Haier L42A9 Service Manual

42"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 Menu.................................................6
2.3 How to Connect................................................14
2.4 Front Panel Control Knobs..................................15
3. Input/Output Specification.......................................16
4. Mechanical Instructions.........................................18
5. Repair Flow Chart ..............................................21
6. PCB Layout .......................................................25
6.1 Main Board.......................................................25
6.2 Power Board.....................................................27
6.3 Inverter Board...................................................30
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

TABLE OF CONTENTS

Page Description
6.4 IO Board........................................................31
6.5 Key Board.....................................................32
6.6 IR Board.......................................................32
7. Adjustment..............................................................33
8. Block Diagram........................................................34
9. Wiring Diagram......................................................36
10. Schematic Diagram........................................37
10.1 Main Board..................................................37
10.2 Power Board................................................47
10.3 Inverter Board...............................................52
10.4 IO Board......................................................53
10.5 Key Board...................................................56
10.6 IR Board.....................................................57
11. Exploded View...............................................58
12. BOM List.....................................................60
SAFETY NOTICE
1
Haier L42A9
Horizontal Frequency
34~68 kHz
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