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Samsung 191T Serivce Manual

Tft-lcd monitor
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See also: Owner's Manual , User Manual
SERVICE
TFT-LCD MONITOR
TFT-LCD MONITOR
Chassis
Model
GH19B*
191T
Manual
10. Panel Description
CONFIDENTIAL
CONTENTS

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Summary of Contents for Samsung 191T

  • Page 1: Table Of Contents

    SERVICE TFT-LCD MONITOR CONFIDENTIAL TFT-LCD MONITOR Chassis Model GH19B* 191T Manual CONTENTS 1. Precautions 2. Product Specifications 3. Disassembly & Reassembly 4. Troubleshooting 5. Exploded View & Parts List 6. Electrical Parts List 7. Block Diagram 8. Wiring Diagram 9. Schematic Diagrams 10.

  • Page 2: Precautions

    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 For continued safety, do not attempt to modify the circuit board. Disconnect the AC power and DC Power Jack before servicing.
  • Page 3 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.

  • Page 4: Product Specifications

    2 Product Specifications 2-1 Specifications Item LCD Panel TFT-LCD panel, RGB vertical stripe, normally black transmissive, 0.298 mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 81 kHz (Automatic) Vertical : 56 Hz ~ 85 Hz Display Colors 16,7 Million colors Maximum Resolution Horizontal : 1280 Pixels @ 81 kHz Vertical : 1024 Pixels @ 76 Hz...
  • Page 5 2 Product Specifications 2-2 Pin Assignments Sync Type Separate Pin No. Green Blue GND (DDC Return) GND-Red GND-Green GND-Blue No Connection GND-Sync./Self Test DDC Data H-Sync. V-Sync. DDC Clock Sync Type Pin No. Rx2- Rx2+ No Connection No Connection DDC Clock (SCL) DDC Data (SDA) No Connection Rx1-...
  • Page 6 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. 2-3-1 LCD Panel Mode : 1 mode Timing No. Originator Mode Name 1280/60Hz Resolution (HxV) 1280x1024 HORIZONTAL Frequency...
  • Page 7 2 Product Specifications 2-3-2 Supported Modes (1) Timing No. Originator Mode Name VGA1 Resolution (HxV) 640x350 HORIZONTAL Frequency 31.469kHz Total time 31.778 Active time 26.058 Blank time 5.720 Border (L / R) 0.318 Data time 25.422 Front porch 0.318 Sync. width 3.813 Back porch 1.589...
  • Page 8 2 Product Specifications 2-3-2 Supported Modes (2) Timing No. VESA Originator 640/85Hz Mode Name 640x480 Resolution (HxV) HORIZONTAL Frequency 43.269kHz Total time 23.111 Active time 17.778 Blank time 5.333 Border (L / R) 0.000 Data time 17.778 Front porch 1.556 Sync.
  • Page 9 2 Product Specifications 2-3-2 Supported Modes (3) Timing No. VESA Originator 800/72Hz Mode Name 800x600 Resolution (HxV) HORIZONTAL Frequency 48.077kHz Total time 20.800 Active time 16.000 Blank time 4.800 Border (L / R) 0.000 Data time 16.000 Front porch 1.120 Sync.
  • Page 10 2 Product Specifications 2-3-2 Supported Modes (4) Timing No. VESA Originator 1024/75Hz Mode Name 1024x768 Resolution (HxV) HORIZONTAL Frequency 60.023kHz Total time 16.660 Active time 13.003 Blank time 3.657 Border (L / R) 0.000 Data time 13.003 Front porch 0.203 Sync.
  • Page 11 CONFIDENTIAL 2 Product Specifications Memo GH19B*...

  • Page 12: Disassembly & Reassembly

    3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the GH19B* 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.
  • Page 13 3 Disassembly and Reassembly 3-2 Reassembly Reassembly procedures are in the reverse order of Disassembly procedures. CONFIDENTIAL 4. Put the jig into the gap (between the right side of the panel the and Front Cover) and tilt up Front Cover until the snap opens. 5.

