AOC L37W861 User manual

37”LCDTV AOCL37W861
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Service
Service
Service
Horizontal Frequency
31~60kHz
TABLE OF CONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSONATTEMPTING 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
6.1.Main Board…………..…………...……….......23
6.2.Power Board……………..………….………...25
6.3.Key Board………………………..……….......26
6.4.IR Board…………………………..……….......26
7. White-Balance, Luminance Adjustment............27
8. Block Diagram.……..........................................29
9. Schematic……………...…………..…………...30
9.1.Main Board……………………………...….......30
9.2.Power Board…………………...………….......45
9.3.Key Board……………….….………….......46
10. Exploded View…………………………….…...47
11. BOM List……………….……………………….48
12. Different Parts List…………………………….70
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……………….……….....12
3. Input/Output Specification…………....................…....13
4. Mechanical Instructions…………………….................15
5. Repair Flow Chart ……………………….…….…….....18
6. PCB Layout ………………..………………....….......23

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Revision List
Version Release Date Revision Instructions TPV Model
A00 Aug.-13-2008 Initial Release E378AZNKW8AENN
A01 Aug.-14-2008 Add New BOM E378AZNSW8A1NN
A02 Nov.-28-2008 Add New BOM E37RAZNKW8A52N

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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 openAVOID 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, WHICHARE 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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1. General Specification
Items Specification
Panel Type T370XW02 VC00 SZAUO
Driving system TFT-LCD AUO Panel
Active Area 16:9
Resolutions 1360 x768
Brightness 450 cd/΃
Contrast 2500:1
Pixel Pitch 0.6mm x0.6mm
Display colors 16.7 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 2 Audio L/R x 2
S-Video S-Video x 2 Audio L/R x 2
COMPONENT Y,Cb,Cr x 2 Audio channel L / Rx 2
Video Inputs
HDMI x3 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 < 200W
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
PREV CH
Press to display the previous TV .
MTS/SAP
Press to activate the NTSC TV
sounds, such as: Stereo, SAP or
Mono tone. And languages of DTV.
WIDE
Press to choose the display aspect
as: Normal, Wide, Zoom or Cinema
mode.
SOURCE
Press repeatedly to choose the
various input sources (Video 1 ~ 6).
EPG
This function is not support.
MUTE
Press to set TV sound mute ON/OFF
DISPLAY
Press to show the information about
the input sourceǃTV channelǃdisplay
resolution and current time.
VOL- / VOL+
Press + or - to adjust the volume.
Exit
Press to exit menu or OSD.
V-CHIP
Press to lock / unlock Parental
Control temporarily. (After setting the
restricted table of MPAA or TV
Rating.)
VIDEO ADJ
Press to choose the Brightness or
Contrast adjustment.
AUDIO ADJ
Press to switch the ATSC
multi-channel TV sounds.
CC
Press repeatedly to change the
closed caption type as CC ON/CC
OFF/CC ON WHEN MUTE.
FAVORITE
Press to toggle the Favorite/Normal
mode.
POWER
Press to power ON/OFF (standby)
TV. (Note:1.TV is never completely
power off.
unless physically unplugged.
2.Press to turn on TV after the power
on status LED had changed to the
red color and stopped flashing. )
VIDEO
Press repeatedly to choose S-Video/
Composite source mode (Video 1 ~ 2).
COMP
Press repeatedly to choose
Component
source mode (Video 3 ).
PC/HDMI
Press repeatedly to choose VGA or
HDMI source mode (Video 4 ~ 6).
TV
Press to choose ATSC/NTSC TV
source mode.
0 ~ 9 /- number
Press to enter TV channel number to
select channel (Press ‘-’ to indicate
choosing the sub-channel).
SLEEP
Press to set a time period
(off/30min/60min/90min) after which
the TV should switch itself to standby
mode.
FREEZE
Press to freeze the displayed picture
VOL- / VOL+
Press + or - to adjust the volume.
MENU
Press to open or exit menu.
“
ġ
”,“
୹
”,“
˘
”,“
˚
”, “ENTER”
Press to adjust the various function
items on the menu.

