AOC LE24H168 Schematic

24″ LCD TV AOC LE24H168

Service

31~68 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 Menus….....………………….…..…….......7

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

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

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

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

5. Repair Flow Chart ……………………….…….…….....26

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

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

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

SAFETY NOTICE

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

6.3 LED Board……...………………..……..……….......38

6.4 Key Board…………….………….……..……….......38

6.5 IR Board………………………….……..……….......38

7. Adjustment..............................................................39

7.1 ADC Adjustment……………………..……...………39

7.2 FW Upgrade.………………………………...………40

8. Block Diagram.…….................................................44

9. Schematic Diagram…..…………....………………...45

9.1 Main Board…………………………………...….......45

9.2 Power Board…………..….….……...………….......57

9.3 LED Board…...………….……….…………….........59

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

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

10. Exploded View………………………………….…...62

11. BOM List……………….………………….………….64

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

A00 Oct.28,2011 Initial release E24BAZNSAEACNNX

1. General Specification

Modelo LE24H168 Tamaño del panel Resolución

Sistema de TV

Cobertura de canales

Altavoz Impedancia de Antena Fuente de alimentación

Consumo de Energía en Modo Suspendido

Terminales de Video/Audio

Entrada de Video/Audio

Entrada de Componentes

Terminales HDMI

Terminales VGA

Auriculares Salida SPDIF

Tamaño (Ancho x Alto x Profundidad) (con base y soporte) (mm) Tamaño (Ancho x Alto x Profundidad) (sin base y soporte) (mm)

Peso Tamaño del Accesorio de

montaje Accesorios de montaje EEquipo: Temperatura de

Funcionamiento Temperatura de Almacenamiento

Nota:

• Los diseños y las especificaciones están sujetos a cambios sin aviso previo.

• Este modelo podría no ser compatible con funciones y/o especificaciones que se introduzcan en el futuro.

609,7 mm diagonal (24” visibles) 1920 x 1080

NTSC estándar ATSC estándar (8-VSB, Clear-QAM) VHF: 2 a través de 13 UHF: 14 a través de 69 Cable TV: Banda templada (A – 8 a través de A - 1, A a través de I) Super banda (J a través de W) Hiper banda (AA a través de ZZ, AAA, BBB) Ultra banda (65 a través de 94, 100 a través de 125)

3 W x 2 75Ω 100-240V 50/60Hz, 45W

<1W

A/V lateral x1: entrada de audio/video VIDEO: 1 V(p-p), 75 ohm, sinc negativo.

AUDIO: 500mv (rms) Componente trasero x1: Y: 1V (p-p), 75 ohm, incluido sinc. Pr/Cr: ±0.35V (p-p), 75 ohm Pb/Cb: ±0.35V (p-p), 75 ohm AUDIO: 500mv (rms) ENTRADA HDMI: HDMI Trasera x1; Lateral HDMI x1 Conforme a HDCP Conforme a E-EDID

ENTRADA VGA: VGA trasero (D-SUB 15 Pin) Entrada x1 Conforme a E-EDID Entrada de Audio: Mini-toma para estéreo (3,5Ø)

Salida de Audio: Mini-toma para estéreo (3,5Ø) Toma de Salida de Audio Óptica Digital.

584,36 x 381,39 x 125,69

584,36 x 371,62 x 37,7

5,53 Kg (con soporte) / 4,42 Kg (con soporte y base)

75 x 75mm (el kit de montaje a la pared no está incluido)

Los accesorios opcionales no están incluidos en el empaquetado estándar

35 ºC para climas moderados (temperatura ambiente máxima) -20 ºC~50 ºC

2. Operating Instructions

2.1 The Use of Remote Control

* Sonido Multicanal de Televisión (en inglés, Multichannel Television Sound (MTS) La emisión estándar permite que los sonidos estéreo se transmitan con la imagen de TV.

** Segundo Programa de Audio (en ingles, Second Audio Program (SAP)

Un canal de audio adicional proporcionado por la emisión estándar de MTS. Una pista de sonido monofónico incluida en la grabación o señal de video (normalmente contiene la traducción a un segundo idioma del programa visualizado)

*** Sleep Puede establecer un período de tiempo para que el televisor de apague automáticamente.

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 SDA(Remote Control) 4 SCL(Remote Control) 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+ 11 TMDS Clock Shield 12 TMDS Clock13 CEC 14 NC 15 SCL 16 SDA 17 DDC/CEC Ground 18 +5V Power 19 Hot Plug Detect

3.3 Compatible Mode Table

Analog RGB Input Signal

Horizontal Vertical

Resolution

640x480@60Hz 31.469 - 59.940 - 25.175 720x400@70Hz 31.469 - 70.087 + 28.322

800x600@60Hz 37.879 + 60.317 + 40.000 1024x768@60Hz 48.363 - 60.004 - 65.000 1280x720@60Hz 44.772 - 59.855 + 74.500 1280x768@60Hz 47.396 - 59.995 + 68.250

1280x1024@60Hz 63.981 + 60.020 + 108.000

1440x900@60Hz 55.469 + 59.901 - 88.750

1680x1050@60Hz 65.290 - 59.954 + 146.250 1920x1080@60Hz 67.500 + 60.000 + 148.500

Nominal

Frequency(KHz)

Sync

Polarity

Nominal

Freq. (Hz)

Sync

Polarity

Nominal Pixel

Clock (MHz)

HDMI Input Signal

Horizontal Vertical

Nominal

Mode Resolution Total

VGA 640x480@60Hz 800x525 31.469 N 59.940 N 25.175 DOS 720x400@70Hz 900x449 31.469 N 70.087 P 28.322

SVGA 800x600@60Hz 1056x628 37.879 P 60.317 P 40.000

XGA 1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000

WXGA 1280x768@60Hz 1312x800 47.396 P 59.995 N 68.250

CVT-0.92M 1280x720@60Hz 1664x748 44.772 N 59.855 P 74.500

SXGA 1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000

WXGA+ 1440x900@60Hz 1600x926 55.469 P 59.901 N 88.750

WSXGA+ 1680x1050@60Hz 2240x1089 65.290 N 59.954 P 146.250

FHD 1920x1080@60Hz 2200x1125 67.500 P 60.000 P 148.500

480i 720x480i 15.75 60 13.513 480P 720x480P 31.50 60 27.027 720P 1280x720P 45.00 60 74.25

1080i 1920x1080i 33.75 60 74.25 1080P 1920x1080P 67.5 60 148.5 1080P 1920x1080P 27 24 74.25

Frequency

(KHz)

Sync

Polarity

Nominal

Freq.

(Hz)

Sync

Polarity

Nominal

Clock

(MHz)

Pixel

4. Mechanical Instructions

1. Remove the screws to remove STAND and BASE.

2. Remove the screws to remove REAR COVER.

3. Remove the screws to remove AC COVER and SPEAKERS.

4. Remove the screws to remove MAIN BOARD and POWER BOARD.

5. Remove the screws to remove IR BOARD and LED BOARD.

6. Remove the screws to remove MAIN_FRAME and separate the PANEL and BEZEL.

8. The BEZEL.

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