Samsung GH15H series Service Manual
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Samsung GH15H series Service Manual

Samsung GH15H series Service Manual

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SERVICE
TFT-LCD MONITOR
TFT-LCD MONITOR
GH15H*
Manual
10. Panel Description
CONFIDENTIAL
CONTENTS

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Summary of Contents for Samsung GH15H series

  • Page 1: Table Of Contents

    CONFIDENTIAL TFT-LCD MONITOR GH15H* SERVICE Manual TFT-LCD MONITOR 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. Panel Description...

  • Page 2: Precautions

    CONFIDENTIAL 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 (READING SHOULD circuit board. NOT BE ABOVE 0.5mA) Disconnect the AC power and DC Power Jack before servicing.

  • Page 3: Servicing Precautions

    CONFIDENTIAL 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

    CONFIDENTIAL 2 Product Specifications 2-1 Specifications Item Description LCD Panel TFT-LCD panel, RGB vertical stripe, normaly white, 15-Inch viewable, 0.297 mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Referring ~ Timing chart, Page 2-3, 2-4) Vertical : 50 Hz ~ 75 Hz (Referring ~ Timing chart, Page 2-3, 2-4) Display Colors 16,003,008 colors Maximum Resolution...

  • Page 5: Pin Assignments

    CONFIDENTIAL 2 Product Specifications 2-2 Pin Assignments Sync 15-Pin Signal Cable Connector Type Separate Composite Sync-on-green Pin No. Green Green Green + H/V Sync. Blue Blue Blue GND (DDC Return) GND (DDC Return) GND (DDC Return) GND-R GND-R GND-R GND-G GND-G GND-G GND-B...

  • Page 6: Timing Chart

    CONFIDENTIAL 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 VESA VGA1/70 Hz VGA3/60 Hz VGA2/70 Hz 800/60 Hz 640/72 Hz 640/75 Hz 800/56 Hz...
  • Page 7 CONFIDENTIAL 2 Product Specifications Table 2-1 Timing Chart (Continued) Mode VESA 640/67 Hz 832/75 Hz 1024/60Hz 1024/70Hz 1024/75Hz 800/72 Hz 800/75 Hz 1024x768 1024x768 1024x768 640 x 480 832 x 624 800 x 600 800 x 600 Timing fH (kHz) 35.000 49.726 48.077...

  • Page 8: Disassembly & Reassembly

    CONFIDENTIAL 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the GH15H* monitor. WARNING: This monitor contains electrostatically sensitive devices. Use with caution when handling these components. 3-1 Disassembly Cautions:1. Disconnect the monitor from the power source before disassembly. 2.
  • Page 9 CONFIDENTIAL 3 Disassembly and Reassembly 3-2 Replacement Order of Lamp Assemblies 1. After confirm there is nothing on the disk Turn the LCD module over and put it on a flat desk set to the ground. 2. Push down the stopper and slide the lamp unit.
  • Page 10 CONFIDENTIAL 3 Disassembly and Reassembly 4. Please fix the new lamp units on the LCD module : opposite process 2 and 3 Replacement of lamp unit should be done at the power off state and recommanded clean bench condition. 3-3 Reassembly Reassembly procedures are in the reverse order of Disassembly procedures.
  • Page 11 CONFIDENTIAL 3 Disassembly and Reassembly Memo GH15H*...

