AOC TV1764W-2E Schematic

TV1764W-2E

TV1764W-2E SERIES

LCD TV MONITOR

VII

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: Jan-12-2005 Revision: A00

TABLE OF CONTENTS

1. SPECIFICATIONS ….............................................................................…………...…..

1-1 GENERAL SPECIFICATIONS …................................................…………....….

1-2 LCD TV DESCRIPTION ..................................................…………...…………..

1-3 INTERFACE CONNECTOR ......................................................………….....….

2. PRECAUTION AND NOTICES .................................................……………..…………

2-1 ASSEMBLY PRECAUTION ..........................................................…………..….

2-2 OPERATIONG PRECAUTION .....................................................…………..….

2-3 STORAGE PRECAUTION …........................................................…………..….

2-4 HIGH VOLTAGE WARNING .......................................................…………...….

3. D-SUB PIN DISTRIBUTION.........................................................................……………...…

3-1 FACTORY PRESET DISPLAY MODES……………………………………..…...

4. ADJUSTMENT.........................................................................……………...………………….

4-1 ADJUSTMENT FUNCTION.............................................................…………....

4-2 ADJUSTMENTS METHOD .............................................................…………....

4-3 FRONT PANEL CONTROL KNOBS ................................................…………...

5. TROUBLE SHOOTING CHART................................................................………….....

5-1 PANEL CONTROL CIRCUIT TROUBLE SHOOTING……………………………

5-2 MAIN BOARD POWER VCC TROUBLE SHOOTING……………………………

5-3 REMOTE CONTROL BLOCK TROUBLE SHOOTING.………………………….

5-4 KEY BOARD CONTROL BLOCK TROUBLE SHOOTING………………………

5-5 PC CONTROL BLOCK TROUBLE SHOOTING………………………………….

5-6 AUDIO CONTROL BLOCK TROUBLE SHOOTING...............................………

5-7 VIDEO CONTROL BLOCK TROUBLE SHOOTING ........................................

6. WHITE-BALANCE, LUMINANCE ADJUSTMENT………………………………………...

7. SOFTWARE FLOW CHART………………………………………………………………...

8. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY………………………………….

9. PARTS LISTING OF CABINET (BOM)…………………………………………………...

10. PCB LAYOUT..…………………………………………...........................……………...…

10-1 MAIN BOARD PCB LAYOUT.……………………………………………………..

10-2 POWER BOARD PCB LAYOUT…………………………………………………..

10-3 KEYBOARD AND HEADPHONE JACK PCB LAYOUT..……………………..

10-4 IR BOARD PCB LAYOUT…………………………………………………..

11. BLOCK DIAGRAM ........................................................………………………………...

11-1 MAIN BOARD BLOCK DIAGRAM……………………………………………………..…

11-2 POWER BOARD BLOCK DIAGRAM……………………………………………..……..

12. SCHEMATIC DIAGRAM ….......................................................................……………..

12-1 MAIN BOARD SCHEMATIC DIAGRAM………………………………………………….

12-2 POWER BOARD SCHEMATIC DIAGRAM………………………………………………

TV1764W-2E

1. SPECIFICATIONS FOR LCD TV

1-1 GENERAL SPECIFICATIONS

1. LCD TV-PANEL: FUJITSU Active display area (43.2cm) 17.0 inches diagonal

Pixel pitch 0.288mm x 0.288mm Resolution 1024(H) x768 (V) VGA

2. Display Color: 8-bit, 16 Million colors

3. External Controls: (7-key knob) Menu, CH Down, CH Up, Power On/Off, VOL Down, VOL Up, Source

4. OSD Control function:

TO USE THE MENUS

1. Press the MENU button to display each menu

2. Use the cursor up/down to select a menu item.

3. Use the cursor left/right to enter a submenu or enable/disable 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.

TV1764W-2E

Video Adjust

1. CONTRAST, BRIGHTNESS, COLOUR and TINT are adjusted from 0 to 100.

2. BLACK LEVEL is adjusted from 0 to 100.

3. SHARPNESS is adjusted from -5 to+5.

You can adjust picture contrast, brightness, color, tint and sharpness to the levels you prefer.

4. 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.

TV1764W-2E

Audio Adjust

1. VOLUME is adjusted from 0 to 100.

2. BASS and TREBLE are adjusted from 0 to 100. You can adjust picture Volume, Bass and Treble to the levels you prefer.

When adjust any item sub-OSD will show up like this

3. SRS for turn on / off SRS function. SRS is audio technology makes everything sound

better.

TV1764W-2E

Quick Installation

1. Use COUNTRY to select your country first.

2. Move to SCAN and scan the program.

3. After scan finished, user 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

TV1764W-2E

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. Pre-set 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. 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… APPEARS. If you turn the TV off after setting the sleep time, the setting will be erased. Set it again.

TV1764W-2E

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

Color for you can adjust the color temperature you prefer.

PIP

TV1764W-2E

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).

5. Input Source Select: Press repeatedly Source button to select TV, AV, S-VIDEO, SCART, or Graphic (VGA).

6. Input Video Signal: S-Video level 1.0Vpp: NTSC / PAL / SECAM SCART (RGB) level 0.7Vpp: NTSC / PAL / SECAM SCART (Composite) level 1.0Vpp: NTSC / PAL / SECAM Video signal termination impedance 75 Ohm

7. Scanning Frequencies: Horizontal: 31.5 KHz ~ 49 KHz Vertical: 56 Hz ~75 Hz Pixel clock: 50 MHz

8. PC factory Preset Timing: 7 Follow VESA standard timing. Input signal tolerance : H tolerance ± 1 K, V tolerance ±1 Hz

9. Power Source: Switching Mode Power Supply

AC 200 ~ 240 V ± 5%, 50/60 ± 3Hz

10. Operation Temperature: + 0°C ~ + 40°C Storage Temperature: - 10°C ~ + 50°C

10. Humidity: Operation: 10% ~ 85% Storage: 5% ~ 85%

11. Weight for packed: 6 Kg

12. External Connection: RF Input Connector, 15Pin D-type Connector, AC power-Cord

13. View Angle: 170º H/170ºV.

14. Outside dimension: Width x Height x Thickness =560mm x 338mm x184mm.

15. Plug and Play: VESA DDC1/DDC2B

16. Power saving: VESA DPMS

TV1764W-2E

1-2 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, and an Ear phone 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 six 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.

1-3 INTERFACE CONNECTOR

(A) Power Cord Connector. (B) RF Signal Connector. (C) Video / Audio Signal Connectors. (D) PC D-sub 15 pin Connector. (E) PC Audio Connector.

TV1764W-2E

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 -

10°C -50°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 40°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 INVERTER module on Power Board, if carelessly contacted the transformer on this module, can cause a serious shock. (the lamp voltage after stable around 600V, with lamp current around 8mA, and the lamp starting voltage was around 1500V, at Ta=25°C)

TV1764W-2E

PIN NO.

DESCRIPTION

PIN NO.

DESCRIPTION

RED Video

No Pin

GREEN Video

10.

Sync Ground

BLUE Video

11.

Not Used

12.

Serial Data for DDC

Ground

13.

HORIZ. SYNC

Ground-R

14.

VERT. SYNC

Ground-G

15.

Serial Clock for DDC

Ground-B

1611

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

3. S-Video ( Y /C ): TV rear side : 4 pin Mini-DIN female

SCART: TV rear side : SCART female(Red/Green/Blue) TV: TV rear side : IEC type female AV: TV rear side : RCA female (Yellow ) Audio: TV rear side : RCA female (Red / White ) PC Input audio: 3.5mm Stereo female Audio Input for AV, S-Video, SCART : 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 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 :

VGA MODES

Horizontal

Vertical

Resolution

Nominal

Frequency

(KHz)

Sync

Polarity

Nominal

Freq.

(Hz)

Sync

Polarity

720x400

31.5

70.1 P 640x480

31.5

59.9

640x480

37.5

75 N 800x600

37.9

60.3 P 800x600

48.1

72.2 P 1024 x768

48.3

60 N 1280x768

47.7

Analog RGB Signal Timing

TV1764W-2E

4. ADJUSTMENT

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

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, Saturation adjust, Sharpness and Black level adjust, 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.

5.TROUBLE SHOOTING CHART

No Display

Check CN101 pin 42-45 is 5V and signal on pin 35,37,39,40,25-28,3033,15-18,20-23,5-8,10-13

Replace panel or FPC

cable to panel

Check U300 Output to

CN101 relative circuit

and CN101 VCC at

Replace L118, C317

Check U300 crystal

X300 (12MHZ)

Replace X300

Check 2.5V L301-L304

3.3V L305-L308

Replace components if it has problem

Replace U300

5-1. Panel Control Circuit:

TV1764W-2E

5-2. Main Board Power Circuit:

TV1764W-2E

5-3. Remote Control Block:

5-4. Key Board Control Block:

TV1764W-2E

5-5. PC Control Block:

TV1764W-2E

5-6. Audio Control Block:

TV1764W-2E

5-7 Video Control Block:

TV1764W-2E

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” 3、Please re-install program before you do change any component.

TV1764W-2E

Color Temp.

7800(PC Mode)

6500(PC Mode)

7800(AV Mode)

0.296

0.313

0.296

0.311

0.329

0.311

250±7

300±7

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 7800 color, MEM. channel 2 to 6500 color, and MEM. channel 3 to 7800 color, (7800 parameter is x =296 ± 15,

y = 311 ± 15, Y = 250 ± 7 cd/m2(PC Mode); 7800 parameter is x =296 ± 15, y = 311 ± 15, Y = 300 ± 7 cd/m2(AV Mode) ; 6500 parameter is x = 313 ± 15, y = 329 ± 15, Y = 250± 7 cd/m2(PC Mode))

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 100  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 7800, 6500, 7800 color temperature. R9, R6, RT, RH Recall 7800, 6500, 7800 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.

I. Before adjustment :

1. Press Number key 1  9  9  1 into Engineer Mode.

2. Press menu key repeat to “ADC “ page, select “EEinit” and press “right” key to initial

EEPROM.

3. Press Number key 1  9  9  9 into the Factory Mode.

TV1764W-2E

II. Gain adjustment :

A. adjust 7800 color-temperature(PC Mode):

1. Set the Contrast of OSD function to 45 and Adjust Brightness to chroma-7120 (x =296, y =

311，Y=250 cd/m2)

2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)

3. Switch the MEM.channel to Channel 01 (with up or down arrow on chroma-7120)

4. The lcd-indicator on chroma-7120 will show x = 296 ± 15, y = 311± 15, Y = 250± 7 cd/m2

5. Adjust the Color(user)Mode: RED on OSD window, until chroma 7120 indicator reached the

value R=100

6. Adjust the Color (user) Mode: GREEN on OSD window, until chroma-7120 indicator reached

the value G=100

7. Adjust the Color (user) Mode: BLUE on OSD window, until chroma-7120 indicator reached

the value B=100

8. Repeat above procedure (Item 5,6,7) until chroma-7120 RGB value meet the tolerance

=100±2

9. switch the chroma-7120 to xyY mode With press “MODE” button

10. Press Color (7800) on OSD window to save the adjustment result

B. adjust 6500 color-temperature(PC Mode):

1.Set the Contrast of OSD function to 45 and Adjust Brightness to chroma-7120(x =313, y =

329，Y=250 cd/m2)

2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)

3. switch the MEM. channel to Channel 02 ( with up or down arrow on chroma-7120 )

4. The lcd-indicator on chroma-7120 will show x = 313 ± 15, y = 329 ± 15, Y = 250± 7 cd/m2

5. Adjust the Color (user) Mode: RED on OSD window, until chroma 7120 indicator reached the

value R=100

6. Adjust the Color (user) Mode: GREEN on OSD window, until chroma-7120 indicator reached

the value G=100

7. Adjust the Color (user) Mode: BLUE on OSD window, until chroma-7120 indicator reached the

value B=100

8. Repeat above procedure (item 5,6,7) until chroma-7120 RGB value meet the tolerance =100 ±

9. switch the chroma-7120 to xyY mode With press “MODE” button

10. Press Color (6500) on OSD window to save the adjustment result

C. adjust 7800 color-temperature(AV Mode):

1. Set the Contrast of OSD function to 45 and Adjust Brightness to chroma-7120 (x =296, y =

311，Y=300 cd/m2)

2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)

3. Switch the MEM.channel to Channel 03 (with up or down arrow on chroma-7120 )

4. The lcd-indicator on chroma-7120 will show x = 296 ± 15, y = 311 ± 15, Y =300 ± 7 cd/m2

5. Adjust the Color(user)Mode: RED on OSD window, until chroma 7120 indicator reached the

value R=100

6. Adjust the Color(user)Mode: GREEN on OSD window, until chroma-7120 indicator reached

the value G=100

7. Adjust the Color(user)Mode: BLUE on OSD window, until chroma-7120 indicator reached the

value B=100

TV1764W-2E

8. Repeat above procedure (item 5,6,7) until chroma-7120 RGB value meet the tolerance =100 ±

9. Switch the chroma-7120 to xyY mode With press “MODE” button

10. Press Color (7800) on OSD window to save the adjustment result

Turn the POWER-button off to quit from factory mode (in USER-mode, the OSD window location was placed at middle of screen)

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