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42 LCD TV AOC L42H961

Service
Service
Service

Horizontal Frequency
31.5~68 KHz

TABLE OF CONTENTS

Description Page Description Page
Table of Contents.....................................................1 6.2 Power Board..............................................34
Important Safety Notice.............................................2 6.3 Inverter Board............................................40
Revision List......................................................3 6.4 Key Board.................................................40
1.General Specification............................................4 6.5 IR Board...................................................41
2.Operating Instructions........................................5 7.Adjustment....................................................42
2.1 The Use of Remote Control..............................5 8.Block Diagram....................................................45
2.2 To Use the Menu.............................................6 9.Schematic...................................................46
2.3 How to Connect............................................11 9.1 Main Board.................................................46
2.4 Front Panel Control Knobs..............................17 9.2 Power Board..............................................70
3.Input/Output Specification...................................18 9.3 Inverter Board............................................76
4.Mechanical Instructions.....................................20 9.4 Key Board.................................................77
5.Repair Flow Chart ...........................................23 9.5 IR Board...................................................78
6.PCB Layout ....................................................30 10.Exploded View...........................................79
6.1 Main Board...................................................30 11.BOM List....................................................80

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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42 LCD TV AOC L42H961
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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42 LCD TV AOC L42H961
Revision List

Version Release Date Revision Instructions TPV Model

E42RMZNK4WAENN

A00 Jul.17,2009 Initial Release E42RMZNK4WA52N

E42RMZNS4WAENN

E429MZNK4WE6NN

A01 Jan.16,2010 Add new models E429MZNK4WM55N

E429MZNS4WE6NN
Add new models, lead in the new main & power board:
715G3269M01001005K&715G3885P02W30003S E42AAZNK4WE65N
Update are as below
A02 Dec.10,2010 Repair Flow Chart
Main&Power board PCB layout
Main&Power board Schematic Diagram E42AAZNK4WE6NN
BOM List
A03 May.13,2011 Add new model E42AAZNS4WE7NN

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42 LCD TV AOC L42H961
1. General Specification

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42 LCD TV AOC L42H961
2. Operating Instructions
2.1 The Use of Remote Control

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42 LCD TV AOC L42H961
2.2 To Use the Menus

1. Press the MENU/EXIT button to display or close the main menu.
2. Use the Navigation Ring to move around to select, adjust or confirm an item in the OSD (On Screen Display)
menu.
Press the MENU/EXIT button to enter the main OSD. Adjust the items including Video menu, Audio menu,
Feature menu, Channel menu and VGA menu. However, some function items in the menus may only be enabled
in the particular source modes.

Channel Menu
The Channel menu in TV mode shows as below.

1. Tuning Band: Select TV source signal from the Air (antenna) or Cable (CATV).
2. Channel Strength: Show the intensity of the received DTV signal.
3. Auto CH Search: Automatically scan all NTSC / ATSC TV channels and then store in the channel table. In
channel scan process, the OSD can display the number of channels which had been found.
4. Add on CH search: Add channels which are new found.
5. Channels List: Show the channel List. User can edit (add/delete) the channel numbers.
6. Channel Labels: Show the NTSC / ATSC TV channel label menu for user modifying channel labels specifically.
7. FAV Channel Setting: Show the Favorite Channel List. User can edit (add/delete) the favorite channels.

Video Menu

The Video menu in most source modes shows as below. It provides several video adjustment items for user fine
tuning the video display. Only in VGA source mode, the Video menu simply provides Picture Mode, Color Temp,
Backlight, Aspect Ratio and Preset items.

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42 LCD TV AOC L42H961
1. Picture Mode: Adjust the best picture appearance from selecting the preset value of Vivid, Standard,
PWR(Energy savings), Theater, Sport, or Custom.
2. Brightness: Video brightness adjustment, the tuning range is 0 ~ 100.
3. Contrast: Video contrast adjustment, the tuning range is 0 ~ 100.
4. Sharpness: Video sharpness adjustment, the tuning range is 0 ~ 100.
5. Color: Video color chroma adjustment, the tuning range is 0 ~ 100.
6. Tint: Video tint adjustment, the tuning range is R50 ~ G50.
7. Color Temp: Three color temperature modes. (Normal / Warm / Cool)
8. Backlight: Backlight strength adjustment, the tuning range is 0 ~ 30.
9. Aspect Ratio: Choose the display aspect: Auto, Normal, Zoom, Wide, or Cinema mode. (Auto: TV only)
10. Preset: Restore the default video settings.

Audio Menu
The Audio menu in TV mode shows as below. It provides audio adjustment for user to modify the audio setting.
Audio language setting is only available with ATSC TV source, the option is disable under other source modes.

1. Sound Mode: Choose the sound mode: Standard, Movie, News, or Custom.
2. Bass: Bass tone adjustment, the tuning range is 0 ~ 63. (The default state is enabled)
3. Treble: Treble tone adjustment, the tuning range is 0 ~ 63. (The default state is enabled)
4. Balance: Audio balance adjustment, the tuning range is L50 ~ R50.
5. Audio Source: Select the audio source from Mono, Stereo, or SAP. (This function works in ATV only).
6. Audio Language: Change the audio language setting on ATSC TV programs. The number of the supported
audio languages depends on the ATSC TV programs. (English / Fran