  • Page 12: Troubleshooting

    CONFIDENTIAL 4 Troubleshooting Notes: 1. Before troubleshooting, setup the PC’s display as below. • Resolution: 1024 x 768 • H-frequency: 48 kHz • V-frequency: 60 Hz 2. If no picture appears, make sure the power cord is correctly connected. 3. Check the following circuits. •...
  • Page 13 CONFIDENTIAL 4 Troubleshooting 4-2 No Video Does the H-sync pulse Check CN102. appear at Pin 9 of IC108? Does the H-sync pulse Replace IC108 or appear at Pin 150 of IC105? check its related circuit. Does the V-sync pulse check CN102. appeaer at Pin 30 of IC301? Does the V-sync pulse Replace IC301 or...
  • Page 14 CONFIDENTIAL 4 Troubleshooting WAVEFORMS GH15H*...
  • Page 15 CONFIDENTIAL 4 Troubleshooting 4-3 User Controls Don’t Work Does the DC level change at Check the buttons. Pin 35 and 36 of IC301 when you (SW801~SW808) push the front panel button? Refer to 4-4 No OSD Display. 4-4 No OSD There is video but no OSD.
  • Page 16 CONFIDENTIAL 4 Troubleshooting 4-5 No SOUND Does the DC 12V appear at Pin 15, 16 of IC401 and Check Q403, Q401 and related circuit. Pin 5, 6, 7, 8 of Q403? Does the sound input signal Check CN401 appear at Pin 4 and 9 of IC401? and related circuit.
  • Page 17 CONFIDENTIAL 4 Troubleshooting 4 Troubleshooting 4-6 Microphones Don’t Work Does the PC’s sound Check the PC’s sound program program operate well? and compatibility. Is the connection between the Connect the cable between the PC and monitor secure? PC and monitor. Check the connection between Is the Internal Microphone CN808 on the Audio PCB and the...

  • Page 18: Exploded View & Parts List

    CONFIDENTIAL 5 Exploded View and Parts List GH15H*...
  • Page 19 CONFIDENTIAL 5 Exploded View & Parts List Memo GH15H*...

