RRU3008 (DC) V2 Hardware Maintenance Guide(Draft a)(PDF)-En

RRU3008 (DC) V2

Hardware Maintenance Guide

Issue Draft A

Date 2011-01-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue Draft A (2011-01-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

i

http://www.huawei.com

mailto:[email protected]

About This Document

PurposeThis document describes routine maintenance procedures for an RRU3008 (DC) V2 (referredto as RRU in this document), such as equipment maintenance and power-on and power-offoperations. It also explains how to replace the RRU and optical modules.

Product VersionThe following table lists the product version related to this document.

Product Name Product Version

DBS3900 GSM V100R013

Intended AudienceThis document is intended for:

l System engineersl Site maintenance engineers

Organization1 Changes in the RRU3008 (DC) V2 Hardware Maintenance Guide

This chapter describes the changes in the RRU3008 (DC) V2 Hardware Maintenance Guide.

2 Preventative Maintenance Items for an RRU

Preventative maintenance for an RRU improves the reliability of the RRU. You are advised toperform scheduled maintenance yearly.

3 Powering On and Off an RRU

During power-on, verify that the voltage and LEDs are normal. An RRU can be powered off ina normal situation or an emergency.

RRU3008 (DC) V2Hardware Maintenance Guide About This Document


iii

4 Replacing an RRU

The RRU, a remote radio unit, forms a distributed base station with the BBU.

5 Replacing an Optical Module

An optical module implements optical-electrical conversion, enabling optical transmissionbetween an RRU and other devices. You must disconnect optical fibers from an optical modulebefore replacing the optical module. Replacing the optical fibers disrupts the transmission ofCPRI signals.

ConventionsSymbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol Description

Indicates a hazard with a high level of risk, which if notavoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if notavoided, could result in equipment damage, data loss,performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or savetime.

Provides additional information to emphasize or supplementimportant points of the main text.

General Conventions

The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are inboldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are inCourier New.

Command Conventions

About This DocumentRRU3008 (DC) V2


iv Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Issue Draft A (2011-01-30)

The command conventions that may be found in this document are defined as follows.


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.

{ x | y | ... }* Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

GUI Conventions

The GUI conventions that may be found in this document are defined as follows.


Boldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder.

Keyboard Operations

The keyboard operations that may be found in this document are defined as follows.

Format Description

Key Press the key. For example, press Enter and press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

RRU3008 (DC) V2Hardware Maintenance Guide About This Document


v

Action Description

Click Select and release the primary mouse button without movingthe pointer.

Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.

Drag Press and hold the primary mouse button and move thepointer to a certain position.

About This DocumentRRU3008 (DC) V2


vi Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.


Contents

About This Document...................................................................................................................iii

1 Changes in the RRU3008 (DC) V2 Hardware Maintenance Guide..................................1-1

2 Preventative Maintenance Items for an RRU.......................................................................2-1

3 Powering On and Off an RRU.................................................................................................3-13.1 Powering On an RRU......................................................................................................................................3-23.2 Powering Off an RRU.....................................................................................................................................3-2

4 Replacing an RRU......................................................................................................................4-1

5 Replacing an Optical Module..................................................................................................5-1

RRU3008 (DC) V2Hardware Maintenance Guide Contents


vii

Figures

Figure 4-1 Loosening captive screws on the main mounting bracket..................................................................4-2Figure 4-2 Tightening screws on the attachment plate.........................................................................................4-2Figure 4-3 Supporting the RRU bottom...............................................................................................................4-3

RRU3008 (DC) V2Hardware Maintenance Guide Figures


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Tables

Table 2-1 Preventative maintenance items for an RRU....................................................................................... 2-1

RRU3008 (DC) V2Hardware Maintenance Guide Tables


xi

1 Changes in the RRU3008 (DC) V2 HardwareMaintenance Guide

This chapter describes the changes in the RRU3008 (DC) V2 Hardware Maintenance Guide.

Draft A (2011-01-30)This is the draft.

Compared with the GSM-BTS V100R012C00, this issue does not add any information.

Compared with the GSM-BTS V100R012C00, this issue does not change any information.

Compared with the GSM-BTS V100R012C00, this issue does not remove any information.

RRU3008 (DC) V2Hardware Maintenance Guide

1 Changes in the RRU3008 (DC) V2 Hardware MaintenanceGuide


1-1

2 Preventative Maintenance Items for an RRU

Preventative maintenance for an RRU improves the reliability of the RRU. You are advised toperform scheduled maintenance yearly.

DANGERWhile working at heights, be careful not to drop any tools, equipment, or other objects. Fallingobjects may cause serious injury or death. Always wear a helmet and avoid standing in the dangerarea.

The items in the following checklist are not mandatory but strongly recommended. Table 2-1lists the preventative maintenance items for an RRU.

