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42 LCD TV AOC L42W665

Service
Service
Service

Horizontal Frequency
31~60kHz

TABLE OF CONTENTS

Description Page Description Page

Table Of Contents......................................................1 6.3.IR Board.......................................................33
Important Safety Notice...................................................2 6.4.Connector Board..........................................34
Revision List........................................................3 6.5.Key Board.....................................................34
1. General Specification...............................................4 7. White-Balance, Luminance Adjustment...................35
2. Operating Instructions.........................................5 8 Block Diagram..................................................37
2.1. The Use Of Remote Control.................................5 9. Schematic.....................................................38
2.2. To Use The Menus............................................6 9.1 Main Board................................................38
2.3. How To Connect..............................................13 9.2. Power Board.............................................54
2.4. Front Panel Control Knobs.................................15 9.3. IR Board....................................................55
3. Input/Output Specification.......................................16 9.4. Key Board.............................................56
4. Mechanical Instructions.........................................18 9.5. Side Board.................................................57
5. Repair Flow Chart ..............................................23 9.6. Audio Board................................................58
6. PCB Layout ....................................................28 10. Exploded View...........................................59
6.1.Main Board....................................................28 11. BOM List.....................................................60
6.2.Power Board..............................................30 12.Different Part List........................................... 88

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

1
42 LCD TV AOC L42W665
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
42 LCD TV AOC L42W665
Revision List

Version Release Date Revision Instructions TPV Model

A00 July-10-07 Initial Release E427AZNS2WA2NN

E427AZNS2WA2NN/
A01 Aug-15-07 Add New BOM
E427AZNK2WA5NN

3
42 LCD TV AOC L42W665
1. General Specification
Items Specification
Panel Type T420XW01 V500 TW AUO
Driving system TFT-LCD AUO Panel
Aspect Ratio 16: 9
Resolutions 1366 x768
Active Area 930.25 (H) x 523.01(V)
LCD Panel Pixel Pitch 0.681 mm (H) X 0.681 mm(V)

Display colors 16.7 million

Panel Typical Brightness: 500 cd/

Panel Typical Contrast 1500:1

Color Temperature Cool / Warm/normal
H-Frequency 31KHz to 60KHz
Input
V-Frequency 50Hz to 75 Hz
TV Standard NTSC/M
TV Function
Color systems NTSC
AV RCA x 1 Audio L/R x 1
S-Video Y ,C x 1 Audio L/R x 1
Video Inputs
COMPONENT Y, Pr/Cr, Pb/Cb x 1 Audio channel L / Rx 1
AUDIO Headphone Mini-jack for stereo (3.5