AOC TV2764W-2E User manual

AOC TV2764W-
2E
- 0 -
S
SE ER RV VI IC CE E M MA AN NU UA AL L
LCD TV MONITOR
TV2764W-2E
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT
HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE
ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA ：AUG.-23-2005 Revision：A00

1
TABLE OF CONTENTS
PAGE
1. SPECIFICATIONS FOR LCD TV ...........................................................…………...….. 2
1-1 GENERAL SPECIFICATIONS …................................................…………....…. 2
1-2 OPERATING INSTRUCTIONS ..................................................…………...………….. 3
1-2-1 USE OF THE REMOTE CONTROL ..................................…………....…………… 3
1-1-2 TO USE THE MENUS .............................................…………. ……………...… 5
1-3 LCD TV DESCRIPTION ..................................................…………...………….. 8
1-4 INTERFACE CONNECTOR ......................................................………….....…. 8
2. PRECAUTION AND NOTICES .................................................……………..………… 9
2-1 ASSEMBLY PRECAUTION ..........................................................…………..….
9
2-2 OPERATIONG PRECAUTION .....................................................…………..….
9
2-3 STORAGE PRECAUTION …........................................................…………..….
9
2-4 HIGH VOLTAGE WARNING .......................................................…………...….
9
3. D-SUB PIN DISTRIBUTION .........................................................................…………… 10
3-1 FACTORY PRESET DISPLAY MODES …………………………………….…..... 11
4. ADJUSTMENT .........................................................................……………...………… 12
4-1 ADJUSTMENT CONTROL FUNCTION ..............................................……….... 12
4-2 ADJUSTMENTS METHOD .............................................................………….... 12
4-3 FRONT PANEL CONTROL KNOBS ................................................…………... 12
5. TROUBLE SHOOTING CHART ................................................................…………..... 13
5-1 PANEL CONTROL CIRCUIT TROUBLE SHOOTING ………………………… 13
5-2 MAIN BOARD POWER VCC TROUBLE SHOOTING ………………………… 14
5-3 REMOTE CONTROL BLOCK TROUBLE SHOOTING .………………………. 14
5-4 KEY BOARD CONTROL BLOCK TROUBLE SHOOTING ……………………… 15
5-5 PC CONTROL BLOCK TROUBLE SHOOTING ………………………………. 15
5-6 AUDIO CONTROL BLOCK TROUBLE SHOOTING ..............................……… 17
5-7 VIDEO CONTROL BLOCK TROUBLE SHOOTING ......................................... 18
6. WHITE-BALANCE, LUMINANCE ADJUSTMENT ……………………………………... 19
7. SOFTWARE FLOW CHART ……………………………………………………………... 21
8. PARTS LISTING OF CABINET (BOM) …………………………………………………... 24
9. PCB LAYOUT ...………………………………………...........................……………...… 47
9-1 MAIN BOARD ……………………………………………….. 47
9-2 ADAPTER BOARD PCB ……………………………………………….. 48
9-3 DC TO DC BOARD PCB ...……………………………………………….. 49
9-4 HEADPHONE BOARD PCB …………………………………………….. 49
9-5 IR BOARD PCB ...…………………………………….. 49
9-6 KEY BOARD PCB ……………………………………………………… 49
10. SCHEMATIC ........................................................………………………………... 50
10-1 MAIN BOARD ……………………………………………..… 50
10-2 POWER BOARD ……………………………………………..… 61
11. BLOCK DIAGRAM ........................................................…………………………... 53
12. DEXPLDING DIAGRAM ...........................................………………………………... 64