Table 2-1 Preventative maintenance items for an RRU

SN Item

1 All RRUs are properly installed and in good condition.

2 The cable seals at the entry points of the cabinet are in good condition.

3 All RF cables are free from wear, cuts, cracks, or other damage.

4 All RF cable connectors are sealed properly.

5 All RF cable conduits are in good condition.

6 All power cables are free from wear, cuts, cracks, or other damage.

7 All power cable connectors are in good condition.

8 All power cable conduits are in good condition.

9 All shield layers of power cables are in good condition.

10 All power cables are sealed properly.

11 All CPRI optical fibers are free from wear, cuts, cracks, or other damage.

12 All screws are tightened on the cover plate of the maintenance cavity.

RRU3008 (DC) V2Hardware Maintenance Guide 2 Preventative Maintenance Items for an RRU


2-1

SN Item

13 All RET cables (optional) are free from wear, cuts, cracks, or other damage.

14 All RET cable (optional) connectors are sealed properly.

15 All alarm cables (optional) are installed and free from any damage.

If any of the statements in the checklist cannot be complied with, perform the followingcorrective actions.

1. Tighten all connections.2. Report any other faults found when filling in the checklist to the supervisor, because only

technically-qualified and trained field engineers are permitted to climb towers for furtherrepairs.

2 Preventative Maintenance Items for an RRURRU3008 (DC) V2


2-2 Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.


3 Powering On and Off an RRU

About This Chapter

During power-on, verify that the voltage and LEDs are normal. An RRU can be powered off ina normal situation or an emergency.

3.1 Powering On an RRUThis describes how to power on an RRU and how to check the running status of the RRU byobserving the status of RRU LEDs.

3.2 Powering Off an RRUThe procedure for powering off an RRU varies with the actual condition, for example, in a normalsituation or an emergency.

RRU3008 (DC) V2Hardware Maintenance Guide 3 Powering On and Off an RRU


3-1

3.1 Powering On an RRUThis describes how to power on an RRU and how to check the running status of the RRU byobserving the status of RRU LEDs.

Prerequisitel The RRU hardware is installed and RRU cable connections are secure.l The input voltage of the RRU ranges from -36 V DC to -57 V DC.

Context

CAUTIONAfter you unpack an RRU, you must power on it within 24 hours. If you power off the RRU formaintenance, you must restore power to the RRU within 24 hours.

Procedure

Step 1 Power on the RRU.

DANGERDo not look into the optical module without eye protection after the RRU is powered on.

Step 2 Keep the RRU running for three to five minutes to check the status of RRU LEDs. For details,see RRU LEDs.

NOTE

If RRUs are cascaded, check the status of all RRU LEDs.

Step 3 Take corresponding actions based on the LED status.

If ... Then ...

The RRU is working properly End the power-on task.

The RRU is faulty Rectify the fault, and then go to Step 1.

----End

3.2 Powering Off an RRUThe procedure for powering off an RRU varies with the actual condition, for example, in a normalsituation or an emergency.

3 Powering On and Off an RRURRU3008 (DC) V2




Procedure

Step 1 Determine whether the RRU is powered off in a normal situation or in an emergency.

If ... Then ...

You must power off the RRU before anequipment swap or an anticipated regionalblackout

Go to Step 2 to power off the RRU in a normalsituation.

You must power off the RRU in anemergency such as a fire, smoke, or waterdamage

Go to Step 3 to power off the RRU in anemergency.

Step 2 Set the corresponding circuit breaker on the auxiliary power device for the RRU to OFF.

NOTE

If RRUs are cascaded, consider the impacts of power-off operations on lower-level RRUs to prevent serviceinterruption.

Step 3 Shut off the external input power of the auxiliary power device for the RRU. If time permits, setthe corresponding circuit breaker on the device to OFF.

----End

RRU3008 (DC) V2Hardware Maintenance Guide 3 Powering On and Off an RRU


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4 Replacing an RRU

The RRU, a remote radio unit, forms a distributed base station with the BBU.

Prerequisitel The electronic labels of boards or modules to be replaced are determined offline on the

M2000 or online on the LMT to determine the model of the boards or modules.

l Tools and materials, such as an ESD wrist strap or ESD gloves, M4 screwdrivers, M6screwdrivers, waterproof tape, and insulation tape, are ready.

l The quantity and model of RRUs to be replaced are confirmed, and new RRUs of the samequantity and model are ready.

Procedure

Step 1 Power off the RRU by referring to 3.2 Powering Off an RRU.

Step 2 Wear an ESD wrist strap or ESD gloves.

CAUTIONTake proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, toprevent electrostatic damage to the boards, modules, or electronic components.

Step 3 Loosen the protection screw on the cover plate of the RRU cabling cavity using an M4 Phillipsscrewdriver, and then push the handle outwards to open the cover plate.

Step 4 Record all the cable connections on the panel of the module to be replaced.

Step 5 Disconnect cables from the ports in the cabling cavity and on the bottom panel.

Step 6 Loosen the captive screws on the two hoist clamps on the main mounting bracket using an M4screwdriver, as shown in Figure 4-1.

NOTEIn scenarios where RRUs are installed in centralized mode, the RRU in the middle can be removed withoutremoving the two RRUs on its right and left sides, in the same procedure as that for removing a single RRU.

RRU3008 (DC) V2Hardware Maintenance Guide 4 Replacing an RRU


4-1

Figure 4-1 Loosening captive screws on the main mounting bracket

Step 7 Tighten the screws on the attachment plate of the RRU using an M6 screwdriver, as shown inFigure 4-2. Use the screw only for removing the RRU, loosen the connection between theattachment plate and the main mounting bracket, and then lift the RRU bottom to remove it, asshown in Figure 4-3.

Figure 4-2 Tightening screws on the attachment plate

4 Replacing an RRURRU3008 (DC) V2




Figure 4-3 Supporting the RRU bottom

CAUTIONWhen removing the RRU, hold the RRU handle with one hand and support the RRU bottomwith the other hand.

Step 8 Tighten the captive screws on the two hoist clamps on the main mounting bracket to 1.4 N·m(12.39 lbf.in.). Install a new RRU and then waterproof the RRU.

Step 9 Reconnect all the cables to be connected to the RRU, and verify that vacant cable troughs in thecabling cavity are blocked by waterproof blocks.

Step 10 Tighten the protection screw on the cover plate to 1.4 N·m (12.39 lbf.in.) using an M4 Phillipsscrewdriver, and then close the cover plate.

Step 11 Power on the RRU by referring to 3.1 Powering On an RRU.

Step 12 Check the operating status of the new RRU by observing the status of RRU LEDs. For detailson the status of LEDs, see RRU LEDs.

Step 13 Take off the ESD wrist strap or gloves, and then pack up all the tools.

----End

Follow-up Procedurel Place the replaced RRU into the ESD box or bag. Then, place the ESD box or bag into a

carton padded with foam or into the packing box of the new RRU.l Fill in the fault form to record detailed information of the replaced components.l Contact the local Huawei office to handle faulty components.

RRU3008 (DC) V2Hardware Maintenance Guide 4 Replacing an RRU


4-3

5 Replacing an Optical Module

An optical module implements optical-electrical conversion, enabling optical transmissionbetween an RRU and other devices. You must disconnect optical fibers from an optical modulebefore replacing the optical module. Replacing the optical fibers disrupts the transmission ofCPRI signals.

Prerequisitel The model and quantity of faulty optical modules are confirmed, and new optical modules

of the same quantity and model are ready.

l Tools and materials, such as an ESD wrist strap or ESD gloves, M4 screwdrivers, and anESD box or bag, are ready.

Contextl Optical modules are inserted into CPRI0 and CPRI1 ports on an RRU.

l Optical modules are hot-swappable.

l It takes about five minutes to replace an optical module of the RRU, which involvesdisconnecting optical fibers, removing the faulty optical module, inserting a new opticalmodule, reconnecting the optical fibers, and waiting for CPRI links to resume.

Procedure

Step 1 Wear an ESD wrist strap or ESD gloves.

CAUTIONTake proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, toprevent electrostatic damage to the boards, modules, or electronic components.

Step 2 Loosen the protection screw on the cover plate of the RRU cabling cavity using an M4 Phillipsscrewdriver, and then push the handle outwards to open the cover plate.

Step 3 Record the connections of the optical module and optical fibers.

RRU3008 (DC) V2Hardware Maintenance Guide 5 Replacing an Optical Module


5-1

If ... Then ...

The faulty optical module is inserted intoCPRI0 port and cables are connected to theDB15 port

Execute Step 4.

In other cases Execute Step 5.

Step 4 Remove the DB15 connector.

Step 5 Press the latch on the optical fiber connector, and then remove the connector from the faultyoptical module.

WARNINGDo not look into the optical fiber or optical module without eye protection after the optical fiberis removed from the optical module.

Step 6 Turn the puller on the faulty optical module outwards, and then pull the puller until the opticalmodule is removed from the RRU.

Step 7 Prepare the optical module of the same model as the faulty optical module according to the labelon the module. Install a new optical module onto the RRU.

NOTEThe optical modules to be installed must match CPRI rates.

Step 8 Insert the optical fiber connector into the new optical module.

Step 9 Check the transmission of CPRI signals by observing the status of CPRI0 and CPRI1 LEDs. Fordetails on the status of LEDs, see RRU LEDs.

Step 10 Reconnect the cables in the cabling cavity.

If ... Then ...

Cables are disconnected from the DB15 portpreviously

Execute Step 11.

In other cases Execute Step 12.

Step 11 Insert the DB15 connector.

Step 12 Tighten the protection screw on the cover plate to 1.4 N·m (12.39 lbf.in.) using an M4 Phillipsscrewdriver, and then close the cover plate.

Step 13 Take off the ESD wrist strap or gloves, and then pack up all the tools.

----End

5 Replacing an Optical ModuleRRU3008 (DC) V2




Follow-up Procedurel Place the replaced optical module into the ESD box or bag. Then, place the ESD box or

bag into a carton padded with foam or into the packing box of the new module.l Fill in the fault form to record detailed information of the replaced components.l Contact the local Huawei office to handle the faulty optical module.

RRU3008 (DC) V2Hardware Maintenance Guide 5 Replacing an Optical Module


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RRU3008 (DC) V2 Hardware Maintenance Guide(Draft a)(PDF)-En