Samsung DMR78AHS/XAC Service Manual page 49

Error type Error mode
Power error None
4-11
Checking Method
1. Check the connections for the power plug.
2. Check the voltage of the power outlet.
Nomral: AC 120V
➢
3. If there is a fuse in the right side of the base, check
whether the fuse is broken.
4. Check the wires of the Main PBA power part.
- Measure the voltage between the black wire
and the white wire of CN1.
Nomral: AC 120V
➢
New PBA
4-1.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
➢
5. Check the DC voltage of the Main PBA.
Corrective actions
- Reconnect the power plug.
- Connect to a 120V power source.
- Replace the fuse (15A).
- Faulty: Check and replace the wires of the power part.
- See "Main PBA DC voltage error".
4. Troubleshooting
New PBA