

.1uF

R422

R427100K

FLT_A+

4.7K

BLM21A05

L405

L435

.01uFC408

L404

BLM21A05

F401

R44247K

2

500mA63V

PUBLIC_ADDRESS/SPEAKER_MUTE12

EXTERNAL_MIC_AUDIO

C407

+5V

21

3

.01uF

FLT_A+

U460

SCI_DATA_OUT8

C419

47uF

L403

R465

4.7K

BLM21A05

14

10K

R425

HOOK

U403

2

31

8

4

L407

VAG

BLM21A05

9V3

39PFC431

R461

47K

+5V

C416L410

39PF BLM21A05

39PFC423

C411.01uF

R404

10K

5.1VVR410

R412

L416

FLT_A+

4.7K

R4664.7K

BLM21A05

L413

4.7uF

C418

SYS_BUSY/RSSI_BUF

15

33V

R430

+5V

VR441

EXT_SPKR+16

4.7K

R468

10K

5.1VVR451

SW_B+

Q461

.001uF

C406

R464

470K

IGNITION_SENSEVPP

PUBLIC_ADDRESS

INT_SPKR+

INT_SPKR-

RSSI_BUF

HOOK_RSS

MIC

AUDIO_PA_ENABLE

RX_AUDIO

DATA_PTT

BUS+GATED_RX_AUDIO

PTT

EXTERNAL_ALARM

K9V1_ENABLE

FLAT_RX_AUDIO

VAG

SW_B+

9V3

+5V

FLAT_TX_AUDIO

SCI_TX

IGNITION_CONTROL

B+_CONTROL

FAST_OFF_IGN

FLT_A+

Schematic Diagram for HLF9003, HLF9004A,HLF9009A & HLF9010A Main Board,Audio PA & I/O Sections

Page 83: Engineering Gtx

September, 2000 6880906Z19-O 11

IN8

OUT1

2SENSE

SHDN3

_ERORR5

U631

5V_TAP6

FDBK7

GND4

3

2

1

D611

1K R614

Q601

NC

5.1V

VR621 39PF

C621 C62247uF

R621

2.2K

D6313

2

1

0.1uF C612

C605.1uF

10

R604

R632

6.8K

39PF

3.3K

R617

C601

R605

22K

R603

0

R606

1.2K

5.1VVR641

10uF

C603

10K

R613

R615

TP601

3.3K16.2K

R601

R642

10K

33uF

3

2

1

C632

D621

47.5K

R641

Q611

7.5K

R602

C602.1uF

R631

10

R61610K

C613

39PF

C6410.1uF

C633

R611

.022uF

1.2K

33uF

C604

C635C631.1uF

Q612

.1uF

R612

3.3K

47uF

12 3

4 5

6

C611

U601

SW_B+

FLT_A+

USW_+5V_CL

47uF

C634

RESET

+5V

ON_OFF_CONTROL

B+_CONTROL

IGNITION_CONTROL

9V3

BATTERY_VOLTAGE

Schematic Diagram for HLF9003A, HLF9004A,HLF9009A & HLF9010A Main Boards,

Supply Voltage Section

Page 84: Engineering Gtx

12 6880906Z19-O September, 2000

R352

1.5K

47.5K0.01UF

R353

0.1UF

C354

100NF

C365

C362

10.0KC3563.3UF

R356

C374

0.01UF

C352470PF470PF

D5

RSSIINF5

VAGA4

VCC

B3

C351

NCB1

B4NC1

E5NC2

D6NC3

E6NC4

NFILINB5

NFILOUTC6

NOISHLD

D4

FFENABE3

FFINE4

FFOUTF4

GND

A3

HCIDSABB6

HIENABC2

ICENABC4

LODSABA5

D2

COMPCAPE1

COMPOUTF3

CPNENABD1

EXPADJB2

EXPBYPC3

EXPINC1

EXPOUTA2

FFCNTL

U35035U50

CBUFIND3

CBUFOUTF2

CFBBYPE2

CLIPREFC5

COMPBYP

3300PF

22K

C364

R351

C300.220UF

C3633300PF

C358

0.33UF

C361

0.1UF

C3673300PF

R350

100K

C353

0.33UF

NC

NC

NC

NC

NC

100K

NC

NC

100K

R357

1K

R354

0.1UF

C360

R355

C357

0.01UF

C355

3.3UF

100NF

TX_IN

RX_IN

RSSI

DISC

FILTERED_AUDIO

ASFIC_MIC_AUD_OUT

HC_CNTL

EXP_AUDIO

9V3

C350

Schematic Diagram for HLF9003, HLF9004A,HLF9009A & HLF9010A Main Board,Hear Clear Section

Page 85: Engineering Gtx

September, 2000 6880906Z19-O 13

Circuit Board Detailsfor HLF9003A & HLF9004A Main Boards

Page 86: Engineering Gtx

14 6880906Z19-O September, 2000

Parts List for HLF9003A & HLF9004A Main Boards

Parts ListHLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

capacitor, fixed: uF +/-15%; 50 V:unless otherwise stated

C100 2113740F41 39 pFC101 thru 103 2113743K15 ceramic 0.1C104 2113741F49 0.01C105 2311049A42 tantalum 3.3 ±10%; 6 VC106 2113743K15 ceramic 0.1C107 2113741F49 0.01C108 2113741F25 1000 pFC109, 110 2113740F41 39 pFC111 2113741F49 0.01C113, 114 2113741F49 0.01C131 2113743K15 ceramic 0.1C132 2311049A07 tantalum 1 ±10%; 16 VC133 thru 135 2113743K15 ceramic 0.1C136, 137 2113740F41 39 pFC146 2113740F36 24 pFC151 2113743K15 ceramic 0.1C200 2113743K15 ceramic 0.1C201 2113740F41 39 pFC202 2113741F17 470 pFC203, 204 2113740F41 39 pFC205 2113743F08 ceramic 0.22C206 2113743K15 ceramic 0.1C207 2113743F08 ceramic 0.22C208 2113741F13 330 pFC209 2311049J26 tantalum 10 ±20%; 16 VC210 2113741A53 .022 ±10%C211 2113743A19 0.1 ±10%C212 2113743K15 ceramic 0.1C221 2113743K15 ceramic 0.1C222 2311049A07 tantalum 1 ±10%; 16 VC223 2113741A57 33 nFC224 2311049J11 tantalum 4.7 ±10%; 16 VC225 2113741F49 0.01C226 2113743K15 ceramic 0.1C227 2311049J44 tantalum 47 ±20%; 10 VC228 2311049A01 tantalum 0.1 ±10%; 35 VC229 2113741F49 0.01C230 2311049J11 tantalum 4.7 ±10%; 16 VC231 2113741F49 0.01C232 2311049J26 10C233 2113740F39 33 pFC234 2113743K15 ceramic 0.1C237 2113741A57 .033C241 thru 243 2113740F41 39 pFC251 2113743K15 ceramic 0.1C252 2311049J23 tantalum 10 ±10%; 7 VC253 2311049A07 tantalum 1 ±10%; 16 VC254 2113743K15 ceramic 0.1C300 2113743A23 0.220C350 2113743A19 100 nFC351, 352 2113741F17 470 pFC353 2311049A04 0.33C354 2113741F49 0.01C355, 356 2311049A42 tantalum 3.3 ±10%; 6 VC357 2113741F49 0.01C358 2311049A04 0.33C360, 361 2113743K15 ceramic 0.1C362 2113743A19 100 nFC363, 364 2113741A33 3300 pFC365 2113743K15 ceramic 0.1C367 2113741A33 3300 pFC374 2113741F49 0.01C401 2113743K15 ceramic 0.1C402 2113741F37 3.3 nFC404 2311049J44 tantalum 47 ±20%; 10 VC405, 406 2113741F25 1000 pFC407, 408 2113741F49 0.01C409 2109720D14 ceramic 0.1; low DISTC410 2113740F41 39 pFC411 2113741F49 0.01C412, 413 2113740F41 39 pFC414 2113741F25 1000 pFC415, 416 2113740F41 39 pFC418 2311049J11 tantalum 4.7 ±10%; 16 VC419 2311049J44 47C421 thru 423 2113740F41 39 pFC425 thru 427 2113740F41 39 pFC431 2113740F41 39 pFC442 2113740F41 39 pFC451 2113740F41 39 pFC460 2311049A09 tantalum 2.2 ±10%; 20 V

