Samsung LD190G Service Manual
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Samsung LD190G Service Manual

Samsung LD190G Service Manual

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SERVICE
TFT-LCD Monitor
LD190G
Refer to the service manual in the GSPN (see the rear cover) for the more information.
LCD-Monitor
Chassis
: LLF19US
Model
: LD190G
Manual
1. Precautions
2. Product specifications
3. Disassembly and Reassemble
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
Contens

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Summary of Contents for Samsung LD190G

  • Page 1 LCD-Monitor Chassis : LLF19US Model : LD190G SERVICE Manual TFT-LCD Monitor Contens 1. Precautions 2. Product specifications 3. Disassembly and Reassemble 4. Troubleshooting 5. Exploded View & Part List 6. Wiring Diagram LD190G Refer to the service manual in the GSPN (see the rear cover) for the more information.

  • Page 2: Table Of Contents

    Contents 1. Precautions ......................1-1 1-1. Safety Precautions ......................1-1 1-2. Servicing Precautions ..................... 1-2 1-3. Static Electricity Precautions ..................1-2 1-4. Installation Precautions ....................1-3 2. Product specifications .................... 2-1 2-1. Feature & Specifications ....................2-1 2-2. Spec Comparison to the Old Models ................2-2 2-3.
  • Page 3 GSPN (Global Service Partner Network) Area Web Site North America http://service.samsungportal.com Latin America http://latin.samsungportal.com http://cis.samsungportal.com Europe http://europe.samsungportal.com China http://china.samsungportal.com Asia http://asia.samsungportal.com Mideast & Africa http://mea.samsungportal.com © 2009 Samsung Electronics Co.,Ltd. This Service Manual is a property of Samsung Electronics Co.,Ltd. All rights reserved. Any unauthorized use of Manual can be punished under applicable Printed in Korea International and/or domestic law. P/N: BN82-00602A-00...

  • Page 4: Exploded View & Part List

    5. Exploded View & Part List 5. Exploded View & Part List 5-1. LS19LFUGF8LZD Exploded View...
  • Page 5 5. Exploded View & Part List 5-1-1. LS19LFUGF8LZD Parts List Location No. Code No. Description & Specification Q’ty SA/SNA Remark CIS4 BN61-04983A HOLDER-STAND;LAPFIT 18.5”,ACETAL,T3.0,WH S.N.A M0006 BN63-05341A COVER-REAR;#LAPFIT,ABS+PMMA,HB,BK23,G/DL S.N.A M0014 BN94-02513F ASSY PCB MAIN;LS19LFUGF8/ZC M0107 BN63-05342A SHIELD-COVER;LAPFIT,SECC,T0.8 S.N.A M0145 BN96-09922A ASSY BOARD P-FUNCTION;lapfit18.5”,CT5000 M0174 BN44-00282A...

