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LCD-Monitor
Model 920NW
SERVICE
LCD Monitor
Manual
Fashion Feature
- 19" LCD Monitor (1440x 900 ) - Response Time (5ms) - Simple Stand - Silver / Black ColorVariation
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Copyright ©2007 by Samsung Electronics Co., Ltd. All rights reserved. This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Samsung Electronics Co., Ltd. 920NW Service Manual First edition July 20067. Printed in Korea.
Trademarks Samsung is the registered trademark of Samsung Electronics Co., Ltd. 920NW and MacMaster Cable Adapter are trademarks of Samsung Electronics Co., Ltd. Macintosh, Power Macintosh are trademarks of Apple Computer, Inc. All other trademarks are the property of their respective owners.
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Contents
1. Precautions .........................................................................................................................................................1-1 1 1-1 Safety Precautions ....................................................................................................................................... 1-1 1-2 Servicing Precautions .................................................................................................................................... 1-2 1-3 Electrostatically Sensitive Devices (ESD) Precautions .......................................................................................... 1-2 1-4 Installation Precautions ................................................................................................................................. 1-3 2. Product specifications ..........................................................................................................................................2-1 2 2-1 Fashion Feature............................................................................................................................................. 2-1 2-2 Specifications ................................................................................................................................................ 2-1 2-3 Option Specification ....................................................................................................................................... 2-2 3. Alignments and Adjustments .................................................................................................................................3-1 3 3-1 Required Equipment .................................................................................................................................... 3-1
3-2 Automatic Color Adjustment ........................................................................................................................... 3-1 3-3 DDC EDID Data Input .................................................................................................................................... 3-1 3-4 How to execute DDC .................................................................................................................................... 3-2
3-5 How to execute MCU Code .............................................................................................................................. 3-3 4. Troubleshooting 4 ................................................................................................................................................4-1
4-1 Common Acknowledge ....................................................................................................................................4-1 4-2 No Power & Power LED Off ........................................................................................................................... 4-2
4-3 DC output voltage is unstable ........................................................................................................................... 4-3 4-4 Output power is unstable ................................................................................................................................. 4-4 4-5 Backlight can't be turned on ........................................................................................................................... 4-5
4-6 Black Screen and backlight turn on .................................................................................................................. 4-6 4-7 White Screen ................................................................................................................................................ 4-7 4-8 Bad Screen ................................................................................................................................................... 4-8 5. Exploded View and Parts List 5 ..............................................................................................................................5-1
6. Electrical Parts List .............................................................................................................................................6-1 6 7. Block Diagram ...................................................................................................................................................7-1 7 7-1 Power tree ...................................................................................................................................................7-1 7-2 Mainboard part .............................................................................................................................................7-2 7-3 IP Board Part(SMPS Part) ..............................................................................................................................7-2
7-4 IP BOARD part(Inverter Part) ...........................................................................................................................7-3
8 8. Wiring Diagram ...................................................................................................................................................8-1
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Contents
9. Schematic Diagrams .............................................................................................................................................9-1 9 9-1 INPUT ......................................................................................................................................................... 9-1 9-2 DCINPUT ......................................................................................................................................................9-2 9-3 SCALER ......................................................................................................................................................9-3 9-4 POWER ......................................................................................................................................................9-4 9-5 POWER ......................................................................................................................................................9-5 9-6 KEYPAD ......................................................................................................................................................9-6 10. Operating Instructions and Installation ..................................................................................................................10-1
10-1 Front ...................................................................................................................................................... 10-1 10-2 Rear .........................................................................................................................................................10-2 10-3 Monitor Assembly .......................................................................................................................................10-3 10-4 Attaching a Base .......................................................................................................................................10-4 1 11. Disassembly and Reassembly ..............................................................................................................................11-1 11-1 Disassembly Block .................................................................................................................................... 11-1 11-2 Reassembly ............................................................................................................................................. 11-4 12. PCB Diagram ...................................................................................................................................................12-1 1 13. Circuit Descriptions .............................................................................................................................................13-1 1 13-1 Overall Block Structure .............................................................................................................................. 13-1
13-2 IP BOARD part(Inverter Part) ........................................................................................................................ 13-4 14. Reference Infomation ....................................................................................................................................... 14-1 14-1 Technical Terms ....................................................................................................................................... 14-1 14-2 Connecting the monitor .................................................................................................................................14-3 14-3 Pin Assignments ..........................................................................................................................................14-4 14-4 Timing Chart .............................................................................................................................................14-5 14-5 Preset Timing Modes ................................................................................................................................. 14-6 14-6 Panel Description ....................................................................................................................................... 14-7
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-This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable International and/or domestic law.
Samsung Electronics Co.,Ltd. 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Gyeonggi-Do, Korea, 443-742 Printed in Korea P/N : BN82URL : http://itself.sec.samsung.co.kr/