AOC WDEW3223 Service Manual
32″LCD TV WDE W3223
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Service
Service
Service
Horizontal Frequency
31~60 kHz
TABLE OF CONTENTS
Description Page Description Page
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
6. PCB Layout ………………..………………....….......25
6.1.Main Board…………..……………... ....……….......25
6.2.Power Board……………..………....….……….......28
6.3.Key Board……………………….. .... ....……….......29
7. White-Balance, Luminance Adjustment...................30
8. Block Diagram.……............................ ...................32
9. Schematic……………...…………..……....………...33
9.1 Main Board…………………………………...….......33
9.2.Power Board…………….…………...………….......46
9.3.Key Board……………….………. .…....……….......47
10. Exploded View………………………………….…...48
11. BOM List……………….…………………………….49
12.Different Parts List………….……………………..…71
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 Menu…...…………………….……….......6
2.3. How To Connect…….…………………….……….....12
2.4. Front Panel Control Knobs……………….……….....13
3. Input/Output Specification…………....................…....14
4. Mechanical Instructions…………………….................16
5. Repair Flow Chart ……………………….…….…….....20
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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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Revision List
Version Release Date Update Date Revision Instructions TPV Model
A00 May.-25-2008 Nov-19-2008 Initial Release E328MZNKWJWHNC
A01 Nov-19-2008 Nov-19-2008 Add new BOM E32RMZNKWJW2NC
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1. General Specification
Items Specification
Panel Type V315B1-L06 C1 NN
Driving system TFT-LCD CMO Panel
Active Area ratio 16:9
Resolutions 1366 x768
Brightness
400 cd/㎡
Contrast 1500:1
Pixel Pitch 0.51075mm x0.51075mm
Display colors 16.2 million
LCD Panel
Color Temperature Cool / Warm/normal
TV Standard ATSC, NTSC
Color systems ATSC,NTSC
TV Function
Closed Caption / V-chip For USA
AV RCA x 1 Audio L/R x 1
S-Video S-Video x 1 Audio L/R x 1
COMPONENT Y,Cb,Cr x 1 Audio channel L / Rx 1
Video Inputs
HDMI 720p,1080i,480p,480i
Speaker (built-in): Two 11W speakers
Headphone Mini-jack for stereo (3.5ø)
Audio Output Audio Output: L / R
SPDIF
OSD language English, etc
Wall Mount VESA 200 mm x 200 mm
Power Supply AC100V~240V, 50/60Hz
Power
Power Consumption < 180W
Operating 5 °C ~ 40 °C
Storage 0 °C ~ 50 °C
Environment
Operating 10% ~ 85%
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2. Operating Instructions
2.1 The Use of Remote Control
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SETU
P MENU
2.2 To Use the Menus
1 Press the MENU button.
2 Press the ▽or △ button repeatedly to select a menu item.
3 Press the < or > buttons to enter a sub-menu.
4 Press the ENTER or > button to confirm an adjustment or toggle a setting.
5 Press MENU or EXIT to close the on-screen menu.
Press the Menu button to enter the main OSD (On Screen Display). Adjust the items including Setup menu, Video
menu, Audio menu and Feature menu. However, some function items in the menus may only be enabled in the
particular source modes.
The Setup menu in TV mode shows as below. In others source modes, the Setup menu only shows Menu
Language and Aspect Ratio items.
1. Tuning Band: Select TV source signal from the Air (antenna) or Cable (CATV).
2. DTV Signal: 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. Manual Channel Set: Show the channel setup table. User can choose to display the ATSC or NTSC TV channels
and then edit the channel (Viewable or Not Viewable by pressing Enter button). User won’t be able to view the
channel that has been set to Not Viewable when toggling through channels. However, the channels are still
accessible when user enters the channel number.
6. Channel Labels: Show the NTSC / ATSC TV channel label menu for user modifying channel labels specifically.
7. Menu Language: Select the menu display language. (English / Espanol / Francais)
8. Aspect Ratio: Select the display aspect ratio. (Standard/Fill/Overscan)
9. Favorite Channel Mode: When favorite channel mode is on, user can edit favorite channel table in favorite
channel set option.
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V
IDEO MENU
AUDIO 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 modes, the Video menu simply provides Contrast, Brightness, Back
light and Settings (Preset) items.
1. Contrast: Video contrast adjustment, the tuning range is 0 ~ 100.
2. Brightness: Video brightness adjustment, the tuning range is 0 ~ 100.
3. Sharpness: Video sharpness adjustment, the tuning range is -50 ~ 50.
4. Color: Video color chroma adjustment, the tuning range is 0 ~ 100.
5. Tint: Video tint adjustment, the tuning range is R50 ~ G50.
6. Backlight: Backlight strength adjustment, the tuning range is 0 ~ 10.
7. Settings: Restore the default video settings.
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. Audio Language: Change the audio language setting on ATSC TV programs .The number of the supported
audio languages depends on the ATSC TV programs.
