AOC L32W931 Diagram

32″LCD TV AOC L32W931

Service

31.5~48 KHz

Table of Contents

Description Page Description Page

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……..……………….…….……….....10

2.4 Front Panel Control Knobs…….………….……….....15

3. Input/Output Specification…………....................…....16

4. Mechanical Instructions…………………….................18

5. Repair Flow Chart ……………………….…….…….....21

6. PCB Layout ………………..…………………....….......26

6.1 Main Board…………..………………...…….…….......26

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS

6.2 Power Board………………..…….…….……….......28

6.3 Inverter Board……………..…….…….……….......29

6.4 Key Board………………………..……..……….......31

6.5 IR Board………………………….……..……….......31

7. Adjustment……..………………………….................31

8. Block Diagram.…….................................................33

9. Schematic Diagram…..…………....………………...35

9.1 Main Board…………………………………...….......35

9.2 Power Board…………..….….……...………….......45

9.3 Inverter Board…………..….……...………….......47

9.4 Key Board……………….……….…………….........49

9.5 IR Board……...………….……….…………….........50

10. Exploded View………………………………….…...51

11. BOM List……………….………………….………….52

Horizontal Frequency

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

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.)

Revision List

Version Release Date Revision Instructions TPV Model

E329MANS4WACNN

A00 Nov.18,2009 Initial Release

E329MANS4WAENN

E329MANS4WE6NN

A01 Jan.19,2009

Add new models, lead in the new inverter board(PCB P/N:715G3690P01000003M)

E329MANS4WAE5N

E329MANS4WE7NN

1. General Specification

2. Operating Instructions

2.1 The Use of Remote Control

2.2 To Use the Menus

1. Press the MENU/EXIT button to display or close the main menu.

2. Use the Navigation Ring to move around to select, adjust or confirm an item in the OSD (On Screen Display) menu. Press the MENU/EXIT button to enter the main OSD. Adjust the items including Video menu, Audio menu, Feature menu, Parental menu, Channel menu and VGA menu. However, some function items in the menus may only be enabled in the particular source modes.

Channel Menu

The Channel menu in TV mode shows as below.

1. Program No.: Shows the current channel number.

2. Tuning mode: Select the mode of TV signal as Cable or Air.

3. System standard: Can set as NTSC-M, Auto, PAL-M or PAL-N. Advise please do not change this item after auto search action.

4. Auto search: Select "Auto Search" to search all signaled channel; when the searching is complete, it stays at the first channel with signal and all channels that have been located are stored. If you would like to stop "Auto Search" during the process, simply by pressing the MENU/EXIT button.

5. Fine tuning: Fine tune the frequency of current channel.

6. AFC: AFC can be set to ON or OFF. Set to ON, the TV will search signal automatically; when there is any offset in the signal, will automatically adjust the channel to the correct frequency.

7. Skip: Skip can be set to ON or OFF. When it is set to ON, a channel can be skipped by pressing the switching button on the remote control or on the front panel.

VIDEO 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 mode, the Video menu simply provides Preset, Contrast, Brightness, Color Temp and Size items.

1. Preset: Designed for different types of video mode. Can select Personal, Standard, Vivid, Movie and ECO mode.

2. Contrast: Video contrast adjustment, can adjust only when Preset is setted as Personal. The tuning range is 0 ~

100.

3. Brightness: Video brightness adjustment, can adjust only when Preset is setted as Personal.The tuning range is 0 ~ 100.

4. Color: Video color chroma adjustment, can adjust only when Preset is setted as Personal. The tuning range is 0 ~

100. (Not support in HIDMI source mode.)

5. Tint: Video tint adjustment, Can only select with NTSC signal.the tuning range is -50 ~ +50. (Not support in YPbPr and HIDMI source mode.)

6. Sharpness: Video sharpness adjustment, the tuning range is 0 ~ 100. (Not support in HIDMI source mode.)

7. Noise reduction: Designed for different noise reduce effect, user can select off, Low, Normal and High.

8. Color temp: There are three options of colour temperature provided for users - warm, normal and cool.

9. Size: There are various functions provided for zoom in or zoom out. Can select Normal, Zoom1, Zoom2 and Wide.

AUDIO MENU

The Audio menu in TV mode shows as below. It provides audio adjustment for user to modify the audio setting.

