AOC LE22H168 Schematic
21.5″ LCD TV AOC LE22H168
Service
Service
Service
31~68 KHz
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….....………………….…..…….......7
2.3 How to Connect……..……………….…….……….....17
2.4 Front Panel Control Knobs…….………….……….....19
3. Input/Output Specification…………....................…....21
4. Mechanical Instructions…………………….................23
5. Repair Flow Chart ……………………….…….…….....27
6. PCB Layout ………………..…………………....….......34
6.1 Main Board……………..……………...…….…….......34
6.2 Power Board……...……………..….…….……….......36
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
6.3 LED Board……...………………..……..……….......39
6.4 Key Board…………….………….……..……….......39
6.5 IR Board………………………….……..……….......39
7. Adjustment..............................................................40
7.1 ADC Adjustment……………………..……...………40
7.2 FW Upgrade.………………………………...………41
8. Block Diagram.…….................................................45
9. Schematic Diagram…..…………....………………...46
9.1 Main Board…………………………………...….......46
9.2 Power Board…………..….….……...………….......58
9.3 LED Board…...………….……….…………….........60
9.4 Key Board……………….……….…………….........61
9.5 IR Board……...………….……….…………….........62
10. Exploded View………………………………….…...63
11. BOM List……………….………………….………….65
Horizontal Frequency
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 TPV Model
A00 Jul.8,2011 Initial release E2ABAZNKAEM49NX
3
1. General Specification
Model LE22H168
Panel size
Resolution
TV System
Channel coverage
Speaker
Antenna impedance
Power source
Standby power consumption
Video/Audio Terminals
Video/Audio Input
Component Input
HDMI Terminals
VGA Terminals
Headphone
SPDIF Output
Size (W x H x D)
(with base and stand) (mm)
Size (W x H x D)
(without base and stand) (mm)
Weight
Wall mount size
Wall-Mount accessory
Equipment:
Operation Temperature
Storage Temperature
Note:
_ 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.
546 mm diagonal (21.5” viewable)
1920 x 1080
NTSC standard
ATSC standard (8-VSB, Clear-QAM)
VHF: 2 through 13
UHF: 14 through 69
Cable TV:
Mild band (A - 8 through A - 1, A through I)
Super band (J through W)
Hyper band (AA through ZZ, AAA, BBB)
Ultra band (65 through 94, 100 through 125)
3 W x 2
75Ω
100-240V, 50/60Hz, 41W
<1W
Side AV x1: Video/Audio Input
VIDEO: 1 V(p-p), 75 ohm, negative sync.
AUDIO: 500mv (rms)
Rear Component x1:
Y: 1V(p-p), 75 ohm, including sync.
Pr/Cr: ±0.35V(p-p), 75 ohm
Pb/Cb: ±0.35V(p-p), 75 ohm
AUDIO: 500mv (rms)
HDMI INPUT: Rear HDMI x1; Side HDMI x1
HDCP compliant
E-EDID compliant
VGA INPUT:
Rear VGA (D-SUB 15 Pin) Input x1
E-EDID compliant
Audio Input: Mini-jack for stereo (3.5Ø)
Audio Output: Mini-jack for stereo (3.5Ø)
Optical Digital Audio Out jack.
525 x 351 x 101.8
525 x 341.13 x 35
4.31 Kg (with stand) / 3.31 Kg (w/o stand)
100 x 100 mm (Wall mount kit is not included)
Optional accessory and not included in standard package
35 ºC for moderate climates (Maximum ambient temperature)
-20 ºC~50 ºC
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2. Operating Instructions
2.1 The Use of Remote Control
5
* Multichannel Television Sound (MTS)
The broadcasting standard, which allows stereo sounds to be transmitted with the TV picture.
** Second audio program (SAP)
Another or additional audio channel provided for in the Multichannel Television Sound (MTS) broadcast standard. A
monaural sound track included within the recorded or video signal (usually containing a second language translation
for the displayed program).
*** Sleep
You can set a time period for which the TV will be turned off automatically.
6
2.2 To Use the Menus
7
8 9
10 11 12 13 14 15 16
2.3 How to Connect
17
18
2.4 Front Panel Control Knobs
19
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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 No Pin
2 Green Video 10 Sync Ground
3 Blue Video 11 SDA(Remote Control)
4 SCL(Remote Control) 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
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3.3 Compatible Mode Table
Analog RGB Input Signal
Horizontal Vertical
Resolution
640x480@60Hz 31.469 - 59.940 - 25.175
720x400@70Hz 31.469 - 70.087 + 28.322
800x600@60Hz 37.879 + 60.317 + 40.000
1024x768@60Hz 48.363 - 60.004 - 65.000
1280x720@60Hz 44.772 - 59.855 + 74.500
1280x768@60Hz 47.396 - 59.995 + 68.250
1280x1024@60Hz 63.981 + 60.020 + 108.000
1440x900@60Hz 55.469 + 59.901 - 88.750
1680x1050@60Hz 65.290 - 59.954 + 146.250
1920x1080@60Hz 67.500 + 60.000 + 148.500
Nominal
Frequency(KHz)
Sync
Polarity
Nominal
Freq. (Hz)
Sync
Polarity
Nominal Pixel
Clock (MHz)
HDMI Input Signal
Horizontal Vertical
Nominal
Mode Resolution Total
VGA 640x480@60Hz 800x525 31.469 N 59.940 N 25.175
DOS 720x400@70Hz 900x449 31.469 N 70.087 P 28.322
SVGA 800x600@60Hz 1056x628 37.879 P 60.317 P 40.000
XGA 1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
WXGA 1280x768@60Hz 1312x800 47.396 P 59.995 N 68.250
CVT-0.92M 1280x720@60Hz 1664x748 44.772 N 59.855 P 74.500
SXGA 1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000
WXGA+ 1440x900@60Hz 1600x926 55.469 P 59.901 N 88.750
WSXGA+ 1680x1050@60Hz 2240x1089 65.290 N 59.954 P 146.250
FHD 1920x1080@60Hz 2200x1125 67.500 P 60.000 P 148.500
480i 720x480i 15.75 60 13.513
480P 720x480P 31.50 60 27.027
720P 1280x720P 45.00 60 74.25
1080i 1920x1080i 33.75 60 74.25
1080P 1920x1080P 67.5 60 148.5
1080P 1920x1080P 27 24 74.25
Frequency
(KHz)
Sync
Polarity
Nominal
Freq.
(Hz)
Sync
Polarity
Nominal
Clock
(MHz)
Pixel
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4. Mechanical Instructions
1. Remove the screws to remove STAND and BASE.
2. Remove the screws to remove REAR COVER.
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3. Remove the screws to remove AC COVER and SPEAKERS.
4. Remove the screws to remove BKT.
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