AOC L19AS73 Schematic
19″ LCD TV AOC L19AS73
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Service
Service
Service
TABLE OF CONTENTS
Description Page Description Page
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.
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
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
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
19″ LCD TV AOC L19AS73
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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 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.)
19″ LCD TV AOC L19AS73
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Revision List
Version Release Date Revision Instructions TPV Model
A00 Apr-10-2008 Initial Release E197V1NMNWSDNN
A01 May-25-2008 Add new BOM E19731NMNWSXNN
19″ LCD TV AOC L19AS73
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1. Monitor Specification
19″ LCD TV AOC L19AS73
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19″ LCD TV AOC L19AS73
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2. Operations Instructions
2.1 The Use Of Remote Control
19″ LCD TV AOC L19AS73
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19″ LCD TV AOC L19AS73
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2.2 OSD Operations
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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2.3. Control Knobs and Connection
2.3.1 Front panel control knobs
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2.3.2 Back panel connection
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3. Mechanical Instructions
Step Figure Description
Preparation
Lay the
LCD-TV on a
flat, soft and
clean surface.
Remove the
stand and
base
Remove the
hinge cover
and the 4
screws
Remove the
back cover
Remove the 6
screws.
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Remove
hinge plate
Remove the 7
screws
Remove
support bkt
Remove the
10 screws
Remove
shield
Remove the 7
screws
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Remove
speaker
Remove the 8
screws
Remove IR
board
Remove the 2
screws and
connect wire
Remove
key board
Remove the 2
screws
Remove pin
Remove the 7
connect wire
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Remove
connect
wire
Remove the 3
connect wire
Remove
main and
power
boards
Remove the 11
screws
Remove
bezel
Remove the 4
screws
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Remove
panel
Remove the 4
screws
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