AOC LE32A0320, LE39A0320 Schematic

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31.5Ǝ& 38.5ƎLCD TV AOC LE32A0320-LE39A0320

Service

31~68 KHz

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……..……………….…….……….....13

2.4 Front Panel Control Knobs…….………….……….....15

3. Input/Output Specification…………....................…....16

4. Mechanical Instructions…………………….................18

5. Repair Flow Chart ……………………….…….…….....24

6. PCB Layout ………………..…………………....….......31

6.1 Main Board…………..……………...…….…….......31

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

Horizontal Frequency

TABLE OF CONTENTS

6.2 Power Board……...…………..….…….……….......32

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

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

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

7.1 ADC Adjustment……………………..……...………34

7.2 FW Upgrade.………………………………...………35

8. Block Diagram.……........................................... ......36

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

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

9.2 Power Board…………..….….……...………….......38

9.3 Key Board……………….……….…………….........42

9.4 IR Board……………….……….…………….........43

10. Exploded View………………………………….…...44

11. BOM List……………….………………….………….48

SAFETY NOTICE

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

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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 performin g 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 vario us 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 o r 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 T O 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 da mage 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.)