AOC TV3766W User manual

37’’ LCD TV AOC TV3766W
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Service
Service
Service
Horizontal Frequency
31.5-48.36KHz
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
7. PCB Layout …………..……………….....….......30
7.1. Main Board…………..………….………........30
7.2. Power Board…………..………….……….......33
7.3. Audio Board………………………………….....36
7.4.Tuner Board………………………..……….......37
7.5.Key Board…………………….…………........38
7.6.IR Board…………...……………….……….......38
8 Block Diagram…………………………………..39
9. Schematic……………………………………...40
9.1 Main Board………………………………........40
9.2. Power Board…………….……….…….……...51
9.3. Tuner Board……………………….……........52
9.4. Audio Board…………………………….......56
10. Exploded View..……………............................57
11. BOM List……………….…………….………….59
Table Of Contents.......…….............................…........1
Revision List……………………………………………....2
Important Safety Notice.......................................……......3
1. General Specification..............................………........4
2. Operating Instructions…………………….……….......5
2.1. The Use Of Remote Control…….………….…….......5
2.2. Front Panel Control Knobs……………….………....6
2.3. To Use The Menu…...…………………….……….......7
2.4. How To Connect…….…………………….……….....13
3. Input/Output Specification…………....................…....16
3.1.Input Signal Connector…………....……………….....16
3.2.Factory Preset Display Modes……………………….17
4. White-Balance, Luminance Adjustment......................18
5. Mechanical Instructions…………………….................22
6. Repair Flow Chart ……………………….…….…….....25

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Revision List
Version Release Date Revision History TPV Model
A00 Apr.-06-2006 Initial Release E376ATNCD1MRNP

37’’ LCD TV AOC TV3766W
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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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1. General Specification
Items Specification
Panel Type 37” CMO T370XW01 V1
panel
Driver Element A-SI TFT active matrix
Aspect Ratio 16: 9
Resolution (Native) 1366 x 768 WXGA
Pixel Number 0.6 (H) x 0.6 (V) mm
Active Display Area H x V 819.6 (H) x 460.8 (V) mm
Pixel Pitch 0. 4365mm(H) x 0.4365mm(V)
Contrast Ratio 700:1 (type)
Brightness 450 nits (Typical)
Response Time 8ms
View Angle (CR≥10) H: 170/V: 170 (CR>10)
Display colors 16.7M colors (8-bits colors)
Lamp Type/Life 60000 hr (at 4.5mA)
LCD Panel
Color Temperature Cool / Warm
Frequency Range Horizontal: 31.5-48.36 KHz, Vertical: 60-75 Hz
TV System PAL B/G,D/K,I, NTSC M
Audio Output Audio Output: L / R Headphone Mini-jack for stereo (3.5ø)
OSD language
(default) English, Simplified Chinese
Table Stand Included
Wall Mount VESA 100 x 100 mm
Power Supply AC100V~240V, 47-60 Hz ±3Hz
Power
Power Consumption
Normal: <220 W
Standby: < 7W
Suspend: < 7W
Power Off < 5W
Operating Tem. + 0 °C ~ + 40 °C
Storage Tem. -25°C to 60°C
Operating humidity 10% ~ 85%
Environment
Storage humidity 5% ~ 85%

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2. Operations Instructions
2.1 The Use Of Remote Control
POWER
Press to turn on/off the TV.
Video/S-Video
Select your input source to
VIDEO or S-VIDEO.
COMP/T-LINE
Select your input source to
Component or HDMI(T-LINE).
VGA
Select your input source to
VGA.
(This type couldn’t support
DVI function.)
TV
Select your input source to
TV.
0~9/100 Digit buttons
To select a TV channel.
SLEEP
With this key you can set a
time period after which the TV
should switch itself to
standby. Press the key
repeatedly to select the
number of minutes. The
counter runs from
15,30,45,60,90,120 minutes.
PIP
Press to Open or Close
PIP&PAP.
VOL
Press + or - to adjust the
volume.
CH
Press + or - to change TV
channels number.
MENU
Press to open or exit main
menu
NICAM
When NICAM menu
activated,press the key
repeatedly to select
MONO/DUAL1/DUAL2
/DUAL 1+2/STEREO.
DISPLAY
(1) Display Channel number
when use RF input.
(2) Display input source
when use other input
except TV RF input.
MUTE
Temporarily interrupt the
sound or restore it.
PRE-CH
To display the previously
selected TV channel.
WIDE
Includes 6 modes: Press
repeatedly to select
4:3 /14:9 / 16:9 ZOOM
16:9 ZOOM UP /
CINERAMA/ALL
SCREEN.
EFFECT
You can choice your prefer
mode of
NEWS/MOVIE/MUSIC/
BBE ViVA/CUSTOM/
STEREO.
SWAP
Press this key can select PIP
main source and sub source
exchange.
SOURCE
Press this button to display
selected source, press
∧∨button to select.
∧∨ button
When in menu mode, use this
button to select to the
up/down; otherwise, to
change TV channels.
OK
Press the button to
confirm selection.
< > button
use this button to
confirm selection or
adjust the desired
parameter;
otherwise, to
increase/decrease
the volume.

