Norcent LT2790BK, Service Manual

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27’’ LCD TV Norcent LT2790BK
1
Service
Service
Service
显示桌面 .scf
Horizontal Frequency
31- 60KHz
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.
7.1 Main Board……...……………………....….......25
7.2 Power Board………………………….....….......27
7.3. Key Board….…......………….................…….........29
7.4 IR Board...……………...…..................................29
8. Block Diagram..……..............….......................30
8.1 Main Board......……….………...............................30
8.2 Power Board…...……...….…..........................31
9. Schematic Diagram...………….………..………….......32
9.1 Main Board……...…..……..………......................32
9.2 Power Board...……………….……………………...49
9.3 Audio Board………..……………..………………..50
9.4 Side Board …………………………………………..51
9.5 IR Board………….………………………………..52
10. Exploded View……...................................................53
11.BOM List………………………….....……….……….....54
Table Of Contents.......…….…..............................…........1
Revision List.…….….....................................……......2
Important Safety Notice.……..................……......3
1. Monitor Specification..…............................………........4
2. Operating Instructions……...……………….……….......5
2.1 The Use Of Remote Control..………….…..................5
2.2 Front Panel Control Knobs..............….......…...........6
2.3 OSD Operating…………….…............……...............7
2.4 How To Connect...………........................…............14
3. Input/Output Specification............……………............16
3.1 Input Signal Connector............………….................16
3.2 Factory Preset Display Modes........………...............17
4. Mechanical Instructions..………....……......................18
5. Repair Flow Chart…….……………………..................21
6. White Balance, Luminance Adjustment………….....23
7.PCB Layout……..…………………....….…….....25
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING