Samsung Troubleshooting free download

File name Troubleshooting.pdf

4 Troubleshooting 4 Troubleshooting 4-1 First Checklist for Troubleshooting 1. Check the various cable connections first. - Check to see if there is a burnt or damaged cable. - Check to see if there is a disconnected cable connection or a connection is too loose. - Check to see if the cables are connected according to the connection diagram. 2. Check the power input to the Video Board. 3. Check the voltage in and out between the SMPS Video Board, between the SMPS X, Y Drive Board, and between the Logic Boards. 4-1 4 Troubleshooting 4-2 Checkpoints by Error Mode 4-2-1 No Power LAMP off, power indicator No Check a connection a power cable. LED red color? Yes Does proper DC 12V No Change a Assy PCB Power. appear at C801, C807? Yes Does proper DC A3.3V, No Check a IC812, IC801. A5V appear at Change a main PCB ass'y. C865, C863? Yes Does proper DC 5V, 3.3V, No 1.9V appear at C870, C861, Check a IC813, IC811, IC807. C847? Change a main PCB ass'y. Yes No Check a other function. A power is supplied to set? (No picture part) Replace a lcd panel. 4-2 4 Troubleshooting 4-2-2 No Video (Analog PC Signal) Power Indicator is off. Lamp on, no video. Yes Check a PC source and check No Input a analog PC signal and the connection of DSUB cable? connected cable(DPMS). Yes Does the signal appear at No PC cable. Change a PC 1 #3, 5, 7(R, G, B) of IC906? cable. Change a main PCB ass'y. Yes Does the signal appear at No Check a IC906. 1 #21,19,15(R,G,B)of IC906? Change a main PCB ass'y. Yes Does the digital data appear No Check a IC312. 2 at output of Change a main PCB ass'y. DIN(0:23)of IC312? Yes Does the digital data appear at No Check a IC201. 3 output of Change a main PCB ass'y. LVDS TX(FT250~253)? Yes Check a LVDS cable? No Replace a lcd panel? Please, Cal