Daewoo KOG-361Q, Service Manual, Page: 34 / 58

(TROUBLE 5) No microwave oscillation even though fan motor rotates.
33
Check Result
Cause Cause
Replace
Check continuity
of primary wind-
ing
of high voltage
transformer and
touch control
circuit
Condition
Turn table
motor,
fan motor and
oven lamp turn
on for a
second when
the start pad
is tapped
No
Conntinuity
Open winding
Replace
Normal
Defective touch
control circuit
Check Result
Cause Cause
Check continuity
of connecting wire
of magnetron.
Condition
No
microwave
oscillation
Continuity
Replace
Check the isolation
of filament winding
of high voltage
transformer No
Good
Defective
high voltage
transformer
Replace
Good
No
Continuity
Defective
magnetron
Replace
Check continuity
of filament of
magnetron. No
Continuity Defective
magnetron
Replace
Check continuity
of filament terminal
of high voltage
transformer No
Continuity
Defective
high voltage
transformer
Replace
Check the diode
for continuity
in the reverse
and normal
directions Continuity
in the
reverse
direction
Defective
high voltage
diode
Continuity
Continuity