Samsung NZ63K7777BK Service Manual page 31

4-4 Electrical Malfunction
Troubleshooting (PCB failure)
PCB Failure
- Check the input voltage of
PCB SMPS (input check-
point : 220V~240V )
- Check the output voltage of
PCB SMPS (Output check-
point : 5V/12V )
Do all relays operate?
Check the Assy-Inverter Module & Assy Touch PCB's
input voltage(5V,12V,GND)
Replace PCB
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- Check Terminal block
NO
YES
NO
YES
NO
YES
YES
voltage(220V~240V).
NO
Reset the circuit braker or
check main power.
Replace PCB
Repair the relay or replace
PCB.
NO
- 29 -
YES
Repair Faulty wiring
or PCB check
Replace or Repair the wiring