C601 2113740F41 39 pFC602 2109720D14 ceramic 0.1; low DISTC603 2380090M24 10 ±20%; 50 V SMTC604 2311049J40 tantalum 33 ±20%; 16 VC605 2109720D14 ceramic 0.1; low DISTC611 2311049C05 tantalum 47 ±10%; 16 VC612 2113743K15 ceramic 0.1C613 2113740F41 39 pFC621 2113740F41 39 pFC622 2311049J44 tantalum 47 ±20%; 10 VC631 2109720D14 ceramic 0.1; low DISTC632 2311049J40 tantalum 33 ±20%; 16 VC633 2113743E07 22 nFC634 2311049J44 tantalum 47 ±20%; 10 VC635 2109720D14 ceramic 0.1; low DISTC641 2113743K15 ceramic 0.1C642 thru 652 2113740F41 39 pFC701 thru 703 2113740F41 39 pFC711, 712 2113743K15 ceramic 0.1C713 2113740F41 39 pFC722, 723 2113740F41 39 pFC724 2113743K15 ceramic 0.1C725, 726 2113740F41 39 pFC727 2113743K15 ceramic 0.1C731 2113743K15 ceramic 0.1C741 2113740F41 39 pFC5200 2113740F35 22 pFC5201 2113740F14 3 pFC5202 2113740F31 15 pFC5203, 5204 2113743K15 ceramic 0.1C5205 2113740F34 20 pFC5208 2113743K15 ceramic 0.1C5211 2113740F32 16 pFC5212 2113740F30 13 pFC5213 2113740F40 36 pFC5214 2113740F17 3.9 pFC5223 2113743K15 ceramic 0.1C5224 2113741F29 1500 pFC5225 2311049A11 tantalum 3.3 ±10%; 16 VC5226 2113743K05 ceramic .039C5227 2311049J11 tantalum 4.7 ±10%; 16 VC5228 2113743K15 ceramic 0.1C5229 2113740F41 39 pFC5231 2311049A05 tantalum 0.47 ±10%; 25 VC5233 2113740F41 39 pFC5234 2113743K15 ceramic 0.1C5235 thru 5237 2113740F41 39 pFC5239 2113740F41 39 pFC5251 2311049A57 10C5252 2113743K15 ceramic 0.1C5308 2113740F23 6.8 pFC5310 2113740F41 39 pFC5311 2113741F49 0.01C5312 2113740F14 3 pFC5321, 5322 2113740F41 39 pFC5323 thru 5326 2113741F49 0.01C5404 2113740F37 27 pFC5700 2113743E07 ceramic .022C5701, 5702 2113743K15 ceramic 0.1C5703 2113740F08 1.6 pFC5704 2113740F09 1.8 pFC5705 thru 5708 2113740F41 39 pFC5709 thru 5711 2113740F51 100 pFC5712, 5713 2311049J26 tantalum 10 ±20%; 16 VC5714 thru 5717 2311049J11 tantalum 4.7 ±10%; 16 VC5718 2311049A14 tantalum 4.7 ±10%; 20 VC5719 2311049J11 tantalum 4.7 ±10%; 16 VC5720 thru 5731 2113743K15 ceramic 0.1C5732 thru 5735 2113743E07 ceramic 22 nFC5737 thru 5743 2113743E07 ceramic 22 nFC5744 thru 5747 2109720D01 ceramic 10 nF; low DISTC5748 2113741F49 0.01C5750 2105248W02 1.2 nFC5751 2113741A57 33 nFC5752 thru 5776 2113740F41 39 pFC5778, 5779 2113740F41 39 pFC5782 2113740F15 3.3 pFC5783 2113740F05 1.2 pFC5784, 5785 2113740F11 2.2 pFC5786 2113740F12 2.4 pFC5787, 5788 2113740F51 100 pF side, entryC5789 2113740F12 2.4 pFC5790 2113740F13 2.7 pF

C5791 2113740F03 1 pFC5792, 5793 2113740F11 2.2 pFC5794 2113740F41 39 pFC5795 2113740F51 100 pFC5796 thru 5799 2109720D14 ceramic 0.1; low DISTC5802, 5803 2109720D14 ceramic 0.1; low DISTC5804 thru 5806 2113743K15 ceramic 0.1C5810, 5811 2113740F41 39 pFC5813, 5814 2113740F41 39 pFC6501 2113743K15 ceramic 0.1C6502 2113740F05 1.2 pFC6503 2113740F41 39 pFC6505, 6506 2113740F41 39 pFC6507 2113743K15 ceramic 0.1C6508 thru 6510 2113741F49 0.01C6511 thru 6513 2311049A01 tantalum 0.1 ±10%; 35 VC6514 thru 6516 2311049A08 tantalum 1 ±10%; 35 VC6517 thru 5719 2113740F41 39 pFC6520 2113740F11 2.2 pFC6522 2113740F41 39 pFC6523 2113740F24 7.5 pFC6524 2113743E07 ceramic .022C6525 2113741F25 1000 pFC6526 2113740F41 39 pFC6529 2113740F41 39 pFC6532 thru 6535 2113740F41 39 pFC6537 2113740F41 39 pFC6538 2113741F49 .01C6539 2113742B22 10 pFC6540 2113742B23 12 pFC6541, 6542 2113742B22 10 pFC6545 2113741F49 .01C6546 2311049A01 tantalum 0.1 ±10%; 35 VC6548 2113741F49 .01C6549, 6550 2113743K15 ceramic 0.1C6551 2113741F49 .01C6552, 6553 2311049A08 1C6554 2113740B39 39 pFC6555 2111078B45 130 pFC6563 2111078A15 2.7 pFC6564 2113741F25 1000 pFC6565, 6566 2311049A01 tantalum 0.1 ±10%; 35 VC6567, 6568 2113742B23 12 pFC6569 2113743K15 ceramic 0.1C6570, 6571 2113740F41 39 pF

diode: (see note 1)CR150, 151 4813833C02 dual 70 V common cathodeCR721 4813833C02 dual 70 V common cathodeCR5700 4802233J09 triple SOT 143-RHCR5701, 5702 4862824C01 varactorCR6501 4813833C02 dual 70 V common cathodeCR6502, 6503 4802482J02 pin diode SMDCR6508 4813832B35 transient suppressor SMTCR6509 4805218N57 dual Schottky common cathodeD101, 102 4813833C02 dual 70 V common cathodeD200 4813833C02 dual 70 V common cathodeD401, 402 4880939T01 silicon SMTD403 4813833C02 dual 70 V common cathodeD611 4813833C02 dual 70 V common cathodeD621 4813833C02 dual 70 V common cathodeD631 4813833C02 dual 70 V common cathodeD5201 4880154K03 dual SchottkyD5303 4880154K03 dual Schottky

fuse:F401 6585711L05 63 V, 500 mA SMT

filter:FL5201 9185747L01 455 kHz ceramic filterFL5202 9180098D14 455 kHz ceramic filterFL5203, 5204 9102603S25 938 MHz ceramic filter

hybrid:H6501 0108704H03 matching hybridH6502 5185807L01 harmonic filter hybrid

connector, receptacle:J100 0902636Y01 flexible cable, side entryJ400 2804503J01 accessory 16-pinJ6500 3080562V01 power cableJ6501 0905901V06 antennaJ6502 3080562V01 power cable

coil, rf:L131, 132 2462587Q40 inductor 270 nH 10%

L200 2462587P30 inductor 33 uH 10%L403 thru 413 2402601S05 inductor BLM21A05L414 thru 416 2484657R01 ferrite beadL418 2402601S05 inductor BLM21A05L419 2484657R01 ferrite beadL420 thru 428 2402601S05 inductor BLM21A05L429, 430 2484657R01 ferrite beadL431 thru 434 2402601S05 inductor BLM21A05L435 2484657R01 ferrite bead 5%L5201 2462587M19 inductor 1200 nH 5%, low PROL5203 2462587T30 inductor 1.0 uHL5211 2483411T74 inductor 1.2 mHL5302 2413926E09 inductor 6.8 nH 5%L5321 2460591A01 inductor 4.2 nHL5322 2462587T12 inductor 56 nH 5%, low PROL5401, 5402 2483411T69 inductor 0.47 mHL5700 thru 5704 2462587T30 inductor 1.0 uH 5%, low PROL5705, 5706 2462587T17 inductor 150 nH 5%, low PROL5707 2462587T30 inductor 1.0 uH 5%, low PROL5708 2462587T17 inductor 150 nH 5%, low PROL5709 2462587Q44 inductor 560 nH 10%L6501 2462587T13 inductor 68 nH 5%, low PROL6502 2460591A11 inductor 7.66 nH air woundL6503 2462587T13 inductor 68 nH 5%, low PROL6504 thru 6506 2484657R01 ferrite beadL6507 2484562T01 inductor 2.5 nHL6508 2484657R01 ferrite beadL6509 2460591R53 inductor 82 nHL6510 2484657R01 ferrite beadL6511 2462587T13 inductor 68 nH 5%, low PROL6512 2460591E24 inductor 23.75 nH air woundL6513 2460591A01 inductor 4.2 nHL6514 thru 6517 2462587T13 inductor 68 nH 5%, low PROL6518, 6519 2484657R01 ferrite beadL6521 2409348J03 inductor 3.85 nHL6522, 6523 2460591R53 inductor 82 nH air wound

transistor: (see note 1)Q101 thru 103 4880048M01 NPN DTC144EKQ141 4880048M01 NPN DTC144EKQ150 4882033T01 NPN DTC114YKQ200 4880214G02 NPN MMBT3904Q401 4880214G02 NPN MMBT3904Q410, 411 4880048M01 NPN DTC144EKQ415 4880494U01 PNP DTA144EKAQ450 4880048M01 NPN DTC144EKQ460, 461 4880048M01 NPN DTC144EKQ601 4880214G02 NPN MMBT3904Q611 4805128M27 PNP BSR33Q612 4880214G02 NPN MMBT3904Q731 4880214G02 NPN MMBT3904Q741 4880048M01 NPN DTC144EKQ742 4805128M27 PNP BSR33Q5201 4813827A07 NPN MMBR941T1Q5230 4813824A17 PNP 3906LQ5301 4813827A18 NPN MRF9411LT1Q5700 4880048M01 NPN DTC144EKQ5701 4813824A17 PNP 3906LQ5702 thru 5704 4809527E01 NPN RF NE85663Q5705 4804188K01 NPN RF NE85634Q5706, 5707 4809527E01 NPN RF NE85663Q6501 4813827A26 NPN RF MRF8372Q6505 4880225C20 NPN RF MRF847Q6506 4813824B01 NPN 2222AT1

resistor, fixed: +/-5%; 1/8 W:unless otherwise stated

R100 0662057A65 4.7kR101 thru 103 0662057B05 200kR104 0662057A89 47kR105 0662057A65 4.7kR106 0662057A73 10kR107 0662057A57 2.2kR108 0662057A73 10kR109, 110 0662057A35 270 ohmR111, 112 0662057A65 4.7kR113 0662057A85 33kR114 0662057A93 68kR115, 116 0662057A73 10kR121 0662057A65 4.7kR122 0662057A89 47kR123 0662057A73 10kR126 0662057A73 10kR127 0662057A65 4.7k

R131 0662057A65 4.7kR132 0662057A81 22kR133 0662057A97 100kR135, 136 0662057A73 10kR142 0662057A73 10kR145 0662057A73 10kR146, 147 0662057A35 270R150 0662057A89 47kR151 0662057B05 200kR152 0662057A56 2kR153 0662057A85 33kR155 0662057A89 47kR200 0662057A73 10kR201 0662057A97 100kR202, 203 0662057A73 10kR204 0662057A25 100 ohmR205 0662057A49 1kR206 0662057A41 470 ohmR208, 209 0662057A73 10kR210 0662057A49 1kR221 0662057B47 0 ohmR222 0662057A89 47kR223 0662057R92 47.5k ±1%; 1/10 WR232 0662057A93 68kR233 0662057A73 10kR236 0662057A97 100kR237, 238 0662057A93 68kR251, 252 0662057R92 47.5k ±1%; 1/10 WR350 0662057G13 100kR351 0662057A81 22kR352 0662057R92 47.5kR353 0662057A53 1.5kR354 0662057G13 100kR355 0662057R30 1kR356 0662057R60 10.0kR357 0662057A97 100kR401 0662057A65 4.7kR402 0662057A49 1kR404, 405 0662057A73 10kR406 0662057A81 22kR411 0662057A73 10kR412 0662057A65 4.7kR417 0662057A97 100kR418 0662057B05 200kR419 0662057A25 100 ohmR420 0662057A97 100kR421 0662057A43 560 ohmR422, 423 0662057A65 4.7kR424 0662057A43 560 ohmR425, 426 0662057A73 10kR427 0662057A97 100kR428 0662057A73 10kR430 0662057A65 4.7kR431 0662057A73 10kR433 0662057A65 4.7kR435 0662057A43 560 ohmR440 0662057A65 4.7kR442 0662057A89 47kR449 0662057A85 33kR450, 451 0662057A65 4.7kR452 0662057A73 10kR460 0662057B05 200kR461 0662057A89 47kR462 0662057B05 200kR463 0662057B22 1MR464 0662057B14 470kR465, 466 0662057A65 4.7kR467, 468 0662057A73 10kR601 0662057A73 10kR602 0662057R55 7.50k ±1%; 1/10 WR603 0662057R31 1.21kR604 0662057A69 6.8kR605 0662057A81 22kR606 0662057B47 0 ohmR611 0662057A51 1.2kR612, 613 0662057C87 3.3kR614 0662057A49 1kR615, 616 0662057A73 10kR617 0662057C87 3.3kR621 0662057A57 2.2kR631, 632 0662057A01 10 ohmR641 0662057R92 47.5kR642 0662057R67 16.2k

R702 0662057A58 2.4kR703, 704 0662057A81 22kR705 0662057A43 560 ohmR706 0662057A97 100kR711 0662057A81 22kR712 0662057B47 0 ohmR713 0662057A42 510 ohmR714 0662057A25 100 ohmR715 0662057R30 1k ±1%; 1/10 WR716 thru 718 0662057R60 10.0k ±1%; 1/10 WR719 0662057R30 1k ±1%; 1/10 WR720 0662057R60 10.0k ±1%; 1/10 WR721 0662057A67 5.6kR722 0662057A81 22kR723 0662057A97 100kR724 0662057A61 3.3kR725, 726 0662057A73 10kR727 0662057A81 22kR728 thru 731 0662057G13 100k ±1%R732 thru 734 0662057A65 4.7kR736, 737 0662057A65 4.7kR740 0662057A57 2.2kR741, 742 0662057A53 1.5kR743 0662057A49 1kR5201 0662057A76 13kR5202 0662057A85 33kR5203 0662057A69 6.8kR5204 0662057A25 100R5205 0662057A56 2kR5207 0662057B47 0 ohmR5211 0662057A47 820 ohmR5212 0662057A67 5.6kR5221 0662057B01 130kR5223 0662057A70 7.5kR5224 0662057A76 13kR5230 0662057A89 47kR5240 0683962T49 100 ohmR5241 0662057B47 0 ohmR5302 0662057A33 220 ohmR5306 0662057A29 150 ohmR5311, 5312 0662057A76 13kR5321 0662057A33 220 ohmR5322 0662057A01 10 ohmR5323 0662057A36 300 ohmR5324, 5325 0662057A39 390 ohmR5327 0662057B47 0 ohmR5401 0662057A18 51 ohmR5700 0662057A57 2.2kR5703 0662057A73 10kR5704 0662057A37 330 ohmR5705 0662057A73 10kR5706 0662057A42 510 ohmR5707 0662057A61 3.3kR5708, 5709 0662057B05 200kR5710 0662057A73 10kR5711 thru 5713 0662057A65 4.7kR5714 0662057A59 2.7kR5715 0662057A57 2.2kR5716 0662057A58 2.4kR5717 0662057A59 2.7kR5718 0662057A53 1.5kR5724 thru 5727 0662057A42 510 ohmR5728 0662057A37 330 ohmR5729 0662057A29 150 ohmR5731 thru 5733 0662057A25 100 ohmR5734 thru 5736 0662057A18 51 ohmR5737, 5708 0662057A09 22 ohmR5739, 5740 0662057A18 51 ohmR5741 0662057A01 10 ohmR5742 0662057A69 6.8kR5743 0662057A73 10kR5744, 5745 0662057A31 180 ohmR5746 0662057A73 10kR5747 0662057A69 6.8kR5748 0662057A09 22 ohmR5750, 5751 0662057A59 2.7kR5752 0662057A37 330 ohmR5753 0662057A13 33 ohmR5754 0662057A37 330 ohmR5755 0662057A09 22 ohmR5756, 5757 0662057A35 270 ohmR6503 0662057A01 10 ohmR6504 0662057C69 560 ohm

HLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9003 & HLF9004 Radio, 900 MHz, 30 W PL-201021-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

R6505 0662057C27 10 ohmR6506 0662057C69 560 ohmR6508 0683962T17 4.7 ohmR6509 0662057G13 100kR6514 0662057G13 100kR6515 0662057A61 3.3kR6519 0680361L01 therm 47kR6520 1705603W01 shunt, 1.639 mHR6523 thru 6525 0662057A53 1.5kR6526 0662057A01 10R6527, 6528 0662057A43 560R6530 0662057A15 39R6531 0662057A09 22R6532 0662057G13 100kR6540 0680195M25 100R6555 0662057A33 220

switch:S401 4085797L01 2-position

shield:E5700 2602660J02 MMIC shieldE5701 2604668E02 VCO shieldE5702, 5703 2602660J02 buffer shieldE5704 2680524L01 synthesizer shieldSH5201 2605261V01 LNA shieldSH5202, 5203 2605417V01 mixer shieldSH6501 2680567V01 RF power module shield

integrated circuit: (see note 1)U101 5180421V01 MC68HC11K1U102 5108444S61 FLASH memoryU103 5185963A21 SRAMU104 5108444S49 EEPROMU105 5113805A30 1 of 8 DCD/demux 74HC138U106 5113808A07 AND quad 2 INP MC74AC08DU201 5105835U45 ASFICU202 5113819A04 quad op-ampU203 5109522E13 switch SPDTU204 5109781E79 switch SDTU251 5113818A03 dual op-ampU350 5105835U50 hear clear ICU401 5109699X01 audio PAU402 5180173M02 switch SPDTU403 5113818A10 dual op-ampU460 5113818A03 dual op-ampU601 5105625U25 9.3 V regulator LM2941U631 5105469E65 voltage regulator LP2951ACU701 5113819A02 quad op-ampU702 5113811G02 D/A converter 6-bit 4-ch. with SPIU5201 5180207R01 IFICU5211 5185670L01 mixer DBL balancedU5700 5105279V31 16.8 MHz ref. oscillator modeU5701 5105109Z59 MMICU5702 5105457W46 frac-N syntheizerU5703 5113816A07 regulator 5 V 500 mA MC78M05BDTU5704, 5705 4805921T02 switch FMC2U5706, 5707 4804122K04 microstrip line resonatorU6501 5113829D23 890-950 MHz, 18 W, 12.5 VU6502 4805921T02 switch FMC2

Zener diode: (see note 1)VR101 4813830A23 10 V 5%; 225 mW MMBZ5240BLVR410 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR412 4813830A40 33 V 5%; 225 mW MMBZ5257BVR415, 416 4813830A27 14 V 5%; 225 mW MMBZ5244LVR421, 422 4813830A27 14 V 5%; 225 mW MMBZ5244LVR425 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR426, 427 4813830A27 14 V 5%; 225 mW MMBZ5244BVR430 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR431 4813830A27 14 V 5%; 225 mW MMBZ5244LVR441 4813830A40 33 V 5%; 225 MMBZ5257BVR451 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR621 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR641 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR650 14813830A25 12 V 5%; 225 mW MMBZ5242B

crystal: (see note 2)Y5201 9102651Y01 filter 45.1 MHzY5202 9102651Y02 filter 45.1 MHz

notes:1. For optimum performance, diodes, transistors and integrated circuits mustbe ordered by MOTOROLA part numbers.2. When ordering quartz crystal units or ceramic resonators, specify carrierfrequency, crystal (or resonator) frequency, and crystal (or resonator) typenumber.

Y5211 4802653Y01 resonator 44.6450 MHz

Page 87: Engineering Gtx

September, 2000 6880906Z19-O 15

Circuit Board Detailsfor HLF9009A & HLF9010A Main Boards

Page 88: Engineering Gtx

16 6880906Z19-O September, 2000

Parts List for HLF9009A & HLF9010A Main Boards

Parts ListHLF9009A & HLF9010A Radio, 900 MHz, 12 W PL-201022-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9009A & HLF9010A Radio, 900 MHz, 12 W PL-201022-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9009A & HLF9010A Radio, 900 MHz, 12 W PL-201022-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9009A & HLF9010A Radio, 900 MHz, 12 W PL-201022-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9009A & HLF9010A Radio, 900 MHz, 12 W PL-201022-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9009A & HLF9010A Radio, 900 MHz, 12 W PL-201022-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

HLF9009A & HLF9010A Radio, 900 MHz, 12 W PL-201022-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

capacitor, fixed: uF +/-15%; 50 V:unless otherwise stated

C100 2113740F41 39 pFC101 thru 103 2113743K15 ceramic 0.1C104 2113741F49 0.01C105 2311049A42 tantalum 3.3 ±10%; 6 VC106 2113743K15 ceramic 0.1C107 2113741F49 0.01C108 2113741F25 1000 pFC109, 110 2113740F41 39 pFC111 2113741F49 0.01C113, 114 2113741F49 0.01C131 2113743K15 0.1C132 2311049A07 tantalum 1 ±10%; 16 VC133 thru 135 2113743K15 ceramic 0.1C136, 137 2113740F41 39 pFC146 2113740F36 24 pFC151 2113743K15 ceramic 0.1C200 2113743K15 0.1C201 2113740F41 39 pFC202 2113741F17 470 pFC203, 204 2113740F41 39 pFC205 2113743F08 ceramic 0.22C206 2113743K15 ceramic 0.1C207 2113743F08 ceramic 0.22C208 2113741F13 330 pFC209 2311049J26 tantalum 10 ±20%; 16 VC210 2113741A53 .022 ±10%C211, 212 2113743A19 0.1 ±10%C221 2113743K15 ceramic 0.1C222 2311049A07 tantalum 1 ±10%; 16 VC223 2113741A57 33 nFC224 2311049J11 tantalum 4.7 ±20%; 10 VC225 2113741F49 0.01C226 2113743K15 ceramic 0.1C227 2311049J44 tantalum 47 ±20%; 10VC228 2311049A01 tantalum 0.1 ±10%; 35 VC229 2113741F49 0.01C230 2311049J11 tantalum 4.7 ±10%; 16 VC231 2113741F49 0.01C232 2311049J26 10C233 2113740F39 33 pFC234 2113743K15 ceramic 0.1C237 2113741A57 .033C241 thru 243 2113740F41 39 pFC251 2113743K15 ceramic 0.1C252 2311049J23 tantalum 10 ±10%; 7 VC253 2311049A07 tantalum 1 ±10%; 16 VC254 2113743K15 ceramic 0.1C300 2113743A23 0.220C350 2113743A19 100 nFC351, 352 2113741F17 470 pFC353 2311049A04 0.33C354 2113741F49 0.01C355, 356 2311049A42 3.3C357 2113741F49 0.01C358 2311049A04 0.33C360, 361 2113743K15 ceramic 0.1C362 2113743A19 100 nF ±10%C363, 364 2113741A33 3300 pFC365 2113743K15 ceramic 0.1C367 2113741A33 3300 pFC374 2113741F49 0.01C401 2113743K15 ceramic 0.1C402 2113741F37 3.3 nFC404 2311049J44 tantalum 47 ±20%; 10 VC405, 406 2113741F25 1000 pFC407, 408 2113741F49 0.01C409 2109720D14 ceramic 0.1; low DISTC410 2113740F41 39 pFC411 2113741F49 0.01C412, 413 2113740F41 39 pFC414 2113741F25 1000 pFC415, 416 2113740F41 39 pFC418 2311049J11 tantalum 4.7 ±10%; 16 VC419 2311049J44 tantalum 47 ±20%; 10 VC421 thru 423 2113740F41 39 pFC425 thru 427 2113740F41 39 pFC431 2113740F41 39 pFC442 2113740F41 39 pFC451 2113740F41 39 pFC460 2311049A09 tantalum 2.2 ±10%; 20 VC601 2113740F41 39 pF