  • Page 6: Parts List

    5. Exploded View & Part List 5-2 LS19LFUGF8LZD Parts List Service Bom (SA: SERVICE AVAILABLE, SNA: SERVICE NOT AVAILABLE) Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark LS19LFUGF8LZD LD190G,WVH1/S19L0-LLF,19,LCD-MO,BRAZIL ASSY COVER FRONT;LS19LF,D190SU,BLACK M0001 BN90-02008A S.N.A ,HIG ASSY COVER P-FRONT;LS19LFU,ABS+PMMA T0003 BN96-09461A ,HB,B SCREW-TAPTYPE;BH,+,B,M3,L6,ZPC(BLK),SW...
  • Page 7 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ASSY STAND P;LAPFIT,ABS HB HIGH ...3 M0003 BN96-09446A GLOSSY,B HOLDER-ROLLER;LAPFIT ..4 BN61-04984A S.N.A 18.5”,ELASTOMER,BK2 ..4 CCM1 BN63-02183C COVER-SHEET;Rhcm,PE Vinyl,T0.05,200mm,20 S.N.A COVER-STAND FRONT;LAPFIT ..4 BN63-05359A S.N.A 18.5”,ABS,HB,BK...
  • Page 8 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark TR-SMALL SIGNAL;KTC3875S- ..4 Q205 0501-000445 Y,NPN,150mW,SOT TR-SMALL SIGNAL;KTC3875S- ..4 Q290 0501-000445 Y,NPN,150mW,SOT TR-SMALL SIGNAL;KTC3875S- ..4 Q401 0501-000445 Y,NPN,150mW,SOT TR-SMALL SIGNAL;2SC2412K,NPN,200mW,SC- ..4 Q203 0501-002080 TR-SMALL SIGNAL;2SC2412K,NPN,200mW,SC- ..4 Q204...
  • Page 9 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 R123 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R124 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R126 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R127 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R130 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R131 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R133...
  • Page 10 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 R228 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R229 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R230 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R232 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R233 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R234 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R290...
  • Page 11 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 C113 2203-000236 C-CER,CHIP;0.1nF,5%,50V,C0G,1608 S.N.A ..4 C211 2203-000236 C-CER,CHIP;0.1nF,5%,50V,C0G,1608 S.N.A ..4 C452 2203-000236 C-CER,CHIP;0.1nF,5%,50V,C0G,1608 S.N.A ..4 C117 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C440 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C443 2203-000257...
  • Page 12 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 C311 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C312 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C313 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C314 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C315 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C318 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C319...
  • Page 13 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 C621 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C622 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C627 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C629 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C630 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C632 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C633...
  • Page 14 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 C340 2203-005065 C-CER,CHIP;1000nF,+80-20%,10V,Y5V,1608 S.N.A ..4 C341 2203-005065 C-CER,CHIP;1000nF,+80-20%,10V,Y5V,1608 S.N.A ..4 C342 2203-005065 C-CER,CHIP;1000nF,+80-20%,10V,Y5V,1608 S.N.A ..4 C343 2203-005065 C-CER,CHIP;1000nF,+80-20%,10V,Y5V,1608 S.N.A ..4 C344 2203-005065 C-CER,CHIP;1000nF,+80-20%,10V,Y5V,1608 S.N.A ..4...
  • Page 15 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 C464 2203-006361 C-CER,CHIP;10000nF,10%,10V,X5R,TP,2012 ..4 C465 2203-006361 C-CER,CHIP;10000nF,10%,10V,X5R,TP,2012 ..4 C466 2203-006361 C-CER,CHIP;10000nF,10%,10V,X5R,TP,2012 ..4 C601 2203-006361 C-CER,CHIP;10000nF,10%,10V,X5R,TP,2012 ..4 C611 2203-006361 C-CER,CHIP;10000nF,10%,10V,X5R,TP,2012 ..4 C612 2203-006361 C-CER,CHIP;10000nF,10%,10V,X5R,TP,2012 ..4 C613...
  • Page 16 M0106 3708-001150 A,SN,Y ..4 T0010 BN27-00009A COIL CHOKE;SMD 12x12x6,EOS,33uH,15%,0.12 ..4 T0077 BN41-01261A PCB MAIN;lapfit 18.5” ubisync,CEM-3,4,MP S.N.A ..4 M0018 BN97-03038G ASSY MICOM;Lapfi LD190G,LS19LFCGFZ/ZW,11 S.N.A IC-FLASH MEMORY;MX25L1005,1Mbit,1Mx1,S ..5 IC115 1107-001614 S.N.A ..4 M0018 BN97-03038H ASSY MICOM;Lapfi LD190G,LS19LFCGFZ/ZW,11 S.N.A ..5 IC112 1103-001385 IC-EEPROM;AT24C256,256Kbit,32Kx8,SOP,8P,...
  • Page 17 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark MANUAL FLYER-01,QSG;COMM,SyncMaster,W/ ...3 BN68-01892B S.N.A ...3 BN39-00397G CBF IF-USB CABLE;LAPFIT,4P/4P,2725(USB2. MANUAL FLYER-INSTALLATION ...3 BN68-02216C S.N.A GUID;comm,Sync M0003 BN92-04962K ASSY BOX;LS19LFUGF8/XK S.N.A BN69-03473D BOX-SET;LAP-FAT(18.5),CB,A1,W503,D354,H9 S.N.A 5-14...

  • Page 18: Troubleshooting

    4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting Set custom mode as follows before beginning a repair. • Resolution: 1360 X 768 • H-frequency: 47.5 kH z • V-frequency: 60 Hz If the screen is blank, check whether the power cord is connected correctly. The circuits to check: •...

  • Page 19: When The Power Does Not Turn On

    4. Troubleshooting 4-2. When the Power Does Not Turn On - When turning on the Power button after connecting the power cable, the LED at the front of the Symptom monitor does not operate. - When turning on the Power button after connecting the power cable, the LED at the front of the monitor does not operate.
  • Page 20 4. Troubleshooting 4-2-1. Circuit diagrams when the power does not turn on...

