AOC LE22A1331-61 Schematic
22″/24″LED TV AOC LE22A1331/61-LE24A1332/61
Service
Service
Service
TABLE OF CONTENTS
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……..……………….…….……….....18
2.4 Front Panel Control Knobs…….………….……….....20
3. Input/ Output Specification………....................…....21
4. Mechanical Instructions…………………….................23
5. Repair Flow Chart ……………………….…….…….....26
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
SAFETY NOTICE
6. PCB Layout ………………..………………....….......32
6.1 Main Board……...…………..….…….……….......32
6.2 Power Board……...…………..….…….……….......34
6.3 IR Board…...…………………………………….......39
7. Adjustment..............................................................40
8. Block Diagram…..…………....………………...41
9. Schematic Diagram…..…………....………………...42
9.1 Main Board…………..….….……...………….......44
9.2 Power Board…………..….….……...………….......51
9.3 IR Board…...…………….……….…………….........55
10. Exploded View………………………………….…...56
11. BOM List……………….……………….………….60
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
Copyright © 2013 by TPV Corporation. All rights reserved. Specifications are subject to change without notice.
No part of this publication may be reproduced in any form or means, without the prior written permission of TPV Corporation.
Otherwise we will reserve the right to investigate the legal responsibility.
1
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
Revision List
Version Release Date Revision Instructions Customer Model TPV Model
A00 Mar.26.2013 Initial release LE22A1331/61
A01 May.16.2013 Add new model LE24A1332/61 E2CC91NCARA1NN
E2AC11NCAPA1NNX
E2AD21NCAPA1NNX
3
1. General Specification
Notes:
• Designs and specifications are subject to change without notice.
• This model may not be compatible with features and/or specifications that may be added in the future.
4
2. Operating Instructions
2.1 The Use of Remote Control
5
2.2 To Use the Menus
You can select signal sources to your AOC TV set directly with your remote controller. You can also press the Input
key in the display menu to
select signal source.
1) Directly select the input signal sources by using
2) Select signal source with the Input key:
How to select on screen Menu items
Note:Some options may be unavailable or hidden according to the different input source and configuration.
6
Picture Setting
Note:Certain screen setups may be unavailable or have different options in accordance with the input
sources.
7
Picture Setting(For PC source only)
Note:
• If the PC is connected to the TV and no signal has been input from the PC for more than 30 seconds,the TV enters
the standby mode automatically.
8
Audio Setup
9
Channel Setup
Note: This setting is only available in TV mode.
Note:Make sure you have connected RF signal cable before performing channel search.
10
Channel Edit description
1. Select Channel Search menu.
2. Select Manual Search and press OK key or ► arrow key to get Manual search sub-menu
3. Select a manual tuning parameter by using arrow.
11
Features Setup
Note:Certain screen setups may be unavailable or have different options in accordance with the input sources.
12
Child Lock Setup
Child lock menu can be accessed by entering 4 digit password through remote control. Initial password is 0000.
13
USB Media Center
TV USB port can be used to view JPEG photos, play mp3 music and Video files, and read text present in USB
devices.
Entering to USB Media:
Press the
Or Press the Source key and ▲/▼ keys on remote and select USB source to get USB Media menu as shown above
Select the Media type (Photo/ Music/ Video/ Text) to be viewed and press OK key to enter into USB Media
and When USB drive is detected by the TV, USB drive is displayed as a folder on the screen as shown below.
Press OK key to view subfolder or files in the USB drive.
Notes:
• Files of selected Media type can only be viewed through USB. Media type can be any one amoung Photo / Music /
Video / Text.
Direct USB key on remote to get USB Media menu as shown above
After entering the multimedia file selection interface, press the Menu button allows you to execute the following
control functions:
1. [Sort]: Sort the multimedia files according to Date or Name.
2. [Media Type]: Select the multimedia file type to playback.
3. [Thumbnail Size]: Select the size of the multimedia file thumbnail.
4. [Copy]: Select the multimedia files to copy.
5. [Paste]: Paste the copied multimedia file.
6. [Delete]: Delete the selected multimedia file.
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Viewing Photos
1. Thumbnail of the available images will be displayed on the screen. If no images are displayed then select the
folder containing the Photos .