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MAIN MENU
2.2 To Use the Menus
1 Press the MENU button.
2 Press the or button repeatedly to select a menu item.Ƹ
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.
On-screen menus
On-screen menu Options
Setup
Tuning Band–Selects the TV antenna source (Air or Cable).
DTV Signal–Displays the digital TV signal strength. For more information.
Auto Ch Search–Automatically sets up a list of the channels available in your
area.
Add On Ch Search–Lets you add new channels without going through the
entire list of available channels.
Manual Ch Set–Lets you add or delete channels from the channel list.
Channel Labels–Lets you add a label to a channel. For more information.
Menu Language–Selects the language for the on-screen menu. You can
select English, French, or Spanish.
Aspect Ratio–Selects the screen aspect ratio:
Normal, Wide1, Wide2, Zoom, or Cinema. You can also press ZOOM to
select the aspect ratio.
Favorite Channel mode–Lets you edit your favorite channel list. Press
FAVORITE on the remote to toggle this mode on or off.
Video
(Options may vary in different
modes.)
Contrast–Increases the picture level to adjust the white areas of the picture.
Decreases the picture level to adjust the black areas of the picture. (0 ~ 100)
Brightness–Increases the brightness to add more light to dark areas of the
picture. Decreases the brightness to add more dark to light areas of the
picture. (0 ~ 100)
Sharpness–Increases the sharpness for a cleaner and clearer image.
Decreases the sharpness for a smoother picture. (-50 ~ 50)

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Color–Adjusts the overall color of the picture. (0 ~ 100)
Tint–Increases the color level to add more green to skin tones. Decreases the
color level to add more purple to skin tones. (R50 ~ G50)
Backlight–Adjusts the backlight level (0 ~ 10).
Settings–Restores the video settings to factory default.
Audio
(Options may vary in different
modes.)
Audio Language–Selects an alternate language if the program has more
than one language available. Only available in ATSC TV mode.
Bass–Adjusts the low sounds (bass).
Treble–Adjusts the high sounds (treble).
Balance–Adjusts the right and left speaker volumes.
Digital Audio Output–Selects the audio mode for the digital audio optical
jack.
• RAW: AC-3 in - AC-3 out/PCM in – PCM out.
• PCM: AC-3 in - PCM out/PCM in – PCM out.
TV Speaker–Turns the internal TV speaker On (default) or Off. Does not
affect the digital audio output, the headphone output, and the composite audio
output.
Settings–Restores the audio settings to factory default.
Feature
Time Set–Sets the clock. For more information
Sleep Timer–Sets the sleep timer.
Advanced Video Set–
• Noise Reduction–Select from Low, Mid, High, and Off.
• Color Temperature–Select from Normal, Warm, and Cool (default).
• 3D Y/C–Choose from On (default) or Off.
• Dynamic Contrast–Choose from On or Off (default).
• Setting–Restores the settings to factory default.
Password Set–Lets you set the password for parental control options. The
default password is 0000.
Parental Control–Accesses V-chip controls.
Digital Caption–Sets the digital caption type. Digital Close
Caption:–Customizes closed captions for digital broadcasting systems. You
can adjust Size, Font, Text Color, Text Opacity,
Background Color, Background Opacity, Edge Effect, and Edge Color.
Component Set–Only available in component mode. Lets you set Horizontal
Position (1 ~ 100), Vertical Position (1 ~ 100), and Phase (1 ~ 100). The
Settings option restores the settings to factory default.
Audio only: press this item for those TV programs with audio only and
without the display. When the audio only is on, you could still modify the
volume.
VGA Set–Only available in VGA mode. Lets you set Horizontal Position (1 ~
100), Vertical Position (1 ~ 100), Clock (1 ~ 100), and Phase (1 ~ 100). You
can also select Auto Adjust to automatically adjust the settings. The Settings
option restores the settings to factory default.

