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File name 20061202080759781_4_troubleshooting.pdf

4 Troubleshooting 4 Troubleshooting 4-1 Common Acknowledge - If you change the interface board, be sure that the U105, U106 and U103 these three components also changed to the new I/F board because there was program inside. If not, please re-write EDID or upload firmware into Flash memory via VGA Cable. - If you adjust clock and phase, please do it at the condition of Windows shut down pattern. - If you confirm the R.G.B. color is normal or not, please do it under 16-grey scalar pattern. - This LCM is analog interface. So if the entire screen is an abnormal color that means the problem happen in the analog circuit part, if only some scale appears abnormal color that stand the problem happen in the digital circuit part. - If you check the H/V position, please use the crosshatch pattern. - This LCM support more than 30 timing modes, if the input timing mode is out of specification, the picture may appears abnormally. - If brightness uneven, repairs Inverter circuit or change a new panel. - If you find the vertical line or horizontal line lost on the screen, please change panel. 4-1 4 Troubleshooting 4-2 No Power & Power LED Off No power Check primary rectifier voltage Check circuit if short Check IC802, C805, T801 Check F801, P801, D801 Check pin3 of IC802 voltage about 1V Check R801, R805, R822, R823, R817 Check pin2 of IC802 voltage about 2V Check R803, R807, R824, R825 Check pin1 of IC802 voltage is 5.8V Check R812, R816, C818 END 4-2 4 Troubleshooting 4-3 DC output voltage is unstable Output Voltage Unstable Check Vbe of Q801 below Check circuit if short Check ZD801, ZD802, ZD803, D803, D805 Check Q801, Q802 Check reference voltage Check pins of IC801 Check R801, R805, R822, R823, R817 Check R810, R811 Check feedback circuit Check Vpin3-4 of IC801 about 6V Check C815, D806, R812 Check Vpin1-2 of IC801 about Check C815, D806, R812 END 4-3 4 Troubleshooting 4-4 Output power is unstable Unstable power Check sampling Circuit Check R810, R811, R818 Change R810, R811, R818 Check the R pin voltage of IC803 about 2.5V Check the C pin voltage of IC803 if 3V Change IC803 Check R809, R808, R814, D809 Check pin1 of IC802 voltage is 5.8V Check D806, C815 if short Change D806, C815 Check pin3 of IC802 voltage about 1V Change R801, R805, R822, R823, R817 END 4-4 4 Troubleshooting 4-5 Backlight can't be turned on No backlight Yes No LED lamp is OK Yes No power supply to inverter Check the cable that from I/F BD to P/I BD is ok Yes Is there 14V voltage on pin 3,4 of T501, T502 Yes Is there PWM signal on pin 4 of IC501 Yes Is there High level voltage on pin4 of IC501 Yes No Lamp connector opened No Check I/F BD No Check I/F BD No U501, U502 fail No Check power supply Replace U501, U502 Vsense voltage 2.9V No Are there PWM signal on pin1, pin15 of IC501 Yes Pin 5 of IC501 voltage is Low level Yes Pin 5 of IC501 voltage is high level voltage No IC501 failure Yes Feedback circuit failure Yes Check R523, D504

File name 20061202080759781_6_partslist_A4.pdf

6 Electrical Parts List 6 Electrical Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 6-1 Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA 0.1 0.1 0.1 0.1 0.1 0.1 0.1 M0215 BN07-00220A 5010202070 BN81-00356A 7140300053 BN82-00161A 7000000002 BN82-00166A 7906113000 BN82-00177A 7906114000 BN82-00178A 7906115000 BN82-00179A LCD-PANEL;CLAA170EA07Q,Matisses,6Bit,358 A/S-COVER,BACK;BLACK,W/DVI, LE1939,-,-,A/S MATERIAL ASSY-BEZEL(S);LE1729,-,-,-, A/S MATERIAL ASSY-PCB&RIVENT;LE1729,-,-, A/S MATERIAL ASSY-PCBA IF BOAR;LE1729-0E A/S MATERIAL ASSY-POWER INVERT;LE1729-6E A/S MATERIAL ASSY-KEYPAD BOARD;LE1729 1 1 1 1 1 1 1 6-1 6 Electrical Parts List Memo 6-2

File name 20061202080759781_9_schematic-A3.pdf

9 Schematic Diagrams 9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-1 DC-DC 9-1 9 Schematic Diagrams 9-2 INPUT 9-2 9 Schematic Diagrams 9-3 TSUM16AL 9-3 9 Schematic Diagrams 9-4 POWER 9-4 9 Schematic Diagrams 9-5 INVERTER 9-5 9 Schematic Diagrams 9-6 KEYPAD 9-6