TFT-LCD MONITOR GH17LS GH17ES SERVICE Manual 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.
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.
Copyright Trademarks © 2001 by Samsung Electronics Co., Ltd. Samsung is the registered trademark of 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. GH17LS/GH17ES Service Manual First edition July 2001. GH17LS/GH17ES and MacMaster Cable Adapter are trademarks of Samsung Electronics Co., Ltd.
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 circuit board. 2. Disconnect the AC power and DC power jack before servicing. (READING SHOULD NOT BE ABOVE 0.5mA) 1-1-2 Servicing the LCD Monitor 1. When servicing the LCD Monitor, Disconnect the AC line cord from the AC outlet. 2.
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. 2. 3.
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.
2 Product Specifications 2-2 Pin Assignments Sync Type Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2-2 15-Pin D-Sub Signal Cable Connector Separate Red Green Blue GND DDC Return (GND) GND-R GND-G GND-B DDC Power Input (+5V) Self Raster GND Bi-Dr Data (SDA) H-Sync. V-Sync. DDC Clock (SCL) Composite Red Green Blue GND DDC Return (GND) GND-R GND-G GND-B DDC Power Input (+5V) Self Raster GND Bi-Dr Data (SDA) H/V-Sync. Not Used DDC Clock (SCL) Sync-on-green Red Green + H/V Sync.
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 VGA2/ 70 Hz VESA VGA3/ 60 Hz 720 x 400 640 x 480 Timing 640/75 Hz 640/85 Hz 800/75 Hz 800/85 Hz 1024/60Hz 1024/75Hz 1024/85Hz 1280/76Hz 1280/75Hz 640 x 480 640 x 480 800 x 600 800 x 600 1024 x 768 1024 x 768 1024x768 1280x1024 1280x1024 (Analog Only) (Analog Only) fH (kHz) 31.469 31.
2 Product Specifications Memo 2-4 GH17LS/GH17ES
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. 3-1-1 Removing the Stand 1.
3 Disassembly and Reassembly 3-2 Reassembly Reassembly procedures are in the reverse order of Disassembly procedures.
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 adjusting the monitor: Before replacing the AD Board, read all Panel information data by using RS232 JIG and hyper terminal. R R • Computer with Windows 95 , Windows 98 , R or Windows NT . • RS232 JIG. 1. Type character `B`.
4 Alignments and Adjustments Memo 4-2 GH17LS/GH17ES
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 does proper DC 12V, 5V appear at Pin 1, 2 and 7 of CN105 seperately? No Change power Adaptor.
5 Troubleshooting 5-1-2 No Power When Pin 6 of CN105 is ❇❇ around 2V, does proper DC 8V, 3V appear at Pin 1 and 7 of CN105 seperately? No Change power Adaptor. Yes Does proper DC 5 V appear at Pin 3 of IC115? No Check IC115 and related circuit. Yes Push Power button. Does proper 0V at Pin 6 of CN105? No Check function PCB Assy and related circuit. Yes Does proper DC 3.3 V appear at Pin 3 of IC112? No Check IC112 and related circuit. Yes Does proper DC 2.
5 Troubleshooting 5-2 No Video Check signal cable connection and power. Does the X101 and X201 oscillate properly? 1 No 2 Replace that or check related circuit. Yes There R, G, B input are at R103, R107 and R108? No Check input part. Yes There sync. and data output are R260, R261, R211, R213, and RA201 ~ RA212? 3 6 5 4 No Please check the power related IC202 and output part. Yes There proper signal input are Pin 66, 65, 64, and 11 of IC102? 5 3 4 No Check IC102 and related circuit.
5 Troubleshooting WAVEFORMS 1 2 3 4 5 6 7 5-4 GH17LS/GH17ES
6 Exploded View and Parts List 6-1 GH17LS GH17LS/GH17ES 6-1
6 Exploded View & Parts List 6-2 GH17ES 6-2 GH17LS/GH17ES
7 Electrical Parts List 7-1 Main PCB Parts Loc. No. CIS CIS CIS CIS CIS CIS CIS CIS CIS CIS CN101 CN105 CN106 CN108 IC110 BD101 BD104 BD105 BD106 BD107 BD108 C101 C102 C103 C104 C105 C106 C107 C111 C112 C113 C114 C115 C116 C117 C118 C121 C122 C123 C124 C125 C126 C127 C128 C129 C130 C131 C132 GH17LS/GH17ES Code No.
7 Electrical Parts List Loc. No. C136 C143 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C162 C163 C164 C165 C166 C168 C169 C170 C171 C172 C173 C174 C175 C176 C177 C178 C179 C180 C181 C182 C183 C184 C185 C187 C188 C189 C190 C191 C192 C193 C194 C201 C202 C207 C208 C209 C210 C211 C212 7-2 Code No.
7 Electrical Parts List Loc. No. C213 C214 C216 C218 C219 C220 C221 C222 C223 C224 C225 C226 C227 C228 C229 C230 C231 C236 C237 C238 C239 C240 C241 C242 C243 C244 C245 C246 C247 C248 C249 C250 C251 C252 C253 C254 C255 C256 C257 C258 C259 C260 C264 C265 C267 C268 C269 C270 C271 C272 CN102 GH17LS/GH17ES Code No.
