Samsung Troubleshooting free download

File name Troubleshooting.pdf

Troubleshooting 4.Troubleshooting 4-1 CheckpointsbyErrorMode...4-2 4-2 MeasurestobetakenwhentheProtectionCircuitoperates...4-18 4-3 Initialization&UpgradeMethods...4-20 . Samsung Electronics 4-1 Troubleshooting 4-1 CheckpointsbyErrorMode OscilloscopeSettingValues Voltage/DIV 2V/div TIME/DIV 100ms/div 4-1-1 PowerFailure The power does not turn on. UIC1 Main PCB; No Check if the No pin 14, 40, 55 and 89 of 5V? C18 of the POWER PCB (SMPS) is +5.6V. Yes Yes Replace the CN2 Connector/ Check the power circuit of the Wire of SMPS. SMPS PCB (Check if the outputs of FUSE: F1, IC: U1 and TRANS: T1 are measured.) Check if the Check if the No No MAIN PCB POWER-SENSE is 5V. output voltages of ZD2 or R16 of (Check the pin 22 of UIC1) SMPS are 5V. Yes Yes Check the pattern of the pin 22 Modify ZD2/ Measure the of UIC1 of CN2 of the SMPS. resistance between the pin 22 and GND of Micom (UIC1). If the resistance is 0 Ohm, replace the UIC1. Check if the No pin 26 of UIC1 is 5V when the MAIN Replace the Micom (UIC1). PCB is turned on. B 4-2 Samsung Electronics Troubleshooting B Check if the No Check if the pin 5 and 6 of pin 5 and 6 of SWA2 of MAIN PCB the CN3 of t