C602 2109720D14 ceramic 0.1; low DISTC603 2380090M24 10 ±20%; 50 V SMTC604 2311049J40 tantalum 33 ±20%; 16 VC605 2109720D14 ceramic 0.1; low DISTC611 2311049C05 tantalum 47 ±10%; 16 VC612 2113743K15 ceramic 0.1C613 2113740F41 39 pFC621 2113740F41 39 pFC622 2311049J44 tantalum 47 ±10%; 16 VC631 2109720D14 ceramic 0.1C632 2311049J40 tantalum 33 ±20%; 16 VC633 2113743E07 22 nFC634 2311049J44 tantalum 47 ±20%; 16 VC635 2109720D14 ceramic 0.1C641 2113743K15 ceramic 0.1C642 thru 652 2113740F41 39 pFC701 thru 703 2113740F41 39 pFC711 2113743E07 22 nFC712 2113743K15 ceramic 0.1C713, 714 2113740F41 39 pFC722, 723 2113740F41 39 pFC724 2113743K15 ceramic 0.1C725, 726 2113740F41 39 pFC727 2113743K15 ceramic 0.1C731 2113743K15 ceramic 0.1C741 2113740F41 39 pFC5200 2113740F35 22 pFC5201 2113740F14 3 pFC5202 2113740F31 15 pFC5203, 5204 2113743K15 ceramic 0.1C5205 2113740F34 20 pFC5208 2113743K15 ceramic 0.1C5211 2113740F32 16 pFC5212 2113740F30 13 pFC5213 2113740F40 36 pFC5214 2113740F17 3.9 pFC5223 2113743K15 ceramic 0.1C5224 2113741F29 1500 pFC5225 2311049A11 tantalum 3.3 ±10%; 16 VC5226 2113743K05 .039C5227 2311049J11 tantalum 4.7 ±10%; 16 VC5228 2113743K15 ceramic 0.1C5229 2113740F41 39 pFC5231 2311049A05 tantalum 0.47 ±10%; 25 VC5233 2113740F41 39 pFC5234 2113743K15 ceramic 0.1C5235 thru 5237 2113740F41 39 pFC5239 2113740F41 39 pFC5251 2311049A57 10C5252 2113743K15 ceramic 0.1C5308 2113740F23 6.8 pFC5310 2113740F41 39 pFC5311 2113741F49 0.01C5312 2113740F14 3 pFC5321, 5322 2113740F41 39 pFC5323 thru 5326 2113741F49 0.01C5404 2113740F37 27 pFC5700 2113743E07 ceramic .022C5701, 5702 2113743K15 ceramic 0.1C5703 2113740F08 1.6 pFC5704 2113740F09 1.8 pFC5705 thru 5708 2113740F41 39 pFC5709 thru 5711 2113740F51 100 pFC5712, 5713 2311049J26 tantalum 10 ±20%; 16 VC5714 thru 5717 2311049J11 tantalum 4.7 ±10%; 16 VC5718 thru 5731 2311049A14 tantalum 4.7 ±10%; 20 VC5732 thru 5735 2113743E07 ceramic 22 nFC5737 thru 5743 2113743E07 ceramic 22 nFC5744 thru 5747 2109720D01 ceramic 10 nF; low DISTC5748 2113741F49 0.01C5750 2105248W02 1.2 nFC5751 2113741A57 33 nFC5752 thru 5779 2113740F41 39 pFC5782 2113740F15 3.3 pFC5783 2113740F05 1.2 pFC5784, 5885 2113740F11 2.2 pFC5786 2113740F12 2.4 pFC5787, 5788 2113740F51 100 pFC5789 2113740F12 2.4 pFC5790 2113740F13 2.7 pFC5791 2113740F03 1 pFC5792, 5793 2113740F11 2.2 pFC5794 2113740F41 39 pF

C5795 2113740F51 100 pFC5796 thru 5799 2109720D14 ceramic 0.1; low DISTC5802, 5803 2109720D14 ceramic 0.1; low DISTC5804 thru 5806 2113743K15 0.1C5810, 5811 2113740F41 39 pFC5813, 5814 2113740F41 39 pFC6501 2113743K15 ceramic 0.1C6502 2113740F21 5.6 pFC6503 2113740F41 39 pFC6505, 6506 2113740F41 39 pFC6507 2113743K15 ceramic 0.1C6508 thru 6510 2113741F49 0.01C6511 thru 6513 2311049A01 tantalum 0.1 ±10%; 35 VC6514 thru 6516 2311049A08 tantalum 1 ±10%; 35 VC6517 thru 6519 2113740F41 39 pFC6520 2113740F27 10 pFC6523 2113740F31 15 pFC6524 2113743E07 ceramic 22 nFC6525 2113741F25 1000 pFC6526 2113740F27 10 pFC6527 2113740F41 39 pFC6529 2113740F41 39 pFC6532 thru 6538 2113740F41 39 pFC6540 2111078A19 3.9 pFC6541, 6542 2111078A09 1.8 pFC6543 2113742B29 39 pFC6544 2113743K15 ceramic 0.1C6545 2113740F41 39 pFC6546 2113743K15 ceramic 0.1C6549, 6550 2113743K15 ceramic 0.1C6551, 6552 2111078A06 1.5 pFC6553 2111078A17 3.3 pFC6560 2113740F15 3.3 pFC6562 2113740F38 30 pF

diode: (see note 1)CR150, 151 4813833C02 dual 70 V common cathodeCR721 4813833C02 dual 70 V common cathodeCR5700 4802233J09 triple SOT 143-RHCR5701, 5702 4862824C01 varactorCR6501 4813833C02 dual 70 V common cathodeCR6502, 6503 4802482J02 pin diode SMDCR6504 4805129M96 dualCR6506 4805218N57 dualCR6508 4813832B35 transient suppressor SMTCR6509 4805218N57 dualD101, 102 4813833C02 dual 70 V common cathodeD200 4813833C02 dual 70 V common cathodeD401, 402 4880939T01 silicon SMTD403 4813833C02 dual 70 V common cathodeD611 4813833C02 dual 70 V common cathodeD621 4813833C02 dual 70 V common cathodeD631 4813833C02 dual 70 V common cathodeD5201 4880154K03 dual SchottkyD5303 4880154K03 dual Schottky

fuse:F401 6585711L05 6.3 V, 500 mA SMT

filter:FL5201 9185747L01 455 kHz ceramic filterFL5202 9180098D14 455 kHz ceramic filterFL5203, 5204 9102603S25 938 MHz ceramic filter

connector, receptacle:J100 0902636Y01 flexible cable, side entryJ400 2804503J01 accessory 16-pinJ6501 0905901V06 antennaJ6502 0905902V04 connector power

coil, rf:L131, 132 2462587Q40 inductor, 270 nHL200 2462587P30 inductor, 33 uH 10%L403 thru 413 2402601S05 inductor BLM21A05L414 thru 416 2484657R01 ferrite beadL418 2402601S05 inductor BLM21A05L419 2484657R01 ferrite beadL420 thru 428 2402601S05 inductor BLM21A05L429, 430 2484657R01 ferrite beadL431 thru 434 2402601S05 inductor BLM21A05L435 2484657R01 ferrite bead 5%L5201 2462587M19 inductor, 1200 nH 5%, low PROL5203 2462587T30 inductor, 1.0 uH 5%, low PRO

L5211 2483411T74 inductor, 1.2 mH 5%, low PROL5302 2413926E09 inductor, 6.8 nH 5%, low PROL5321 2460591A01 inductor, 4.2 nH 5%, low PROL5322 2462587T12 inductor, 56 nH 5%, low PROL5401, 5402 2483411T69 inductor, 0.47 mH 5%, low PROL5700 thru 5704 2462587T30 inductor, 1.0 uH 5%, low PROL5705, 5706 2462587T17 inductor, 150 nH 5%, low PROL5707 2462587T30 inductor, 1.0 uH 5%, low PROL5708 2462587T17 inductor, 150 nH 5%, low PROL5709 2462587Q44 inductor, 560 nH 10%L6501 2462587T13 inductor, 68 nH 5%, low PROL6502 2460591A11 inductor, 7.66 nH air woundL6503 2462587T13 inductor, 68 nH, 5%, low PROL6504 thru 6506 2484657R01 ferrite beadL6507 2460591R53 inductor, 82 nHL6508 2460591E24 inductor, 23.75 nH air woundL6509 2462587T13 inductor, 68 nH 5%, low PROL6511 2462587T13 inductor, 68 nH 5%, low PROL6513 2460591A11 inductor, 7.66 nH air woundL6514 thru 6517 2462587T13 inductor, 68 nH 5%, low PROL6518 2460591A11 inductor, 7.66 nH air woundL6519 2484657R01 ferrite beadL6520 2460591R53 inductor, 82 nH

