AOC LE19W037, LE22H037, LE24H037 Schematic

18.5″&21.5″&23.6″LCD TV AOC LE19W037&LE22(24)H037

Service

31~60 KHz

Description Page Description Page

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

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

Revision List………………………………………………....3

1. General Specification..............................……...….......5

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

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

2.2 To Use the Menus….....………………….…..…….......7

2.3 How to Connect……..……………….…….……….....17

2.4 Front Panel Control Knobs…….………….……….....19

3. Input/Output Specification…………....................…....20

4. Mechanical Instructions…………………….................22

5. Repair Flow Chart ……………………….…….…….....25

6. PCB Layout ………………..…………………....….......32

6.1 Main Board…………..………………...…….…….......32

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

Horizontal Frequency

TABLE OF CONTENTS

6.2 Power Board………………..…….…….………......34

6.3 LED Board……...…………..…….…….………......44

6.4 Key Board………………………..……..……….......45

6.5 IR Board………………………….……..……….......45

7. Adjustment……..………………………….................46

8. Block Diagram.……...............................................47

9. Schematic Diagram…..…………....………………...49

9.1 Main Board…………………………………...…......49

9.2 Power Board…………..….….……...………….......58

9.3 LED Board………….……..….……...………….......66

9.4 Key Board……………….……….…………….........68

9.5 IR Board……...………….……….…………….........69

10. Exploded View……………………………….…....70

11. BOM List……..……….………………….…………..74

SAFETY NOTICE

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.)

Version Release Date Revision Instructions

A00 Jun.7,2010 Initial Release

Add new Model LE19W037 E19AAANSWEB16N

A01 Aug.12,2010

Add new power board LE22H037 E22AGANSWEB16N

Add new Models LE19W037

Revision List

Customer

Model

LE19W037

LE22H037

LE24H037

TPV Model

E19A2ANSWEE7NN

E19A2ANSWEE6NN

E22A2ANSWEE6NN

E22A2ANSWEE7NN

E2CA6ANSWEE7NN

E2CA6ANSWEE6NN

E19A7ANSWEE6NN

E19A7ANSWEE7NN

Add new power board

A02 Dec.07,2010

A03 Jan.18,2011 Add new Models LE24H037

A04 May.13,2011

A05 Aug.31,2011

715G4147P01H21002S& 715G3798T02000004S Update are as below:

Layout Schematic Diagram BOM List

Add new LED board 715G4614T01000004S Update are as below:

PCB Layout Schematic Diagram BOM List

Add new power&LED board 715G4147P01H21002S& 715G3798T02000004S& 715G4614T01000004S Update are as below:

Repair Flow Chart PCB Layout Schematic Diagram BOM List

Add new inverter board 715G3798T02000004S Update are as below: BOM List

LE22H037

LE19W037

LE22H037

LE24H037 E2CA6ANSWEE9NN

LE19W037

E22A7ANSWEE6NN

E22A7ANSWEE7NN

E2CA6ANSWEACNN

E2CA6ANSWEAENN

E19A2ANSWEAENN

E19A2ANSWEACNN

E19A2ANSWEE9NN

E22A2ANSWEAENN

E22A2ANSWEACNN

E22A2ANSWEE9NN

E19A7ANSWEE65N

Add new Model E19A2ANSWEAE5N

E19B2ANSWEE8NN

Add new Models LE19W037

A05 Aug.31,2011

A06 Oct.8,2011 Add new Model LE19W037 E19B2ANKWEM55N

A07 Dec.5,2011 Add new Model LE24H037 E2CA6ANSWEE8NN

Add new Models LE22H037

Add new power board 715G4313P02000003 Update are as below:

Repair Flow Chart PCB Layout Schematic Diagram BOM List

LE24H037

E19B2ANSWEE7NN

E19B2ANSWEE9NN

E22B2ANSWEE8NN

E22B2ANSWEE7NN

E22B2ANSWEE9NN

E2CB6ANSWEE7NN

E2CB6ANSWEE8NN

E2CB6ANSWEE9NN

1. General Specification

* Entrada de S-Video Puede conectar la TV a una fuente de video de alta resolución (grabadora de videocasete Super VHS, reproductor de discos láser y sistema de entretenimiento hogareño con DVD) para obtener una máxima satisfacción de visualización. Nota: _ Los diseños y las especificaciones están sujetos a cambios sin aviso previo. _ Este modelo podría ser no compatible con las funciones y/o especificaciones que se agreguen en el futuro.

