AOC LE22H138 Service Manual

21.5" & 24" LCD TV
Service
Service
Service
Description
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.......................................20
4. Mechanical Instructions.........................................22
5. Repair Flow Chart ..............................................28
6. PCB Layout .......................................................35
6.1 Main Board.......................................................35
6.2 Power Board.....................................................37
6.3 Led Board........................................................43
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
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

SAFETY NOTICE
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Page Description
6.4 Key Board.....................................................43
6.5 IR Board.......................................................43
7. Adjustment..............................................................44
7.1 ADC Adjustment............................................44
7.2 FW Upgrade.................................................45
7.3 The Writing VGA & HDMI EDID.........................52
8. Block Diagram........................................................57
9. Schematic Diagram..........................................59
9.1 Main Board....................................................59
9.2 Power Board..................................................68
9.3 Led Board.....................................................70
9.4 Key Board.....................................................71
9.5 IR Board........................................................72
10. Exploded View..............................................73
11. BOM List......................................................77
1
AOC LE22/24H138
Horizontal Frequency
31~68 KHz
Page