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2.2 Front Panel Control Knobs
:Press this button to turn on the TV or allow the TV to enter standby mode. It is located on the lower right
corner of the TV.
If the TV is in standby mode, the indicator at the front will illuminate amber.
MENU : Press this button to display or exit the OSD menu.. .
CH(▲) : When the OSD menu appears, press these two buttons to elect the item you want to execute; when no
OSD menu appears, use to change channels in TV mode.
VOL.(+-) : When the OSD menu appears, press these two buttons to confirm the selected item; when no OSD
menu appears, use to adjust the volume.
SOURCE : Press this button to display selected source, press ▲button to select.

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2.3 OSD Operations
To use the menus
1. Press the Menu button to display or exit the Main Menu.
2. Use the Up or Down buttons to select the function to be adjusted. The function where the cursor is located is the
selected one.
3. Use the Left or Right buttons to enter into the submenu, or to enable or adjust the selected function. The
function where the cursor is located is the one that can be adjusted.
4. Press the Menu button to exit the menu.
Adjust menu screen in TV/AV mode
(Note: In different modes, the functions that can be adjusted are different. A grey menu indicates that the
function cannot be adjusted.)
Press the MENU button to enter into the OSD MAIN MENU. Items adjustable include : VIDEO SETTING, SOUND SETTING, PIP
SETTING, OPTIONS SETTING, CHANNEL SETTING
VIDEO SETTING:
1. PICTURE: User can select PERSONAL、VIVID、STANDARD、MILD, if selected except PERSONAL item,
Contrast、brightness、Saturation、Sharpness、NR、Backlight can’t adjust .
2.CONTRAST: Adjust black and white level ,suitable contrast can make picture more lightly . adjustment range is
from 0 to 100.
3.BRIGHTNESS : Adjust background brightness , user can collocation it with contrast adjustment range is from 0 to
100.
4.SATURATION: Adjust color saturation , range is from 0 to 100.
5. SHARPNESS: adjustment picture sharpness , range is from 0 to 100 .
6.TINT: When the TV uses the NTSC system, you can adjust to the TINT you prefer. The adjustment range is from
-50 to +50
7.NR: : When the signal is poor, you can turn on the noise reduction function.
8.BACKLIGHT: The adjustment range of Black Level is from 0 to 10.

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You can adjust contrast、brightness、Saturation、Sharpness to your prefer level .
SOUND SETTING
1.VOLUME : The Volume adjustment range is from 0 to 100
You can adjust the Volume of the picture to the level you prefer.
2.EFFECT：You can choice your prefer mode of CUSTOM、STEREO、NEWS、MOVIE、MUSIC、BBE ViVA; Default
is CUSTOM mode.
3.120Hz、500Hz、1500Hz、5KHz；10KHZ: Choice the prefer frequency to increase or decrease
PIP SETTING
1. DUAL MODE : Can select OFF、PIP、PAP status .
2. POSITION: change small picture position.
3. SOURCE: choose video source from TV/AV1/AV2/S-video.
4. SOUND SELECT: choose sound source from MAIN/SUB.
OPTIONS SETTING:
1.MENU LANGUAGE: This indicates the different languages available for the OSD menu, including Simplified