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USING YOUR TV
To turn your TV on and off:
1 Make sure that the power cord is connected to your TV and a power outlet.
2 Press the POWER button to turn on your TV. The power indicator LED turns blue.
3 Press the POWER button again to return your TV to standby. The power indicator LED turns red.
To select the TV signal source:
• With the TV on, press the INPUT button on either the TV or the remote to choose from:
• TV
• Composite
• S-Video
• Component
• VGA
• HDMI
Setting up the channel list:
After you select your TV source, if you selected antenna or cable you need to set up the channel list. When you set
up your channel list, your TV searches for all available channels in your area and store a list of these channels.
When you press the CH
˺
or CH v buttons, your TV skips the channels that do not have a signal.
To automatically set up the channel list:
1 Press the MENU button. The Main on-screen display menu opens with Setup highlighted.
2 Press the > button to enter the sub-menu, then orbutton to highlightƸAuto Ch Search.
3 Press ENTER or >to start the search.
Manually adding or deleting channels from the channel list
After you create a channel list using the Auto Ch Search option, you can manually add or delete channels from the
channel list.
To add or delete channels:
1 Press the MENU button. The Main OSD (On-Screen Display) menu opens with Setup highlighted.
2 Press the > button to enter the sub-menu, then or to highlightƸ Manual Channel Set. The Channel Setup
Table opens.
3 Press the or button to select a channel, then press then pressƸ ENTER to toggle between viewable and not
viewable.
4 Press MENU or EXIT to close the menu.
To change channels:
• Press the CH v or CH ^ button on the remote control to go to the next lower or higher channel. Or Press the
number buttons to directly select a channel (for example, if you want channel 83, press 8, then press 3).Or Press the
RECALL button to go to the last viewed channel.
Selecting a digital sub-channel
Most digital TV channels have more than one channel. The main channel carries the signal for the main TV program.
The sub-channels carry signals for additional or alternate programming, such as a radio or news broadcast.

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For example, if the main channel number is 8, the sub-channel number might be 8-1, 8-2, or 8-3.
To select a sub-channel:
1 Press the number buttons for the main channel (for example 8).
2 Press the – button, and then press the sub-channel button (for example 1).
To adjust the volume:
• Press the VOL – or VOL + button to decrease or increase the volume.
• Press the MUTE button to turn off the sound. Press the MUTE button again to turn the sound back on.
To display status information:
• Press the DISPLAY button. Your TV displays status information, such as the channel number or signal source.
To check the DTV signal strength:
1 Press the MENU button. The Main OSD (On-Screen Display) menu opens with Setup highlighted.
2 Press the > button to enter the sub-menu, then or to highlightƸ DTV Signal. The DTV Signal meter opens.
3 Press MENU or EXIT to close the menu.
To add a label to a channel:
1 Press the MENU button. The Main OSD (On-Screen Display) menu opens with Setup highlighted.
2 Press the > button to enter the sub-menu, then or to highlightƸ Channel Labels. The Channel Label menu
opens.
3 Press the < or > button to move the cursor to the channel field or label field, and then press the or button toƸ
select
4 Press < or > to move the cursor to the label field, then press or to select the character.Ƹ
5 Press the ENTER key to return to the previous menu.
Freezing the picture
You can freeze (still) the screen image.
To freeze or unfreeze the picture:
• Press the FREEZE button.
To set the clock:
1 Press the MENU button. The Main OSD (On-Screen Display) menu opens with Setup highlighted.
2 Press the or button repeatedly to highlightƸ Feature. The Feature menu opens.

