Samsung DMT300 Series Training Manual page 43

Trouble Shooting
Error Type Error Mode
Power Error None
Main-PBA DC None
Voltage Error
Checking Method
1. Check the connections for the power plug.
2. Check the voltage of the power outlet.
➢ Normal: AC 120V
3.Check the wires of the Main PBA power part.
- Measure the voltage between the black wire and the
white wire of CN101.
➢ Normal: AC 120V
4. Check the DC voltage of the Main PBA.
Check the DC voltage of the Main PBA.
- Measure the voltage between pin 6 (amber) of the
main PBA CN302 connector and pin 7 (pink) of the
CN302 connector.
➢ Normal: 4.5V to 5.5V
- Measure the voltage between pin 6 (amber) of the
main PBA CN302 connector and pin 9 (white) of the
CN302 connector.
➢ Normal (Power Key On): 9.5V to 12.5V
➢ Normal (Power Key Off): 5.5V to 7.0V
Corrective actions
- Reconnect the power plug.
- Connect to a 120V power source.
-Faulty: Check and replace the wires of the power part.
- Remove Retainer.
- Check voltage
- See "Main PBA DC voltage error".
-Faulty: Replace the Main-PBA Assy.
- Remove Retainer.
- Check voltage (4.5V~5.5V) - Check voltage (9.5V~12.5V or
5.5V~7.0V)