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Chinese, English and traditional Chinese. The default is Traditional Chinese .
2.MENU TIMEOUT: OSD stay timer .
3.MENU BACKGROUND: User can select Opaque or transparency with Menu background.
4.SLEEP TIMER: Use this button to set a time period after which the TV will enter into stand by mode. The time
period can be 0>15>30>45 > 60 > 90 > 120 minutes.
The timer will begin to count down from the selected number of minutes after the OSD menu disappears.
Note: To check the remaining time, press the SLEEP button. To cancel the sleep timing, press the SLEEP button
repeatedly until 0 appears. If you turn off the TV after you set the sleep timing, the setting will be cleared. You will
need to set it again.
5. BLUE SCREEN : When there is no signal input in TV, AV, S-Video and HDTV modes, the screen will become blue.
If set to On, the screen will become blue. If set to Off, the screen will display a snowy picture when in TV signal
mode and become black in other signal modes. The default is On.
5. RESET : Used to resume the TV’s default settings.
CHANNEL SETTING
1. COLOR SYSTEM: Auto select TV broadcast system , AUTO/NTSC/PAL.
Note: when user finish auto search , user can change system .
2. SOUND SYSTEM: Select the sound system for a TV broadcast system.BG system shall be selected for most
areas of Indonesia.
3. AUTO SEARCH: Used to scan all the TV channels and save to memory.
The TV’s total number of channels is 125 (1-125). If you use the remote control to select a number out of the range
of 1-125, it will automatically skip to the channel number you previously watched.
4. MANUAL SEARCH: Used to scan the TV channels one at a time. When you scan a channel and press MENU,
the last channel will be automatically saved.
5.FINE TUNE: Fine-tunes the frequency of a channel to obtain better image quality.
6. CHANNEL SWAP : Swap current channel with others.
7. CHANNEL SKIP : If set to “On”, this channel will be shielded. When you press the Channel Up/Down buttons,
you cannot enter this channel. But when you press the digit buttons, you can enter it. To regain full access this
channel, set this item to Off.

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Adjust menu screen in VGA mode:
The TV has a VGA analog interface, which can be switched using the VGA button on the remote control.
Press the MENU button to enter into the OSD Main Menu. Adjustable items include: VIDEO SETTING 、SOUND
SETTING 、OPTIONS SETTING、VGA SETTING .
VIDEO SETTING
1. PICTURE: Can’t adjust in VGA mode .
2.CONTRAST: Adjust black and white level ,suitable contrast can make picture more lightly. adjustment range is
from 0 to 100.
3.BRIGHTNESS : Adjust background brightness, user can collocation it with contrast adjustment range is from 0
to 100.
4.SATURATION: Can’t adjust in VGA mode.
5. SHARPNESS : Can’t adjust in VGA mode.
6.TINT: Can’t adjust in VGA mode.
7.NR: Can’t adjust in VGA mode.
8.BACKLIGHT: Can’t adjust in VGA mode.

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OPTIONS SETTING:
1.MENU LANGUAGE: This indicates the different languages available for the OSD menu, including Simplified
Chinese, English and traditional Chinese. The default is English.
2.MENU TIMEOUT:OSD stay timer.
3.MENU BACKGROUND: User can select Opaque or transparency with Menu background.
4.SLEEP TIMER: Can’t adjust in VGA mode.
5. BLUE SCREEN : Can’t adjust in VGA mode.
6.RESET : Used to resume the TV’s default settings.
VGA SETTING
1. H.POSITION: change horizontal position on screen .
2. V.POSITION : change vertical position on screen.
3. CLOCK: change picture horizontal width.
4. FOCUS : Adjust ADC(Analog Digital Converter) focus.
5. AUTO ADJUST: To make optimal video image.
6. COLOR TEMP.: Select video color temperature mode, total 3 mode: Warm、Cool、Personal.
7. PERSONAL: When “color temp” is under “Personal” , Can edit RGB value.
8. RESET :Recall to default.

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Tips
Screen Protection
To avoid permanent damage to the screen, do not use anything abrasive to scratch the display.
Unplug the appliance before you clean the screen. Use a clean, soft cloth to wipe the screen and the enclosure to
remove the dust from the TV. If you want the screen to be cleaner, you can use a clean, wet cloth to wipe. A cleanser
especially designed for LCD screens is recommended. Do not use liquid or spray cleaner.
Warning for Mobile Phones
Since the electromagnetic wave of mobile phones may cause the picture and the sound to become distorted, please
keep away from the TV when using a mobile phone.
Waste Disposal Instructions
We pay great attention to environmental protection. This appliance contains reusable materials.
After you discard the appliance, professional companies can dismantle the discarded appliance to extract any
recyclable materials and minimize the amount of material that has to be disposed of.
Be sure to dispose of the old appliance according to the local regulations.

