AOC L19AS73 Schematic

19″ LCD TV AOC L19AS73

Service

TABLE OF CONTENTS

Description Page Description Page

Table Of Contents.......……..............................…........1

Important Safety Notice......................................……......2

1. Monitor Specification..................................………........4

2. Operating Instructions……………...……….……….......6

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

2.2 OSD Operations…...………........................…..........8

2.3 Control Knobs and Connection...........……...............13

3. Mechanical Instructions………………...…..................15

4. Repair Flow Chart …………….…………….……….....21

5. White Balance Luminance Adjustment….…….….......26

6. PCB Layout ………….………………….…....….......27

6.1 Main Board.………...................................................27

6.2 Power Board………..…..…..............................29

6.3 Key Board….………..................….......................32

6.4 IR Board……….....….......................... ...... ...... ..32

7. Block Diagram.……….….........................................33

8. Schematic Diagram……………...…………………...34

8.1 Main Board……………..…..………………………..34

8.2 Power Board.............….....................................42

8.3 Key Board….………..................….......................44

8.4 IR Board……….....….......................... ...... ...... ..45

9.Exploded View………………….....................…..46

10.BOM List…............................................................47

11.Different Parts List………………………………....…..61

SAFETY NOTICE

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

CHASSIS 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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19″ LCD TV AOC L19AS73

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.)

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19″ LCD TV AOC L19AS73

Revision List

Version Release Date Revision Instructions TPV Model

A00 Apr-10-2008 Initial Release E197V1NMNWSDNN

A01 May-25-2008 Add new BOM E19731NMNWSXNN

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19″ LCD TV AOC L19AS73

1. Monitor Specification

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19″ LCD TV AOC L19AS73

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19″ LCD TV AOC L19AS73

2. Operations Instructions

2.1 The Use Of Remote Control

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19″ LCD TV AOC L19AS73

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19″ LCD TV AOC L19AS73

2.2 OSD Operations

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19″ LCD TV AOC L19AS73

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19″ LCD TV AOC L19AS73

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19″ LCD TV AOC L19AS73

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19″ LCD TV AOC L19AS73

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19″ LCD TV AOC L19AS73

2.3. Control Knobs and Connection

2.3.1 Front panel control knobs

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19″ LCD TV AOC L19AS73

2.3.2 Back panel connection

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19″ LCD TV AOC L19AS73

3. Mechanical Instructions

Step Figure Description

Lay the

Preparation

Remove the

stand and

base

LCD-TV on a

flat, soft and

clean surface.

Remove the

hinge cover

and the 4

screws

Remove the

back cover

Remove the 6

screws.

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19″ LCD TV AOC L19AS73

Remove

hinge plate

Remove

support bkt

Remove the 7

screws

Remove the

10 screws

Remove

shield

Remove the 7

screws

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19″ LCD TV AOC L19AS73

Remove

speaker

Remove IR

board

Remove the 8

screws

Remove the 2

screws and

connect wire

Remove

key board

Remove pin

Remove the 2

screws

Remove the 7

connect wire

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19″ LCD TV AOC L19AS73

Remove

connect

wire

Remove

main and

power

boards

Remove the 3

connect wire

Remove the 11

screws

Remove

bezel

Remove the 4

screws

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19″ LCD TV AOC L19AS73

Remove

panel

Remove the 4

screws

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