transistor: (see note 1)Q101 thru 103 4880048M01 NPN DTC144EKQ141 4880048M01 NPN DTC144EKAQ150 4882033T01 NPN DTC114YKQ200 4880214G02 NPN MMBT3904Q401 4880214G02 NPN MMBT3904Q410 4880048M01 NPN DTC144EKAQ411 4880052M01 NPN RXT_A28_T200Q415 4880494U01 PNP DTA144EKAQ450 4880048M01 NPN DTC144EKAQ460, 461 4880048M01 NPN DTC144EKQ601 4880214G02 NPN MMBT3904Q611 4805128M27 PNP BSR33Q612 4880214G02 NPN MMBT3904Q731 4880214G02 NPN MMBT3904Q741 4880048M01 NPN DTC144EKQ742 4805128M27 PNP BSR33Q5201 4813827A07 NPN MMBR941LT1Q5230 4813824A17 PNP 3906LQ5301 4813827A18 NPN MRF9411LT1Q5700 4880048M01 NPN DTC144EKQ5701 4813824A17 PNP 3906LQ5702 thru 5704 4809527E01 NPN RF NE85633-T2B_R25Q5705 4804188K01 NPN RF NE85634Q5706, 5707 4809527E01 NPN RF NE85633-T2B_R25Q6501 4813827A26 NPN RF MRF8372Q6506 4813824B01 NPN 2222AT

resistor, fixed: +/-5%; 1/8 W:unless otherwise stated

R100 0662057A65 4.7kR101 thru 103 0662057B05 200kR104 0662057A89 47kR105 0662057A65 4.7kR106 0662057A73 10kR107 0662057A57 2.2kR108 0662057A73 10kR109, 110 0662057A35 270R111, 112 0662057A65 4.7kR113 0662057A85 33kR114 0662057A93 68kR115, 116 0662057A73 10kR121 0662057A65 4.7kR122 0662057A89 47kR123 0662057A73 10kR126 0662057A73 10kR127 0662057A65 4.7kR131 0662057A65 4.7kR132 0662057A81 22kR133 0662057A97 100kR135, 136 0662057A73 10kR142 0662057A73 10kR145 0662057A73 10kR146, 147 0662057A35 270R150 0662057A89 47kR151 0662057B05 200kR152 0662057A56 2kR153 0662057A85 33kR155 0662057A89 47k

R200 0662057A73 10kR201 0662057A97 100kR202, 203 0662057A73 10kR204 0662057A25 100 ohmR205 0662057A49 1kR206 0662057A41 470 ohmR208, 209 0662057A73 10kR210 0662057A49 1kR221 0662057B47 0 ohmR222 0662057A89 47kR223 0662057R92 47.5k ±1%; 1/10 WR232 0662057A93 68kR233 0662057A73 10kR236 0662057A97 100kR237, 238 0662057A93 68kR251, 252 0662057R92 47.5k ±1%; 1/10 WR350 0662057G13 100kR351 0662057A81 22kR352 0662057R92 47.5kR353 0662057A53 1.5kR354 0662057G13 100kR355 0662057R30 1kR356 0662057R60 10.0kR357 0662057A97 100kR401 0662057A65 4.7kR402 0662057A49 1kR404, 405 0662057A73 10kR406 0662057A81 22kR411 0662057A73 10kR412 0662057A65 4.7kR417 0662057A97 100kR418 0662057B05 200kR419 0662057A25 100 ohmR420 0662057A97 100kR421 0662057A43 560 ohmR422, 423 0662057A65 4.7kR424 0662057A43 560 ohmR425, 426 0662057A73 10kR427 0662057A97 100kR428 0662057A73 10kR430 0662057A65 4.7kR431 0662057A73 10kR433 0662057A65 4.7kR435 0662057A43 560R440 0662057A65 4.7kR442 0662057A89 47kR449 0662057A85 33kR450, 451 0662057A65 4.7kR452 0662057A73 10kR460 0662057B05 200kR461 0662057A89 47kR462 0662057B05 200kR463 0662057B22 1MR464 0662057B14 470kR465, 466 0662057A65 4.7kR467, 468 0662057A73 10kR601 0662057A73 10kR602 0662057R55 7.50k ±1%; 1/10 WR603 0662057R31 1.21k ±1%; 1/10 WR604 0662057A69 6.8kR605 0662057A81 22kR606 0662057B47 0 ohmR611 0662057A51 1.2kR612, 613 0662057C87 3.3kR614 0662057A49 1kR615, 616 0662057A73 10kR617 0662057C87 3.3kR621 0662057A57 2.2kR631, 632 0662057A01 10 ohmR641 0662057R92 47.5kR642 0662057R67 16.2kR702 thru 704 0662057A81 22kR705 0662057A61 3.3kR706 0662057A97 100kR711 0662057A81 22kR712 0662057A57 2.2kR713 0662057A42 510 ohmR714 0662057A25 100 ohmR715 0662057R30 1k ±1%; 1/10 WR716, 717 0662057R45 3.74k ±1%; 1/10 WR718 0662057R60 10k ±1%; 1/10 WR719 0662057R30 1k ±1%; 1/10 WR720 0662057R60 10k ±1%; 1/10 W

R721 0662057A67 5.6kR722 0662057A81 22kR723 0662057A97 100kR724 0662057A61 3.3kR725, 726 0662057A73 10kR727 0662057A81 22kR728 thru 731 0662057G13 100kR732 thru734 0662057A65 4.7kR736, 737 0662057A65 4.7kR740 0662057A57 2.2kR741, 742 0662057A53 1.5kR743 0662057A49 1kR5201 0662057A76 13kR5202 0662057A85 33kR5203 0662057A69 6.8kR5204 0662057A25 100 ohmR5205 0662057A56 2kR5207 0662057B47 0 ohmR5211 0662057A47 820 ohmR5212 0662057A67 5.6kR5221 0662057B01 130kR5223 0662057A70 7.5kR5224 0662057A76 13kR5230 0662057A89 47kR5240 0683962T49 100 ohmR5241 0662057B47 0 ohmR5302 0662057A33 220 ohmR5306 0662057A29 150 ohmR5311, 5312 0662057A76 13kR5321 0662057A33 220 ohmR5322 0662057A01 10 ohmR5323 0662057A36 300 ohmR5324, 5325 0662057A39 390 ohmR5327 0662057B47 0 ohmR5401 0662057A18 51 ohmR5700 0662057A57 2.2kR5703 0662057A73 10kR5704 0662057A37 330ohmR5705 0662057A73 10kR5706 0662057A42 510R5707 0662057A61 3.3kR5708, 5709 0662057B05 200kR5710 0662057A73 10kR5711 thru 5713 0662057A65 4.7kR5714 0662057A59 2.7kR5715 0662057A57 2.2kR5716 0662057A58 2.4kR5717 0662057A59 2.7kR5718 0662057A53 1.5kR5724 thru 5727 0662057A42 510 ohmR5728 0662057A37 330 ohmR5729 0662057A29 150 ohmR5731 thru 5733 0662057A25 100 ohmR5734 thru 5736 0662057A18 51 ohmR5737, 5738 0662057A09 22 ohmR5739, 5740 0662057A18 51 ohmR5741 0662057A01 10 ohmR5742 0662057A69 6.8kR5743 0662057A73 10kR5744, 5745 0662057A31 180R5746 0662057A73 10kR5747 0662057A69 6.8kR5748 0662057A09 22 ohmR5750, 5751 0662057A59 2.7kR5752 0662057A37 330 ohmR5753 0662057A13 33 ohmR5754 0662057A37 330 ohmR5755 0662057A09 22 ohmR5756, 5757 0662057A35 270 ohmR6502 0662057A09 22 ohmR6503 0662057A01 10 ohmR6504 0662057A42 510 ohmR6505 0662057A49 1kR6506 0662057A09 22 ohmR6512 0662057A25 100 ohmR6514, 6515 0662057A61 3.3kR6519 0680361L01 therm 47kR6520 1705603W01 shunt, 1.639 mHR6523 thru 6525 0662057A53 1.5kR6526 0662057A01 10 ohmR6527, 6528 0662057A43 560 ohmR6531, 6532 0662057A25 100 ohmR6537 thru 6539 0662057A17 47 ohm

