Electrical Malfunction - Samsung NZ63K7777BK Service Manual

4-4 Electrical Malfunction

Troubleshooting (Power)
Troubleshooting (Heating)
Check the relay terminal voltage
(220V~240V)
Check the all IGBT terminal resistance
(G-E, G-C, E-C)
Is there any shorted circuit?
Perform the 'PCB failure' process
This document can not be used without Samsung's authorization.
No Power
Check terminal block voltage.
(220V~240V, 50/60Hz)
YES
Check the wiring.
YES
Check the votage of PCB, SMPS
-input : 220V~240V
-output : 12V, 5V
YES
Replace the defected PCB.
Heating Failure
YES
Check the wiring.
YES
NO
Check the circuit breaker.
Check the terminal block connections
NO
Replace or Repair the wiring
NO
Repair the relay or missing circuit
component.
NO
Replace or Repair the wiring
NO
Check Fuse at Filter PCB.
Normally, If IGBT is damaged
and shorted, Fuse will blow and
YES
power off.
1. Replace the Fuse at Filter PCB.
If not change Fuse, Repaired Inverter
PCB will damage again.
2. Replace the Inverter PCB.
- 28 -