AOC LE32K0D7D(U) Schematic

31.5″ & 42″ LCD TV AOC LE32K0D7D(U)/LE42K0D7D(U)

Service

Service

Service

31~67 KHz

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……..……………….…….……….....10

2.4 Front Panel Control Knobs…….………….……….....11

3. Input/Output Specification…………....................…....12

4. Mechanical Instructions…………………….................14

5. Repair Flow Chart ……………………….…….…….....18

6. PCB Layout ………………..…………………....….......25

SAFETY NOTICE

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

6.1 Main Board…………..……………...…….…….......25

6.2 Power Board………………..…….…….……….......27

6.3 Key Board………………………..……..……….......33

6.4 IR Board………………………….……..……….......33

7. Adjustment……..………………………….................34

8. Block Diagram.…….................................................35

9. Schematic Diagram…..…………....………………...37

9.1 Main Board…………………………………...….......37

9.2 Power Board…………..….….……...………….......54

9.3 Key Board……………….……….…………….........63

9.4 IR Board……...………….……….…………….........65

10. Exploded View………………………………….…...66

11. BOM List……………….………………….………….70

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

LE32K0D7D E32AA2NBWEG12N

LE42K0D7D E42AA2NBWRG12N

A00 Aug.30,2010 Initial release

LE32K0D7DU E32AA2NBWEG22N

LE42K0D7DU E42AA2NBWRG22N

LE32K0D7D E32AA2NBWEG32N

LE42K0D7D E42AA2NBWRG32N

A01 May.13,2011 Add new model

LE32K0D7DU E32AA2NBWEG42N

LE42K0D7DU E42AA2NBWRG42N

3

1. General Specification

Model LE32K0D7D(U) LE42K0D7D(U) LC32K0D3D LC42K0D3D
Screen Size
Resolution

OSD Language

View Angle
Brightness
Video System
Audio System

Speaker Output

Rear Connectors

Side Connectors

Input Voltage
Power Consumption
Standby Power
Consumption
Set Dimension(W X H X D)
(With Base And
Stand)(mm)
Set Dimension(W X H X D)
(W/O Base And
Stand)(mm)
Net Weight (Kg)
Wall Mount Size
Operation Temperature

USB Photo/Music/Video
Supported Formats

32” diagonal 42” diagonal 32” diagonal 42” diagonal

1920 x 1080
Bulgarian, Croatian, Czech, Danish, Dutch, English, Finnish, French,
Gaeilge, German, Greek, Hungarian, Italian, Norwegian, Polish,
Portuguese, Rumanian, Russian, Serbian, Slovakian, Slovenian, Spanish,
Swedish, Turkish, Latvian, Estonian, Lithuanian, Ukrainian

178°(H)/178°(V)

450 cd/m2 450 cd/m2 450 cd/m2 500 cd/m2

PAL/SECAM/DVBT/DVBC

B/G, D/K, I, LL’ B/G, D/K, I, LL’ B/G, D/K, I, LL’ B/G, D/K, I, LL’

10W x 2

Component Video & L/R Audio
Input
EXT(RGB/AV)
SPDIF Output
HDMI

Tuner Input
COMMON INTERFACE
PC IN: D-SUB & PC Audio
Earphone Output
HDMI
USB

≤100W ≤120W ≤115W ≤200W

775 x 563 x 210

775 x 521 x 46 1005 x 651 x 46 779 x 553 x 98 1011 x 650 x 108

10.5 17 12 20

200 x 100mm 200 x 200mm 200 x 200mm 400 x 200mm

Picture JPEG

Audio MP3 MPEG1 Layer 3

Video

Speaker: 8W x 2

Woofer: 10W

220-240V, 50/60Hz

≤0.5W

1005 x 691 x

230

0ºC~35ºC

MPEG1 MPG MPEG-1 Video
MPEG4 AVI, MP4 MPEG-4

10W x 2 10W x 2

Tuner Input
PC IN: D-SUB & PC Audio
Component Video & L/R Audio Input
SCART
SPDIF Output
HDMI

COMMON INTERFACE
AV In
Earphone Output
HDMI
USB

779 x 553 x 251 1011 x 698 x 278

Baseline

Progressive

8~48 KHz

8~576 Kbps

Mono/Stereo

4

2. Operating Instructions

2.1 The Use of Remote Control

5

2.2 To Use the Menus

6

7 8

9

2.3 How to Connect

10

2.4 Front Panel Control Knobs

11

3. Input/Output Specification

3.1 RGB Signal Input

15 - Pin Color Display Signal Cable

Pin No. Description Pin No. Description

1 Red 9 +5V (Supply from PC)

2 Green 10 Sync Ground

3 Blue 11 NC

4 NC 12 Bi-directional data(SDA)

5 Ground 13 H-Sync.

6 Red Ground 14 V-Sync. (VCLK)

7 Green Ground 15 Data clock(SCL)

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 Clock-

13 CEC 14 Reserved (N.C. on device)

15 SCL 16 SDA

17 DDC/CEC Ground 18 +5V Power

19 Hot Plug Detect

12

3.3 Compatible Mode Table

Item H.Freq. (KHz) Mode Resolution V.Freq. (Hz)

1 31.469 IBM VGA 12H 640x480 59.940

2 35.156 VESA 800x600 56.250

3 37.879 VESA 800x600 60.317

4 48.363 VESA 1024x768 60.004

5 44.772 1280x720 59.855

6 47.776 CVT 2.3MA 1280x768 60

7 47.7 VESA 1360x768 60

8 63.981 VESA 1280x1024 60.020

9 65.29 VESA 1680x1050 60

10 66.587 VESA reduced blanking mode 1920x1080 60.0

13

4. Mechanical Instructions

LE32K0D7D(U)

1. Remove the screws to remove the stand ass’y.

2. Remove the screws to remove rear cover.

14

3. Remove the screws to remove bracket, AC cover, main board and power board.

4. Remove the screws to remove IR board, key board, speakers and bracket and separate the panel and bezel.

15

LE42K0D7D(U)

1. Remove the screws to remove the stand ass’y and rear cover.

2. Remove the screws to remove bracket, speakers, main board and power board.

16

3. Remove the screws to remove IR board, key board and bracket and separate the panel and bezel.

17

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

18

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

19

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

20

4. No display

No display (LED white)

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 = 5V?

Yes

Replace the Panel

No

Replace the main board

Power board output＝24V?

Yes

Replace the Panel

Replace the power board

No

21

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

22

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

23

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

24

6. PCB Layout

6.1 Main Board

715G4001M01000005F

25

26

6.2 Power Board

LE32K0D7D(U) 715G4078P01W22003H

27

28 29

LE42K0D7D(U) 715G3899P02L30003H

30