2. Operating Instructions

2.1 The Use of Remote Control

2.2 To Use the Menus

8 9

10 11 12 13 14 15 16

2.3 How to Connect

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 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 Compatible Mode Table

Modo de PC preestablecido (LE19W037)

Estándar Resolución Horizontal (kHz) Vertical (Hz)

VESA 640 x 480 31.469 59.94 VESA 800 x 600 35.156 56.250 VESA 800 x 600 37.879 60.317 VESA 1024 x 768 48.363 60.004 VESA 1280 x 720 60.000 45.000 VESA 1360 x 768 47.72 59.799

Modo de PC preestablecido (LE22H037/LE24H037)

Estándar Resolución Horizontal (KHz) Vertical (Hz)

VESA 640 x 480 31.469 59.94

VESA 800 x 600 35.156 56.250

VESA 800 x 600 37.879 60.317

VESA 1024 x 768 48.363 60.004

VESA 1280 x 720 60.000 45.000

VESA 1360 x 768 47.72 59.799

WXGA+ 1400 x 900 59.887 55.935

WSXGA 1680 x 1050 59.884 64.674

FHD 1920 x 1080 60 67.5

Modo de video preestablecido (LE19W037)

Estándar Resolución Horizontal (KHz) Vertical (Hz)

SD 480i 15.734 60 SD 480P 31.5 60 HD 720P 45 60 HD 1080i 33.75 60

Modo de video preestablecido (LE22H037/LE24H037)

Estándar Resolución Horizontal (KHz) Vertical (Hz)

SD 480i 15.734 60

SD 480P 31.5 60

HD 720P 45 60

HD 1080i 33.75 60

FHD 1080p 67.5 60

4. Mechanical Instructions

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

2. Remove the screws to remove AC cover.

3. Remove the screws to remove hinge BKT.

4. Remove the screws to remove AC BKT, main board and power board.

5. Remove the screws to remove key board, IR board and speakers.

6. The panel.

5. Repair Flow Chart

1. Sin Energía

Sin Energía (LED “Apagado”)

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

Salida Power board =5.2V?

Revise IR board y LED

Reemplace IR board

Enciéndalo

Reemplace power board

Reemplace main board

2. No Enciende

(Chequee tecla power del control remoto, si

equipo no responde significa que es anormal).

No inicia (LED naranjo)

Salida Power board＝16V/12V？

Revise si el botón de power funciona

Revise si el receptor IR es normal

Reemplace power board

Reemplace key board

Reemplace IR board

Reemplace main board

Reemplace la Power board

3. Imagen Anormal

Entre al menú modo de fábrica para hacer

Imagen Anormal

Revise la fuente

“EEPROM initial”&“Reset”

Reinicie la fuente

Revise main board

Revise el cable LVDS

Revise el panel

Reemplace panel

Reemplace main board

Reemplace LVDS cable

4. Sin Imagen

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

Revise cable LVDS

Panel Vcc = 5V?

Sin imagen (LED verde)

Revise si la luz del panel está

encendida= “On”

Vuelva a insertar o Reemplace el cable LVDS

Reemplace main board

Revise señal L/P si

está disponible

Salida de Power board＝16V/12 V？

Reemplace main board

Reemplace the Panel

Reemplace main board

Reemplace Panel

Reemplace power board

5. Problema de Sonido

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

Sin sonido o sonido anormal

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

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

entre al modo menú para reinicio?

Entre al modo menú de fábrica para reinicar

Revise el cable entre los parlantes y main

board si están OK

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

Reemplace cable

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

Reemplace parlante

Reemplace main board

6. Control Remoto - mal funcionamiento

Control remoto - mal funcionamiento

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

Use otros controles remotos, ¿funciona?

Reemplace batería

Reemplace el control remoto

¿Es anormal la IR board?

Reemplace main board

Reemplace IR board

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