AOC LE42H057D, LE46H057D Service manual

42″&46″LCD TV AOC LE42(46)H057D

Service

Horizontal Frequency

31~68 KHz

Table of Contents

Description Page

Table of Contents………………………………………....1

Description Page

6.2. Power Board…....................................................41

Important Safety Notice……………………………….…2

Revision List…………………………………..…….……3

1. General Specification...............................…….......4

2. Operating Instructions..............................................6

2.1. The Front Control Panel………..............................6

2.2. Connections……………………..............................7

2.3. Remote Control...................................................8

2.4. Instructions for Use..............................................9

2.5. Visualization Menu...............................................18

3. Input /Output Specification..........……………........20

3.1. Input Signal Connector............……....................20

3.2. Factory Preset Display Modes….........................21

4. Mechanical Instruction…………….………….….....22

5. Repair Flow Chart................................................30

6. PCB Layout...……..............................................37

6.1. Main Board….......................................................37

SAFETY NOTICE

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

6.3. Key Board…........................................................47

6.4. IR Board………....................................................47

6.5. MEMC Board.......…..........................................48

7. Adjustment.....….....................................................50

7.1 White Balance Adjustment…………………………50

7.2. Firmware Instructions .........................................52

7.3. DDC Instructions……..........................................55

8. Block Diagram….....................................................56

9. Schematic Diagram...……......................................57

9.1. Main Board…………............................................57

9.2. Power Board……….............................................72

9.3. Key Board…........................................................84

9.4. IR Board…...........................................................85

9.5. MEMC Board…...................................................86

10. Exploded View…..................................................92

11. BOM List……….………….………………..............96

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

ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service

procedures recommended by AOC and described in this service manual are effective methods of performing service

operations. Some of these 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. AOC 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, AOC has not

undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not

recommended by AOC 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, AOC Company will be referred to as AOC.

WARNING

Use of substitute replacement parts, which do not have the same, specified safety characteristics, might create

shock, fire, or other hazards.

Under no circumstances should the original design be modified or altered without written permission from AOC.

AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.

Servicer assumes all liability.

FOR PRODUCTS CONTAINING LASER:

DANGER-Invisible laser radiations 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.

Take care during handling the LCD module with backlight unit

¾ Must mount the module using mounting holes arranged in four corners.

¾ Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

¾ Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage

to the panel.

¾ Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

¾ Make certain that treatment person’s body is grounded through wristband.

¾ Do not leave the module in high temperature and in areas of high humidity for a long time.

¾ Avoid contact with water as it may a short circuit within the module.

¾ If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth

may damage the panel.)

Revision List

Version Release Date Revision Instructions Customer Model TPV Model

E42AATNSWRE6NN

LE42H057D

E42AATNSWRE7NN

A00 Sep.26,2010 Initial Release

E46AATNSWRE6NN

LE46H057D

E46AATNSWRE7NN

1. General Specification

2. Operating Instructions

2.1 The Front Control Panel

2.2 Connections

2.3 Remote Control

2.4 Instructions for Use

10 11 12 13 14 15 16 17

2.5 Visualization Menu

3. Input /Output Specification

3.1 Input Signal Connector

VGA Connector

Pin No. Description Pin No. Description Pin No. Description

1 Red Video 6 Red Ground 11 RXD

2 Green Video 7 Green Ground 12 Serial Data for DDC

3 Blue Video 8 Blue Ground 13 H-Sync.

4 TXD 9 No Pin! 14 V-Sync.

5 Ground 10 Sync Ground 15 Serial Clock for DDC

HDMI Connector

Pin No. Description Pin No. Description Pin No. Description

1 TMDS Data2+ 8 TMDS Data0 Shield 15 SCL

2 TMDS Data2 Shield 9 TMDS Data0- 16 SDA

3 TMDS Data2- 10 TMDS Clock+ 17 DDC/CEC Ground

4 TMDS Data1+ 11 TMDS Clock Shield 18 +5V Power

5 TMDS Data1 Shield 12 TMDS Clock- 19 Hot Plug Detect

6 TMDS Data1- 13 CEC

7 TMDS Data0+ 14 NC

11 15

USB Connector

Pin No. Description Pin No. Description

1 VCC 3 DATA+

2 DATA- 4 GND

3.2 Factory Preset Display Modes

4. Mechanical Instructions

1. Remove the screws to remove the base.

2. Remove the screws to remove the rear cover.

For LE42H057D

3. Disconnect the power cord and remove the screw to remove the ground wire.

4. Remove the screws to remove the hinge BKT and AC cover

5. Remove all the connectors.

6. Remove the speakers.

7. Remove the screws to remove the power board, main board and MEMC board.

8. Remove the screws to remove the BKTs.

For LE46H057D

3. Disconnect the power cord and remove the screw to remove the ground wire.

4. Remove the screws to remove the hinge BKT and AC cover

5. Remove all the connectors.

6. Remove the speakers.

7. Remove the screws to remove the power board, main board and MEMC board.

8. Remove the screws to remove the BKTs.

9. Remove the LVDS cables from the panel.

10. The bezel

5. Repair Flow Chart

1. Sin Energía

Sin Energía (LED “Apagado”)

Revise la entrada AC. ¿La energía está en “encendida”?

Salida Power board =5V?

Revise IR board y LED

Reemplace IR board

Enciéndalo

Reemplace power board

Reemplace main board

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