AOC LE32D5520, LE42D5520 Service Manual
32″&42″ LCD TV AOC LE32D5520-LE42D5520
Service
Service
Service
31~60 KHz(Analog)
31~64 KHz(Digital)
TABLE OF CONTENTS
Description Page Description Page
Table of Contents.......……....................................…........1
Important Safety Notice.......................................……......2
Revision List…………………………………………………3
1. General Specification..............................……...…........4
2. Operating Instructions………………...…….……….......5
2.1 The Use of Remote Control…….…..……….…….......5
2.2 To Use the Menus….....………………….…..…….......6
2.3 How to Connect……..……………….…….……….....15
2.4 Front Panel Control Knobs…….………….……….....17
3. Input/Output Specification…………....................…....19
4. Mechanical Instructions…………………….................21
5. Repair Flow Chart ……………………….…….…….....29
6. PCB Layout ………………..………………....….......36
6.1 Main Board…………..……………...…….…….......36
6.2 Power Board……...…………..….…….……….......38
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
6.3 Key Board……………………………………….......44
6.4 IR Board……………………………………….......44
6.5 Daughter Board……………………………….......44
7. Adjustment..............................................................45
7.1 ADC Adjustment....................................................45
7.2 FW Upgrade.………………………………...………46
8. Block Diagram.…….................................................47
9. Schematic Diagram…..…………....………………...49
9.1 Main Board…………………………………...….......49
9.2 Power Board…………..….….……...………….......68
9.3 Key Board……………………………………….......71
9.4 IR Board……………………………………….......72
9.5 Daughter Board……………………………….......73
10. Exploded View………………………………….…...74
11. BOM List……………….………………….………….78
Horizontal Frequency
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
1
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
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-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.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-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.)
2
Revision List
Version Release Date Revision Instructions Customer Model TPV Model
A00 May.10,2012 Initial release LE32D5520 E32CATNSBYB13N
A01 Nov.7,2012 Add new model LE42D5520 E42CATNSBYB16N
3
1. General Specification
Notas:
• Este modelo está em conformidade com as especificações listadas abaixo.
• O design e as especificações estão sujeitas a alterações sem prévio aviso.
• Este modelo pode não ser compatível com as apresentações e/ou especificações que podem ser acrescidas no
futuro.
4
2. Operating Instructions
2.1 The Use of Remote Control
5
2.2 To Use the Menus
6
7
8 9
10 11 12 13 14
2.3 How to Connect
15
16
2.4 Front Panel Control Knobs
17
18
3. Input / Output Specification
3.1 RGB Signal Input
15 - Pin Color Display Signal Cable
Pin No. Description Pin No. Description
1 Red Video 9 No Pin!
2 Green Video 10 Sync Ground
3 Blue Video 11 RXD
4 TXD 12 Serial Data for DDC
5 Ground 13 H-Sync.
6 Red Ground 14 V-Sync.
7 Green Ground 15 Serial Clock for DDC
8 Blue Ground
3.2 HDMI Digital Connector Pin Assignments
Pin No. Description Pin No. Description
1 TMDS Data2+ 2 TMDS Data2 Shield
3 TMDS Data2- 4 TMDS Data1+
5 TMDS Data1 Shield 6 TMDS Data1-
7 TMDS Data0+ 8 TMDS Data0 Shield
9 TMDS Data0- 10 TMDS Clock+
11 TMDS Clock Shield 12 TMDS Clock13 CEC 14 NC
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect
19
3.3 Compatible Mode Table
Analog RGB Input Signal Timing
HDMI Input Signal Timing
20
4. Mechanical Instructions
LE32D5520
1. Remove the screws to remove BASE.
2. Remove the screws to remove COVER HINGE.
21
3. Remove the screws to remove REAR COVER.
4. Remove the screws to remove SPEAKERS, MAIN BOARD and POWER BOARD.
22
5. Remove the screws to remove BKT, AC COVER and IR BOARD.
23
6. The PANEL & The KEY BOARD.
24
LE42D5520
1. Remove the screws to remove BASE.
2. Remove the screws to remove COVER HINGE.
25
3. Remove the screws to remove REAR COVER.
4. Remove the screws to remove SPEAKERS, MAIN BOARD and POWER BOARD.
26
5. Remove the screws to remove BKT.
27
6. The PANEL.
7. The BEZEL.
28
p
5. Repair Flow Chart
1. No power
No power (LED “Off”)
Check the AC input and
the
ower is “ON”?
Yes
Power board output=5V?
Yes
Check the IR board and LED
Replace the IR board
No
Replace the main board
No
Power “On”
No
Replace the power board
29
2. Can’t start
Can’t start (LED red)
Power board output＝24V?
Yes
Check the power key is under control?
No
Check the IR receiver is normal?
No
Replace the power board
Yes
Replace the key board
Yes
Replace the IR board
No
Replace the main board
No
Replace the Power board
30
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