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 L31 ~ R31.
5. Digital Audio Output: Digital audio output format selection, user can choose RAW (default) or PCM format or off.
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FEATURE MENU
6. TV Speaker: Choose to turn on / off the TV internal speaker. The digital audio output signals、earphone output
signals will not be turn-off even though the TV speaker is off. The default setting is on.
7. Settings: Restore the default audio settings.
The Feature menu in TV mode shows as below. It provides certain optional control functions such as time set, sleep
timer, advanced video menu, Password Set, parental control (V-chip) and Digital closed caption setting. This menu
gives users the most flexibilities to satisfy their generally demands. According to the various requirements in
different source modes, certain features should be hidden (disable) on the menu. The details footnotes will be
described clearly below.
1. Time Set: Set current time. This sub-menu includes Time Set Mode, Time Zone and Time items. 【Time Set
Mode】user can choose Auto or Manual,【Time Zone】item provides user to set current time zone, such as:
Pacific, Alaska, Hawaii, Eastern, Central and Mountain. 【Time 】item provides user to set the time clock.
2. Sleep Timer: Enable or disable the TV standby timer. User can set the TV standby timer as off / 5 min / 10 min /
15 min/ 30 min / 45 min / 60 min/ 90 min / 120 min / 180min/ 240min. Timer starts to count down after cursor leaving
the sub-menu. (At the moment, the item shows 『** min Left』and the cursor highlights on the Feature icon.)
3. Advanced Video Menu: Provide the Noise Reduction、Color Temperature and 3D Y/C. Dynamic Contrast options
for enhancing video quality.
【Noise Reduction】gives four NR effect degrees, such as: Low, Mid, High and Off. The default setting is Mid.
【Colour Temp】gives three color temperature modes as: Normal、Warm and Cool.
【3D Y/C】provides On / Off switches. The default setting is On.
【 Dynamic Contrast】user can choose 0n or Off.
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【Setting】restores the default advanced video option settings.
4. Password Set: Change the 4-numeral parental control password. Three steps are required for changing the
password: Enter Old Password -> Enter New Password -> Confirm New Password. Note: This item is only available
in TV, Composite and S-Video source modes. The default password is 『0 0 0 0』.
5. Parental Control: provide the parental Control (V-chip) function setting. Before entering the Parental Control
sub-menu, user has to key in the password first. Then enter the Parental Lock item, User can modify the restricted
table about MPAA or TV Rating respectively. While exiting the sub-menu, the parental control function is working.
The inhibitive channels or source signals can be un-lock through pressing the V-CHIP key on the remote control and
then key in the correct password. Note: This feature is only available in TV, Composite and S-Video source modes.
(The default password is: 0 0 0 0.)
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6. Digital Captions: Select the close caption options (Service 1-6, Text 1-4 and CC 1-4) in digital TV mode. When
select service 1 to service 6, you can modulate parameters in the Digital Close Caption.
7. Digital Close Caption: Provide numerous options for setting the digital close caption style. In the sub-menu
【Style】item can be set as Automatic or Custom mode. If Custom mode is selected, user can modify the detail
styles described below. The setting result will be shown immediately on the bottom side of the sub-menu OSD.
Note: This feature is only available in Digital TV (ATSC) mode.
【Size】: Digital close caption font size, which can be set as Small、Normal or Large.
【Font】: Digital close caption font style, which can be chosen as Default or Font 1 ~ 7.
【Text Color】: Giving Red / Green / Blue/ Yellow / Magenta / Cyan / Black / White Colors.
【Text Opacity 】: Giving Transparent / Translucent / Solid / Flashing modes.
【Background Color】: Giving Red / Green / Blue / Yellow / Magenta / Cyan / Black / White Colors.
【Background Opacity 】: Giving Transparent / Translucent / Solid /Flashing modes.
【Edge Effect 】: The text edge effects, which gives None / Raised /Depressed / Uniform / Left Shadow / Right
Shadow modes.
【Edge Color】: The colors of text edge effects, which provides Red /Green / Blue / Yellow / Magenta / Cyan / Black
/ White Colors.
8. Component Set: This option only shows and is available in component mode, which provides fine tuning
component display, such as: 【H-Position】、【V-Position】, 【Clock】and【Phase】(Auto Adjust function is not supported
under Component mode). All these items are giving the tuning range from 0 to 100.【Setting】item provides the
default component setting values restoring.