2. To select a particular image and to display it in fullscreen press key and press OK key.
Slide show starts automatically when image is viewed in full screen.
3. Press
key to play/pause slideshow. Press to view previous or next image. Press key
to stop slideshow
USB menu settings for Photo Slide show
Press Menu key to get following Menu setup shown above.
1.[Play/Pause]:Play/Pause photo play.
2.[Repeat] : Select the repeat mode as None,Repeat One,Repeat All.
3.[Shuffle]:Select Shuffle mode as Shuffle Off,Shuffle On.
4.[Rotate] : Rotate the select photo by 90° clock wise direction.
5.[Zoom]:Allows you to zoom in on the screen when the playback is paused.
6.[Show Info] : Display the information of the file.
Playing Music files
1. Thumbnail of the available music files will be displayed on the screen. If no files are displayed then select the
folder containing the music files.
2. To play particular music file select the required file and press OK key.
3. Press
key to play/pause music. Press to play previous or next track. Press key to stop
Music play.
USB menu settings for Music play
Press Menu key to get following Menu setup shown above.
1.[Play/Pause]:Play/Pause music play.
2.[Repeat] : Select the repeat mode as None,Repeat One,Repeat All.
3.[Shuffle]:Select Shuffle mode as Shuffle Off,Shuffle On.
4.[Show Info] : Display the information of the file.
5.[Show Spectrum/Hide Spectrum]:select show or hide Spectrum.
6.[Audio Mode]: Select the sound mode as Standard,Personal, Music,Speech,Theater.
7.[Lyric Option]: Select on or off to turn on or off lyric display.
8.[Audio Only] : Select it to turn off dispaly and to get only sound from TV
.
15
Playing Movie files
1. Thumbnail of the available video files will be displayed on the screen. If no files are displayed then select the
folder containing the video files.
2. To play particular video file select the required file and press OK key.
3. Press
video play.
key to play/pause video. Press to play previous or next video. Press key to stop
USB menu settings for Movie play
Press Menu key to get following Menu setup shown above.
1.[Play/Pause]:Play/Pause movie play.
2.[Repeat] : Select the repeat mode as None,Repeat One,Repeat All.
3.[Show Info] : Display the information of the file.
4.[Picture Mode]: Select the picture mode as Vivid,Standard,Movie,Personal,Eco,Sport,Game,Mild.
5.[Zoom]:Select the screen mode as 4:3,Zoom 1,Zoom 2,16:9.
6.[Subtitle]:Select the subtitle mode of the movie.
7.[AudioTrack]:Select the track mode of the audio.
8.[Audio Mode]:Select audio mode Standard,Personal,Music,Speech,Theater.
Reading Text files
1. Thumbnail of the available text files will be displayed on the screen. If no files are displayed then select the folder
containing the text files.
2. To read particular text file select the required file and press OK key.
3. Press ◄/►/▲/▼ keys to browse the text. Press MENU key to stop text read.
USB menu settings for text read
Press Menu key to get following Menu setup shown above.
1.[Play/Pause]:Play/Pause text read.
2.[Repeat]:Select the repeat mode as None,Repeat One,Repeat All.
3.[Shuffle]:Select the shuffle mode as Shuffle Off,Shuffle On.
4.[Show Info]: Display the information of the file.
Formats supported to multimedia mode: Photo, Music, Movie and Text.
16
Remarks:
1. USB interface of digital multimedia player is not all-purpose. So when some USB devices could not be recognized,
the problem is usually
not the performance failure but due to device driver.
2. Because USB devices and memory capability are different, the time needs for multimedia player to read
information are also different. So
the information reading speed of the player temporarily getting slow are not the performance failure.
3. The voltage supplied to USB interface is 5V, and the most electrical current is 500mA. When some interface
criteria of USB devices are
different from standard USB protocol, digital multimedia player may be unable to recognize USB devices correctly,
which is normal status.
4. USB could be used as an interface to update software.
5. If some files source could not play because of the parameter decoding-limitation, the problem is not performance
failure.
6. The system only applies to memory medium with FAT32 and NTFS format.
7.Does not support connecting of removable devices to the USB hub.
8. Does not support displaying of subtitles of video files with subtitles.
9. Does not support thumbnail display of png and Bmp format images.
10. The USB device does not support copying and pasting for NTFS system.
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2.3 How to Connect
You can enjoy standard-definition and high-definition digital programming (if available in your area), along with
standard-definition analog programming.
