Lenovo L1900P Service Manual

19" LCD Color Monitor
Service
Service
Service
Description
Table of Contents...................................................1
Revision List..........................................................2
Important Safety Notice.............................................3
1. Monitor Specification..................................................4
2. LCD Monitor Description........................................5
3. Operation Instruction...................................................6
3.1. General Instructions..................................................6
3.2. Control Button..................................................6
3.3. OSD Menu................................................................7
4. Input/Output Specification..................................10
4.1. Input Signal Connector..........................................10
4.2. Factory Preset Display Modes...............................11
4.3. Panel Specification..........................................11
5. Block Diagram.....................................................14
5.1. Software Flow Chart.........................................14
5.2. Electrical Block Diagram...........................16
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. Schematic.....................................................18
6.1. Main Board...................................................18
6.2. Power Board.................................................22
6.3. Key Board.............................................24
7. PCB Layout....................................................25
7.1. Main Board...................................................25
7.2. Power Board..................................................28
7.3. Key Board...................................................31
8. Maintainability................................................32
8.1. Equipments and Tools Requirement..............32
8.2. Trouble Shooting.......................................33
9. White-Balance, Luminance adjustment............39
10. Monitor Exploded View................................41
11. BOM List................................................42
12. Different Parts List.....................................54
SAFETY NOTICE
1
Lenovo L1900P
Horizontal Frequency
30-81 KHz
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