AOC L32W931, L32W931P SERVICE MANUAL

32″LCD TV AOC L32W931(P)

Service

Horizontal Frequency

31.5~48 KHz

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………………..…….…….……….....30

6.3 Inverter Board……………..…….…….……….......35

6.4 Key Board………………………..……..………......39

6.5 IR Board………………………….……..………......39

7.Adjustment……..…………………………................40

8.Block Diagram.……...............................................41

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

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

9.2 Power Board…………..….….……...…………......53

9.3 Inverter Board…………..….……...…………........56

9.4 Key Board……………….……….……………........60

9.5 IR Board……...………….……….…………….......61

10.Exploded View…………………………………..….. 62

11.BOM List……………….………………….………...63

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…….………….………....14

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

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

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

6.PCB Layout ………………..…………………....….......28

6.1 Main Board…………..………………...…….………...28

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

Note: Check updating contents, please input keywords in the “Find box” of PDF and click “OK”. After that, it will automatically locate to the updating contents.

Version

Release

Date

Revision Instructions Customer Model TPV Model

A00 Nov.-18-2009 Initial Release L32W931

E329MANS4WACNN

E329MANS4WAENN

A01 Jun.13,2010 Add power board L32W931

E329AANS4WE7NN

E329AANS4WE6NN

A02 Oct.12,2010

Add the new model

L32W931P E329MANC4WA4NN

A03 Jan.20,2011

Add new models, lead in the new power board[PCB P/N: 715G3770P03W30003S] Update as below: PCB Layout Schematic BOM

L32W931

E329GANS4WAENN

E329GANS4WACNN

1. General Specification

2. Operating Instructions

2.1 The Use of Remote Control

2.2 To Use the Menus

2.3 How to Connect

2.4 Front Panel Control Knobs

1. HDMI – Conecte la fuente primaria para vídeo digital tal como un reproductor multimedia de DVD. La tira de color negro en la parte trasera de la TV indica esta conexión.

2. PC/VGA IN (ENTRADA PC/VGA) – Conecte aquí los cables de audio y video de una computadora.

3. ENTRADA DE AV (AV/S-VIDEO) – Conecte la fuente primaria para dispositivos de video compuesto tales como una videograbadora o una consola de videojuegos. Utilice los conectores blanco y rojo para conectar el audio externo desde la misma fuente. El señal que está siendo llevado por el cable de Vídeo-S y el conector, y el Vídeo RCA es el Conector Amarillo.

4. VIDEO COMPONENTE (Y/Pb/Pr con audio L/R) – Conecte aquí la fuente primaria para dispositivos de video componente como un reproductor de DVD o un decodificador. De izquierda a derecha, utilice rojo para la entrada Pr, azul para la entrada Pb, verde para la entrada Y, rojo para la entrada de audio derecho (R) y blanco para la entrada de audio izquierdo (L).

5. TV IN (ENTRADA DE TV) – Conecte a un cable RF para TV.

6. AV O U T ( S A LIDA AV) – Conecte la SALIDA AV Y ENTRADA AV de la otra TV, el señal de modo TV será mostrado en la otra TV.

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 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

3.4 Compatible Mode Table

Dots ×

Lines

Vertical Horizontal Sync Polarity Presence Screen Mode

Frequency Frequency Horizontal Vertical Horizontal Vertical Normal Full

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

720 × 400

70.1 31.5 NEG POS YES YES YES YES

640 × 480

59.9 31.5 NEG NEG YES YES YES YES

800 x 600

60 37.9 POS POS YES YES YES YES

1024 x 768

60 48.363 NEG NEG YES YES YES YES

1360 x 768

59.79 47.72 NEG POS YES YES YES YES

AV (Composite Video Input) Video1

Video System NTSC/PAL 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

Video system NTSC/PAL DTV 480i, 480p, 720p, 1080i Y signal amplitude 1.0Vpp (including sync )

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

amplitude

0.7Vpp

Impedance 75 ohm terminated

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. Sin Energía

Sin Energía (LED “Apagado”)

Revise la entrada AC. ¿La energía está en “encendida”?

Enciéndalo

Revise IR board y LED

Reemplace IR board

Reemplace main board

Salida Power board =6V?

Reemplace power board

2. No Enciende

Revise si el receptor IR es normal

(Chequee tecla power del control remoto, si

equipo no responde significa que es anormal).

No inicia (LED naranjo)

Reemplace main board

Reemplace la Power board

Reemplace power board

Reemplace key board

Reemplace IR board

Salida Power board＝12V/24V？

Revise si el botón de power funciona

3. Imagen Anormal

Imagen Anormal

Reinicie la fuente

Revise la fuente

Revise el panel

Reemplace main board

Reemplace LVDS cable

Reemplace panel

Revise main board

Entre al menú modo de fábrica para hacer

“EEPROM initial”&“Reset”

Revise el cable LVDS

4. Sin Imagen

Revise señal L/P si

está disponible

Reemplace main board

Reemplace power board

Panel Vcc = 12V?

Reemplace the Panel

Sin imagen (LED verde)

Reemplace main board

Revise si la luz del panel está

encendida= “On”

Revise cable LVDS

Vuelva a insertar o Reemplace el cable LVDS

Reemplace main board

Reemplace Panel

Salida de Power board＝12V/24 V？

Revise si el TV funciona, si enciende/apaga vía control remoto y botón de power.

5. Problema de Sonido

Sin sonido o sonido anormal

Revise si TV está mudo (muted), ajuste el volume o

entre al modo menú para reinicio?

Vuelva a insertar el cable de audio o cambie la norma del TV

Reemplace cable

Reemplace parlante

Reemplace main board

Revise el cable entre los parlantes y main

board si están OK

Revise los valores de Resistencia en el parlante que se encuentran en las especificaciones (Nota: El valor está marcado en el parlante)

Revise la conexión de la fuente de audio y si norma de

TV es correcto (NTSC-PAL N/M/ISTB)

Entre al modo menú de fábrica para reinicar

6. Control Remoto - mal funcionamiento

Control remoto - mal funcionamiento

Reemplace batería

Reemplace el control remoto

¿Es anormal la IR board?

Reemplace IR board

Reemplace main board

Use otros controles remotos, ¿funciona?

Revise la batería del control remoto si está bien colocada o no tiene energía

7. OSD es inestable o no trabaja de forma normal

La botonera está conectada correctamente?

Reconecte el key board

Los botones están OK?

Reemplace la función del botón

Botonera está OK?

Reemplace la botonera

Reemplace el main board

OSD es inestable o no trabaja normalmente

Entre al modo menú de fábrica para reinicar

6. PCB Layout

6.1 Main Board

715G3364M01000004K

6.2 Power Board

E329MANS4WACNN 715G3332 1

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