Samsung Troubleshooting free download

File name Troubleshooting.pdf

Troubleshooting 4. Troubleshooting 4-1 Troubleshooting 4-1-1 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 or loose cable connection. - 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 X, Y Main Board, and between the Logic Boards. Samsung Electronics 4-1 Troubleshooting 4-1-2 Checkpoints by Error Mode No Power - The LEDs on the front panel do not work when connecting the power cord. Symptom - The SMPS relay does not work when connecting the power cord. - The unit appears to be dead. The SMPS relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning. In this case, check the following: - Check the internal cable connection. Major Checklist - Check the fuses. - Check the output voltage of the SMPS. - Replace the Main Board. Troubleshooting Procedures Is the AC IN socket connector and No The AC IN socket connector and the Main SMPS CN800 connected? the Main SMPS CN800 connected Yes Is the Fuse (F801S) of the Main Yes SMPS Power Input Part blown? Replace Fuse (F801S) Yes CN801 No Check the STD5V vOLTAGE Check PS_ON voltage if it is 0V Replace the Main SMPS Yes Replace the Main Board 4-2 Samsung Electronics Troubleshooting When the unit is repeatedly turning on and off Symptom - The SMPS relay is repeatedly turning on and off. In general, the SMPS re