  • Page 20: Electrical Parts List

    CONFIDENTIAL 6 Electrical Parts List 6-1 Main PCB Parts Loc. No. Code No. Description Specification Remarks BN94-00254A ASSY PCB MAIN-SN GH15LS BN83-00057A CKD-BN44-00053A BN44-00053A,3301-000011 BN83-00057A CKD-BN44-00053A BN44-00053A,3301-000011 BN83-00025A CKD-BN44-00053A BN44-00053A,PCX2 BN83-00081A CKD-BN44-00056A BN44-00056A,2203-000206 BN83-00032A CKD-BN44-00053A BN44-00053A,2401-000613 BN83-00086A CKD-BN44-00056A BN44-00056A,2203-002793 BN83-00033A CKD-BN44-00053A BN44-00053A,2301-000016 BN83-00086A...
  • Page 21 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks BN83-00059A CKD-BN44-00053A BN44-00053A,HEATSINK—TR1 BN83-00060A CKD-BN44-00053A BN44-00053A,HEATSINK—TR2 BN83-00138A CKD-BUSHING BN44-00053A,SK-BU-0002 BN83-00139A CKD-LABEL BN44-00053A,4M00-2552 BN83-00140A CKD-NUT BN44-00053A,HT1-M3(ZN) BN83-00142A CKD-RUBBER BN44-00053A,4M80-2556 BN83-00143A CKD-SCREW BN44-00053A,BHTB-M3X6(ZN) BN83-00144A CKD-SCREW BN44-00053A,PH-M3X8(ZN) BN44-00056A INVERTER GOGH,SIC1542,48KHZ,12VDC,1.5MARMS,5.6MARMS,48KHZ,37*140*16.0,4LAMP,40~56KV,-,SIC BN83-00137A CKD-BN44-00056A BN44-00056A,2007-000091 BN72-00209A...
  • Page 22 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks BN83-00050A CKD-BN44-00053A BN44-00053A,1203-000002 IN/PCB+M/PCB BN39-00161A CBF HARNESS GH15LS,UL/CSA,UL1061#28,12P/12P,160MM,WHT,AWG28,51021-1200,51021-1200,-,-,1.25MM IN/PCB+SH/COV 6003-000117 SCREW-TAPTITE BH,+,B,M3,L6,ZPC(YEL),SWRCH18A INSULATOR BN83-00113A CKD-BN44-00056A BN44-00056A,LH72-00170A BN83-00051A CKD-BN44-00053A BN44-00053A,BH27-00050A BN83-00107A CKD-BN44-00056A BN44-00056A,LH27-00145A BN83-00051A CKD-BN44-00053A BN44-00053A,BH27-00050A BN83-00107A CKD-BN44-00056A BN44-00056A,LH27-00145A LVDS+SH/COV 6003-000117 SCREW-TAPTITE...
  • Page 23 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks BN83-00019A CKD-BN44-00053A BN44-00053A,2001-000042 BN83-00087A CKD-BN44-00056A BN44-00056A,2007-000671 BN83-00011A CKD-BN44-00053A BN44-00053A,2001-001129 BN83-00088A CKD-BN44-00056A BN44-00056A,2007-001010 BN83-00087A CKD-BN44-00056A BN44-00056A,2007-000671 BN83-00089A CKD-BN44-00056A BN44-00056A,2007-000794 BN83-00089A CKD-BN44-00056A BN44-00056A,2007-000794 BN83-00090A CKD-BN44-00056A BN44-00056A,2007-000098 BN83-00090A CKD-BN44-00056A BN44-00056A,2007-000098 BN83-00091A CKD-BN44-00056A BN44-00056A,2007-000096 BN83-00093A...
  • Page 24 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks BN83-00095A CKD-BN44-00056A BN44-00056A,2007-000122 BN83-00095A CKD-BN44-00056A BN44-00056A,2007-000122 BN83-00095A CKD-BN44-00056A BN44-00056A,2007-000122 BN83-00094A CKD-BN44-00056A BN44-00056A,2007-000102 BN83-00094A CKD-BN44-00056A BN44-00056A,2007-000102 BN83-00097A CKD-BN44-00056A BN44-00056A,2007-001114 BN83-00016A CKD-BN44-00053A BN44-00053A,2001-000003 BN83-00092A CKD-BN44-00056A BN44-00056A,2007-000872 BN83-00103A CKD-BN44-00056A BN44-00056A,2007-000070 BN83-00104A CKD-BN44-00056A BN44-00056A,2007-002422 BN83-00104A...
  • Page 25 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks C106 2402-000170 C-AL,SMD 1uF,20%,50V,GP,TP,4.3x4.3x5.4, C112 2409-001029 C-ORGANIC 120uF,20%,6.3V,WT,TP,10.3x10.3x10.3mm,9 C131 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C132 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C133 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C134 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C135 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C136 2203-000257 C-CERAMIC,CHIP...
  • Page 26 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks C228 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C229 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C230 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C232 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C301 2402-000108 C-AL,SMD 10uF,20%,16V,WT,TP,4.3x4.3x5.4 C302 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C303 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C304 2203-000257 C-CERAMIC,CHIP...
  • Page 27 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks R106 2007-000102 R-CHIP 100Kohm,5%,1/16W,DA,TP,1608 R107 2007-000090 R-CHIP 10KOHM,5%,1/16W,DA,TP,1608 R108 2007-000078 R-CHIP 1Kohm,5%,1/16W,DA,TP,1608 R109 2007-000090 R-CHIP 10KOHM,5%,1/16W,DA,TP,1608 R110 2007-000090 R-CHIP 10KOHM,5%,1/16W,DA,TP,1608 R113 2007-001167 R-CHIP 75ohm,5%,1/16W,DA,TP,1608 R114 2007-000074 R-CHIP 100ohm,5%,1/16W,DA,TP,1608 R115 2007-001167 R-CHIP...
  • Page 28 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks R346 2007-000084 R-CHIP 4.7Kohm,5%,1/16W,DA,TP,1608 R347 2007-000084 R-CHIP 4.7Kohm,5%,1/16W,DA,TP,1608 R348 2007-000078 R-CHIP 1Kohm,5%,1/16W,DA,TP,1608 R349 2007-000075 R-CHIP 220ohm,5%,1/16W,DA,TP,1608 R350 2007-000077 R-CHIP 470ohm,5%,1/16W,DA,TP,1608 R351 2007-000120 R-CHIP 680ohm,5%,1/16W,DA,TP,1608 R362 2007-000090 R-CHIP 10KOHM,5%,1/16W,DA,TP,1608 R371 2007-000074 R-CHIP...
  • Page 29 CONFIDENTIAL 6 Electrical Parts List 6-2 Others Loc. No. Code No. Description Specification Remarks BN90-00174A ASSY COVER/REAR GH15LS*N(DS/ES),WW,ABS HB,IV16,SAMSUNG BN75-00151A UNIT/COVER-REAR GH15L/GH15E,WW,ABS HB,-,IV16,-,-,- BN70-00176A BRACKET VESA RB15AS,SECC,-,1.0,-,-,-,-,- BN72-00197A COVER REAR GH15LS,ABS,IV16,-,HB,-,-,- BN90-00175A ASSY STAND GH15-SN,WW,ABS/HB,IV16,WW BN75-00168A UNIT/STAND GH15-SN,WW,ABS/HB,-,IV16,-,-,- 6003-000133 SCREW-TAPTITE...
  • Page 30 CONFIDENTIAL 6 Electrical Parts List Loc. No. Code No. Description Specification Remarks S/COV_T/S+T/S 6003-000117 SCREW-TAPTITE BH,+,B,M3,L6,ZPC(YEL),SWRCH18A 6502-000131 CABLE CLAMP DAWS-1NA,ID10,-,NTR,NYLON66 BN39-00114A CBF SIGNAL NL15MO,15P/15P,2990,1830MM,UL2990,IVORY,D-SUB/MALE,-,-,- BN39-00129B LEAD CONNECTOR ASSY GH15HS,UL1007#26,UL/CSA,2P,-,-,#26,5051-02,SMH250-02,BK,-,-,160MM,1007#26,SJ01-0 BN39-00199A CBF SIGNAL GH17HS,9P/7P,UL2464#26,1650MM,UL2464,IVORY,DSUB/FEMALE,#26,-,SJ01-01-216 BN59-00240A TOUCH/PANEL 331.47X254.76X13.05M,13-5811-113MA(ASS’Y),15’ CAPACITIVE BN63-00046A GASKET-EMI 1503FP,-,15MM,17MM,70MM,-,-,EMI BN63-00055A GASKET GH15LS/MS/DS,-,6.0MM,10MM,90MM,-,EMI,-...
  • Page 31 CONFIDENTIAL 6 Electrical Parts List Memo 6-12 GH15H*...

