21.5″ LCD TV AOC LE22A3520/61
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…………....................…....23
4. Mechanical Instructions…………………….................24
5. Repair Flow Chart ……………………….…….…….....27
6. PCB Layout ………………..………………....….......34
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
6.1 Main Board…………..……………...…….…….......34
6.2 Power Board……...…………..….…….……….......37
6.3 Key Board…...………………………………….......39
6.4 IR Board…...…………………………………….......39
7. Adjustment..............................................................40
8. Block Diagram.…….................................................41
9. Schematic Diagram…..…………....………………...42
9.1 Main Board…………………………………...….......42
9.2 Power Board…………..….….……...………….......54
9.3 Key Board……………….……….…………….........56
9.4 IR Board…...…………….……….…………….........57
10. Exploded View………………………………….…...58
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
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 Jun.13,2012 Initial release LE22A3520/61 E22B1KNCBQA1NN
3
1. General Specification
Notas:
• 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
Picture Setting
6
Sound Setting
Settings Menu
7
Channel Search
8
Manual search description
1. Select Channel Search menu.
2. Select Manual Search and press OK key or ► arrow key to get Manual search sub-menu
9
Channel Edit Menu
In these case the shortcut key like Red key,Green key,Yellow key,Blue key action as below.
Red key:To set the channel as user’s favoriate channel.
Green key:To skip the channel and you will not find this channel by press ch+/- key to change channel.
Yellow key:To lock the channel and user will get the channel only by entering the password.
Blue key:To delete the channel and user will get the channel only by re-searching the channel.
10
Other Adjustments
11
* Passwors Setting, TV Lock, Blue Screen functions are available only in TV mode.
* Noise Reduction, DCR, DCC will be enable only when the Picture mode is Personal.
* Press Red key on remote control to reset Blue screen, Sleep time, Zoom, Noise Reduction, DCR,DCC,HDMI/DVI
Switch, Color System functions to the default settings.
12
Sound and OSD
13
PC setting
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.
* This setting is only available in VGA source
14
Media Functions(USB)
Viewing Photos
15
USB menu settings for Photo Slide show
Press OK key to get following Menu setup shown above.
1. [Transition Effect] : Select the slide transition as None, Top To Bottom, Bottom To Top, Left To Right, Right To
Left, Random.
2. [Rotate] : Rotate the select photo by 90° clock wise direction.
3. [Play Time] : Select the duration of time a photo is to be displayed.
4. [Information] : Display the information of the file.
Playing Music files
Press OK key to get following Menu setup shown above.
1. [Repeat Mode] : Select the repeat mode as None, Single,Random,All.
2. [Sound Mode] : Select sound mode like Pop,Rock,Classical,Dance,Music,Personal.
3. [DSS Effect] : Turn on or off TV DSS effect.
4. [Background Music] : Select it to on to turn off dispaly and to get only sound from TV
5. [Information] : Display the information of the file.
Playing Video files
Press OK key to get following Menu setup shown above.
1. [Repeat mode] : Select the repeat mode as None, Single,All,Random.
2. [Information] : Display the information of the file.
16
Reading Text files
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. The system can not support dynamic Gif format.
17
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
18
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.
Connecting USB drive
Connecting Earphone
19
2.4 Front Panel Control Knobs
20
r
r
Item
Description
AV(Audio/Video
) Input
Video Output
Connect audio (L/R)/video output from an external device to these jacks
For connecting the Composite Video signal of the TV to other display devices as their source
signal.
Connect a HDMI signal to HDMI port. The HDMI (High definition Multimedia Input) connecto
provides Non- compressed and fully digital audio/video data transmission between TV set and any
HDMI Input
HDMI audio/video devices, including the set top box, DVD player, Blue-ray player, A/V receive
and computer.
You need an HDMI connection for viewing in 480i, 480p, 576i, 576p 720p, 1080i and 1080p
modes.
PC VGA
IN(RGB)&PC
Audio IN
Component
input
Antenna/Cable
input
It is used to Connect the video output port of a personal computer with a 15 pin D-sub (Analog
RGB) VGA cable. It can be connected to other simulated RGB devices.
Connect separate audio cable between PC and TV to get sound.
Please refer to “Reference Table for computer input signal” for signals that can be displayed.
Connect a component video (YPbPr) / audio (L/R) device to these jacks. Component provides
better picture quality than the composite video connections.
The RF input is for connecting to the cable or VHF/UHF antenna.
USB Connect USB storage device to enjoy Photos, Music and Videos.
21
3. Input / Output Specification
3.1 RGB Signal Input
15 - Pin Color Display Signal Cable
Pin No. Description Pin No. Description
1 Red Video 9 +5V
2 Green Video 10 Sync Ground
3 Blue Video 11 Not Used
4 Not Used 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
3.2 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 NC
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect
22
)
)
3.3 Compatible Mode Table
Analog RGB Input Signal Timing
VESA MODES
Horizontal Vertical
Nominal
Mode Resolution
VGA
SVGA
640x480@60Hz 31.469 N 59.940 N 25.175
800x600@56Hz 35.156 P 56.25 P 36.000
800x600@60Hz 37.879 P 60.317 P 40.000
Frequency
(KHz)
XGA 1024x768@60Hz 48.363 N 60.004 N 65.000
1280x1024@60Hz 63.981 P 60.02 P 108.000
1280x768 @ 60Hz 47.776 N 59.87 P 79.5
1360x768 @ 60Hz 47.712 P 6.015 p 85.8
HDMI Input Signal Timing
Default HDMI Mode
Standard Resolution Horizontal Frequency (kHz
VGA 640 ×480 37.879 60.317
VGA 720 × 400 31.327 69.617
SVGA 800 × 600 37.879 60.317
XGA 1024 × 1768 48.363 60.004
SXGA 1280 × 1024 63.981 60.020
WXGA 1360 × 768* 47.72 59.799
VESA 1280 × 1024 63.981 60.020
VESA 1680 × 1050 64.674
VESA 1920 × 1080 67.5 60.100
Sync
Polarity
Nominal
Freq.
(Hz)
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
Vertical Frequency(Hz
59.884
23
4. Mechanical Instructions
1. Remove the screws to remove BASE.
2. Remove the screws to remove REAR COVER.
24
Loading...