AOC LE22H037

18.5″&21.5″&23.6″LCD TV AOC LE19W037&LE22(24)H037
1
Service
Service
Service
Horizontal Frequency
31~60 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………………..…….…….………......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
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

AOC LE22H037 Specifications

General

Screen Size	22 inches
Display Type	LCD
Aspect Ratio	16:9
Brightness	250 cd/m²
Contrast Ratio	1000:1
Response Time	5 ms
HDMI Ports	1
USB Ports	1
Weight	3.5 kg
Backlight Type	LED
Viewing Angle	170°/160°
Resolution	1920 x 1080
Input Ports	Composite

Summary

Safety Notices

Important Safety Notice

Provides critical precautions for service personnel regarding high voltage and equipment safety.

Revision List

General Specification

Operating Instructions

Use of Remote Control

Explains how to use the buttons and functions of the TV remote control.

Using the On-Screen Menus

Details how to navigate and utilize the TV's on-screen menu system for settings.

Connection Guide

Provides instructions on connecting various external video and audio sources to the TV.

Front Panel Controls

Describes the function of buttons and ports located on the front of the TV unit.

InputOutput Specifications

RGB Signal Input

Details the pin assignments and specifications for RGB signal input (VGA).

HDMI Connector Pin Assignments

Lists the pin assignments for the HDMI digital connector for data transfer.

Compatible Display Modes

Lists the supported PC and video resolutions, refresh rates, and timings.

Mechanical Instructions

Repair Troubleshooting Flowcharts

Troubleshooting: No Power

Flowchart for diagnosing and resolving issues when the TV does not receive power.

Troubleshooting: No Power On

Flowchart for diagnosing and resolving issues when the TV does not turn on.

Troubleshooting: Abnormal Picture

Flowchart for diagnosing and resolving problems related to abnormal video display.

Troubleshooting: No Image

Flowchart for diagnosing and resolving issues when the screen displays no image.

Troubleshooting: Audio Problems

Flowchart for diagnosing and resolving issues related to sound output or quality.

Troubleshooting: Remote Control Malfunction

Flowchart for diagnosing and resolving problems with the remote control's operation.

Troubleshooting: OSD Instability

Flowchart for diagnosing and resolving problems with the on-screen display (OSD) functionality.

PCB Layouts

Main Board Layout

Diagram showing the component placement and layout for the main circuit board.

Power Board Layout

Diagram showing the component placement and layout for the power supply board.

LED Board Layout

Diagram showing the component placement and layout for the LED backlight board.

Key Board Layout

Diagram showing the component placement and layout for the button control board.

IR Board Layout

Diagram showing the component placement and layout for the infrared receiver board.

Adjustment Procedures

System Block Diagram

Schematic Diagrams

Main Board Schematic

Detailed circuit diagram for the main processing and control board.

Power Board Schematic

Detailed circuit diagram for the power supply unit.

LED Board Schematic

Circuit diagram for the LED backlight control board.

Key Board Schematic

Circuit diagram for the button control board on the front panel.

IR Board Schematic

Circuit diagram for the infrared receiver board.

Exploded View

Bill of Materials (BOM)