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 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 red color? Yes Does proper DC 13V No Change a Assy PCB Power. appear at JP845? Yes Does proper DC A3.3V, No Check a IC1112, Q1103. A5V appear at Change a main PCB ass'y. C854, C1166_LCD? Yes Does proper DC 5V, 3.3V, No 1.2V appear at C1153, C1178, Check a IC1111, IC1102, IC1113. C1170? 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. TIP: How to drive the circuit by force when LCD panel Lamp is faulty. - It is available to drive the circuit when the pin of 2 in Main_Power_control CN1101 connect the pin of 4. 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 C2078,C2077,C2079(R, G, B) of IC2001? cable. Change a main PCB ass'y. Yes Does the digital data appear No Check a IC2001 at the output of Change a main PCB ass'y. LVDS (RA2008~2013)? Yes Check a LVDS cable? No Replace a lcd panel? Please, Call to Samsung Co. LTD. 4-3 4 Troubleshooting WAVEFORMS