AOC LE32D1440, LE32D1440-20, LE39D1440 Schematic

32″& 39″LED TV AOC LE32D1440/20-LE39D1440/20

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……..……………….…….……….....17

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

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

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

5. Repair Flow Chart ……………………….…….…….....26

6. PCB Layout ………………..………………....….......32

6.1 Main Board……...…………..….…….……….......32

SAFETY NOTICE

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

6.2 Power Board……...…………..….…….……….......34

6.3 IR Board…...…………………………………….......38

6.4 KEY Board…...………………………................….38

7. Adjustment..............................................................39

7.1 WB Adjustment……………………..……...………39

7.2 FW Upgrade.………………………………...………40

8. Block Diagram…..…………....………………...41

9. Schematic Diagram…..…………....………………...43

9.1 Main Board…………..….….……...………….......43

9.2 Power Board…………..….….……...………….......57

9.3 IR Board…...…………….……….…………….........62

9.4 KEY Board…...………………………………….…. .63

10. Exploded View………………………………….…...64

11. BOM List……………….…..…………….………….66

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.

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.)

Revision List

Version Release Date Revision Instructions Customer Model TPV Model

LE32D1440/20 E32D9KNSCHB16NX

A00 Sep. 25, 2013 Initial release

LE39D1440/20 E39D2KNSCHB16NX

1. General Specification

2. Operating Instructions

2.1 The Use of Remote Control

2.2 To Use the Menus

10 11 12 13 14 15 16

2.3 How to Connect

2.4 Front Panel Control Knobs

3. Input / Output Specification

D-Sub, HDMI Digital Connector Pin Assignments

D-Sub HDMI1 HDMI2

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 Data24

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 Data010 Sync GND 10 TMDS Clock+ 10 TMDS Clock+ 11

12 Bi-directional data (SDA) 12 TMDS Clock- 12 TMDS Clock13 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

HDMI Timing

WXGA Panel FHD Panel Horizontal Vertical

Resolution

640x480@60Hz ● ● 31.469 - 59.94 - 25.175 720x400@70Hz ● ● 31.469 - 70.087 + 28.322

800x600@60Hz ● ● 37.879 + 60.317 + 40 1024x768@60Hz ● ● 48.363 - 60.004 - 65 1280x720@60Hz ● ● 45 + 60 + 74.25

1280x768@60Hz ● ●

1280x1024@60Hz ● ● 63.981 + 60.02 + 108

1360x768@60Hz ● 47.71 + 59.799 + 85.5

1440x900@60Hz

1680x1050@60Hz

HDMI-

DVI

HDMI-

DVI

●

Nominal Sync Nominal Sync

Frequency

(KHz)

47.396

/47.776

55.935

/55.469

64.674 /65.29

Polarity Freq. (Hz) Polarity

+ /-

59.995 /59.87

59.887

/59.901

59.883

/59.954

Nominal Pixel

+ /-

Clock(MHz)

68.25 /79.5

106.5

/88.75

119

/146.25

1920x1080@60Hz ● 66.587 + 59.934 - 138.5

720x480i

59.94/60Hz

● ● 15.75 60 27.03

720x480P

59.94/60Hz

720P 59.94/60Hz ● ● 45 60 74.25

1080i 59.94/ 60Hz ● ● 33.75 60 74.25

1080P 24Hz ● ● 67.5 24 59.4 1080P 60Hz ● ● 67.5 + 60 + 148.5

● ● 31.54 60 27.03

PC timing table(For RGB input)

WXGA Panel Full HD Panel Horizontal Vertical

Resolution

VGA VGA

640x480@60Hz ● ● 31.469 - 59.94 - 25.175

640x480@72Hz 640x480@75Hz

720x400@70Hz ● ● 31.469 - 70.087 + 28.322

800x600@56Hz 800x600@60Hz ● ● 37.879 + 60.317 + 40

800x600@72Hz 800x600@75Hz

1024x768@60Hz ● ● 48.363 - 60.004 - 65

1024x768@70Hz 1024x768@75Hz

1280x720@60Hz ● ● 45 + 60 + 74.25

1280x768@60Hz ● ●

● ● 37.861 - 72.809 - 31.5

● ● 37.5 - 75 - 31.5

● ● 35.156 + 56.25 + 36

● ● 48.077 + 72.188 + 50

● ● 46.875 + 75 + 49.5

● ● 56.476 - 70.069 - 75

● ● 60.023 + 75.029 + 78.75

Nominal Sync Nominal Sync

Frequency

(KHz)

47.396

/47.776

Polarity Freq.(Hz) Polarity

+ /-

59.995 /59.87

Nominal Pixel

Clock(MHz)

68.25 /79.5

1280x1024@60Hz ● ● 63.981 + 60.02 + 108

1360x768@60Hz ● 47.71 + 59.799 + 85.5

1440x900@60Hz ●

1680x1050@60Hz ●

1920x1080@60Hz ● 66.587 + 59.934 - 138.5

55.935

/55.469

64.674 /65.29

+ /-

59.887

/59.901

59.883

/59.954

+ /-

106.5

/88.75

119

/146.25

4. Mechanical Instructions

1. Remove the screws to remove BASE.

2. Remove the screws to remove REAR COVER.

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

4. Remove the screws to remove BKT_ STAND, COVER_HINGE,DECO.

5. Remove the Mylar from PANEL.

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

Replace the main board

Power “On”

Replace the power board

2. Can’t start

Can’t start (LED red)

Power board output＝12/24V?

Yes

Check the power key is under control?

Check the IR receiver is normal?

Replace the power board

Yes

Replace the main board

Yes

Replace the IR board

Replace the main board

Replace the Power board

3. Abnormal display

Abnormal Display

Check the source

Yes

Enter factory mode to do

“EEPROM initial”&“Reset”

Reset the source

Check the main board

Yes

Check the LVDS cable

Yes

Check the panel

Replace the panel

Replace the main board

Replace the LVDS cable

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

Check the backlight is

“On”?

Reinsert or replace the LVDS cable

Check the B/L

signal is available?

Yes

Replace the main board

Replace main board

Panel Vcc = 12V?

Yes

Replace the Panel

Replace the main board

Power board output＝12/24V?

Yes

Replace the Panel

Replace the power board

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?

Reinsert the audio cable or change the TV system

Enter factory mode to do “Reset”

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

Replace the speaker

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