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3 Press the > button to enter the sub-menu, then or to highlightƸ Time Set. The Time Set menu opens.
4 Press the or button move to the different fields, then press < or >to cƸ hange the settings.
5 Press MENU or EXIT button to close the menu.
To set the sleep timer:
1 Press the MENU button. The Main OSD (On-Screen Display) menu opens with Setup highlighted.
2 Press the or button repeatedly to highlightƸ Feature. The Feature menu opens.
3 Press the > button to enter the sub-menu, then or to highlightƸ Sleep Timer.
4 Press < or > to select the amount of time (Off, 5 min, 10 min, 15 min, 30 min, 45 min,60 min, 90 min, 120 min,
180 min, 240 min). To turn off the timer, select off.
To view closed captions:
• Press the CCD button repeatedly to select a closed caption option. You can select:
• On
• Off
• On When Mute

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2.3 How to Connect
HDMI S-Video Composite Pr Pb Y PC Audio in /15-pin D-Sub
1. HDMI – Connect the primary source for digital video such as a DVD multimedia player or set top box through
this all digital connector. The white color band on the rear of the TV indicates this connection.
2. RGB PC – Connect the video and audio cables from a computer here.
3. AV/S-VIDEO IN – Connect the primary source for composite video devices, such as a VCR or video game.
Use the white and red connectors to connect the external audio from the same source. The signal being
carried by the S-Video cable and connector, if connected, will take priority over the Video RCAconnector (yellow
connector).
4. COMPONENT (YPb/CbPr/Cr with Audio L/R) – Connect the primary source for component video devices such
as a DVD Player or set top box here. From left to right, use red for Pr, blue for Pb, green for Y, red for right
audio (R) and white for left audio (L) inputs.
5. DTV – Connect to an antenna or digital cable (out-of-the-wall, not from Cable Box) for Digital TV.*
6. SPDIF (Optical Digital Audio Out) - When a digital audio signal is associated with the input selected for
viewing, the digital audio will be available on this SPDIF connection to your home theater system.
Once your equipment is connected, use the following procedure to view the input signal:
Press the source button on the remote controller to select the relevant source to view. (Ex: Press VIDEO
button to select “Composite Rear” if you have connected a video recorder to Composite Rear socket.)

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2.4 Front Panel Control Knobs
1 VOL + VOL +: Press to increase the sound volume level.
2 VOL - VOL - : Press to decrease the sound volume level.
3 CH ŸCH +: Press to select the next higher Program number.
4 CH źCH - : Press to select the next lower Program number.
5 MENU Menu key: Press to open or exit the OSD menu.
6 INPUT Source key: Press to select the input source.
7 POWER Power key: Press to turn on / off (standby) the TV set.
(Please re-turn on TV after the Power-ON status LED had changed to
the Red color and finished flashing.)

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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
Polarit
y
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
VGA
640x480@75Hz 840 x 500 37.5 N 75 N 31.500
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 46.0875 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 4 screws to remove the stand.
2. Remove the screws to remove the rear cover.
3. Remove the main board, power board

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4. Remove the BKT-PCB-holder.
5. Release the speakers.
6. Release key board and IR board.
7. Remove the screws to remove the panel bkt.

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8. Remove the 5 screws to release the panel and bezel.

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5. Repair Flow Chart
5.1. No Power (No LED indicator)
5.2. Can not start (LED indicator yellow)
NG Re
p
air the ke
y
board
OK
Check 5V SB NG Return to “1”
OK
Check PWR ON si
g
nal NG Check U411
,
X402 NG Replace U411 or X402
Check I
2
C communication
OK
Check U401
,
U402 NG Re
p
lace the main board
OK
OK
Check main board
p
ower su
pp
l
y
p
art
Check ke
y
board
Check I
2
C communication
OK
Check 3.3V SB NG Check U703
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 T901
OK
Replace T901
Replace D935 or C926 or C928
NG
NG

37ƎLCDTV AOCL37W861
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5.3. 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

37”LCDTV AOCL37W861
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5.4. 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 TU201 Replace TU201
HDMI signal Check U501, U502,
U503, U504
NG ReplaceU501, U502,
U503, U504
OK
Check U406 NG Replace U406
OK
Check U401 NG Replace main board
OK
Check panel NG Replace panel