  • Page 14: Troubleshooting

    4-1 Troubleshooting Notes: 1. Before troubleshooting, setup the PC’s display as below. • Resolution: 1280 x 1024 • H-frequency: 63 kHz • V-frequency: 75 Hz 2. If no picture appears, make sure the power cord is correctly connected. 3. Check the following circuits. •...
  • Page 15 4 Troubleshooting 4-1-2 No Video [Analog] Check signal cable and connection. Does the video signal appear at the Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37 of IC401 and IC402? Does proper ‘High’ appear at ‘Collector’ of Q108? Check Q108, IC521 and related circuit.
  • Page 16 4 Troubleshooting 4-1-3 No Video [Digital] Check signal cable and connection. Does the video signal appear at the Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37of IC401? Does porper ‘High’ appear at ‘Collector’ of Q108? Check Q108, IC521 and related circuit. Does the input signal appear at Pin 27, 28, 30, and 31 of IC401 and IC402 (DHS,DVS,DEN,DCLK)? Does the signals appear at R301, R302,...
  • Page 17 4 Troubleshooting CONFIDENTIAL GH19B*...
  • Page 18 4 Troubleshooting 4-1-4 No Sound Does proper DC 12V appear at Pin 7, 8 of Q109? Does proper DC 12V appear at Pin1 of CN504? Check audio. GH19B* Check Q109 and related circuit. Check IC741 and related circuit. CONFIDENTIAL...
  • Page 19 CONFIDENTIAL 4 Troubleshooting Memo GH19B*...

  • Page 20: Exploded View & Parts List

    CONFIDENTIAL 5 Exploded View and Parts List GH19B*...
  • Page 21 CONFIDENTIAL 5 Exploded View & Parts List Memo GH19B*...

