AOC LE32D1442, LE40D1442 Schematic

32”&40″LCD TV AOC LE32D1442/20- LE40D1442/20

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………………...…….……….......6

2.1 The Use of Remote Control…….…..……….…….......6

2.2 To Use the Menus….....………………….…..…….......7

2.3 How to Connect……..……………….…….……….....16

2.4 Front Panel Control Knobs…….………….………....19

3. Input/ Output Specification………....................…....21

4. Mechanical Instructions…………………….................23

5. Repair Flow Chart ……………………….…….…….....29

6. PCB Layout ………………..………………....….......35

6.1 Main Board……...…………..….…….……….......35

SAFETY NOTICE

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

6.2 Power Board……...…………..….…….……….......37

6.3 IR Board…...…………………………………….......43

6.4 KEY Board…...…………………….…................….43

7. Adjustment..............................................................44

7.1 WB Adjustment……………………...……...………44

7.2 FW Upgrade.………………………………...….… 45

8. Block Diagram…..…………....………………...46

9. Schematic Diagram…..…………....………………...48

9.1 Main Board…………..….….……...………….......48

9.2 Power Board…………..….….……...………….......61

9.3 IR Board…...…………….……….…………….........67

9.4 KEY Board…...………………………………….…. .68

10. Exploded View………………………………….…...69

11. BOM List……………….…..…………….………….72

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

Copyright © 2013 by TPV Corporation. All rights reserved. Specifications are subject to change without notice.
No part of this publication may be reproduced in any form or means, without the prior written permission of TPV Corporation.
Otherwise we will reserve the right to investigate the legal responsibility.

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

LE32D1442/20 E32E42NSDNB1NNX

A00 Aug.8, 2013 Initial release

LE40D1442/20 E40E22NSDNB1NNX

3

1. General Specification

4

5

2. Operating Instructions

2.1 The Use of Remote Control

6

2.2 To Use the Menus

7

8

9

10

11

12

13

14

15

2.3 How to Connect

16

17

18

2.4 Front Panel Control Knobs

19

20

3. Input / Output Specification

D-Sub, HDMI Digital Connector Pin Assignments

D-Sub (CN101) HDMI1 (CN502) HDMI2((CN504))

PIN No. Signal PIN No. Signal PIN No. Signal

1 Red 1 TMDS Data2+ 1 TMDS Data2+
2 Green 2 TMDS Data2 shield 2 TMDS Data2 shield
3 Blue 3 TDMS Data2- 3 TDMS Data2-

4
5 GND 5 TMDS Data1 shield 5 TMDS Data1 shield

6 Red GND 6 TMDS Data1- 6 TMDS Data1­7 Green GND 7 TMDS Data0+ 7 TMDS Data0+
8 Blue GND 8 TMDS Data0 shield 8 TMDS Data0 shield
9 +5V (supply from PC) 9 TMDS Data0- 9 TMDS Data0-

10 Sync GND 10 TMDS Clock+ 10 TMDS Clock+
11
12 Bi-directional data (SDA) 12 TMDS Clock- 12 TMDS Clock-

13 H-sync 13 CEC 13 CEC
14 V-sync (vclk) 14 ARC 14 NC

15 Data clock (SCL) 15 SCL 15 SCL
16 SDA 16 SDA
17 DDC_Ground 17 DDC_Ground
18 +5V Power 18 +5V Power
19 Hot Plug Detect 19 Hot Plug Detect
20 SHLD_GND1
21 SHLD_GND2

D/TXDC

D/RXDC

4 TMDS Data1+ 4 TMDS Data1+

11 TMDS Clock Shield 11 TMDS Clock Shield

PC Timing Table(For RGB input)

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

1 31.469 IBM VGA 12H 640x480 59.940
2 37.879 VESA 800x600 60.317
3 48.363 VESA 1024x768 60.004
4 47.7 VESA 1360x768 60
5 63.981 VESA 1280x1024 60.020
6
7

65.29

66.587

VESA 1680x1050

VESA reduced blanking mode 1920x1080

60

60.0

21

HDMI Timing

For Quantum Data setting with QD802BT or QD881 in HDMI mode.)

