Haier LD42U7000, Service Manual

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42
″&50″ LCD TV Haier LD42U7000&LD50U7000
1
Service
Service
Service
Table of Contents
Description Page Description Page
Table of Contents.......……...................................….....1
Important Safety Notice....................
...................……..2
Revision List………………………………………………..3
1. General Specification.........
...........................……….....4
2. Operating Instructions..
………………….……...……..5
2.1 Remote Control…………….……...…………...……....5
2.2 OSD Menus
…………....………………….….………....6
2.3 Panel Control And Rear Terminal Control………...14
3.
Input/Output Specification………….....................….19
4.
Mechanical Instructions……………………................22
5.
Repair Flow Chart ……………………………………...25
6.
PCB Layout …………...………………………………..32
6.1 Main Board
…………...………………………………..32
6.2 Power Board……..…………………... …....….........32
6.3 IR
Board………….……………..……….….......32
6.4 KeyB
oard……..…………………...…….…........32
7. Adjustment..............................................................33
7.1 ADC/WB Adjustment..............................................33
7.2 Firmware and DDC Instruction..............................34
8. Block Diagram..
…..…..............................................35
9. Wiring Diagram....
…….............................................37
10. Schematic Diagram.
………..…….………………....37
10.1 Main Board………..…….…………………...…......37
10.2 Power Board……..…..…....…………...……….....51
10.3 IR Board………….……………..……….…............58
10.4 Key B
oard……..…………………...…….…........59
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF W ITH 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 W HEN SERVICING
R FOR TH
UNIT W HEN S
CI