When Power Is Not Applied - Samsung RF31FM Series Manual

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6. Self Diagnosis & Trouble Shooting

6-6. When Power is not applied

[Caution]
There is Over AC 115V and DC
310V at the Inverter PCB Power
Circuit. So,be cautious when
repairing the unit or measuring
values..
Start
Is FUSE on PCB
Down?
NO
Is DC 300V
applied between both
ends of BD1+,-?
YES
IS DC 13.2V applied
to C121?
NO
IS DC 15V applied to
C108?
YES
- To check the Inverter PCB, refer to the
Operation and'Refer' sections in this
manual
YES
Replace Fuse AC 250V 6.3A
NO
Replace the Inverter PCB
YES
Replace the Inverter PCB
NO
Replace REG1(7815)
To do list
188