Samsung PPM63M7FS Service Manual page 23

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 power of the unit seems to be out of order.
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:
Major - Check the internal cable connection.
Checklist - Check the fuses.
- Check the output voltages of the SMPS.
- Replace the Main Board.
①
Troubleshooting
Procedures
4-2
①
Are the AC IN socket connector and the
Main SMPS CN800 connected?
Yes
①
Is the Fuse (F801S) of the Main SMPS
Power Input Part blown?
Yes
②
Main SMPS CN801 Pin 3 : STB 5V Pin 1
PS-ON : Check to see if it is 0V
Yes
Replace the Main Board
The AC IN socket
No
connector and the Main SMPS
CN801 connected
No
Replace Fuse (F801S)
No
Replace the Main SMPS
②
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