  • Page 22: Electrical Parts List

    6 Electrical Parts List 6-1 Main PCB Parts Loc. No. Code No. BN94-00350A ASSY PCB MAIN C373 2409-001043 C-ORGANIC C622 2409-001043 C-ORGANIC 0201-001223 ADHESIVE-TS 0202-001044 SOLDER-WIRE. 0202-001046 SOLDER-WIRE FLUX 0202-001162 SOLDER-CREAM 0202-001222 SOLDER-WIRE FLUX 0204-001095 THINNER 6011-001445 BOLT-SOCKET BN39-00162A CBF HARNESS BN39-00207B LEAD CONNECTOR-ASSY BN39-00241B...
  • Page 23 6 Electrical Parts List Loc. No. Code No. C316 2203-001607 C-CERAMIC,CHIP C317 2203-001607 C-CERAMIC,CHIP C318 2203-001607 C-CERAMIC,CHIP C319 2203-001607 C-CERAMIC,CHIP C321 2402-000135 C-AL,SMD C322 2203-005005 C-CERAMIC,CHIP C323 2203-005005 C-CERAMIC,CHIP C324 2203-005005 C-CERAMIC,CHIP C325 2203-005005 C-CERAMIC,CHIP C326 2203-001607 C-CERAMIC,CHIP C327 2203-001607 C-CERAMIC,CHIP C328 2203-001607...
  • Page 24 6 Electrical Parts List Loc. No. Code No. C404 2203-005005 C-CERAMIC,CHIP C405 2203-005005 C-CERAMIC,CHIP C410 2402-001042 C-AL,SMD C416 2203-000257 C-CERAMIC,CHIP C417 2402-000108 C-AL,SMD C423 2203-000626 C-CERAMIC,CHIP C424 2203-000626 C-CERAMIC,CHIP C513 2203-005005 C-CERAMIC,CHIP C521 2402-000176 C-AL,SMD C533 2203-000257 C-CERAMIC,CHIP C541 2203-000257 C-CERAMIC,CHIP C545 2203-005005...
  • Page 25 6 Electrical Parts List Loc. No. Code No. C679 2203-005005 C-CERAMIC,CHIP C680 2203-005005 C-CERAMIC,CHIP C681 2203-000257 C-CERAMIC,CHIP C682 2203-000257 C-CERAMIC,CHIP C683 2203-000257 C-CERAMIC,CHIP C687 2402-001044 C-AL,SMD C688 2402-001044 C-AL,SMD C689 2203-005005 C-CERAMIC,CHIP C690 2203-005005 C-CERAMIC,CHIP C691 2203-000257 C-CERAMIC,CHIP C692 2203-000257 C-CERAMIC,CHIP C693 2203-000257...
  • Page 26 6 Electrical Parts List Loc. No. Code No. IC204 1103-000129 IC-EEPROM IC301 0904-001585 IC-GRAPHIC CONT. IC401 1205-001740 IC-TRANSMITTER IC402 1205-001740 IC-TRANSMITTER IC502 1103-001023 IC-EEPROM IC507 0803-000117 IC-TTL IC510 1203-001293 IC-POSI.FIXED REG. IC512 1105-001165 IC-DRAM IC513 1105-001165 IC-DRAM IC514 1105-001165 IC-DRAM IC516 1204-001551 IC-VIDEO SYSTEM...
  • Page 27 6 Electrical Parts List Loc. No. Code No. R302 2007-000309 R-CHIP R303 2007-000309 R-CHIP R304 2007-000309 R-CHIP R305 2007-000309 R-CHIP R306 2007-000309 R-CHIP R307 2007-000309 R-CHIP R308 2007-000309 R-CHIP R309 2007-000287 R-CHIP R310 2007-000287 R-CHIP R311 2007-000287 R-CHIP R340 2007-001167 R-CHIP R341 2007-001167...
  • Page 28 6 Electrical Parts List Loc. No. Code No. R709 2007-000074 R-CHIP R710 2007-000090 R-CHIP R711 2007-000090 R-CHIP R712 2007-000090 R-CHIP R713 2007-000074 R-CHIP R715 2007-000078 R-CHIP R716 2007-000287 R-CHIP R717 2007-000287 R-CHIP R718 2007-000287 R-CHIP R720 2007-000074 R-CHIP R721 2007-000090 R-CHIP R722 2007-000084...
  • Page 29 DK-K102-80-140,T0.13,W140,L80,GRAY LTM190E1-L01,GH17LS,1280*1024,404*330*20,16.7M,36,0.098*0.294,0~50,5.0,PVA,- GH19BS GH19BS #8915,T0.15,W12,L55000,CLR DK100-50-170,T0.7,W50,L170,SIL FH,+,M3,L8,ZPC(YEL),SM20C,- BH,+,B,M3,L6,ZPC(YEL),SWRCH18A DET,2000MM,24P/24P,BLACK,-,DVI-D(M) TO DVI-D(M) NL5MO,15P/15P,2990,1830MM,UL2990,BLACK,D-SUB/MALE,-,-,- GH19PS,SPTE,T0.3 SEC(EE) PANNEL,ART-PAPER 100G,-,30,10,-,BLK,WHT,-,- GH19BSCBV/XSJ,SEJ,JAPAN ART_PAPER,100,-,-,DOMESTIC CSK5577J/LR,SEJ,JAPAN,-,-,J,- SAMSUNG 400TFT,SEJ,JAPAN,MOJO, S/M170MP,PE-LD,PE-HD,-,WHITE,- LSD210TL,PE-LD,WHITE,TFT_LCD S/M170MP,PE-HD,BLUE -,ALL,TCO95,PIVOT,W/W,ART-PAPER 90G,-,WHT,BLACK,-,-,- S/M191T,JAPAN,CB-SW4,YEL,A-1,L497*W476*H236 GH19BSCBV/XSJ,SEJ,JAPAN W/W,BARCODE,PE,T0.05,60,35,SYNC,-,PE NATURE,-,- GH19BS,W/W,PE,T0.05,90,30,SYNC,PE NATURE GH19BS GH19BS OPP/W75/CLR,T0.05,W75,L100000, MV540,B400,200,2170,-,-,YEL,-,- GH15,FOAM,T3.0,930,1000 HDPE+PE FOAM,0.02+0.5,-,Y(24),-,IBM WOOD,1020*994*130,-,ML15NS DW-2,-,-,CSD5577,-,-,-,-,-,-, LDPE,W500*T0.02,-,-...

