AOC LE42A5720/61 Schematic

42″ LCD TV AOC LE42A5720/61

Service

Service

Service

31.5~60 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……..……………….…….……….....18

2.4 Front Panel Control Knobs…….………….……….....20

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

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

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

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

SAFETY NOTICE

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

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

6.2 Power Board………………..…….…….……….......35

6.3 Key Board………………………..……..……….......38

6.4 IR Board………………………….……..……….......38

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

8. Block Diagram.…….................................................40

9. Schematic Diagram…..…………....………………...42

9.1 Main Board…………………………………...….......42

9.2 Power Board…………..….….……...………….......51

9.3 Key Board……………….……….…………….........54

9.4 IR Board……...………….……….…………….........55

10. Exploded View………………………………….…...56

11. BOM List……………….………………….………….58

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

A00 Jan.31,2013 Initial Release LE42A5720/61 E42C41NCCHA1NNX

3

1. General Specification

Model

Panel Size

Resolution
TV System
Speaker
Antenna impedance
Input Voltage
Power consumption
Standby power consumption
RF input
Video/Audio terminals
Component input
HDMI input

VGA terminals

USB input
Audio output terminals

Size (W x H x D)
(with base and stand) (mm)
Size (W x H x D)
(without base and stand) (mm)

Weight

12.0Kg (without stand and base)

Wall mount size
Wall-Mount accessory

Operating
conditions

Storage
conditions

Temperature
Humidity
Altitude
Temperature
Humidity
Altitude

Optional accessory and not included in standard package

Note:

1. Designs and specifications are subject to change without notice.

2. This model may not be compatible with features and/or specifications that may be added in the future.

LE42A5720/61

1067mm diagonal

(42" viewable)

1920x1080

PAL D/K,B/G,I;NTSC M

10W x 2

75Ω

100-240V AC,50/60Hz

120W

<1W

RF input x 1

AV input x 1, Video output x 1

Component input x 1

HDMI input x 2

VGA (D-SUB 15 pin) input x 1

PC Audio input x 1

USB input x 1

Headphone output x 1

968 x 641 x 214

968 x 588 x 65

13.1Kg (with stand and base)

400 x 400mm

0ºC to +40ºC

10%~85%

To 3,000m

-10ºC to +50ºC
5%~85%

To 5,000m

4

2. Operating Instructions

2.1 The Use of Remote Control

5

2.2 To Use the Menus

6

7

8

9

10

11

12

13

14

15

16

17

2.3 How to Connect

18

19

2.4 Front Panel Control Knobs

20

3. Input/Output Specification

3.1 RGB Signal Input

15 - Pin Color Display Signal Cable

Pin No. Description Pin No. Description

1 Red Video 9 No Pin

2 Green Video 10 Sync Ground

3 Blue Video 11 SDA(Remote Control)

4 SCL(Remote Control) 12 Serial Data for DDC

5 Ground 13 H-Sync.

6 Red Video Ground 14 V-Sync.

7 Green Video Ground 15 Serial Clock for DDC

8 Blue Video 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 NC

15 SCL 16 SDA

17 DDC/CEC Ground 18 +5V Power

19 Hot Plug Detect

21

3.3 Compatible Mode Table

Default computer mode

Item Resolution

1 640 × 480 31.469 59.94
2 800 × 600 37.879 60.317
3 1024 × 768 48.363 60.004
4 1360 × 768* 47.72 59.799
5 1920 × 1080 66.587 59.934

Default HDMI mode

Item Resolution

1 640 × 480 31.469 59.94
2 800 × 600 37.879 60.317
3 1024 × 768 48.363 60.004
4 1360 × 768* 47.72 59.799
5 1920 × 1080 66.587 59.934

Standard Resolution

SD 720 × 480i 15.734 60
SD 720 × 480p 31.5 60
SD 720 × 576i 15.625 50
SD 720 × 576p 31.25 50
HD 1280 × 720p 37.5 50
HD 1280 × 720p 45 60
HD 1920 × 1080i 28.125 50

HD 1920 × 1080i 33.75 60
FHD 1920 × 1080p 56.25 50
FHD 1920 × 1080p 67.5 60

Horizontal Frequency

(kHz)

Horizontal Frequency

(kHz)

Horizontal Frequency

(kHz)

Vertical

Frequency(Hz)

Vertical

Frequency(Hz)

Vertical Frequency

(Hz)

22

4. Mechanical Instructions

1. Remove the screws to remove the stand, base and rear cover.

2. Remove the tape and pin.

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