Norcent Norcent LT2725, Service Manual, Page: 1 / 123

27’’ LCD TV Color Monitor Norcent LT2725
1
Service
Service
Service
Horizontal Frequency
31- 60 KHz
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
7.1 Main Board………….....……………………....….......27
7.2 Power Board………..….…………………….....….......29
7.3 Audio Board…………..…..........................…….........31
7.4 Key Board.......………..…...…...................................32
8. Block Diagram..…….…....................….......................33
8.1 Main Board.............………..……...............................33
8.2 Power Board….............……...….…..........................34
9. Schematic Diagram...……....….………………….......35
9.1 Main Board……...…..……..…………......................35
9.2 Power Board...…….….……….……………………...53
9.3 Audio Board...………………………..………………..54
9.4 Key Board......…...............…………........................55
9.5 IR Board...…….........………..…..............................56
9.6 Side Board……………………....…………………….57
10. Exploded View……...................................................58
11. BOM List……………….……………...……….…........59
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...………........................…............12
3. Input/Output Specification............……………............15
3.1 Input Signal Connector............………….................15
3.2 Factory Preset Display Modes........………...............16
4. Mechanical Instructions..………....……......................17
5. Repair Flow Chart…….……………………..................22
6. White Balance, Luminance Adjustment…...……….....25
7. PCB Layout………….....…………………...….…….....27