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1. SPECIFICATIONS FOR LCD TV
1-1 GENERAL SPECIFICATIONS
Items Specifications
LCD Panel
Screen Size 27” TFT-LCD
Aspect Ratio 16:9
Display Area (opening) 603.22mm x 341.98mm (H x V)
TV Function
TV Tuning System
PAL B/G, D/K, I and SECAM L/L’
(Multi-Europe)
Full Channel with Electronic PLL Tuner
Sound System Nicam / A2
Teletext Yes
Color systems PAL / SECAM / NTSC
PC Input
Signal Input Analog: D-Sub 15 pin (detachable cable)
PnP compatibility DDC 2B
Recommended Analog 1024x 768(60Hz)
Input Audio Headphone Mini-jack for stereo (3.5ø)
Audio Output Audio Output: L / R
Speaker (built-in): Two 5 watt speakers
Headphone Mini-jack for stereo (3.5ø)
Line Output (SCART L/R)
Other Function PIP (in PC Mode)
OSD language English / French / Germany / Italian / Spanish / Portuguese
Table Stand Included
Wall Mount VESA 100 x 100 mm
Power Power Supply AC100V~240V, 50/60Hz
Power Consumption 100W. max <140W
Panel Tilt Forwards/ Backwards/ Rotation -5° / +20° / ± 35°
Dimension W x H x D (with stand) 898 x 470 x 287 (mm)
Weight (net) Kg (w/o Accessories) 13.4 KG
Accessories
Remote Controller, Batteries (x2), AC Power Cord, User Manual,
Warranty Statement, Quick Setup Card
Video Inputs
SCART (RGB+CVBS) x 1,CVBS x 1 Audio L/R x 2
RCA CVBS (Composite) x 1 Audio L/R x 1
S-Video S-Video x 1 Share with CVBS (RCA)

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1-2 OPERATING INSTRUCTIONS
1-2-1 USE OF THE REMOTE CONTROL
POWER:
Press to turn on/off the TV. The TV
is never completely powered off
unless it is physically unplugged.
VOL
Press + or – (or MENU or
button) to increase or decrease the
volume.
CH
Press or (or MENU ▲or ▼
button) buttons to scroll through the
channels.
MENU
Press this key to display
main menu.
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 0, 30, 60, 90,120
minutes. The timer begins to count
down from the number of minutes
selected after the display has
disappeared.
0~9 DIGIT BUTTONS
To select a TV channel.
TV/VIDEO
Select your input source: press
repeatedly to select TV, AV, S-VIDEO
or SCART mode, according to where
you connected your external source.
MUTE
Temporarily interrupt the sound
or restore it.
PRE-CH
To display the previously selected
TV channel.
SOUND
To select Mono/ Stereo /Dual from TV
RF input.
PC
Select your input source to PC.
DISPLAY
Press this key to display:
(1) the channel number when
watching a TV program.
(2) the input source when
watching an AV program.
SIZE
Press this key repeatedly
to select desired picture
format (4:3, CINERAMA,
16:9)
SWAP
Press to swap the two screens
when POP is work (option).
PIP/POP
Press this key to display PIP screen
(only in PC mode).
POP is not available on this model.
SUBPAGE
Teletext Sub-page function.
Teletext function and buttons will be described on next page.

4
TELETEXT
Teletext is an information service organized like a magazine, which is provided by some TV stations in addition to
regular television broadcasting.
TELETEXT
Press TELETEXT. The Teletext screen appears.
To turn off the Teletext mode, press TELETEXT again.
MIX
Press MIX to superimpose the teletext over a normal
broadcast picture. Press again to return to Teletext mode.
SIZE
Press SIZE repeatedly to display the upper teletext part,
the lower teletext part and then to return to the normal.
RED / GREEN / YELLOW / BLUE
Use the COLOURED BUTTONS to operate the Teletext
screen.
INDEX
Press INDEX to return to the main index page.
SUBTITLE
Press to select the next page marked as a subtitle page and
request it as the display page.
HOLD
Press HOLD to hold the Teletext page when viewing
information. Press again to return to automatic page update.
REVEAL
Press REVEAL to display reveal hidden words e.g. quiz page
answers. Press again to hide.
PAGE SELECTION
Page can be selected in two ways.
a. Press ▼or ▲ to increase or decrease the page number by one.
b. By entering the page number, using digit buttons 0~9.
SUBPAGE ACCESS
When Teletext information exceeds more than one page. Press SUBPAGE first then select the required
page number using digit buttons 0~9.

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1-2-2 To use the menus
1. Press the MENU button repeatedly to display each menu.
2. Use the cursor up/down to select a menu item or adjust the setting of Menu item.
3. Use the cursor left/right to enter a submenu or enable the function.
4. Press the MENU button to exit the menu.
MAIN MENU
Press the MENU button into the main OSD (On Screen Display). Adjust item include VIDEO, AUDIO, TV (only in the
TV mode),PC and PIP (only in the PC mode) and SETUP.
VIDEO Adjust
1. CONTRAST, BRIGHTNESS, COLOUR and TINT are adjusted from 0 to 100.
2. SHARPNESS is adjusted from -5 to +5.
You can adjust picture contrast, brightness, color, tint and sharpness to the levels you prefer.
3. RESET is set up to default value.
Note: TINT only work in NTSC video signal input.
When adjust any item sub-OSD will show up like this.
AUDIO Adjust
1. VOLUME is adjusted from 0 to 100.
2. BASS and TREBLE are adjusted from 0 to 100.
3. SRS for turn on / off SRS function. SRS is an audio technology which improves sound quality.
You can adjust picture Volume, Bass and Treble to the levels you prefer.

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When adjust any item sub-OSD will show up like this.
TV
Quick Installation
1. Use COUNTRY to select your country first.
2. Move to SCAN and scan the program.
3. After scan finished, you can use SKIP to skip the unlike program.
PROGRAM Editing
Using PROGRAM, FREQENCY, SWAP, and INSERT for program edit.
1. Move to PROGRAM, select the program you want to edit
2. Move to FREQENCY, use RIGHT or LEFT button for program search.
3. User can use SWAP for program swap.
4. Use INSERT to insert current program into selected position.
SETUP
1. BLUE SCREEN for when no video input screen will be blue or blank. If it’s ON, the screen will be in blue. If it’s
OFF, the screen will be blank. Preset is ON.
2. LANGUAGE for different language OSD MENU. Preset is English.
3. SLEEP TIMER is for set a time period after which the TV should switch itself to standby. The counter runs from
0 > 30 > 60 > 90 > 120 minutes.
4.
TELETEXT
: Using / buttons, select the character set that wil be used for Teletext on this channel.
The following character sets are available: WEST EUROPE, EAST EUROPE, ARABIC, GREEK, CYRILLIC.
The character set determines how characters are displayed on Teletext screen.
5. RESET is set up to default value of BLUE SCREEN and SLEEP TIMER.
Note: To view the remaining time, press the SLEEP button once. To cancel the sleep time, repeatedly press the
SLEEP button until a notice APPEARS. If you turn the TV off after setting the sleep time, the setting will be erased.
Set it again.

7
PC Setup
PC Adjust
1. AUTO TUNE is the function auto-sizing for VGA input.
2. CONTRAST, BRIGHTNESS, FOCUS, CLOCK, H-POSITION, V-POSITION and COLOUR are the functions for
PC adjustment.
COLOUR
Colour for you can adjust the colour temperature you prefer.
PIP
1. PIP for turn on / off small picture function.
2. POSITION for change the position of small picture.
3. SOURCE for select video source of small picture.
4. SOUND for select audio source form MAIN (PC) or SUB (Video).

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1-3 LCD TV DESCRIPTION
The LCD TV will contain a main board (include audio), a switching power board (include an inverter board),
an IR board, a function keyboard, an I/O board and a Headphone board. The main board and power board
will house the flat panel to control logic I2C bus, DDC, brightness control logic for LCD panel, DC-DC
conversion to supply the appropriate power to the whole board and transmitting TTL level signals into LCD
Module to drive the LCD display circuit.
The inverter board will drive the fourteen CCFLs (Cold Cathode Fluorescent Tube).
The switching power board will provides the power ON/OFF to control the TV and control LED indicator for
DPMS.
The function keyboard and Remote Control will provide the OSD control signal to the Main Board.
1-4 INTERFACE CONNECTORS
All signal connections to this product are via external connectors locating at the rear of the product. The
specifications of these connectors are listed in the following table.
External Connector Specification
AC-In AC Jack 3-male receptacle
RGB Input
Molded-over, shielded, 15-pin subminiature D male plug with75Ω
impedance. C
ompliance with PC 99 Color Theme. Refer to
Appendix B for pin layout. Molded-over, shielded, 21-pin subminiature
D male plug with75Ωimpedance. (black)
Audio Input (L/R) RCA Jack (White/Red)
Audio Input 3.5 Mini Jack for PC Audio
Headphone Output 3.5 Mini Jack
Composite Video RCA Jack (Yellow)
CVBS Input
Molded-over, shielded, 21-pin subminiature D male plug with75Ω
impedance.(black)
S Video 4 Din Jack