1. Preset: Designed for different types of sound mode. Can select Personal, Music and Speech.

2. Bass: Bass tone adjustment, can adjust only when Preset is setted as Personal.The tuning range is -10 ~10.

3. Treble: Treble tone adjustment, can adjust only when Preset is setted as Personal. The tuning range is -10~10.

4. Balance: Audio balance adjustment, the tuning range is -10~10.

5. Virtual Surround: It can create the perception that there are many more sources of sound than are actually present.

6. AVL:Choose On or off to adjust volume to be consistent across programs and channels automatically.

FEATURE MENU

The Feature menu in TV mode shows as below. 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. Menu language: There are four language options provided - English, French, Spanish and Portuguese.

2. Menu timeout: Adjust the time of menu display.

3. Sleep timer: Function with which you can set a time period after which the TV should turn itself off. You can set it as off, 15m, 30m, 45m, 60m, 90m, 120m.

4. Super contrast: Enhances the contrast of the color saturation. You can select On (default) or Off.

5. Light sensor: You can select On or Off(default).

6. DCR: dynamic contrast.

7. Caption control: Select CC channel as On, CC on, when mute or Off.

8. Analog Caption: Select analog caption as CC1, CC2, CC3, CC4, TT1, TT2, TT3, TT4, Off.

9. Reset all: Reset all OSD setting to default value.

PARENTAL MENU

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. Enter the Child Lock item, then the user can modify the restricted table about MPAA or TV Rating respectively. While exiting the sub-menu, the parental control function is working. (The default password is: 0 0 0 0.)

Setting the Parental Control level To set the Parental Control level:

1. Press MENU. The on-screen menu opens with Picture highlighted.

2. Press

3. Press ENTER, enter the password (default password is 0000), then press ▼ or ▲ to highlight Password setting.

or to select System, then press ▲ or ▼ to highlight Parental Control.

4. Press ENTER, then press

5. To set the MPAA rating, press ▼ or ▲ to highlight MPAA rating, then press The rating you locked and all higher ratings will be locked. You can select G, PG, PG-13, R, NC-17, X or Off.

6. To set the PG rating, press ▼ or ▲ to highlight PG rating, then press The PG rating screen opens.

to set Child lock to Off.

to select the rating you want to lock.

7. Press higher ratings will be locked.

8. To set the Canadian English rating, press ▼or ▲ to highlight Can. Englishor, then press you want to lock. The rating you locked and all higher ratings will be locked. You can select E, C, C8+, G, PG, 14+, or 18+.

9. To set the Canadian French rating, press ▼or ▲ to highlight Can. French, then press to select the rating you want to lock. The rating you locked and all higher ratings will be locked. You can select E, G, 8+, 13+, 16+, or 18+.

10. Channel Lock: Select channel lock or not. 11. Video Lock: Select source lock or not. 12. Press MENU/EXIT to close the menu. 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』.

▼or ▲ to select a rating, then press ENTER to lock or unlock the rating. The rating you locked and all

to select the rating

VGA MENU

This option only shows and is available in VGA mode, which provides several items for the VGA display fine tuning.

1. Auto Adjust: Adjust the settings automatically.

2. H-Position: Adjust the horizontal position of the picture. (0-100)

3. V-Position: Adjust the vertical position of the picture. (0-100)

4. Clock: Adjust picture clock to reduce Vertical-Line noise. (0-100)

5. Phase: Adjust Picture Phase to reduce Horizontal-Line noise. (0-100)

2.3 How to Connect

Connecting Equipment

Using Your Antenna or Cable for TV

1. Turn off the TV.

2. Connect the coaxial (RF) connector from your antenna or cable (out-of-the-wall, not from the Cable Box) to the ANTENNA connector at the rear of the TV.

3. Turn on the TV.

4. Select TV using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV, or pressing the TV button on the Remote Control.

5. Connect the AV OUT and AV IN of the other TV,the signal will display on the other TV.

Using the Antenna or Cable for your VCR

1. Turn off the TV.

2. Connect the “Output to TV”, “RF Out” or “Antenna Out” connector on the rear of your VCR to the ANTENNA connector at the rear of the TV.

3. Turn on the TV.

4. Select TV using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the TV button on the Remote Control.

5. Connect the AV OUT and AV IN of the other TV,the signal will display on the other TV.

Connecting Your TV Set-Top Box Using HDMI

TV Set-Top Boxes that have a HDMI digital interface should be connected to the HDMI input of the LCD TV for optimal results.

Using Component Video Connecting your TV Set-Top Box (Better):

1. Turn off the TV and TV Set-Top Box.

2. Connect the Pr (red color) connector on your TV Set-Top Box to the corresponding Pr (red color) connector in the Component group.

