AOC LE32D0330 User manual

31.5″&39″LCD TV AOC LE32D0330-LE39D0330
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Service
Service
Service
TABLE OF CONTENTS
Description Page Description Page
SAFETY NOTICE
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
6.1 Main Board…………..……………...…….…….......22
6.2 Power Board……...…………..….…….……….......25
6.3 Key Board…...………………………………….......27
6.4 IR Board…...…………………………………….......27
7. Adjustment..............................................................28
8. Block Diagram.…….................................................29
9. Schematic Diagram…..…………....………………...30
9.1 Main Board…………………………………...….......30
9.2 Power Board…………..….….……...………….......46
9.3 Key Board……………….……….…………….........48
9.4 IR Board…...…………….……….…………….........49
10. Exploded View………………………………….…...50
11. BOM List……………….………………….………….52
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……..……………….…….……….......7
2.4 Front Panel Control Knobs…….………….……..….....8
3. Input/ Output Specification………....................….....9
4. Mechanical Instructions…………………….................12
5. Repair Flow Chart ……………………….…….…….....15
6. PCB Layout ………………..………………....…........22
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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.)

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Revision List
Version Release Date Revision Instructions Customer Model TPV Model
A00 Oct.10,2012 Initial release
LE32D0330 E32C12NSCQB13NX
LE39D0330
E39C22NSCQB13NX
E39C22NSCQB23NX

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1. General Specification
Refer to User Manual.

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2. Operating Instructions
2.1 The Use of Remote Control
Refer to User Manual.

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2.2 To Use the Menus
Refer to User Manual.

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2.3 How to Connect
Refer to User Manual.

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2.4 Front Panel Control Knobs
Refer to User Manual.

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3. Input / Output Specification
RGB Signal Input
15 - Pin Color Display Signal Cable
Pin No. Description Pin No. Description
1 Red Video 9 +5V
2 Green Video 10 Sync Ground
3 Blue Video 11 Not Used
4 Not Used 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
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 Clock-
13 CEC 14 NC
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect

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Compatible Mode Table
LE32D0330
HDMI Input Signal Timing
PC Timing
No Resolution H-freq.(kHz) V-freq. (Hz) Pixel clock (MHz)
1 640x480 31.469 59.940 25.175
2 640x480 37.861 72.809 31.500
3 640x480 37.500 75.000 31.500
4 720x400 31.469 70.087 28.322
5 800x600 35.156 56.250 36.000
6 800x600 37.879 60.317 40.000
7 800x600 48.077 72.188 50.000
8 800x600 46.875 75.000 49.500
9 1024x768 48.363 60.004 65.000
10 1024x768 56.476 70.069 75.000
11 1024x768 60.023 75.029 78.750
12 1280x768 47.776 59.870 79.500
13 1360x768 47.712 60.015 85.500
14 1280x1024 63.981 60.020 108.000
Video Timing
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock (MHz)
1 720*480 15.734 60 27
2 720*480 31.5 60 27.00/27.03
3 720*576 15.625 50 27
4 720*576 31.25 50 54
5 1280*720 37.5 50 74.25
6 1280*720 44.96 / 45 59.94 / 60 74.17/74.25
7 1920*1080 33.72 / 33.75 59.94 / 60 74.17/74.25
8 1920*1080 28.125 50 74.25
9 1920*1080 26.97/27 23.97/24 74.17/74.25
10 1920*1080 26.98 25 74.25
11 1920*1080 33.716/33.75 29.976/30.00 74.25
12 1920*1080 56.25 50 148.5
13 1920*1080 67.43/67.5 59.94/60 148.35/148.50

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LE39D0330
HDMI Input Signal Timing
PC Timing
No Resolution H-freq.(kHz) V-freq. (Hz) Pixel clock (MHz)
1 640x480 31.469 59.940 25.175
2 640x480 37.861 72.809 31.500
3 640x480 37.500 75.000 31.500
4 720x400 31.469 70.087 28.322
5 800x600 35.156 56.250 36.000
6 800x600 37.879 60.317 40.000
7 800x600 48.077 72.188 50.000
8 800x600 46.875 75.000 49.500
9 1024x768 48.363 60.004 65.000
10 1024x768 56.476 70.069 75.000
11 1024x768 60.023 75.029 78.750
12 1280x768 47.776 59.870 79.500
13 1360x768 47.712 60.015 85.500
14 1280x1024 63.981 60.020 108.000
15 1280x1024 79.98 75.02 135.000
Video Timing
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock (MHz)
1 720*480 15.734 60 27
2 720*480 31.5 60 27.00/27.03
3 720*576 15.625 50 27
4 720*576 31.25 50 54
5 1280*720 37.5 50 74.25
6 1280*720 44.96 / 45 59.94 / 60 74.17/74.25
7 1920*1080 33.72 / 33.75 59.94 / 60 74.17/74.25
8 1920*1080 28.125 50 74.25
9 1920*1080 26.97/27 23.97/24 74.17/74.25
10 1920*1080 26.98 25 74.25
11 1920*1080 33.716/33.75 29.976/30.00 74.25
12 1920*1080 56.25 50 148.5
13 1920*1080 67.43/67.5 59.94/60 148.35/148.50

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4. Mechanical Instructions
Take LE32D0330 for example.
1. Remove the screws to remove BASE.
2. Remove the screws to remove REAR COVER.

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3. Remove the pins, taps and screws to remove SPEAKERS, MAIN BOARD, KEY BOARD and POWER BOARD.
4. Remove the IR board.

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5. Remove the screws, and then remove the LVDS cable to remove the Panel.

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5. Repair Flow Chart
1. No power
No power (LED “Off”)
Check the AC input and
the
p
ower is “ON”? Power “On”
Check the IR board and LED
Replace the IR board
Replace the main board
Power board
out
p
ut=5.2V? Replace the power board
No
Yes
No
Yes
No

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2. Can’t start
Can’t start (LED red)
Replace the main board
Replace the Power board
No
Yes
No
Yes
No
No
Power board output＝12/16V?
Check the power key is under control?
Check the IR receiver is normal?
Replace the power board
Replace the key board
Yes
Replace the IR board

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3. Abnormal display
Abnormal Display
Reset the source
Check the source
Check the panel
Replace the main board
Replace the LVDS cable
Replace the panel
No
No
No
Yes
Yes
Yes
No
No
Check the main board
Enter factory mode to do
“EEPROM initial”&“Reset”
Check the LVDS cable

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4. No display
Check the B/L
signal is available?
Replace main board
Replace the power board
Panel Vcc = 12V?
Replace the Panel
No display (No LED)
Replace the main board
Check the backlight is
“On”?
Check the LVDS cable
Reinsert or replace the
LVDS cable
Replace the main board
Replace the Panel
No
Yes
Yes No
Yes
No
No
Yes
Yes
No
Yes
No
Power board output＝12/16V?
Check TV is under control and power
on/off by remote control and power key?

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5. Sound problem
No
Check the cable between the
speakers and main board is OK?
No sound or sound abnormal
Check the TV is muted, adjust the
volume or enter the menu to reset?
Reinsert the audio cable or
change the TV system
Replace the cable
Replace the speaker
Replace the main board
No
Yes
Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?
Check the audio source connection
and the TV system are correct?
Yes
No
Yes
No
Enter factory mode to do “Reset”
No

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6. Remote control malfunction
Remote Control malfunction
Replace the battery
Replace the remote control
Whether the IR board is
abnormal?
Yes
No
Replace the IR board
Replace the main board
No
Yes
No
Yes
Use the other remote controls
Check the remote control battery is
not properly placed or no power?