It is strongly recommended that you connect the antenna/cable input using a 75-ohm coaxial cable to receive
optimum picture quality. A 300- ohm twin lead cable can be easily affected by radio frequency interference, resulting
in signal degradation.
Cable or VHF/UHF(or VHF only)
High Definition Interface
You can enjoy high-definition programming by subscribing to a high-definition cable service or a high-definition
satellite service. For the best possible picture, make sure you connect this equipment to your TV via the HDMI or
component video (with audio) input on the back of your TV.
HDMI Connection
If the equipment has a DVI jack and not an HDMI jack, connect the DVI jack to the HDMI IN (with DVI-to-HDMI cable
or adapter) jack and connect the audio jack to the PC AUDIO IN jacks.
Component Signal Connection
Composite Signal Connection
18
Video Out Signal Connection
PC Connection
Use the TV as a monitor for your PC shown below with the HD15 to HD15 connection. This TV can also be
connected to a PC with DVI or HDMI output.
• Connect the PC IN jack to the PC using the HD15- HD15 cable with ferrite core (analog RGB) and audio cable.
• If the PC is connected to the TV and no signal has been input from the PC for more than 30 seconds, the TV enters
the standby mode automatically.
19
2.4 Front Panel Control Knobs
20
3. Input / Output Specification
RGB Signal Input
15 - Pin Color Display Signal Cable
Pin No. Description Pin No. Description
1 Red Video 9 No Pin!
2 Green Video 10 Sync Ground
3 Blue Video 11 RDA
4 SCL 12 Serial Data for DDC
5 Ground 13 H-Sync.
6 Red Ground 14 V-Sync.
7 Green Ground 15 Serial Clock for DDC
8 Blue Ground
HDMI Digital Connector Pin Assignments
Pin No. Description Pin No. Description
1 TMDS Data2+ 2 TMDS Data2 Shield
3 TMDS Data2- 4 TMDS Data1+
5 TMDS Data1 Shield 6 TMDS Data1-
7 TMDS Data0+ 8 TMDS Data0 Shield
9 TMDS Data0- 10 TMDS Clock+
11 TMDS Clock Shield 12 TMDS Clock13 CEC 14 Reserved(N.C. on device)
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect
21
Compatible Mode Table
22
4. Mechanical Instructions
1. Remove the screws to remove BASE.
2. Remove the screws to remove REAR COVER.
23
3. Disconnect the PINS marked in yellow .Remove the screws marked in red to remove MAIN BOARD,POWER
BOARD,IR BOARD.
4. Disconnect the PINS marked in yellow .Remove the screws to remove BKT_ STAND, BKT_HOLDER.
24
5. Sperate PANEL and BEZEL.
6. BEZEL.
25
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p
5. Repair Flow Chart
1. No power
No power (LED “Off”)
Check the AC input and
the
ower is “ON”?
Yes
Power board
out
ut=5.2V?
Yes
Check the IR board and LED
Replace the IR board
No
Replace the main board
No
Power “On”
No
Replace the power board
26
2. Can’t start
Can’t start (LED red)
Power board output＝12/16V?
Yes
Check the power key is under control?
No
Check the IR receiver is normal?
No
Replace the power board
Yes
Replace the main board
Yes
Replace the IR board
No
Replace the main board
No
Replace the Power board
27
3. Abnormal display
Abnormal Display
Check the source
Yes
Enter factory mode to do
“EEPROM initial”&“Reset”
No
No
Reset the source
Check the main board
Yes
Check the LVDS cable
Yes
Check the panel
No
Replace the panel
No
Replace the main board
No
Replace the LVDS cable
28
4. No display
No display (No LED)
Check TV is under control and power
on/off by remote control and power key?
Yes
Check the LVDS cable
Yes
Yes
Check the backlight is
“On”?
No
Reinsert or replace the
LVDS cable
No
No
Check the B/L
signal is available?
Yes
Replace the main board
No
Replace main board
Panel Vcc = 12V?
Yes
Replace the Panel
No
Replace the main board
Power board output＝12/16V?
Yes
Replace the Panel
Replace the power board
No
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