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2. PRECAUTIONS AND NOTICES
2-1 ASSEMBLY PRECAUTION
(1) Please do not press or scratch LCD panel surface with anything hard. And do not soil LCD panel surface
by touching with bare hands (Polarize film, surface of LCD panel is easy to be flawed)
In the LCD panel, the gap between two glass plates is kept perfectly even to maintain display
characteristic and reliability. If this panel is subject to hard pressing, the following occurs:
(a) Uniform color (b) Orientation of liquid crystal becomes disorder
(2) Please wipe out LCD panel surface with absorbent cotton or soft cloth in case of it being soiled.
(3) Please wipe out drops of adhesive like saliva and water in LCD panel surface immediately.
They might damage to cause panel surface variation and color change.
(4) Do not apply any strong mechanical shock to the LCD panel.
2-2 OPERATING PRECAUTION
(1) Please be sure to unplug the power cord before remove the back-cover. (be sure the power is turn-off)
(2) Please do not change variable resistance settings in MAIN-BOARD; they are adjusted to the most
suitable value. If they are changed, it might happen LUMINANCE does not satisfy the white balance
spec.
(3) Please consider that LCD backlight takes longer time to become stable of radiation characteristic in low
temperature than in room temperature.
(4) Please pay attention to displaying the same pattern for very long-time. Image might stick on LCD.
2-3 STORAGE PRECAUTION
(1) When you store LCD for a long time, it is recommended to keep the temperature between 0°C -40°C
without the exposure of sunlight and to keep the humidity less than 85% RH.
(2) Please do not leave the LCD in the environment of high humidity and high temperature such as 60°C,
85%RH.
(3) Please do not leave the LCD in the environment of low temperature; below -25°C.
2-4 HIGH VOLTAGE WARNING
The high voltage was only generated by Power support part, if carelessly contacted the transformer on
this module, can cause a serious shock.

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3. D-SUB PIN DISTRIBUTION
This procedure gives you instructions for installing and using the LCD TV display.
1.Position 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.
2. Connect the 15-pin 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:
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
GROUND
4 GROUND 12 Bi-directional Data (SDA) for PC Bypass
5
GROUND
13
Horizontal Sync.
6 Red Video Ground 14 Vertical Sync.
7
Green Video Ground
15
Data Clock (SCL) for PC Bypass
8 Blue Video Ground
3. S-Video (Y /C): TV rear side : 4 pin Mini-DIN female
SCART: TV rear side : RCA female
TV: TV rear side : IEC type female
AV1: TV rear side : RCA female (Yellow)
Audio: TV rear side : RCA female (Red / White)
PC Input audio: 3.5mm Stereo female
Audio Input for AV1, S-Video, SCART Video : RCA female (Red / White)
Headphone 3.5mm female
Audio line Out (to another speaker) : RCA female (Red / White)
4. 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.
5. With proper signals feed to the display, a pattern or data should appear on the screen, adjust the
1
6
11
15
5
10

11
brightness and contrast to the most pleasing display, or press auto-adjust to get the best picture-quality.
6. This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the
signal cable to the PC.
7. If your TV requires service, it must be returned with the power cord.
3-1 Factory Preset Display Modes:
Analog RGB Signal Timing
MODE ASPECT RATIO HANDLING
STANDARD RESOLUTION
FS*
Full-Screen
AR
Aspect Ratio
1:1
720x400 @ 70Hz 1280 x 768 1024 x 768 N/A
640x480 @ 60Hz 1280 x 768 1024 x 768 N/A
640x480 @ 72Hz 1280 x 768 1024 x 768 N/A
640x480 @ 75Hz 1280 x 768 1024 x 768 N/A
VESA 800x600 @ 60Hz 1280 x 768 1024 x 768 N/A
VESA 800x600 @ 72Hz 1280 x 768 1024 x 768 N/A
VESA 800x600 @ 75Hz 1280 x 768 1024 x 768 N/A
MAC 832x624 @ 75Hz 1280 x 768 1024 x 768 N/A
MAC 1024x768 @ 75Hz 1280 x 768 1024 x 768 1024 x 768
VESA 1024x768 @ 60Hz 1280 x 768 1024 x 768 1024 x 768
1280x720 @ 60Hz 1280 x 768 1024 x 768 N/A
4. ADJUSTMENT

