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TFT-LCD MONITOR
GH17LS
GH17ES
Manual
SERVICE
TFT-LCD MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignments & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams
11. Panel Description
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Samsung Electronics Co.,Ltd. 416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do, Korea. Printed in Korea P/N : BN68-00225C-00 http://www.samsungmonitor.com (SyncMaster Worldwide) http://www.samsung-monitor.com (SyncMaster USA) http://www.sec.co.kr/monitor (Korea)
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Copyright Trademarks © 2001 by Samsung Electronics Co., Ltd. Samsung is the registered trademark of Samsung Electronics Co., Ltd. All rights reserved. GH17LS/GH17ES and MacMaster Cable Adapter This manual may not, in whole or in part, be are trademarks of Samsung Electronics Co., Ltd. copied, photocopied, reproduced, translated, or converted to any electronic or machine readable Macintosh, Centris, Quadra, Duo Douk, and form without prior written permission of Power Macintosh are trademarks o
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1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings 1. For continued safety, do not attempt to modify the (READING SHOULD NOT BE ABOVE 0.5mA) circuit board. 2. Disconnect the AC power and DC power jack LEAKAGE before servicing. DEVICE CURRENT UNDER TESTER TEST 1-1-2 Servicing the LCD Monitor TEST ALL EXPOSED METAL SURFACES 1. When servicing the LCD Monitor,
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1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. 1-2-1 General Servicing Precautions 1. Always unplug the unit’s AC power cord fr
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2 Product Specifications 2-1 Specifications Description Item GH17LS GH17ES LCD Panel TFT-LCD panel, RGB vertical stripe, normally black transmissive, 17-Inch viewable, 0.264 (H) x 0.264 (V) mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 81 kHz (Automatic) Vertical : 56 Hz ~ 85 Hz (~XGA), 76 Hz (SXGA); GH17ES Vertical : 56 Hz ~ 76 Hz; GH17LS Display Colors 16,7 Million colors Maximum Resolution Horizontal : 1280 Pixels Vertical : 1024 Pixels Input Video Signal Analog, 0.714 Vp-p ± 5
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2 Product Specifications 2-2 Pin Assignments Sync 15-Pin D-Sub Signal Cable Connector Type Separate Composite Sync-on-green Pin No. 1 Red Red Red 2 Green Green Green + H/V Sync. 3 Blue Blue Blue 4 GND GND GND 5 DDC Return (GND) DDC Return (GND) DDC Return (GND) 6 GND-R GND-R GND-R 7 GND-G GND-G GND-G 8 GND-B GND-B GND-B 9 DDC Power Input (+5V) DDC Power Input (+5V) DDC Power Input (+5V) 10 Self Raster Self Raster Self Raster 11 GND GND GND 12 Bi-Dr Data (SDA) Bi-Dr Data (SDA) Bi-Dr Data (SDA) 13
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2 Product Specifications 2-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. Table 2-1. Timing Chart Mode IBM VESA VGA2/ VGA3/ 640/75 Hz 640/85 Hz 800/75 Hz 800/85 Hz 1024/60Hz 1024/75Hz 1024/85Hz 1280/76Hz 1280/75Hz 70 Hz 60 Hz 640 x 480 640 x 480 800 x 600 800 x 600 1024 x 768 1024 x 768 1024x768 1280x1024 1280x1024 720 x 400 640 x 480 Timing (Analog Only) (Analog Only) fH (kHz) 31.469
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2 Product Specifications Memo 2-4 GH17LS/GH17ES
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3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the GH17LS/GH17ES TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions:1. Disconnect the monitor from the power source before disassembly. 2. Follow these directions carefully; never use metal instruments to pry apart the cabinet. 5. Disconnect 4 Inverter wires between the Pane
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3 Disassembly and Reassembly 3-2 Reassembly Reassembly procedures are in the reverse order of Disassembly procedures. 3-2 GH17LS/GH17ES
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4 Alignments and Adjustments This section of the service manual explains how to use the RS232 JIG. This function is needed when AD Board Change and program memory (IC110) change. 4-1 Required Equipment 4-3 Changing Board The following equipment is necessary for Before replacing the AD Board, read all Panel adjusting the monitor: information data by using RS232 JIG and hyper R R terminal. • Computer with Windows 95 , Windows 98 , R or Windows NT . 1. Type character `B`. • RS232 JIG. Servic
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4 Alignments and Adjustments Memo 4-2 GH17LS/GH17ES
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5 Troubleshooting Notes: 1. Before troubleshooting, setup the PC’s display as below. • Resolution: 1280 x 1024 • H-frequency: 64 kHz • V-frequency: 60 Hz 2. If no picture appears, make sure the power cord is correctly connected. 3. If you push and hold the EXIT button for more than 5 seconds, the monitor automatically turns back to the factory preset. 5-1-1 No Power ❇ When Pin 6 of CN105 is 0V No does proper DC 12V, 5V Change power Adaptor. appear at Pin 1, 2 and 7 of CN105 seperately? Yes No
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5 Troubleshooting 5-1-2 No Power When Pin 6 of CN105 is ❇❇ No around 2V, does proper DC 8V, Change power Adaptor. 3V appear at Pin 1 and 7 of CN105 seperately? Yes No Does proper DC 5 V appear at Check IC115 and related circuit. Pin 3 of IC115? Yes Push Power button. No Check function PCB Assy Does proper 0V at Pin 6 of and related circuit. CN105? Yes No Does proper DC 3.3 V appear at Check IC112 and related circuit. Pin 3 of IC112? Yes No Does proper DC 2.5 V appear at Check IC116, IC117 Pi
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5 Troubleshooting 5-2 No Video Check signal cable connection and power. No Replace that or Does the X101 and X201 oscillate properly? check related circuit. 1 2 Yes No There R, G, B input are at R103, R107 and R108? Check input part. Yes There sync. and data output are No Please check the power related R260, R261, R211, R213, and RA201 ~ RA212? IC202 and output part. 3 4 5 6 Yes There proper signal input are No Check IC102 and related circuit. Pin 66, 65, 64, and 11 of IC102? 5 3 4 6 Yes Does t
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5 Troubleshooting WAVEFORMS 1 2 3 4 5 6 7 5-4 GH17LS/GH17ES
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6 Exploded View and Parts List 6-1 GH17LS GH17LS/GH17ES 6-1
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6 Exploded View & Parts List 6-2 GH17ES 6-2 GH17LS/GH17ES
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7 Electrical Parts List 7-1 Main PCB Parts Loc. No. Code No. Description Specification Remarks CIS 0201-001223 ADHESIVE-TS HT-130S,RED,700+/- 50,- SNA CIS 0202-001044 SOLDER-WIRE. S63S-W3.0,S63S,D3,63Sn/37Pb,- SNA CIS 0202-001046 SOLDER-WIRE FLUX CF-110VH-2A,-,-,-,- SNA CIS 0202-001162 SOLDER-CREAM RMA-20-21L,S63,-,SN63/PB36.6/AG0.4,FLUX9.5% SNA CIS 0202-001172 SOLDER-WIRE FLUX RS-107,RS60,D1.2,SN60/PB40,- SNA CIS 0204-001095 THINNER #4520,-,-,- SNA CIS BN44-00054A ADAPTOR DPA34L,170S,100-240VA