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2.4 How To Connect
2.4.1 Power Connection
Plug one end of the power cord to the “AC POWER IN” jack in the rear of the TV, and the other end to the 220V
power socket.
If you have not turned off the power and leave TV in standby mode, the TV will continue to consume a residual
amount of power.
When unused for long periods of time, it is best to turn off the power switch on the side of the TV and unplug the
power cord from the socket.
2.4.2 Signal source interface presentation from rear view :
You can connect numerous items of source equipment to your TV. The figure below shows you how to connect
these.
Place the TV on a table with the LCD screen facing down to facilitate easy connection with the external equipment.
Please take precautionary measures to avoid damaging the LCD screen.
1. VGA Signal Input : Display PC host video signal.
2. PC AUDIO Input: Receive sound signal from PC host.
(Figure 3)
2.4.3 How to connect to the PC host.
VGA interface – Connect the one terminal of VGA signal cable to the VGA interface at the rear of the TV ,The other
terminal connect to PC host.
as in Figure.
(Figure 1)
(Figure 2)

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2.4.4 HDMI input
HDMI is the leading new standard for Digital video and audio interconnection. To the HDMI
connector you can connect HDMI devices such as a Set Top Box or compatible DVD-R or
DVD player with HDMI export. So you can display high-definition pictures on this TV in the
digital form.
How to use HDMI:
1.Connect the HDMI cable to the “HDMI” port of this TV, and the other port to the device’s
interface with HDMI export. (as top-left figure).
2.Select the HDMI button in the Remote control
(see bottom-left figure)
3. The HDMI connectors allow the following TV and monitor display mod:
SDTV 720x480i 60Hz/720 x576i 50Hz
EDTV 720x480p 60Hz/ 720x576p 50Hz
HDTV 1920x1080i 50/60Hz
1280x720p 50/60Hz
VGA 640x480 60Hz
Notes:
1.Your TV supports HDCP(High-bandwidth Digital Content Protection).This Is a system for protecting DVD content.
It provides a secure digital link between a video source (DVD,PC,etc.) and your TV. Content is encrypted at the
source device to prevent unauthorized copies from being made.
2.Digital devices from different manufacturers have the possibility of differing output standards which may cause
difficulties for the television to properly display.
3.In case no signal is detected from your HDMI device, turn off the HDMI device and then on again.
4.To get an optimal viewing ,it is advised to turn your DVD player to one of the following TV display
standards:1280x720p 50hz
2.4.5 Connect the audio cable
Connect the PC audio cable supplied with the TV to the TV’s PC Audio Input as in Figure 1.
Note: If no signal is present on the VGA , the TV will enter into standby mode automatically after 1 minute.
1. Analog (Antenna) Input: Connect the antenna or CATV cable to this 75Ωcoaxial cable input .
Note: When no TV signal input, TV set will enter standby status automatically within 10minutes.
2. Audio/Video (AV) Input :
Audio 1 Input: Connect the audio signal source (PC, DVD player, Laser Disc player, videocassette recorder or
camcorder) to the Audio Input ports (left and right).
Video 1 Input: Connect the video signal source (PC, DVD player, Laser Disc player, videocassette recorder or
camcorder) to the Video 1 Input interface.

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Audio 2 Input: Connect the audio signal source (PC, DVD player, Laser Disc player, videocassette recorder or
camcorder) to the Audio Input ports (left and right).
Video 2 Input: Connect the video signal source (PC, DVD player, Laser Disc player, videocassette recorder or
camcorder) to the Video 2 Input interface.
3. S-Video Input:
Connect the S-Video cable to DVD player, Laser Disc player, videocassette recorder or camcorder (Note: For
S-Video, Audio and Video 2 are shared).
4.Component signal Y, Pb/Cb, Pr /Cr Input or HDTV Input:
Connect the component signal source of audio and video (DVD player, Laser Disc player, videocassette recorder
or camcorder) to the Component Input port.
2.4.5 Connect signal cables:
1.User three component signal cables to Connect the high definition signal Y、Pb、Pr or the component signal Y、
Cb、Cr the DVD player outputs to the high definition signal Y、Pb、Pr input of the TV.
2. Use the audio cable to connect the audio output of the DVD player to the TV’s Component Input.