  • Page 30: Block Diagram

    CONFIDENTIAL 7 Block Diagram GH19B*...
  • Page 31 CONFIDENTIAL 7 Block Diagrams Memo GH19B*...

  • Page 32: Wiring Diagram

    8 Wiring Diagram 12V MAIN 12V INV AC/DC ADAPTOR DPMS_ON SI9933ADY(SI) 12V DC AUDIO (OPTION) GH19B* CN402 CN503 MAIN PCB CN202 CN504 CONFIDENTIAL CN201 CN505 LED_GRN LED_RED KEY2 KEY1...
  • Page 33 CONFIDENTIAL 8 Wiring Diagram Memo GH19B*...

  • Page 34: Schematic Diagrams

    9 Schematic Diagrams 9-1 MP1.0 Part Schematic Diagram DVDD_3.3 AVDD_3.3 R300 1/16W AGND1 AGND2 AGND3 AGND4 AGND5 AGND6 AGND AGND7 REXT R301 Rx2+ R302 RX@- Rx2- R303 Rx1+ R304 RX1- Rx1- R305 Rx0+ R306 RX0- Rx0- R307 RxC+ R308 RxC- RXC- AVDD33-6 AVDD_3.3...
  • Page 35 CONFIDENTIAL 9 Schematic Diagrams GH19B*...
  • Page 36 9 Schematic Diagrams 9-2 MP1.0 Part Schematic Diagram +5V_M SOG_SYNC R694 C657 C668 47uF 100nF DGND C661 OSCO 22pF OSCI R695 C662 1/16W 0.027nF X302 12MHz DGND R521 R520 HCLK R506 KEY2 IC521 R709 KEY1 NT68F63 HDATA(3:0) HDATA(3) R753 HDATA(2) R701 R754 HDATA(1)
  • Page 37 CONFIDENTIAL 9 Schematic Diagrams GH19B*...
  • Page 38 9 Schematic Diagrams 9-3 MP1.0 Part Schematic Diagram FSCLK FSCKE FSDQM1 FSDQM0 FSWE FSCAS FSRAS FSDATA(0:47) MVDD_3.3 FSADDR(13:0) IC512 KM416S1020BT-G/F10 FSDATA(0) DQ15 FSDATA(1) DQ14 VSSO VSSO3 FSDATA(2) DQ13 FSDATA(3) DQ12 VDDO VDDO2 FSDATA(4) DQ11 FSDATA(5) DQ10 VSSO1 VSSO2 FSDATA(6) FSDATA(7) VDDO1 VDDO3 LDQM...
  • Page 39 9 Schematic Diagrams CONFIDENTIAL GH19B*...
  • Page 40 9 Schematic Diagrams 9-4 MP1.0 Part Schematic Diagram ANALOG DIGITAL DPMS DPMS DPMS_ON ON(L) OFF(H) ON(L) OFF(H) DIGITAL_DPMS ON(L) OFF(H) ON(L) OFF(H) POWER ON_OFF OFF(H) OFF(H) OFF(H) ON(L) +5V_A +12V_MAIN +12V_INV PANEL_5.0 CN503 slcon7p D267 TP1464 SS24 TP1465 TP1461 TP1458 TP1459 2 G1 D1_1 7...
  • Page 41 CONFIDENTIAL 9 Schematic Diagrams Memo GH19B*...
  • Page 42 Samsung Electronics Co.,Ltd. 416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do, Korea. Printed in Korea P/N : BN82-00073A-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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