AOC LE32D0330 Schematic

31.5″&39″LCD TV AOC LE32D0330-LE39D0330

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Service

Service

Service

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……..……………….…….……….......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

SAFETY NOTICE

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

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

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

LE32D0330 E32C12NSCQB13NX

A00 Oct.10,2012 Initial release

LE39D0330

E39C22NSCQB13NX

E39C22NSCQB23NX

3

1. General Specification

Refer to User Manual.

4

2. Operating Instructions

2.1 The Use of Remote Control

Refer to User Manual.

5

2.2 To Use the Menus

Refer to User Manual.

6

2.3 How to Connect

Refer to User Manual.

7

2.4 Front Panel Control Knobs

Refer to User Manual.

8

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 Clock­13 CEC 14 NC
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect

9

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

10

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

11

4. Mechanical Instructions

Take LE32D0330 for example.

1. Remove the screws to remove BASE.

2. Remove the screws to remove REAR COVER.

12

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

4. Remove the IR board.

13

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

14

p

p

5. Repair Flow Chart

1. No power

No power (LED “Off”)

Check the AC input and
the

ower is “ON”?

Yes

Power board

out

ut=5.2V?

Yes

Check the IR board and LED

Replace the IR board

No

Replace the main board

No

Power “On”

No

Replace the power board

15

2. Can’t start

Can’t start (LED red)

Power board output＝12/16V?

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

16

3. Abnormal display

Abnormal Display

Check the source

Yes

Enter factory mode to do

“EEPROM initial”&“Reset”

No

No

Reset the source

Check the main board

Yes

Check the LVDS cable

Yes

Check the panel

No

Replace the panel

No

Replace the main board

No

Replace the LVDS cable

17

4. No display

No display (No LED)

Check TV is under control and power
on/off by remote control and power key?

Yes

Check the LVDS cable

Yes

Yes

Check the backlight is

“On”?

No

Reinsert or replace the
LVDS cable

No

No

Check the B/L

signal is available?

Yes

Replace the main board

No

Replace main board

Panel Vcc = 12V?

Yes

Replace the Panel

No

Replace the main board

Power board output＝12/16V?

Yes

Replace the Panel

Replace the power board

No

18

5. Sound problem

No sound or sound abnormal

Check the audio source connection

and the TV system are correct?

Yes

Check the TV is muted, adjust the

volume or enter the menu to reset?

No

No

Reinsert the audio cable or
change the TV system

Enter factory mode to do “Reset”

No

Check the cable between the
speakers and main board is OK?

Yes

Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?

Yes

Replace the cable

Replace the main board

No

No

Replace the speaker

19

6. Remote control malfunction

Remote Control malfunction

Check the remote control battery is
not properly placed or no power?

No

Use the other remote controls

No

Whether the IR board is

abnormal?

No

Replace the main board

Yes

Replace the battery

Yes

Replace the remote control

Yes

Replace the IR board

20

7. OSD is unstable or can’t work normally

OSD is unstable or can’t work normally

Key board connected properly?

Yes

Buttons are OK?

Yes

Key board is OK?

Yes

Enter factory mode to do “Reset”

No

No

No

No

Reconnect the key board

Replace the button function

Replace the key board

Replace the main board

21

6. PCB Layout

6.1 Main Board

715G5091M01000004K

22

23 24

6.2 Power Board

715G5654P01001002M

25

26

6.3 Key Board

715G5668K01001004S

6.4 IR Board

715G5724R01000004S

27

7. Adjustment

(Take other model for example)

ADC Adjustment

1. Factory Mode

Turn on the TV. Press menu key and then press number key 1+9 +9+9+back. It will achieve the factory mode.

2. ADC Adjustment (It’s no need to adjust ADC.)

(1) Enter into the factory mode :(same as the above-mentioned)
(2) Select item “Source”: Ypbpr
a. Tim\pat. (COMPONENT mode: TIM = 314; PAT = 185，select item “auto color” and press ok key.

b. Tim\pat. (COMPONENT mode: TIM = 311; PAT = 185，select item “auto color” and press ok key.
(3) Select item “Source”: VGA

Tim\pat. (VGA mode: TIM = 137; PAT = 42，select item “auto color” and press ok key.

3. White Balance Adjustment

(1) Enter into the factory mode :(same as the above-mentioned).
(2) Just only adjust Ypbpr source.
a. Select item “Source”: Ypbpr and item “Color Temp”: Normal, Adjust gain of RGB to meet spec in the below
setting of Tim\pat. (COMPONENT mode: TIM = 314; PAT = 141(80IRE))
b. Select item “Source”: Ypbpr and item “Color Temp”:Warm, Adjust gain of RGB to meet spec in the below setting
of Tim\pat. (COMPONENT mode: TIM = 314; PAT = 141(80IRE))
c. Select item “Source”: Ypbpr and item “Color Temp”: Cool, Adjust gain of RGB to meet spec in the below setting
of Tim\pat. (COMPONENT mode: TIM = 314; PAT = 141(80IRE))
(3) check VGA TIM137,PAT141, AV TIM304 PAT141, HDMI TIM349 PAT141 , white balance whether or not meet
the specifications.

4.The following color specifications for reference, to RD engineering specifications.

Source VGA /YPbPr /AV/HDMI VGA /YPbPr /AV/HDMI VGA /YPbPr /AV/HDMI

Te mp
x (center)
y (center)

Note: 1、all models of color temperature within specification, but also ensure the brightness conform to
engineering specifications.

2、

RGB gain value cannot exceed 138,128,138.

Warm / 6500K) Normal / (9300K) Cool / (12350K)

0.313  0.02 0.285 0.02 0.270  0.02

0.329  0.02 0.293  0.02 0.273  0.02

28

8. Block Diagram

I2C

U409
M24C32
NVM

H27U2G8F2CTR-BC
2Gb TSOP-48

U405
NA ND FLASH

SUT-RB211TV

TU101

CN101
D-SUB(PC IN)

CN102
PHONE JACK(PC R/L)

CN111
YPB PR +L ,R

CN128
composite

CN103
USB

IF

HDMI1

HDMI2

I2C

U501
HDMI SWITCH

MP3 & JPEG, &MPEG,SW UPD ATE

U406
DEMOD

USB 2.0

VGA

PC A UDIO

YPbPr

CV BS

MT5366
U401

CN408&CN409
LVDS (50/60 Hz)

AOU T_ L
AOU T_ R

AUD IO AMP

U606
HP amplifier

U602
amplifier

LCD PANEL T-CON

SPK R/L

HP R/L

SPK X 2

CN602
HEADPHONE

CN407

29

RCKEY