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4-1 ADJUSTMENT CONTROL FUNCTION
Adjustments items as below:
4-1-1 Power On / Off.
4-1-2 PC
Auto adjustment for Brightness, Contrast, Pixel Clock Frequency, Focus. Picture H / V Position and
Color Temperature.
Recall Cool, Warn and User color adjust for Color Temperature.
4-1-3 PIP
PIP On/Off control, Position Select, Video source select, Audio main/sub Select.
4-1-4 TV
Channel Up / Down, Channel Search, Volume Bass / Treble adjusts.
Blue screen / Language / System / CH swap /Manual scan / CH Del Add
Reset.
4-1-5 Video
Brightness and Contrast adjust, Sharpness. Color and Tint adjust, Reset
4-1-5 Audio
Volume, Bass and Treble adjust, SRS On/Off control, Reset.
4-2 ADJUSTMENT METHOD
Press MENU key to show OSD window or exit, Up / Down key to done the function selection,
And + / - key to done the adjustment.
4-3 FRONT PANEL CONTROL KNOBS
Power Key: Press to turn on or off the TV.
MENU Key: Press to show the OSD menu and exit OSD menu at the TV.
Down / Up Key: Press to perform select function and channel.
- / + Key: Press to confirm your function selection and adjustment.
Source Key: Press to select your input source.

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5. TROUBLE SHOOTING CHART
5-1 PANEL CONTROL CIRCUIT

14
5-2 MAIN BOARD POWER VCC:
5-3 ROMOTE CONTROL BLOCK:

15
5-4 KEY BOARD CONTROL BLOCK
5-5 PC CONTROL BLOCK:

16

17
5-6 AUDIO CONTROL BOCK:

18
5-7 VIDEO CONTROL BLOCK:
Note: 1、If Replace “MAIN-BOARD” , Please re-do “DDC-content” programmed & “WHITE-Balance”.
2、If Replace “ POWER-BOARD INVERTER” only, Please re-do “ WHITE-Balance”

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6. White-Balance, Luminance adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
Before started adjust white balance, please setting the Chroma-7120 MEM. Channel 1 to 9300 color, MEM.
Channel 2 to 6500 color, and MEM. Channel 3 to 9300 color, (our 9300 parameter is x = 283 ±15, y = 297 ± 15, Y
= 350 ± 7 cd/m2 ; 6500 parameter is x = 313 ± 15, y = 329 ± 15, Y = 350± 7 cd/m2)
PC MODE
TV MODE
Color Temp.
9300
6500
9300
X
0.283
0.313
0.283
Y
0.297
0.329
0.297
Y
350±7
350±7
450±7
How to setting MEM. Channel you can reference to Chroma-7120 user guide or simple use “SC” key and “NEXT”
key to modify x, y, Y value and use “ID” key to modify the TEXT description
Following is the procedure to do white-balance adjust
˙Press Number key 19 9 9 will into the factory mode, and press Menu key the OSD will show menu and a
word F at Right top of Menu.
˙In the factory mode select MORE function will into Bias and Gain adjustment.
1. ADC Adjustment:
AL Auto level adjust.
RG, GG, BG R, G, B Gain adjust.
RB, GB, BB R, G, B Bias adjust.
2. SCALER Adjustment:
CO, BR Contrast and Brightness adjust.
RG, GG, BG R, G, B Gain adjust.
RB, GB, BB R, G, B Bias adjust.
S9, S6, ST , SH Save 9300, 6500, 9300 color temperature.
R9, R6, RT , RHRecall 9300, 6500, 9300 color temperature.
BI Setup Burn-in mode ON / OFF.
ISP Set ISP ON/OFF .
PP Set PIP ON/OFF .
WH Set Wireless Headphone ON/OFF.
SR Set SRS ON/OFF.
CC Set Close Caption ON/OFF.
VC Set V Chip ON/OFF.
EX Exit MORE function to factory mode menu.
II. Bias (Low luminance) adjustment :
1. Press “AUTO” button,
2. Set the contrast on OSD window to the value=51 , color (user )R,G,B set to “50”
3. Adjust the brightness on OSD until chroma 7120 measurement reach the value Y>390 cd/m2
III. Gain adjustment :
A. Adjust 9300 color-temperature: