AOC Service Manual HP-L1740_A00 Monitor Lcd

Horizontal frequencies30 - 83 kHz

ServiceService

Service

TABLE OF CONTENTS

Published by BCU Monitors Printed in Suzhou Copyright reserved Subject to modification F Nov .11 2004

Description Page

Important Safety Notice---- -------------------------- 2

Technical Data --------------------------------------3~6

Warning Message-------------------------------------11

Factory Mode------------------------------------------12

Installation/On Screen Display-------------------7~10

Definition of pixel defects----------------------------17

Electrical Instructions---------------------------18~19

Failure mode of panel---------------------------------20

Display adjustment-----------------------------------21

Flat Panel adjust--------------------------------------13

Trouble shooting--------------------------------------14

Mechanical Instructions-------------------------15~16

Safety test requirements-----------------------------22

Description Page

Repair tips/Repair Flow chart------------------35~38

Function Block----------------------------------------40

Scaler Diagram----------------------------------41~45

Scaler Board C.B.A------------------------------46~47

Control Diagram & C.B.A.----------------------------48

Power Diagram ----------.-----------------------49~54

Exploded View--------------------------------------- 55

Recommended/Spare parts list----------------56~58

General product specification------------------59~90

Different parts list------------------------------------91

DDC Instructions/DATA-------------------------23~31

ISP Instructions---------------------------------32~34

Wiring Diagram---------------------------------------39

REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES

CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS

AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC

EQUIPMENT CONTAINING HIGH VOLTAGES.

SAFETY NOTICE

SH4 HP L1740

GB 3138 106 10438

17" LCD Colour Monitor

CJ6B50/76CJ6B50/02

Important Safety Notice2 HP L1740

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Proper service and repair isimportant to the safe, reliable

operation of all HPConsumer Electronics Company**

Equipment. The service procedures recommended by HP and

described in this service manual are effective methods of

performing service operations. Some ofthese service

operations require the use of tools specially designed for the

purpose. The special tools should be used when and as

recommended.

It is important to note that this manual contains various

CAUTIONS and NOTICES which should be carefully read in

order to minimize the risk of personal injury to service

personnel. The possibility exists that improper service

methods may damage the equipment. It is also important to

understand that these CAUTIONS and NOTICES ARE NOT

EXHAUSTIVE. HP could not possibly know, evaluate and

advise the service trade of all conceivable ways in which

service might be done or of the possible hazardous

consequences of each way. Consequently, HP has not

undertaken any such broad evaluation. Accordingly, a

servicer who uses a service procedure or tool which is not

recommended by HP must first satisfy himself thoroughly that

neither his safety nor the safe operation of the equipment will

be jeopardized by the service method selected.

* * Hereafter throughout this manual, HP Consumer

Electronics Company will bereferred to as HP.

Critical components having special safety characteristics are

identified with a bythe Ref. No. inthe parts list and

enclosed within a broken line*

(where several critical components are grouped in one area)

along with the safety symbol on the schematics or

exploded views.

Use of substitute replacement parts which do not have the

same specified safety characteristics may create shock, fire,

or other hazards.

Under no circumstances should the original design be

modified or altered without written permission from Philips.

Philips assumes no liability, express or implied, arising out of

any unauthorized modification of design.

Servicer assumes all liability.

* Broken Line

WARNING

Take care during handling the LCD module with backlight

unit

- Must mount the moduleusing mounting holes arranged infour

corners.

- Do not press onthe panel, edge of theframe strongly or electric

shock as this will result in damage to the screen.

- Do not scratch orpress on the panel withany sharp objects, such

as pencil or pen asthis may result in damage to the panel.

- Protect the module fromthe ESD as it maydamage the electronic

circuit (C-MOS).

- Make certain that treatment person s body are grounded through

wrist band.

- Do not leave themodule in high temperature andin areas of high

humidity for a long time.

- Avoid contact with water as it may ashort circuit within the module.

- If the surface ofpanel become dirty, please wipe it off with a soft

material. (Cleaning with a dirty or rough cloth may damage the

panel.)

FOR PRODUCTS CONTAINING LASER :

DANGER- Invisible laser radiation when open.

