Service manual

50
(TROUBLE 5) No microwave oscillation even though fan motor rotates.
Condition Check Result Cause Remedy
No microwave
oscillation
Check continuity of
connecting wire of
magnetron
No
Continuity
Continuity
Defective magnetron
Replace
Check continuity of
filament terminal of
high voltage
transformer
No
Continuity
Continuity
Defective high voltage
transformer,
Replace
Check the diode for
continuity in the
reverse and normal
directions
Continuity
in the
reverse
direction
Good
Defective high voltage
diode
Replace
Defective magnetron
Replace