Samsung troubleshooting 625 free download

File name troubleshooting_625.pdf

Troubleshooting 6. Troubleshooting 6-1 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. Samsung Electronics 6-1 Troubleshooting 6-2 Checkpoints by Error Mode 6-2-1 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 power of the unit seems to be out of order. The SMPS relay or the LEDs on the front panel do not work when connecting the power cord if the cables are improperly connected or the Video Board or SMPS is out of order. In this case, check the following: - Check the internal cable connection status inside the unit. Major Checklist - Check the fuses of each part. - Check the output voltage of SMPS. - Replace the Video Board. Troubleshooting Procedures Are 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 SMPS No Power Input Part blown? Replace Fuse (F801S) Yes Main SMPS CN804-2 No Pin 3: STB 5V Replace the Main SMPS Pin 5 PS-ON: Check to see if it is 0V Yes No Replace the Main Board Replace the Digital Board 6-2 Samsung Electronics Troubleshooting 6-2-2 When the unit is repeatedly turned on and off Symptom - The SMPS relay is repeatedly turned on and off.