9. VGA Set: This option only shows and is available in VGA mode, which provides several items for the VGA display
fine tuning, such as : 【H Position】、【V-Position】、【Clock】, 【Phase】, and【Auto Adjust】.All these items giving
the tuning range from 0 to 100. 【Setting】item provides the default VGA setting values restoring.
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2.3 How to Connect
Once your equipment is connected, use the following procedure to view the input signal:
Press the Source button or direct input buttons on the remote controller to select the relevant source to view. (Ex:
Press Video button to select “Composite” if you have connected a video recorder to Composite socket.)
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2.4 Front Panel Control Knobs
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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 Mandatory +5V Supply for PC Bypass
2 Green Video 10 Sync Ground
3 Blue Video 11 SDA(Remote Control)
4 SCL(Remote Control) 12 Bi-directional Data (SDA) for PC Bypass
5 Ground 13 H-Sync.
6 Red Video Ground 14 V-Sync.
7 Green Video Ground 15 Data Clock (SCL) for PC Bypass
8 Blue Video 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 Clock-
13 CEC 14 NC
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect
1
6
11 15
5
10
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3.3 AV/S-Video/Component Video Inputs
3.4 Compatible Mode Table
VESA MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
(KHz)
Sync
Polarity
Nominal
Freq.
(Hz)
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500
640x480@75Hz 840 x 500 37.5 N 75 N 31.500
VGA
720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322
800x600@56Hz 1024 x 625 35.156 P 56.25 P 36.000
800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000
800x600@72Hz 1040 x 666 48.097 P 72.188 P 40.000
SVGA
800x600@75Hz 1056 x 625 46.875 P 75 P 49.5
1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000
XGA
1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750
WXGA 1360x768@60Hz 1792X795 47,712 P 60.015 P 85.5
AV (Composite Video input)
Video1
System NTSC
Amplitude 1.0 V (p-p), negative sync.
Impedance 75 ohm terminated
S-Video (Y / C input)
S-Video2
System NTSC
Y signal amplitude 1.0Vpp (including sync)
C signal amplitude 0.286Vpp
Impedance 75 ohm terminated
Component (Y, Pb/Cb, Pr/Cr input)
Video3
System 1080i, 480p, 720p, 480i
Y signal amplitude 1.0Vpp (including sync)
Cr, (R-Y) / Cb, (B-Y)
Signal amplitude
±0.35Vpp, 75 ohm
Impedance 75 ohm terminated
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4. Mechanical Instructions
1. Remove the 3 screws to remove the base.
2. Remove 11 screws to remove the rear cover.
3. Remove 4 screws to remove the main frame.
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4. Release the connectors.
5. Remove the speakers.
6. Remove the main board, power board
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7. Remove the bkt-PCB-hplder.
8. Release the key board and IR board.
9. Remove the bkt-panel-support.
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10. Remove the bezel.
11. Remove the 4 screws to release the panel.
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5. Repair Flow Chart
1. No Power (No LED indicator)
2. Can not start (LED indicator yellow)
NG
Check power cord and board interface
Plug in power cord and interface
OK
Check F901, BD901, C907
NG
Replace F901 or BD901 or C907
OK
Check IC931, Q931
Check D935, C926, C928
NG
Replace IC931 or Q931
OK
Check T931
OK
Replace T931
Replace D935 or C926 or C928
NG
NG
NG
Repair the key board
OK
Check 5V SB
NG
Return to “1”
OK
Check PWR ON signal
NG
Check U409, Q706, 0704
NG
Replace U409 or Q706 or
Q704
Check I2C communication
OK
Check U401, U402
NG
Replace the main board
OK
OK
Check main board power supply part
Check key board
Check I2C communication
OK
Check 3.3V SB
NG
Check U706
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3. No display (LED indicator green)
Check the source
OK
Reset source
Check LVDS cable
NG
Reset LVDS cable
OK
Check Q932, IC901, Q901
NG
Replace Q932 or IC901 or Q901
OK
OK
Check U401
NG
Replace main board
OK
Check panel
NG
Replace panel
Check IC951, Q951, Q952
NG
Replace IC951 or Q951 or Q952
OK
Check T951
NG
Replace T951
OK
Check D955, D956
NG
Replace D955, D956
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4. Abnormal display
Check the source
OK
Reset source
NG
Check signal filter circuit
NG
Replace the filter or inductance
OK
NG
TV signal Check TV system setup
OK
Check TU202
Replace TU202
HDMI signal
Check U502
NG
Replace U502
OK
Check U406
NG
Replace U406
OK
Check U401
NG
Replace main board
OK
Check panel
NG
Replace panel
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