AOC LE22A3520/61 - User Manual

21.5″ LCD TV AOC LE22A3520/61
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Service
Service
Service
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
6.1 Main Board…………..……………...…….…….......34
6.2 Power Board……...…………..….…….……….......37
6.3 Key Board…...………………………………….......39
6.4 IR Board…...…………………………………….......39
7. Adjustment..............................................................40
8. Block Diagram.…….................................................41
9. Schematic Diagram…..…………....………………...42
9.1 Main Board…………………………………...….......42
9.2 Power Board…………..….….……...………….......54
9.3 Key Board……………….……….…………….........56
9.4 IR Board…...…………….……….…………….........57
10. Exploded View………………………………….…...58
11. BOM List……………….………………….………….60
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….....………………….…..…….......6
2.3 How to Connect……..……………….…….……….....18
2.4 Front Panel Control Knobs…….………….……….....20
3. Input/Output Specification…………....................…....23
4. Mechanical Instructions…………………….................24
5. Repair Flow Chart ……………………….…….…….....27
6. PCB Layout ………………..………………....….......34

AOC LE22A3520/61 Specifications

General

Screen Size	21.5 inches
Display Type	LCD
Backlight Type	LED
Aspect Ratio	16:9
Brightness	250 cd/m²
Response Time	5 ms
HDMI Ports	1
USB Ports	1
Weight	3.1 kg
Viewing Angle	170° (H) / 160° (V)
Resolution	1920 x 1080
Input Ports	HDMI, VGA, USB, Composite

Summary

Safety Notice

General Specification

Operating Instructions

Remote Control Usage

Detailed explanation of remote control buttons and their functions.

Menu Navigation and Settings

Guide to accessing and adjusting TV settings via the on-screen menu.

Front Panel Controls

Functionality of the physical control buttons on the TV's front panel.

Input; Output Specification

Compatible Mode Table

Supported signal resolutions and timing for analog and HDMI inputs.

Mechanical Instructions

Component Removal Steps

Instructions for removing internal components like boards, speakers, and brackets.

Repair Flow Chart

Power and Display Issues

Steps to diagnose and fix power and display related problems.

Remote and OSD Issues

Procedures for resolving remote control and OSD instability problems.

PCB Layout

Board Layout Diagrams

Layouts for the main, power, key, and IR receiver circuit boards.

Adjustment Procedures

Block Diagram

Schematic Diagrams

Main Board Schematic

Detailed electrical schematic for the TV's main processing board.

Power Board Schematic

Detailed electrical schematic for the TV's power supply board.

I;O and Interface Schematics

Schematics for AV, YPbPr, VGA, HDMI, and other interface connections.

Keypad and IR Schematics

Schematics for the TV's keypad and infrared receiver circuits.

Exploded View

BOM List