Samsung LLF19US Service Manual Download Page 20 | Manualshive

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4-3

4. Troubleshooting

4-2-1. Circuit diagrams when the power does not turn on

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Summary of Contents for LLF19US

Page 1: ...0G Refer to the service manual in the GSPN see the rear cover for the more information 1 Precautions 2 Product specifications 3 Disassembly and Reassemble 4 Troubleshooting 5 Exploded View Part List 6 Wiring Diagram All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 2: ...ely 2 3 3 Disassembly and Assembly 3 1 3 1 Disassembly 3 1 4 Troubleshooting 4 1 4 1 Troubleshooting 4 1 4 2 When the Power Does Not Turn On 4 2 4 3 When the screen is blank 4 4 4 4 No Video USB Input 4 7 4 5 Error Examples and Actions 4 10 4 6 Adjustment 4 11 5 Exploded View Part List 5 1 5 1 Exploded View 5 1 5 2 Parts List 5 3 6 Wiring Diagram 6 1 6 1 Wiring Diagram Main Board 6 1 6 2 Wiring Di...

Page 3: ... China http china samsungportal com Asia http asia samsungportal com Mideast Africa http mea samsungportal com This Service Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law 2009 Samsung Electronics Co Ltd All rights reserved Printed in Korea P N BN82 00602A 00 All manuals and user guides at all guid...

Page 4: ...t 5 Exploded View Part List 5 1 LS19LFUGF8LZD Exploded View T0003 M0215 M0145 T0245 M0174 CIS4 M0006 BN63 05359A BN63 05360A BN61 05080A M0107 T0103 M0014 T0514 BN63 05343A BN61 04672C All manuals and user guides at all guides com ...

Page 5: ...amp 0 1 S A M0215 BN07 00704A LCD PANEL CLAA185WA03A 1 S A T0003 BN96 09461A ASSY COVER P FRONT LS19LFU ABS PMMA HB B 1 S A T0103 BN61 05079A BRACKET FRAME LAPFIT SECC T0 8 1 S N A T0245 BN61 04968A HOLDER PCB LAPFIT ABS HB 1 S N A T0514 BN61 04965A BRACKET SUPPORT LAPFIT SPTE T0 3 1 S N A BN61 04672C GUIDE PANEL 943SB CMO CPT SECC T0 8 1 S N A BN61 04984A HOLDER ROLLER LAPFIT 18 5 ELASTOMER BK2 1...

Page 6: ...1 002643 LED SMD SIDE VIEW RED 3 8x1 0x0 42mm 1 S N A 6 L0405 0601 002643 LED SMD SIDE VIEW RED 3 8x1 0x0 42mm 1 S N A 6 L0405 0601 002643 LED SMD SIDE VIEW RED 3 8x1 0x0 42mm 1 S N A 6 IC1 1209 001838 IC SENSOR CT1C08 MLF 24P 4x4mm PLASTIC 5 1 S A 6 R8 2007 000070 R CHIP 0ohm 5 1 10W TP 1608 1 S N A 6 R1 2007 000075 R CHIP 220ohm 5 1 10W TP 1608 1 S A 6 R2 2007 000075 R CHIP 220ohm 5 1 10W TP 160...

Page 7: ...0 025 S N A 3 CN102 3701 001219 CONNECTOR DSUB 15P 3R FEMALE ANGLE AUF 1 S A 3 CN601 3711 004261 HEADER BOARD TO BOARD BOX 12P 1R 2mm ANG 1 S A 3 CN701 3722 001101 JACK USB 4P 1C AU IVR ANGLE B TYPE 1 S A 3 M0214 BN96 07252B ASSY CABLE P FLAT LIME Flat cable 100mm 1 S A 3 T0174 BN97 03028F ASSY SMD LS19LFUGF8 ZC 1 S N A 4 SUB05 0202 001477 SOLDER CREAM LST309 M D20 45um 96 5Sn 3A 0 5 S N A 4 D115 ...

Page 8: ... 100Kohm 1 1 10W TP 1608 1 S N A 4 R213 2007 000070 R CHIP 0ohm 5 1 10W TP 1608 1 S N A 4 R217 2007 000070 R CHIP 0ohm 5 1 10W TP 1608 1 S N A 4 R221 2007 000070 R CHIP 0ohm 5 1 10W TP 1608 1 S N A 4 R242 2007 000070 R CHIP 0ohm 5 1 10W TP 1608 1 S N A 4 R270 2007 000070 R CHIP 0ohm 5 1 10W TP 1608 1 S N A 4 R271 2007 000070 R CHIP 0ohm 5 1 10W TP 1608 1 S N A 4 R272 2007 000070 R CHIP 0ohm 5 1 10...