  • Page 21: When The Screen Is Blank

    4. Troubleshooting 4-3. When the screen is blank Symptom - Even though the LED power turns on, the screen is blank when connecting the VGA cable. - Even though the LED power turns on, the screen is blank when connecting the VGA cable. - Check the D-sub cable connections.
  • Page 22 4. Troubleshooting 4-3-1. When a blank screen is displayed ② ① ④ ③...
  • Page 23 4. Troubleshooting 4-3-2. Waveforms when no screen is displayed ① ③ ④...

  • Page 24: No Video (Usb Input)

    4. Troubleshooting 4-4. No Video (USB Input) Symptom - Even though the LED power turns on, the screen is blank when the USB cable is connected. - Check the USB cable connections. - Check whether the USB driver is installed onto the PC correctly. Major checkpoints - Check whether the USB display device is recognized correctly after connecting the USB cable.
  • Page 25 4. Troubleshooting 4-4-1. Circuit diagrams when no screen is displayed (USB Input) To confirm the description of : For , refer to the Device List in the Product Features and Restrictions section. ① ① ② ② ④ ③ ⑤...
  • Page 26 4. Troubleshooting 4-4-2. Waveforms when a blank screen is displayed (USB Input) ④ ⑤ ②...

  • Page 27: Error Examples And Actions

    4. Troubleshooting 4-5. Error Examples and Actions Error Appearance Symptoms and Actions Remarks Symptom: 1) The PC does not recognize the USB *Identifying whether the driver is monitor. installed correctly. 2) A No Video error occurs when USB signals are received. Cause: The USB monitor driver is not installed correctly on the PC.

  • Page 28: Adjustment

    1) Use when updating the AD board code. 2) Download the WinDDC program, DDC Input program, and Hex and DDC files appropriate to the model through the Quality Control department of Samsung Electronics. Install the jig and input the data, as shown in the figure. Monitor needing...
  • Page 29 4. Troubleshooting 4-5-2. Service Function Specifications Checking the Code Version  1. Check the MCU code version and checksum after entering SVC Mode. 2. Entering SVC Mode - Menu --> Magic Bright --> Note PC - Hold down the Enter button for five (5) seconds. - The SVC Function OSD is displayed.
  • Page 30 4. Troubleshooting 2. Press the down button to change the setting to On or Off. Service Mode (Replacing the Panel)  - When replacing the panel After replacing the panel, select the Panel item and then hold down the Menu button for five (5) seconds. The Ch.
  • Page 31 4. Troubleshooting Inputting the DDC Data  Use the DDC Manager MTI-2050 version or later. 1) Click the Open [F5] icon. 2) Select a port. 3) Open a DDC file. 4) Select a date and click the OK [Save] button. 5) Click the Next [OK] button.
  • Page 32 4. Troubleshooting Inputting the MCU Data  1) Check the following options. - Manufacture: MSTAR - Device Type:TSUM16_ROM128K_ext_flash - Communication Port: DSUB15 (Analog) - External Memory: PMC25LV010E 2) Click the LoadFile button, select an MCU code file, and then click the Open [O] button. 4-15...
  • Page 33 4. Troubleshooting 3) Click the Auto Program button. 4) When programming and verification are complete, hard power the monitor off and then on again. 4-16...
  • Page 34 4. Troubleshooting Inputting the Ubisync Data  1. Execute ‘service.exe’. 2. Select “UBisync.mdl” in the ÿ“Reload” window. 3. Select “Etc.” 4. Click “DL120 reset”. 4-17...
  • Page 35 4. Troubleshooting 5. Click “EEPROM. 6. Click “Load” in the displaye d window and select the lates t version of the decoder firmware. 7. Click “Write” to begin th e download. 8. Click “DL120 set”. 4-18...

  • Page 36: Wiring Diagram

    6. Wiring Diagram 6. Wiring Diagram 6-1. Wiring Diagram - Main Board...

  • Page 37: Wiring Diagram - Ip Board

    6. Wiring Diagram 6-2. Wiring Diagram - IP Board IP Connector LVDS Connector (Connect to IP- Board (Connect to Panel) Function Connector (Connect to IP-Board) USB Input RGB Connector Connector (Connect to PC) (Connect to...

  • Page 38: Connector Functions

    6. Wiring Diagram 6-3. Connector Functions Connector Functions CN2 → CN601 Supplies 5V from the power board to the main board and transmits the PWM output from the power board to the inverter. * Possible problems: The No Power and Blank Screen errors may occur. CN301 ~ CN304 Transmits the lamp current (6mA ~ 7mA) generated in the inverter to the panel lamp.
  • Page 39 6. Wiring Diagram Memo...

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