R6555 0662057A33 220 ohm

switch:S401 4085797L01 2-position

shield:SH5201 2605261V01 LNA shieldSH5202 2605417V01 mixer shieldSH5203 2605417V01 IF amplifier shieldE5700 2602660J02 MMIC shieldE5701 2604668E02 VCO shieldE5702, 5703 2602660J02 buffer shieldE5704 2680524L01 synthesizer shield

integrated circuit: (see note 1)U101 5180421V01 MC68HC11K1U102 5108444S61 FLASH memoryU103 5185963A21 SRAMU104 5108444S49 EEPROMU105 5113805A30 1 of 8 DCD/demux 74HC138AU106 5113808A07 AND quad 2 INP MC74AC08DU201 5105835U45 ASFICU202 5113819A04 quad op-ampU203 5109522E13 switch, SPDTU204 5109781E79 switch, SPDTU251 5113818A03 dual op-ampU350 5105835U50 hear clear ICU401 5109699X01 audio PAU402 5180173M02 switch SPDTU403 5113818A10 dual op-ampU460 5113818A03 dual op-ampU601 5105625U25 9.3 V regulator LM2941U631 5105469E65 voltage regulator LP2951ACU701 5113819A02 quad op-ampU702 5113811G02 D/A converter 6-bit 4-ch. with SPIU5201 5180207R01 IFICU5211 5185670L01 mixer DBL balancedU5700 5105279V31 16.8 MHz ref. oscillatorU5701 5105109Z59 MMICU5702 5105457W46 frac-N sythesizerU5703 5113816A07 regulator 5 V 500 mA MC78M05BDTU5704, 5705 4805921T02 switch FMC2U5706, 5707 4804122K04 microstrip line resonatorU6501 5113829D23 890-950 MHz, 18 W; 12.5 VU6502 4805921T02 switch FMC2

Zener diode: (see note 1)VR101 4813830A23 10 V 5%; 225 mW MMBZ5240BLVR410 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR412 4813830A40 33 V 5%; 225 mW MMBZ5257BVR415, 416 4813830A27 14 V 5%; 225 mW MMBZ5244LVR421, 422 4813830A27 14 V 5%; 225 mW MMBZ5244LVR425 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR426, 427 4813830A27 14 V 5%; 225 mW MMBZ5244BVR430 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR431 4813830A27 14 V 5%; 225 mW MMBZ5244LVR441 4813830A40 33 V 5%; 225 mW MMBZ5257BVR451 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR621 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR641 4813830A14 5.1 V 5%; 225 mW MMBZ5231BVR650 4813830A25 12 V 5%; 225 mW MMBZ5242B

crystal: (see note 2)Y5201 9102651Y01 filter 45.1 MHzY5202 9102651Y02 filter 45.1 MHz

notes:

must be ordered by Motorola part numbers.1. For optimum performance, diodes, transistors, and integrated circuits

2. When ordering quartz crystal units or ceramic resonators, specify carrierfrequency, crystal (or resonator) frequency, and crystal (or resonator) typenumber.

Y5211 4802653Y01 resonator 44.6450 MHz

Page 89: Engineering Gtx

September, 2000 6880906Z19-O 17

1C

ON

TR

OLL

ER

VOLUME DOWN

15

J101

12

4

HM

18

3

8

2

10

MON

MENU

9

17

J901

MIC3

J903

7

J902

16

14

11

FLEX

SEL

SCAN

6

13

PHONE

VOLUME UP

LED

5

ON OFF

(POT)

CALL

ON/OFF

DISPLAY UNCATALOGED !!!

6

ANALOG_19

ANALOG_3

ANALOG_28

NUC973C972

NU

VR908

C971

5.1V

U970

21

3

NU

10K

R941

Q941

2.2K

R98247K

R970

200K

R973

200KR971

FLT_A+

FLT_A+

0

R980

200KR981

1K

R902

VR993

CR925

14V

C904NU

C903NU

R9264.7K

D941

yellow

0.01UFC935

R933

100K

R958

4.7K

0.1UFC934

20K

R951

1 2

3 4

5 6

FLT_A+

FLT_A+

GOLD_SW_6P

PB925

TOU

CH

_SW

green

D960

D959green

13

VR909

NU

14

+5V

SPI_DATA_BUF

SPI_CLCK_BUF

LED_CE7

2.2UFC970

HANDSET_AUDIO5

+5V

1

HOOK16

ON_OFF_CONTROL

D965green

D963

D964green

green

green

D961

D962

+5V

green

N.U.R932

Q953

N.U.

R931

+5V

+5V

N.U.

Q951

U970

67

5

8

4

FLT_A+

R95410

12

1M

R974

GND

R919

470K

R972

4.7K

R920

4.7K

R921

4.7K

C911NU

VR0907 5.1v

VR906

C941

5.1v

0.1UF

4.7K

47K

R955

R947R94547K

R94347K

D956green

D955green

D953green

D952green

D951green

yellowD942

R944270

R946

D944

green

270

D943

red

Q942

R918

4.7K

4.7K

R917R916

4.7K

4.7K

R915

OE

Q14

5Q2 6Q3 7Q4 14Q5 13Q6 12Q7 11Q8

9QS

QS_10

1Strobe

VDD

16

8

VSS

U941

Clock3

2Data

15

8

GND

4

2

HANDSET_AUDIO

7

N.C.

3

BUS+

6

HOOK

1

PTT

5

N.C.

R925

MIC_HI

4.7K

D958

green

D957green

greenD954Q944

TP902

Q943

C901470pF

R952

20K

2

INT_SPKR+18

INT_SPKR-

1

LCD_CE11

INT_SPKR+

4.7K

R922

BUS+4

15

2

PTT

+5V10

FLT_A+

C925

NU

C915NU

OUTPUT_B-415

OUTPUT_B-514

OUTPUT_B-613

OUTPUT_B-712

OUTPUT_B-811

OUTPUT_B-9

22

VDD

2

VSS

OUTPUT_B-2

42OUTPUT_B-20

41OUTPUT_B-21

40OUTPUT_B-22

39OUTPUT_B-23

38OUTPUT_B-24

37OUTPUT_B-25

36OUTPUT_B-26

35OUTPUT_B-27

34OUTPUT_B-28

33OUTPUT_B-29

17OUTPUT_B-3

32OUTPUT_B-30

31OUTPUT_B-31

30OUTPUT_B-32

29OUTPUT_B-33

16

N.C18

N.C1

21OSC-IN

20OUTPUT_B-1

10OUTPUT_B-10

9OUTPUT_B-11

8OUTPUT_B-12

7OUTPUT_B-13

6OUTPUT_B-14

5OUTPUT_B-15

4OUTPUT_B-16

3OUTPUT_B-17

44OUTPUT_B-18

43OUTPUT_B-19

19

U932

27BACKPLANE-IN

26BACKPLANE-OUT

24CLOCK-IN

25DATA-IN

N.C28

N.C23

U942

4

5

2

1

3

PB913

GOLD_SW_6P

12

34

56

+5V

TOU

CH

_SW

Q925

R95647K

8

9

24KR957

24

25

26

27

28

29

3

30

31

32

33

34

4

5

6

7

1

10

11

12

13

14

15

16

17

18

19

2

20

21

22

23

4

56

H931

GOLD_SW_6P_SHORT

PB921

TOU

CH

_SW

12

3

R953

10K

VR90314V

Q952

VR90414V

10uFC942

VR901

VR902 5.1v 5.1v

R901

270

TP901

470pF

green

C902

green

D970

FLT_A+

D969

VR90514V

D967green

D966

12

34

56

green

12

34

56

GOLD_SW_6P

PB915

TOU

CH

_SW

4

56

PB918

TOU

CH

_SW

GOLD_SW_6PGOLD_SW_6P

TOU

CH

_SW

PB91712

3

PB916

TOU

CH

_SW

12

34

56

12

34

56

GOLD_SW_6P

12

34

56

PB914

TOU

CH

_SW

GOLD_SW_6P

NC

TOU

CH

_SW

PB922

GOLD_SW_6P_SHORT

NC

NC

NC

NC

NC

NC

INT_SPKR-17

NC

NC

270

R948

R94247K

Schematic Diagramfor FLN8744A Control Head

Page 90: Engineering Gtx

18 6880906Z19-O September, 2000

U942

PB922

PB921

PB925 PB915

H931

PB916

VIEWED FROM SIDE 1

PB917 PB918

PB914

PB913

J903

D943

D964

D944

D94

2

D94

1

D95

3

D95

7

D96

1

D96

5

D96

9

D95

6D

967

D96

3

D95

9

D95

5

D95

1

D95

2D95

4

D95

8

D96

2

D96

6

D97

0

D960

1

1

18

VR907

VR906

CR925

R915

R916

R95

8

C79

3C

791

C911

C915

1

C903

C925

R926

C904

C79

2

+

+

14

5 8

1

6

7 17

18

28VR908

Q941

Q951

R095

Q944

Q942

R943

R945R925

Q925

VR903

R970 TP901

TP902C902

VR905VR902

C970

R974R972

VR904

VR901R982

VR993

C901

R901

Q943R946

R947R932C942

R951

C941

R918

Q952

U970U941

U932

VIEWED FROM SIDE 2

R917

R952

R953

R955

R919R920R921R922

1

8 9

16

VR909

Q953

R931

R941

C934

R933

C93

5

R98

1

R98

0

R94

2

R94

4

R95

7

R95

6

R94

8

R97

3R

902

R97

1

2939

40

J902

J901

Parts ListFLN8744A Control Head Board PL-201002-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