Page 9: ... 1 S A 4 R405 2007 000074 R CHIP 100ohm 5 1 10W TP 1608 1 S A 4 R264 2007 000078 R CHIP 1Kohm 5 1 10W TP 1608 1 S A 4 R136 2007 000080 R CHIP 2Kohm 5 1 10W TP 1608 1 S N A 4 R206 2007 000080 R CHIP 2Kohm 5 1 10W TP 1608 1 S N A 4 R292 2007 000080 R CHIP 2Kohm 5 1 10W TP 1608 1 S N A 4 R330 2007 000082 R CHIP 3 3Kohm 5 1 10W TP 1608 1 S N A 4 R331 2007 000082 R CHIP 3 3Kohm 5 1 10W TP 1608 1 S N A ...

Page 10: ...1 S A 4 R129 2007 000821 R CHIP 390ohm 1 1 10W TP 1608 1 S N A 4 R219 2007 000821 R CHIP 390ohm 1 1 10W TP 1608 1 S N A 4 R361 2007 000929 R CHIP 470ohm 1 1 10W TP 1608 1 S N A 4 R413 2007 000965 R CHIP 5 1Kohm 5 1 10W TP 1608 1 S N A 4 R134 2007 001044 R CHIP 56ohm 5 1 10W TP 1608 1 S A 4 R135 2007 001044 R CHIP 56ohm 5 1 10W TP 1608 1 S A 4 R125 2007 001164 R CHIP 75ohm 1 1 10W TP 1608 1 S N A 4...

Page 11: ... 000888 C CER CHIP 4 7nF 10 50V X7R TP 1608 1 S A 4 C115 2203 000888 C CER CHIP 4 7nF 10 50V X7R TP 1608 1 S A 4 C116 2203 000888 C CER CHIP 4 7nF 10 50V X7R TP 1608 1 S A 4 C118 2203 000888 C CER CHIP 4 7nF 10 50V X7R TP 1608 1 S A 4 C119 2203 000888 C CER CHIP 4 7nF 10 50V X7R TP 1608 1 S A 4 C120 2203 000888 C CER CHIP 4 7nF 10 50V X7R TP 1608 1 S A 4 C316 2203 000903 C CER CHIP 0 0047nF 0 25pF...

Page 12: ...R 1608 1 S A 4 C355 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C356 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C357 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C361 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C362 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C363 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C364 2203 005005 C CER CHIP 100nF 10 ...

Page 13: ...6 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C657 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C658 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C659 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C661 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C662 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A 4 C665 2203 005005 C CER CHIP 100nF 10 16V X7R 1608 1 S A...

Page 14: ... 005437 C CER CHIP 10000nF 80 20 10V Y5V 3216 1 S N A 4 C372 2203 005437 C CER CHIP 10000nF 80 20 10V Y5V 3216 1 S N A 4 C403 2203 005437 C CER CHIP 10000nF 80 20 10V Y5V 3216 1 S N A 4 C405 2203 005437 C CER CHIP 10000nF 80 20 10V Y5V 3216 1 S N A 4 C433 2203 005437 C CER CHIP 10000nF 80 20 10V Y5V 3216 1 S N A 4 C438 2203 005437 C CER CHIP 10000nF 80 20 10V Y5V 3216 1 S N A 4 C439 2203 005437 C ...

Page 15: ...000nF 10 10V X5R TP 2012 1 S A 4 C806 2203 006361 C CER CHIP 10000nF 10 10V X5R TP 2012 1 S A 4 C807 2203 006361 C CER CHIP 10000nF 10 10V X5R TP 2012 1 S A 4 C808 2203 006361 C CER CHIP 10000nF 10 10V X5R TP 2012 1 S A 4 C809 2203 006361 C CER CHIP 10000nF 10 10V X5R TP 2012 1 S A 4 C447 2203 007176 C CER CHIP 10000nF 10 16V X5R TP 2012 1 S N A 4 C450 2203 007176 C CER CHIP 10000nF 10 16V X5R TP ...

Page 16: ...00mA DO 214AB 1 S A 2 M0006 BN96 09462A ASSY SHIELD P COVER LS19LFU SECC T0 8 1 S N A 3 AA63 00800A GASKET C SVP 50L7HX Conductive Fabric 1 S N A 3 BN61 02429D STUD PEM PNB M2 8 D7 L20 ZPC SIL SUM24L 1 S N A 3 T0103 BN61 05079A BRACKET FRAME LAPFIT SECC T0 8 1 S N A 3 M0131 BN63 04097A GASKET PEONY Conductive Fabric 1 mm 10 m 4 S N A 3 M0107 BN63 05342A SHIELD COVER LAPFIT SECC T0 8 1 S N A 2 6003...

Page 17: ...FLYER 01 QSG COMM SyncMaster W W 1 S N A 3 BN39 00397G CBF IF USB CABLE LAPFIT 4P 4P 2725 USB2 1 S A 3 BN68 02216C MANUAL FLYER INSTALLATION GUID comm Sync 1 S N A 0 1 M0003 BN92 04962K ASSY BOX LS19LFUGF8 XK 1 S N A 2 BN69 03473D BOX SET LAP FAT 18 5 CB A1 W503 D354 H9 1 S N A All manuals and user guides at all guides com ...

