Samsung 09 Troubleshooting free download

File name 09_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 Main Board. 3. Check the voltage in and out between the SMPS Main Board, between the SMPS INVERTER Board, and between the Main LVDS 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 blue color? Yes Does proper DC 12V No Change a Assy PCB Power. appear at CM801? Yes Does proper DC A3.3V, No Check a IC1008, IC1004. A5V appear at Change a main PCB ass'y. C1059, C1167? Yes Does proper DC 5V, 3.3V, No 1.9V appear at C1015, C1194, Check a IC1015, IC812, IC1002, IC606, C6026? IC818. 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) 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 #30, 22, 38(R, G, B) of IC4001? cable. Change a main PCB ass'y. Yes Does the digital data appear No Check IC4001 at the input of Change a main PCB ass'y. LBE (RA6053~5)? Yes Does the digital data appear No at the output of IC4003 Check IC4003 (RA6019_120Hz~6021_120Hz)? Change a main PCB ass'y. Yes Does the digital data appear at the input of IC6003, 6004 No (RA6001_120Hz~RA6003_120Hz, Check IC6005 RA6005_120Hz, RA6009_120Hz, Change a main PCB ass'y. RA6016_120Hz, RA6018_120Hz)?