Item

Pixel rate 148.5MHz

Horizontal
Frequency
Active 1920 pixels

Blank 720 pixels

Period 2640 pixels

Pulse
delay
Pulse
width
Vertical
Frequency
Active 1080 lines

Blank 45 lines

Period 1125 lines

Pulse
delay
Pulse
width
Scan Progressive Progressive Interlace Progressive Progressive Interlace
Sync type ACS / HDTV

Video kind Analog YPbPr

1920X1080P
50Hz

(6.734 ns)

56.25 KHz 28.125 KHz 28.125 KHz 37.5 KHz 31.25 KHz 15.625 KHz

(12.929 us)

(4.848 us)

(17.778 us)
528 pixels
(3.556 us)
44 pixels
(0.296 us)
50 Hz 25 Hz 50 Hz 50 Hz 50 Hz 50 Hz

(19.2 ms)

(0.8 ms)

(20 ms)
4 lines
(0.071 ms)
5 lines
(0.089 ms)

1920X1080P
25Hz

74.25MHz
(13.468 ns)

1920 pixels
(25.859 us)
720 pixels
(9.697 us)

2640 pixels
(35.556 us)
528 pixels
(7.111 us)
44 pixels
(0.593 us)

1080 lines
(38.4 ms)

45 lines
(1.6 ms)
1125 lines
(40 ms)
4 lines
(0.142 ms)
5 lines
(0.178 ms)

1920X1080i
50Hz

74.25MHz
( 13.468ns )

1920 pixels
(25.859 us)
720 pixels
( 9.697 us )

2640 pixels
( 35.556 us )
528 pixels
(7.111 us )
44 pixels
( 0.593 us )

1080 lines
( 38.4 ms )

45 lines
(1.6 ms )
1125 lines
( 40 ms )
2 lines
( 0.071 ms )
5 lines
(0.178 ms )

w/serr & eq

(ITU-R
BT.709)

1280X720P
50Hz

74.25MHz
(13.468 ns)

1280 pixels
(17.239 us)
700 pixels
(9.428 us)

1980 pixels
(26.667 us)
440 pixels
(5.926 us)
40 pixels
(0.539 us)

720 lines
(19.2 ms)

30 lines
(0.8 ms)
750 lines
(20 ms)
5 lines
(0.133 ms )
5 lines
(0.133 ms)

ACS / HDTV
w/serr & eq
Analog YPbPr
(ITU-R
BT.709)

720X576P
50Hz
27 MHz
(37.037 ns)

720 pixels
(26.667 us)
144 pixels
(5.333 us)

864 pixels
(42.000 us)
12 pixels
(0.444 us)
64 pixels
(2.370 us)

576 lines
(18.442 ms)

49 lines
(1.568 ms )
625 lines
(20.000 ms)
5 lines
(0.160 ms)
5 lines
(0.160 ms)

ACS ACS

Analog YPbPr
(SMPTE
RP177)

720X576i
50Hz

13.5MHz
( 74.074 ns )

720 pixels
(53.333 us)
144 pixels
( 10.667
us )
864 pixels
( 64.00 us )
12 pixels
( 0.889 us )
63 pixels
( 4.667 us )

576 lines
( 36.864
ms )
49 lines
(3.136 ms )
625 lines
( 40 ms )
2 lines
( 0.128 ms )
3 lines
(0.192 ms )

Analog
YPbPr
(SMPTE
RP177)

22

4. Mechanical Instructions

LE32D1442/20

1.Remove the screws to remove Stand

2.Remove the screws to remove REAR COVER.

23

3. Disconnect the PINS marked in yellow. Remove the screws marked in red to remove MAIN BOARD,POWER

BOARD,BKT_IO,BKT_STAND,SPEAKER.

4. Remove the screws to remove BKT_SPEAKER,DECO_BEZEL,IR BOARD.

24

5.PANEL.

25

LE40D1442/20

1.Remove the screws to remove Stand

2.Remove the screws to remove REAR COVER.

26

3. Disconnect the PINS marked in yellow. Remove the screws marked in red to remove MAIN BOARD,POWER

BOARD,BKT_IO,BKT_STAND,SPEAKER.

4. Remove the screws to remove BKT_SPEAKER,DECO_BEZEL,IR BOARD.

27

5.PANEL.

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＝12V?

Yes

Check the power key is under control?

No

Check the IR receiver is normal?

No

Replace the power board

Yes

Replace the main board

Yes

Replace the IR board

No

Replace the main board

No

Replace the Power board

30