capacitor, fixed: uF +/-5%; 50 V:unless otherwise stated

C970 2311049A09 2.2C901, 902 2113741F17 470 pFC934 2113743K15 ceramic 0.1 pFC935 2113741F49 0.01 pFC941 2113743K15 ceramic 0.1C942 2311049J23 tantalum 10 10%; 7 V

diode: (see note)CR925 4813833C02 dual 70 V common cathode

light emitting diode: (see note)D941, 942 4805729G73 yellowD943 4805729G74 redD944 4805729G75 greenD951 thru 967 4805729G75 greenD969, 970 4805729G75 green

H931 7202662Y01 display_LCD

connector, receptacle:J901 0902636Y01 connector, flex cable, side entryJ902 2809926G01 SMT headerJ903 2805924V01 mic connector

transistor: (see note)Q925 4880048M01 NPN DIG 47k/47kQ941 4880048M01 NPN DIG 47k/47kQ942 thru 944 4813824A10 NPN 40 V 0.2A general purposeQ951 4813824A10 NPN 25 V 5AQ952 4813822A20 NPN_MJD200T4

resistor, fixed: +/-5%; 1/8 W:unless otherwise stated

R955 0662057A65 4.7kR956 0662057A89 47kR957 0662057A82 24kR958 0662057A65 4.7kR970 0662057A89 47kR971 0662057B05 200kR972 0662057B14 470kR973 0662057B05 200kR974 0662057B22 1 Meg.R980 0662057B47 0 ohmR981 0662057B05 200kR982 0662057A57 2.2kR901 0662057C61 270 ohmsR902 0662057A49 1kR915 thru 922 0662057A65 4.7kR925, 926 0662057A65 4.7kR933 0662057A97 100kR941 0662057A73 10kR942, 943 0662057A89 47kR944 0662057C61 270 ohmsR945 0662057A89 47kR946 0662057C61 270 ohmsR947 0662057A89 47kR948 0662057C61 270 ohmsR951 0662057A80 20kR952 0662057A80 20kR953 0662057A73 10kR954 0680194M01 10 ohms

integrated circuit: (see note)U942 1805642V01 potentiameter switchU970 5113818A03 high performance single supplyU932 5105625U61 MM5453VXU941 5113806A35 MC14094B

Zener diode: (see note)VR908 4813830A14 5.1 V 5% 225 mW MMBZ5231BVR901 thru 907 4813830A27 14 V 5% 225 mW MMBZ5244L

note: For optimum performance, diodes, transistors, and integrated circuitsmust be ordered by Motorola part numbers.

VR993 4813830A27 14 V 5% 225 mW MMBZ5244L

Circuit Board Details & Parts List for FLN8744AControl Head

Page 91: Engineering Gtx

September, 2000 6880906Z19-O 19

25

23

78

10

9

11

12

13

24

30

29

14

15

16

1718

19

20

21

22

23

1

4

5

6 2627

28

RPD-20118-0

31

32

GTX Exploded View &Mechanical Parts List, 30 W

Parts ListGTX Mechanical Parts List; 30 W PL-201019-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

1 3605422W02 exterior volume knob2 5480643K01 logo label3 3608147K01 interior volume knob4 1580356K01 housing5 3280511L01 LCD frame gasket6 7580358K01 keypad7 7202631Y01 LCD display8 2802638Y02 connector9 0780360K01 LCD frame10 FLN8744 control head board11 8402618Y01 flexible circuit12 3202620Y01 control head gasket13, 14, 15 0185808L01 assembly, cover16 ---- main board17 0185787M01 PA shield18 0310907A20 mechanical screw, M3x0.5x1819 3080562V02 power cable20 2680567V01 PM shield21 4205938V01 clip spring22 FHN5875 accessory kit23 3202606Y01 accessory connector gasket24 4280587L01 accessory clamp25 2680547V01 chassis26 ---- FCC label27 7585697M01 speaker pad28 2802638Y01 connector29 5080442U02 speaker30, 31, 32 HLN9640 trunnion kit

non-referenced items

54-85743M01 LABEL

Page 92: Engineering Gtx

20 6880906Z19-O September, 2000

25 24

23

23

1

4

5

6

78

10

9

11

12

13

29

14

28

21

15

16

17

18 19

20

22

26

27

RPD-20102-0

GTX Exploded View &Mechanical Parts List, 12 W

Parts ListGTX Mechanical Parts List; 12 W PL-201020-O

REFERENCE MOTOROLASYMBOL PART NO. DESCRIPTION

1 3605422W02 exterior volume knob2 5480643K01 logo label3 3608147K01 interior volume knob4 1580356K01 housing5 3280511L01 LCD frame gasket6 7580358K01 keypad7 7202631Y01 LCD display8 2802638Y02 connector9 0780360K01 LCD frame10 FLN8744 control head board11 8402618Y01 flexible circuit12 3202620Y01 control head gasket13 2680439K01 cover shield14 3202619Y01 cover gasket15 1580355K01 cover assembly16 ---- main board17 2680519K01 PA shield18 0310907A20 mechanical screw, M3x0.5x1019 4205938V01 clip spring20 4280587L01 accessory clamp21 3202606Y01 accessory connector gasket22 FHN5875 accessory kit23 2780354K01 chassis24 ---- FCC label25 7585697M01 speaker pad26 2802638Y01 connector27 5080442U02 speaker28, 29 GLN7317 trunnion kit

Page 93: Engineering Gtx

REPLACEMENT PARTS ORDERINGORDERING INFORMATION

When ordering replacement parts or equipment information, the complete identification number should

be included. This applies to all components, kits, and chassis. If the component part number is not known,

the order should include the number of the chassis or kit of which it is a part, and sufficient description of

the desired component to identify it.

Crystal and channel element orders should specify the crystal or channel element type number, crystal and

carrier frequency, and the model number in which the part is used.

Orders for active filters, Vibrasender and Vibrasponder resonant reeds should specify type number and

frequency, should identify the owner/operator of the communications system in which these items are to

be used, and should include any serial numbers stamped on the components being replaced.

MAIL ORDERS

Send written orders to the following addresses:

TELEPHONE ORDERS

TELEX/FAX ORDERS

Replacement Parts/Test Equipment/Manuals

Crystal Service Items:Motorola Inc.Americas Parts DivisionAttention: Order Processing1313 E. Algonquin RoadSchaumburg, IL 60196

Federal Government Orders:

Motorola Inc.Americas Parts DivisionAttention: Order Processing7230 Parkway DriveLandover, MD 21076

International Orders:

Motorola Inc.Americas Parts DivisionAttention: InternationalOrder Processing1313 E. Algonquin RoadSchaumburg, IL 60196

Americas Parts Division:1-800-826-1913 (For Federal Government Orders)Call: 847-576-80121-847-538-8023 (International Orders)

Americas Parts Division:FAX: 847-538-8198(Domestic)847-576-3023 (International)Parts ID: 847-538-8194Telex: 280127 (Domestic)403305 (International)

Federal Government Orders:FAX: 410-712-4991

PARTS CUSTOMER SERVICE PRODUCT CUSTOMER SERVICE

Americas Parts Division:Call: 1-800-422-4210

Parts Identification:Call: 847-538-0021

Customer Response Center(Sales and Service Assistance):

Call: 1-800-247-2346FAX: 1-800-232-9272

Page 94: Engineering Gtx

Motorola, Inc.Radio Products Group1000 W. Washington St.Mt. Pleasant, IA 52641

Copyright© 2000 Motorola, Inc.All Rights ReservedPrinted In U.S.A.6880906Z19-O