3. Connect the Pb (blue color) connector on your TV Set-Top Box to the corresponding Pb (blue color) connector in the Component group.

4. Connect the Y (green color) connector on your TV Set-Top Box to the corresponding Y (green color) connector in the Component group.

5. Using an audio cable (red and white connectors), connect the cable to the audio output connectors associated with the Component output on your TV Set-Top Box and connect the other end to the audio connectors associated with the Component.

6. Turn on the TV and TV Set-Top Box.

7. Select YPbPr using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the COMP button on the Remote Control.

Connecting Your Basic Set-Top Box Using Composite Video

1. Turn off the TV and Set-Top Box.

2. Using an AV Cable, connect the Video (yellow color) connector on your Set-Top Box to the corresponding Video (yellow color) connector in the AV group at the rear of the TV.

3. Using the red and white connectors, connect the cable to the audio output connectors associated with the Video output on your Set-Top Box and connect the other end to the audio connectors associated with the AV input at the rear of the TV.

4. Turn on the TV and Set-Top Box.

5. Select AV-1 using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the VIDEO button on the Remote Control.

Using Coax (RF)

1. Turn off the TV.

2. Using a Coax (RF) cable, connect one end to the TV .

3. Turn on the TV.

4. Select TV using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the TV button on the Remote Control.

Connecting Your DVD Player Using HDMI

DVD players that have a digital interface such as HDMI (High Definition Multimedia Interface) should be connected to the HDMI input of the LCD TV for optimal results.

Connecting your DVD Player (Best)

1. Turn off the TV and DVD player.

2. Connect a HDMI cable to the HDMI output of your DVD player and the other end to the HDMI Input at the rear of the TV.

3. Turn on the TV and DVD player.

4. Select HDMI using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the HDMI/PC button on the Remote Control.

For DVD Players with DVI:

1. Turn off the TV and DVD player.

2. Using a HDMI-DVI cable, connect the DVI end to your DVD player and the HDMI end to the HDMI Input at the rear of the TV.

3. Turn on the TV and your DVD player.

4. Select HDMI using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV, or directly by pressing the HDMI/PC button on the Remote.

Using Component Video Connecting your DVD Player (Better)

1. Turn off the TV and DVD player.

2. Connect the Pr (red color) connector on your DVD player to the corresponding Pr (red color) connector in the Component at the rear of the TV.

3. Connect the Pb (blue color) connector on your DVD player to the corresponding Pb (blue color) connector in the Component group at the rear of the TV.

4. Connect the Y (green color) connector on your DVD player to the corresponding Y (green color) connector in the Component group at the rear of the TV.

5. Using an audio cable (red and white connectors), connect the cable to the audio output connectors associated

with the Component output on your DVD player and connect the other end to the audio connectors associated with the Component input at the rear of the TV.

6. Turn on the TV and DVD player.

7. Select Component using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the COMP button on the Remote Control.

Using S-Video (AV-2) Connecting your DVD Player (Good):

1. Turn off the TV and DVD player.

2. Connect the S-Video jack on the rear of your DVD player to the S-Video jack in the AV group on the rear of the TV.

3. Connect an audio cable (white and red connectors) to the audio output connectors associated with the S-Video output on your DVD player and connect the other end to the audio connectors associated with the AV input on the rear of the TV.

4. Turn on the TV and DVD player.

5. Select AV-2 using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV, or directly by pressing the VIDEO button on the Remote Control.

Using Composite (AV) Video Connecting your DVD Player (Good)

1. Turn off the TV and DVD player.

2. Connect the Video (yellow color) connector on your DVD player to the Video (yellow color) connector in the AV group.

3. Connect the R (red color) and L (white color) audio connectors on your DVD player to the corresponding R (red color) and L (white color) audio input connectors in the AV group.

4. Turn on the TV and DVD Player.

5. Select AV using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the VIDEO button on the Remote Control.

Connecting Your VCR or Video Camera

1. Turn off the TV and VCR or Video Camera.

2. Connect the S-Video jack on the rear of your VCR or Video Camera to the S-Video jack in the AV group on the rear of the TV.

3. Connect an audio cable (white and red connectors) cable to the audio output connectors associated with the S-Video output on your VCR or Video Camera and connect the other end to the audio connectors associated with the AV input on the rear of the TV.

4. Turn on the TV and VCR or Video Camera.

5. Select AV-2 using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the VIDEO button on the Remote Control.

Connecting to a PC

1. Turn off the TV and PC.

2. Connect a 15-pin D-Sub RGB (VGA) cable to the RGB output of your PC and the other end to the VGA input at the rear of the TV.

3. Connect the Audio Out on your computer to the AUDIO input at the rear of the TV.

4. Turn on the TV and PC.

5. Select VGA using the SOURCE button on the Remote control or the INPUT keypad on the side of the TV or directly by pressing the HDMI/PC button on the Remote.

2.4 Front Panel Control Knobs

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 5V

2 Green Video 10 Sync Ground

3 Blue Video 11 Not Used

4 Not Used 12 Serial Data for DDC

5 Ground 13 H-Sync.

6 Red Video Ground 14 V-Sync.

7 Green Video Ground 15 Serial Clock for DDC

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 Reserved (N.C. on Device)

15 SCL 16 SDA

17 DDC/CEC Ground 18 +5V Power

19 Hot Plug Detect

3.3 AV/S-Video/Component Video Inputs

AV (Composite Video Input)

Video1

Amplitude 1.0 Vpp (including sync)

Impedance 75 ohm terminated

S-Video (Y / C Input)

S-Video2

Video System NTSC/PAL

Y signal amplitude 1.0Vpp (including sync)

C signal amplitude 0.286Vpp

Impedance 75 ohm terminated

Component (Y, Pb/Cb, Pr/Cr Input)

Video3

DTV 480i, 480p, 720p, 1080i

Y signal amplitude 1.0Vpp (including sync )

Impedance 75 ohm terminated

Video System NTSC/PAL

Video system NTSC/PAL

Pr,(R-Y) / Pb,(B-Y) signal

amplitude

0.7Vpp

3.4 Compatible Mode Table

Dots ×

Lines

720 × 400

640 × 480

800 x 600

1024 x 768

1360 x 768

Vertical Horizontal Sync Polarity Presence Screen Mode

Frequency Frequency Horizontal Vertical Horizontal Vertical Normal Full

(Hz) (KHz) (4:3) (16:9)

70.1 31.5 NEG POS YES YES YES YES

59.9 31.5 NEG NEG YES YES YES YES

60 37.9 POS POS YES YES YES YES

60 48.363 NEG NEG YES YES YES YES

59.79 47.72 NEG POS YES YES YES YES

4. Mechanical Instructions

1. Remove the screws to remove the stand base and rear cover.

2. Release connectors.

3. Remove the screws to remove main board, power board and bracket.

4. Remove the screws to remove speaker, inverter board and bracket.

5. Remove the panel.

6. Remove key board and IR board.

5. Repair Flow Chart

1. No Power (No LED Indicator)

Check power cord and board interface

Plug in power cord and interface

Check F901, BD901, C920

Check D931, D932

Check T901

Check D950, C953, C954

2. Can not Start (LED Indicator Yellow)

Can not start

Replace F901 or BD901 or C920

Replace D931 or D932

Replace T901

Replace D950 or C953 or C954

Check key board or remote control

Check U700,U702,U703,U705,U707

Check U400

Check I2C communication

Replace U400

Repair key board or remote control

Replace U700,U702,U703,U705,U707

3. No Display (LED Indicator Green)

Check back light is OK

Check LVDS cable

and connector

Check U400

Check Panel

Replace U400

Check 12V

power supply

Check BL-ON/OFF signal

Replace Panel

Check Q707, Q708

Check PS

signal

Replace Q707, Q708

Check power

board

4. Abnormal Display

Check the source

Reset source

Check signal filter circuit

Check input signal

V, S-video, Comp，PC，HDMI signal

Check U400

Check LVDS cable

Check panel

Replace U400

Replace the filter or inductance

TV signal Check TV system setup

Check TU100

Replace LVDS cable

Replace panel

Replace TU100

5. No Sound

Check the source

Reset source

Check signal filter circuit

Check Earphone jack

Check input signal

Check U400

Check U600, U601, U603

Check speaker

Replace the Earphone jack

SIF signal Check TV system setu

Replace U400

Replace speaker

Replace the filter or inductance

Check TU100

Replace U600, U601 or U603

Replace TU100

6. Key Board

OSD is unstable or not working

Is Key Pad Board connecting normally?

Is Button Switch normally?

Is Key Pad Board Normally?

Check Main Board

Connect Key Pad Board

Replace Button Switch

Replace Key Pad Board

6. PCB Layout

6.1 Main Board

715G3364M01000004K

6.2 Power Board

715G3332 1

6.3 Inverter Board

715G3333 1

715G3690P01000003M

+ 72 hidden pages