AOC L32DK99FU, L42DK99FU Schematic

32″_42” LCD TV AOC L32_42DK99FU

Service

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

6.2 Power Board……..……………….…….……….......35

6.3 Key Board………………………..……..……….......39

6.4 IR Board………………………….……..……….......40

7. Adjustment……..………………………….................41

8. Block Diagram.……........................................... ......42

9. Schematic Diagram…..…………....………………...43

9.1 Main Board…………………………………...….......43

9.2 Power Board…..………….….……...………….......61

9.3 Key Board……………….……….…………….........63

9.4 IR Board……...………….……….…………….........64

10. Exploded View………………………………….…...65

11. BOM List……………….………………….………….67

Table of Contents........……...................................…........1

Important Safety Notice.......................................……......2

Revision List…………………………………………………3

1. General Specification..............................……...…........4

2. Operating Instructions………………...…….……….......6

2.1 The Use of Remote Control…….…..……….…….......6

2.2 To Use the Menu….....…………………….……….......7

2.3 How to Connect……..……………….…….……….....14

2.4 Front Panel Control Knobs…….………….……….....20

3. Input/Output Specification…………....................…....21

4. Mechanical Instructions…………………….................23

5. Repair Flow Chart ……………………….…….…….....27

6. PCB Layout ………………..…………………....….......33

6.1 Main Board…………..………………...…….…….......33

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 service r who use s a service procedure or tool which is not recommended by AOC must first satisfy himself thoroughly that neither his sa fety 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 o r altered without written pe rmission 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 T O 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 P A RTS 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 d irty or rough cloth may

damage the panel.)

Revision List

Version Release Date Revision Instructions TPV Model

A00 Jun.30,2010 Initial Release

E32AA2NCWGA1NNS

A00 Jun.30,2010 Initial Release

E42AA2NCWGA1NNS

1. General Specification

Computer formats

Video formats

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 “

”, “v”, “﹤”, “﹥” and “ENTER” to move around to select, adjust or co nfirm an item in the OSD

(On Screen Display) menu. Press the MENU/EXIT button to enter the main OSD. Adjust the items including Picture Setting, Audio Setting, Feature Setting, Installation Setting. However, some function items in the menus may only be enabled in the particular source modes.

Picture Setting

The Picture Setting in TV mode shows as below.

Picture Setting ( For PC source only )

Audio Setting

Features Setting

Feature Setting (For PC source only)

Installation setting

2.3 How to Connect

Using Your Antenna or Cable for TV

Note: It is strongly recommended that you connect the antenna/cable input using a 75-ohm coaxial cable to receive optimum picture quality.

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.

NOTE

Refer to your TV Set-Top Box user manual for more information about the video output requirements of the product or consult your cable or satellite operator.

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 sid e 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.

NOTE

Refer to your DVD player user manual for more information about the video output requirements of the p roduct. The DVI to HDMI connection provides video only. Connection to an alternate audio player is required for audio output.

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) conne ctor 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.

NOTE

Refer to your DVD player user manual for more information about the video output requirements of the p roduct.

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 conne ctors a ssoci ated 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.

NOTE

Refer to your VCR or Video Camera user manual for more information about the video output requirements of the product.

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.

NOTE

For the best picture quality when connecting a computer through VGA, set your computer timi ng mode to native resolution of panel. Please refer to the PC or graphic card’s user guide for additional information on how to set the timing mode and the video output requirements of the product.

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 No Pin 2 Green Video 10 Sync Ground 3 Blue Video 11 RXD 4 TXD 12 Serial Data for DDC 5 Ground 13 H-Sync. 6 Red Ground 14 V-Sync. 7 Green Ground 15 Serial Clock for DDC 8 Blue 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+ 1 1 TMDS Cloc k Shield 12 TMDS Clock13 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

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

Video3

AV (Composite Video Input)

Video1

System PAL/ SECAM Amplitude 1Vpp (300mV-sync, 700mV-video) Impedance 75 ohm terminated

S-Video (Y / C Input)

S-Video2

System PAL/ SECAM Y signal amplitude 1VppY-signal C signal amplitude +/-300mV C-signal Impedance 75 ohm terminated

4. Mechanical Instructions

1. Remove 4 screws to take the base away.

2. Remove 4 screws to remove the neck.

3. Remove 18 screws to remove the rear cover.

4. Remove 6 screws and 4 cables to take the main board away.

5. Remove 5 screws and 1 cable to take the power away.

6. Remove 4 screws to remove the speakers

7. Remove 26 screws to take all BKT away.

8. Remove the 1 screw and 1 cable to remove the IR board.

9. Pull out the Key board

10. The panel

5. Repair Flow Chart

1. No power

No power (LED “Off”)

Check the AC input and the

ower is “ON”?

Power “On”

Check the IR board and LED

Replace the IR board

Replace the main board

Power board output=5V?

Replace the power board

Yes

2. Can’t start

Can’t start（LED red）

Replace the main boardPanel

Replace the Power board

Yes

Power board output＝24V?

Check the power key is under control?

Check the IR receiver is normal?

Replace the power board

Replace the key board

Yes

Replace the IR board

3. No display

Check the B/L signal

is available?

Replace main board

Replace the power board

Panel Vcc =12V?

Replace the Panel

No display (LED green)

Replace the main board

Check the backlight is “On”?

Check the LVDS cable

Reinsert or replace the LVDS cable

Replace the main board

Replace the Panel

Yes

Power board output＝24V?

Check TV is under control and power on/off by remote control and power key?

4. Sound problem

No sound or sound abnormal

Check the TV is muted, adjust the

volume or enter the menu to reset?

Reinsert the audio cable or change the TV system

Replace the cable

Replace the speaker

Replace the main board

Yes

Check the cable between the

speakers and main board is ok?

Check the speaker resistance value is in spec (Remark: The value is marked on the speaker)?

Check the audio source connection

and the TV system are correct？

Yes

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