  • Page 32: Block Diagram

    CONFIDENTIAL 7 Block Diagram GH15H*...
  • Page 33 CONFIDENTIAL 7 Block Diagrams Memo GH15H*...

  • Page 34: Wiring Diagram

    CONFIDENTIAL 8 Wiring Diagram 8 Wiring Diagram GH15H*...
  • Page 35 CONFIDENTIAL 8 Wiring Diagram Memo GH15H*...

  • Page 36: Schematic Diagrams

    CONFIDENTIAL 9 Schematic Diagrams 9-1 Main Part Schematic diagram +3.3V_S For Japanese OSD PC_RED_IN DHCLK C140 C141 TP78 FT110 100uF 100nF PC_GREEN_IN BLM41P600S R205 1/16W TP918 C180 C181 PC_BLUE_IN 100nF 100nF TP378 IC106 TP80 TP71 BD181 1.5uH R206 1/16W C183 NC7SZ04P5X SOURCE_PC TP375...
  • Page 37 CONFIDENTIAL 9 Schematic Diagrams GH15H*...
  • Page 38 CONFIDENTIAL 9 Schematic Diagrams 9-2 Audio Part Schematic diagram +12V_IN +12V_AUDIO Q403 SI4435DY FT401 R415 C420 2 S2 100K 33uF 3 S3 1/16W 4 G1 BLM41P600S R416 R412 AUDIO_STANDBY 100K TP22 1/16W FT402 SW_REG_EN R417 R413 Q402 100K BLM41P600S 2SC2412K-Q 1/16W AGND BL_EN...
  • Page 39 CONFIDENTIAL 9 Schematic Diagrams Memo GH15H*...
  • Page 40 Samsung Electronics Co.,Ltd. 416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do, Korea. Printed in Korea P/N : BN81-00026E-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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