7 Electrical Parts List Loc. No. CN103 CN104 CN107 D101 D102 D103 D104 D105 D106 D107 FT101 FT102 FT103 FT104 FT105 FT106 FT109 FT110 FT112 FT113 FT201 FT202 FT203 FT204 FT205 IC101 IC102 IC103 IC104 IC105 IC106 IC107 IC109 IC110_SOCK IC112 IC115 IC116 IC117 IC118 IC202 L201 L206 L207 MP1.0 Q101 Q103 Q105 Q106 Q107 Q108 Q109 7-4 Code No.
7 Electrical Parts List Loc. No. Q110 Q111 Q201 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R144 R145 R146 R147 R148 GH17LS/GH17ES Code No.
7 Electrical Parts List Loc. No. R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R162 R165 R166 R167 R168 R169 R170 R171 R172 R173 R174 R175 R176 R184 R185 R187 R188 R189 R190 R191 R192 R193 R194 R195 R196 R197 R198 R199 R201 R202 R204 R208 R211 R212 R213 R214 R215 R216 R217 7-6 Code No.
7 Electrical Parts List Loc. No. R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R242 R243 R244 R245 R246 R247 R248 R249 R250 R251 R253 R254 R255 R259 R260 R261 R263 R264 R265 R266 R267 R268 R269 R270 R273 R274 R275 R276 R277 GH17LS/GH17ES Code No.
7 Electrical Parts List Loc. No. R278 R279 R297 R298 R299 R307 R309 R310 R311 R315 R316 R317 R318 R327 R328 R330 R331 R332 R333 R338 R339 R340 R344 R345 R347 R348 R360 R361 R362 RA201 RA202 RA203 RA204 RA205 RA206 RA207 RA208 RA209 RA210 RA211 RA212 RA213 RA214 X101 X201 ZD101 ZD102 ZD103 ZD104 ZD105 ZD106 7-8 Code No.
7 Electrical Parts List 7-2 Others Loc. No. CIS CIS CIS CN301+PAN CN302+INV Code No. BN39-00114A BN44-00029A BN41-00045A BN39-00102A BN39-00002A GH17LS/GH17ES Description CBF-SIGNAL INVERTER PCB MAIN CBF-HARNESS CBF-HARNESS Specification Remarks NL150MO,15P/15P,2990,1830MM,UL2990,IVORY,D-SUB SIC1801,4LAMP,SIC1801,18.1,14V DC,160x45x17 CEZANNE-II,FR-4 ,4,-,1.6T,117.0*172.4*1.6,CN,-,-,-,CN17MS,-,-,-,1.6+,223x118.9,-,-,-,CN17MSS,UL1571,UL/CSA,30P,90MM,BLU/WHT,AWG30,DF14-30S-1.
7 Electrical Parts List Memo 7-10 GH17LS/GH17ES
ANALOG PC GH17LS/GH17ES User Key MCU Setup Data & User I/F Jag - ASM Scaller + ADC Power Sequence Control Back Light Control CLOCK LCD Panel I/F 8 Block Diagram 8-1
8 Block Diagrams Memo 8-2 GH17LS/GH17ES
9 Wiring Diagram GH17LS/GH17ES 9-1
9 Wiring Diagram Memo 9-2 GH17LS/GH17ES
10 Schematic Diagrams 10-1 Main Part Schematic Diagram +5V DBRED(0:7) ZD101 R103 100 R107 100 1 TP139 2 BLUE1N 3 2 1 C191 100nF 2 A B C165 100nF C166 3.3uF C193 10uF 16V C A B DCLK 1 C C111 10uF 3 R194 3.9K C112 100nF B R111 R115 C114 100nF 10K 10K R270 560 E FT105 Q106 E LVDS_EN R185 100K D105 10K 10K R116 R117 R118 R119 R120 Q105 3 47 10K 10K LVDS3.
10 Schematic Diagrams 1 10-2 7 GH17LS/GH17ES
10 Schematic Diagrams 10-2 Main Part Schematic Diagram +3.3V PLL_2.5V 2.5VJA1 L201 3.3UH 3.3VJS C222 C223 C224 C202 C201 100nF 100nF 100nF 10uF 100nF L206 3.3UH C216 10uF L207 3.3UH C218 10uF 2.5VJA2 3.3VJP C238 C239 100nF 100nF C225 C208 C207 100nF 10uF 100nF C240 100nF 3.3VJS C226 C210 C209 100nF 10uF 100nF 2.5VJS 3.3VJF +2.5V C227 100nF FT205 2 2 1 B A 2.
10 Schematic Diagrams 2 3 5 6 10-4 4 GH17LS/GH17ES
11 Panel Description Maker VENDOR P/N PANEL_ABB Description SEC LT140X1-002 SA SEC LT150XS-L01 SB L01 SEC LT150XS-L01-B SC L01-B SEC LTM150XS-L02 SD L02 SEC LT181E2-132 SE E2(18.1)-132 SEC LT150XS-T01 SF T01 SEC LTM181E3-132 SG E3(18.
11 Panel Description Memo 11-2 GH17LS/GH17ES