AVOID DIRECT EXPOSURE TO BEAM.

CAUTION- Use of controls or adjustments or

performance of procedures other than

those specified herein may result in

hazardous radiation exposure.

CAUTION- The use of optical instruments with this

product will increase eye hazard.

TO ENSURE THE CONTINUED RELIABILITY OF THIS

PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S

REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART

NUMBERS IN THE PARTS LIST SECTION OF THIS

SERVICE MANUAL.

3Technical Data HP L1740Go to cover page

"

Technical Data(Continued)4

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HP L1740

2. Electrical characteristics and performanceTest signal and test method in accordance with test instructions sheet161 of the product where applicable.2.1 Actual display size: 337.920 x 270.336 mm2.2 Resolution1.Factory Preset modes (15 modes)

# Resolution H-Frequency

(Hz)

Pixel rate

(MHz)

V-Frequency Comment

1 640X480 31.469K 25.175 59.940 Hz VGA

2 640X480 37.861K 31.5 72.809 Hz VESA

3 640X480 37.5K 31.501 75 Hz VESA

4 720X400 31.469K 28.322 70.087 Hz VGA

5 800X600 37.879K 40 60.317 Hz VESA

6 800X600 48.077K 50 72.188 Hz VESA

7 800X600 46.875K 49.498 75 Hz VESA

8 832X624 49.726K 57.284 74.551 Hz MAC

9 1024X768 48.363K 65 60.004 Hz VESA

10 1024X768 56.476K 75 70.069 Hz VESA

11 1024X768 60.023K 78.75 75.029 Hz VESA

12 1152X870 68.68K 100 75.06 Hz MAC

13 1152X900 71.71K 108 76.05 Hz SUN

14 1280X1024 63.98K 108 60.02Hz VESA

15 1280X1024 79.97K 135 75.02Hz VESA

Over-scan Mode

16 640*480 43.269K 36.000 85.008Hz

2.5

5Technical Data(continued) HP L1740

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2.14

2.13

2.12

Technical Data(Continued)6

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HP L1740

Installation 7HPL 1740

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Rear Panel Components

No Component Function

1 AC power connector Connects the AC power cord to the monitor

2 USB downstream connectors Connects optional USB devices

to the monitor

3 USB upstream connector Connects the USB cable to the host

(computer or another USB hub)

4 DVI connector (available on

select models)

. Connects the DVI -D signal cable to the

monitor

5 VGA connector Connects the VGA cable to the monitor

Connecting the Power Cable

3. For analog operation, connect one end of the VGA signal

cable to the VGA connector on the monitor 1, and the other

end to the VGA connector on the computer 2.

Connecting the VGA Signal Cable

4. Connect the USB cable to the USB upstream connector on themonitor 1 and to a convenient USB connector on the computer 2.

Connecting the USB Cable

On Screen Display8 HP L1740Go to cover page

Front Pan el Controls

No Control Function

1 Auto Adjust Activates the auto adjustment feature for optimum

image

2 Menu Opens the On-Screen Display (OSD) menu

3 (Minus) If OSD is on, press to navigate backward through

the OSD menu features and decrease adjustment

levels.

If OSD is off, press to enable the DVI signal input

(available on select models)

4 + (Plus) If OSD is on, press to navigate forward through the

OSD menu features and increase adjustment

levels

If OSD is off, press to enable the VGA signal input

5 Power Turns the monitor on or off

BASIC OSD MENU LEVEL S

-

On Screen Display 9HPL 1740

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ADVANCED OSD MENU LEVELS

Analog Mode Menu

Menu Level 1 Menu Level 2 Menu Level 3 Factory Reset?

Brightness ADJ Scale Y (90)Contrast ADJ Scale Y (80)

Image Control Auto Adjustment ( Adjusting message) Y (no FD)

Horizontal Position ADJ Scale Y (no FD)

Vertical Position ADJ Scale Y (no FD)

Clock ADJ Scale Y (no FD)

Clock Phase ADJ Scale Y (no FD)

Cancel

Save and Return

Color 9300 K

6500 K Y(FD)

Custom Color Custom Color ADJ

SRGB

Cancel

Save and Return

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