Daewoo KOT-123Q0A Service Manual page 25

TROUBLESHOOTING GUIDE
(TROUBLE 3) No microwave oscillation even though fan motor rotates.
CONDITION
No microwave
oscillation
CHECK
Check continuity of
connecting wire
of magnetron.
Check the isolation
of filament winding
transformer
Check continuity of
filament of
magnetron
Check continuity of
filament terminal
of high voltage
transformer
Check the diode
for continuity
and
normal directions
RESULT CAUSE
Continuity
Defective
No good
high voltage
transformer
Good
Defective
magnetron
No
Continuity
No Defective
Continuity magnetron
Continuity
No Defective
Continuity high voltage
transformer
Continuity
Continuity Defective
in the reverse high voltage
direction diode
24
REMEDY
Replace
Replace
Replace.
Replace.
Replace.