Samsung MW73VR - Oven Non-Operation Troubleshooting

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4. Troubleshooting
Is Fuse OK?
*Inspection method
Power supply circuit check point
Relay control circuit check point
Oven does not operate.
Is the magnetron
temperature switch normal?
Is SMPS power supply
cirduit normal?
NO NO
Is Primary interlock
switch normal?
Is Power Relay normal?
YES
YES
YES
YES
YES
YES
NO
NO
NO
YES
NO
NO
Replace switch
Do check power supply
circuit
Do check
Relay control circuit
Is high voltage dioed
normal?
Is high voltage dioed
normal?
Is high voltage
capacitor normal?
Is magnetron normal?
NO
Is the IC01 output of
PCB normal?
NO
NO
Checking high
voltagecircuts
NO
NO
4-3-14 If oven malfunction