Page 18: ...n is blank check whether the power cord is connected correctly The circuits to check When the raster does not appear The Function PCB Main PCB I P PBA When 5V is generated but a blank screen is displayed Main PCB When 5V is not generated I P PBA Press the MENU button for more than five 5 seconds to return the monitor to factory reset 1 2 3 4 All manuals and user guides at all guides com ...

Page 19: ...art and also check whether there is any abnormal output at any of the other output terminals Diagnostics IC601 IC604 IC605 Main Board Front Yes Check the connection status for the function assy Yes Replace the IP board No When Pin 3 4 of CN601 is 0V Does proper DC 5V appear at Pin 5 6 of CN601 separately When Pin 1 of CN604 is DC 5V Does proper DC 3 3V appear at Pin 3 of CN604 Check the circuits r...

Page 20: ...4 3 4 Troubleshooting 4 2 1 Circuit diagrams when the power does not turn on All manuals and user guides at all guides com ...

Page 21: ... X202 Yes Check the signal cables and their connections Yes No Check input part No Check IC202 and related circuit No Check CN202 and related circuit Do output signals appear at pins 8 to 30 of CN202 No There are DC 5V at Pin 1 2 and 3 of CN202 Do the Hsync and Vsync waveforms appear at pins 32 33 of IC202 respectively Do the RGB inputs appear at R124 R127 and R131 Is X202 oscillating correctly Ch...

Page 22: ...4 5 4 Troubleshooting 4 3 1 When a blank screen is displayed All manuals and user guides at all guides com ...

Page 23: ...4 6 4 Troubleshooting 4 3 2 Waveforms when no screen is displayed All manuals and user guides at all guides com ...

Page 24: ...heck whether the USB driver is installed on the PC and the DL 120 IC301 driver is installed on the EEPROM IC302 correctly see also UBIsync Restrictions No Check whether the PC has recognized the USB display correctly using the Device Manager Are X202 and X301 oscillating correctly Check the circuits related to X202 and X301 No Yes Do the IC301 DVI_D 0 11 outputs appear correctly Check and replace ...

Page 25: ...ting 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 All manuals and user guides at all guides com ...

Page 26: ...4 9 4 Troubleshooting 4 4 2 Waveforms when a blank screen is displayed USB Input All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 27: ...the driver is installed correctly on the PC the newly installed device is displayed in the Device Manager window as shown in the figure to the right Identifying whether the driver is installed correctly Symptom When the monitor is turned on only a full white pattern is displayed continually regardless of the signals Cause This fault occurs when only the lamp power is supplied and no video signals ...

Page 28: ...rm after Replacing a Board 1 Check the PC color adjustment status 2 Input DDC input both of Analog and Digital 3 Check whether the appropriate MCU code for the model is input 4 Hard power the monitor off after entering service mode and performing a reset DDC EDIT Data Input 1 Use when updating the AD board code 2 Download the WinDDC program DDC Input program and Hex and DDC files appropriate to th...

Page 29: ... the SVC Function turn the pow er off 3 Safe Mode When the input signal is higher than the supported frequency of the product safe mode gives users some time one minute to change the video card settings to the Recommended Mode settings Service Mode Moving around 1 Each time the up button is pressed menu is selected Panel information Micom version Micom checksum Select the Auto Auto option Select t...

Page 30: ...g 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 No of the panel will increase by one 1 and the time information will change to 0 This number is incremented by 1 All manuals and user guides at all guides com ...

Page 31: ... Select a port 3 Open a DDC file 4 Select a date and click the OK Save button 5 Click the Next OK button 6 6 Enter the serial number and then press the Enter button When inputting digital data after inputting analog data repeat steps 2 to 5 1 2 3 4 5 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 32: ...owing 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 1 2 All manuals and user guides at all guides com ...

Page 33: ...4 16 4 Troubleshooting 3 Click the Auto Program button 4 When programming and verification are complete hard power the monitor off and then on again 3 All manuals and user guides at all guides com ...

Page 34: ...4 17 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 All manuals and user guides at all guides com ...

Page 35: ...hooting 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 All manuals and user guides at all guides com ...

Page 36: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram Main Board All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 37: ...ng Diagram IP Board LVDS Connector Connect to Panel IP Connector Connect to IP Board RGB Connector Connect to PC USB Input Connector Connect to PC Function Connector Connect to IP Board All manuals and user guides at all guides com ...

Page 38: ...ay occur CN1 Transmits input power of 90V to 263V to the power board Possible problems The No Power error may occur CN102 VGA signal input terminal Possible problems The No RGB Output error may occur CN3 Connects the function board and the main board Possible problems The No Power No LED Screen No OSD Operation and Abnormal OSD Operation errors may occur CN202 Transmits the LVDS signals from the m...

Page 39: ...6 4 6 Wiring Diagram Memo All manuals and user guides at all guides com ...

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