AOC LE22H168 User Manual

21.5″ LCD TV AOC LE22H168
1
Service
Service
Service
Horizontal Frequency
31~68 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
6.3 LED Board……...………………..……..……….......39
6.4 Key Board…………….………….……..……….......39
6.5 IR Board………………………….……..……….......39
7. Adjustment..............................................................40
7.1 ADC Adjustment……………………..……...………40
7.2 FW Upgrade.………………………………...………41
8. Block Diagram.…….................................................45
9. Schematic Diagram…..…………....………………...46
9.1 Main Board…………………………………...….......46
9.2 Power Board…………..….….……...………….......58
9.3 LED Board…...………….……….…………….........60
9.4 Key Board……………….……….…………….........61
9.5 IR Board……...………….……….…………….........62
10. Exploded View………………………………….…...63
11. BOM List……………….………………….………….65
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 ……………………….…….…….....27
6. PCB Layout ………………..…………………....….......34
6.1 Main Board……………..……………...…….…….......34
6.2 Power Board……...……………..….…….……….......36

AOC LE22H168 Specifications

General

Brand	AOC
Model	LE22H168
Category	LCD TV
Language	English

Summary

Important Safety Notice

Revision List

General Specification

Operating Instructions

The Use of Remote Control

Explains the function of each button on the remote control for TV operation.

To Use the Menus

Instructions for navigating and using the TV's on-screen menu system.

How to Connect

Guides on connecting various external devices and antennas to the TV.

Front Panel Control Knobs

Description of the physical buttons on the TV's front panel.

Input/Output Specification

RGB Signal Input

Details of the RGB signal input connector and pin assignments.

HDMI Digital Connector Pin Assignments

Pin configuration for the HDMI digital interface connector.

Compatible Mode Table

Table listing compatible input resolutions and frequencies for analog and HDMI.

Mechanical Instructions

Repair Flow Chart

No power

Troubleshooting steps for when the TV does not power on.

Can't start

Diagnostic steps for when the TV fails to boot up.

Abnormal display

Troubleshooting for issues related to picture display problems.

No display

Steps to diagnose and fix a completely blank screen.

Sound problem

Troubleshooting guide for audio issues like no sound or distorted sound.

Remote control malfunction

Steps to identify and resolve remote control issues.

OSD is unstable or can't work normally

Diagnosing and fixing problems with the on-screen display.

PCB Layout

Main Board

Diagram showing the component layout of the main circuit board.

Power Board

Diagram illustrating the component placement on the power supply board.

LED Board

Layout diagram for the LED backlight control board.

Key Board

Component layout of the button control board.

IR Board

Diagram showing the infrared receiver board components.

Adjustment

ADC Adjustment

Procedure for adjusting the Analog-to-Digital Converter settings.

FW Upgrade

Steps for updating the TV's firmware using a USB drive.

Block Diagram

Schematic Diagram

Main Board

Detailed electrical schematic of the main circuit board.

Power Board

Electrical schematic for the TV's power supply board.

LED Board

Schematic diagram of the LED backlight driver circuit.

Key Board

Schematic for the TV's front panel button interface.

IR Board

Schematic of the infrared receiver circuit board.

Exploded View

BOM List