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3. Input/Output Specification
3.1 Input Signal connector
This procedure gives you instructions for installing and using the LCD TV display.
Lay the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord
must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical
conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer
should attach the proper adapter to ensure a safe ground potential.
Connect the 15-pin D-SUB color display shielded signal cable to your signal system device and lock both screws on
the connector to ensure firm grounding. The connector information is as follow:
1
6
11 15
5
10
15 - Pin Color Display Signal Cable
Pin No. Description
1 Red Video
2 Green Video
3 Blue Video
4 Not Used
5 GROUND
6 Red Video Ground
7 Green Video Ground
8 Blue Video Ground
9 Mandatory +5V Supply for PC Bypass
10 Sync. Ground
11 Not Used
12 Serial Data for DDC
13 Horizontal Sync.
14 Vertical Sync.
15 Data Clock for DDC
Apply power to the display by turning the power switch to the "ON" position and allow about ten seconds for Panel
warm-up. The Power-On indicator lights "Green" when the display is on.
With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and
contrast to the most pleasing display, or press auto-adjust to get the best picture-quality.
This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the signal
cable to the PC.
If your TV requires service, it must be returned with the power cord.

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3.2 Factory Preset Display Modes:
Sync Polarity Presence Screen Mode
Dots × Lines Vertical Frequency
(Hz)
Horizontal
Frequency
(kHz) Horizontal Vertical Horizontal Vertical Normal
(4:3) FULL (16:9)
720 × 400 70.1 31.5 NEG POS YES YES YES NO
59.9 31.5 NEG NEG YES YES YES NO
640 × 480 75.0 37.5 NEG NEG YES YES YES NO
60.0 37.9 POS POS YES YES YES NO
800 x 600 75.0 46.87 POS POS YES YES YES NO
1024 x 768 60.0 48.36 NEG NEG YES YES YES NO
1360 x 768 60.0 47.36 POS NEG YES YES NO YES

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4. White Balance, Luminance Adjustment
Instrument List:
Chroma 2225、VG848、Chroma 7120
Adjustment Process:
① Instrument Orientation
Connect LCD-TV、Chroma 2225 and VG848, and set Timing137、Pattern1 on Chroma2225. Chroma7120’s lens
must aim at the center of Pattern1 showed on the LCD-TV’s screen. The distance of Chroma7120’s lens and the
center of screen is 20cm±1cm.
② ENTER FACTORY
After orientation OK, set Pattern104(black picture) on Chroma225.Press 1-9-9-9 on remote to enter the menu
on top left of the screen(refer to fig.1,this menu will show slowly), then from UP key(△) option to enter the menu
(refer to fig.2).
Fig.1

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Fig.2
Fig.3
③PC Mode White Balance Adjustment
Begin to adjust the W/B (White Balance) you should select the Color Temp(Warm and Cold) and enter the son
menu from father menu “Scaler” refer to Fig.2 and Fig.3.
Set channel color temperature value and brightness on Chroma7120.Set 303 319 350(warm Temp) on CH3 and
278 289 350(cold Temp) on CH4.Press MODE key on Chroma7120 to switch xyY mode.
Use black sleeve on Chroma7120’s lens to ensure no external ray. Set Pattern104 on Chroma2225.Adjust
SCALAR RB、GB、BB value to make sure the brightness is the lowest, then set Pattern105 on Chroma2225 and
adjust RG、GG、BG value to make the value displaying on Chroma7120 is about 100.Press “Save” to save. Switch
to CH4, select cold Temp and then adjust it according to above method. Press “Save” to save.
④AV MODE W/B ADJUSTMENT
Begin to adjust AV/COMPONENT YPbPr(480I/576I)/COMPONENT T-scaler(480P/720P/1080I) /HDMI W/B,
their Color Temp modes refer to Fig.4/5/6/7

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Fig.4
Fig.5
Fig.6