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Samsung LLF19US Service Manual
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Samsung LLF19US 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.
All manuals and user guides at all-guides.com
LCD-Monitor
Chassis
Model
: LLF19US
: LD190G
Manual
Contens
1. Precautions
2. Product specifications
3. Disassembly and Reassemble
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram

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Summary of Contents for Samsung LLF19US

  • Page 1 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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.
  • Page 3 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 5. Exploded View & Part List 5. Exploded View & Part List 5-1. LS19LFUGF8LZD Exploded View...
  • Page 5 All manuals and user guides at all-guides.com 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...
  • Page 6 All manuals and user guides at all-guides.com 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...
  • Page 7 All manuals and user guides at all-guides.com 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...
  • Page 8 All manuals and user guides at all-guides.com 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-...
  • Page 9 All manuals and user guides at all-guides.com 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...
  • Page 10 All manuals and user guides at all-guides.com 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...
  • Page 11 All manuals and user guides at all-guides.com 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...
  • Page 12 All manuals and user guides at all-guides.com 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...
  • Page 13 All manuals and user guides at all-guides.com 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...
  • Page 14 All manuals and user guides at all-guides.com 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...
  • Page 15 All manuals and user guides at all-guides.com 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...
  • Page 16 All manuals and user guides at all-guides.com 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 T0568 3301-001404 BEAD-SMD;30ohm,2012,TP,15.9OHM/30MHz ..4 T0568 3301-001404 BEAD-SMD;30ohm,2012,TP,15.9OHM/30MHz ..4 T0568 3301-001404 BEAD-SMD;30ohm,2012,TP,15.9OHM/30MHz ..4 T0568 3301-001404 BEAD-SMD;30ohm,2012,TP,15.9OHM/30MHz ..4 T0568 3301-001404...
  • Page 17 All manuals and user guides at all-guides.com 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...
  • Page 18 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 4. Troubleshooting 4-2-1. Circuit diagrams when the power does not turn on...
  • Page 21 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 4. Troubleshooting 4-3-1. When a blank screen is displayed ② ① ④ ③...
  • Page 23 All manuals and user guides at all-guides.com 4. Troubleshooting 4-3-2. Waveforms when no screen is displayed ① ③ ④...
  • Page 24 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 4. Troubleshooting 4-4-1. Circuit diagrams when no screen is displayed (USB Input) To confirm the description of ① : For ① , refer to the Device List in the Product Features and Restrictions section. ②...
  • Page 26 All manuals and user guides at all-guides.com 4. Troubleshooting 4-4-2. Waveforms when a blank screen is displayed (USB Input) ④ ⑤ ②...
  • Page 27 All manuals and user guides at all-guides.com 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.
  • Page 28 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 All manuals and user guides at all-guides.com 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.
  • Page 30 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 6. Wiring Diagram 6. Wiring Diagram 6-1. Wiring Diagram - Main Board...
  • Page 37 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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.
  • Page 39 All manuals and user guides at all-guides.com 6. Wiring Diagram Memo...

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Ld190g