Haier LET32/40T900 Service Manual

31.5"&40" 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...............................................6
2.3 Front Panel Control Knobs..................................33
2.4 How to Connect................................................36
3. Input/Output Specification.......................................40
4. Mechanical Instructions.........................................42
5. Repair Flow Chart .............................................49
6. PCB Layout ......................................................56
6.1 Main Board.......................................................56
6.2 Power Board.....................................................58
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
6.3 LED Board.....................................................67
6.4 Key Board.....................................................67
6.5 IR Board.......................................................67
7. Adjustment.....................................................68
7.1 ADC Adjustment............................................68
7.2 FW Upgrade.................................................69
8. Block Diagram........................................................72
9. Wiring Diagram......................................................74
10. Schematic Diagram........................................76
10.1 Main Board..................................................76
10.2 Power Board.................................................90
10.3 LED Board.................................................103
10.4 Key Board...............................................104
10.5 IR Board...................................................105

SAFETY NOTICE

1
Haier LET32/40T900
Horizontal Frequency
31~67 KHz
Page