Daewoo KOG-37050P Service Manual page 20

Does the fan motor work when you shut
the door and turn the timer?
YES
Does the oven lamp light?
Does the turntable turn?
YES
If microwave do not oscillate,
check continuity of filament
of magnetron.
Poor continuity
Check the isolation of
filament winding of high
voltage transformer.
Good
NO
Normal
reading should
be approx. 0Ω
NO
Continuity
Check continuity filament
tap (3.3V) of high voltage.
Check the diode for
continuity in the reverse and
normal directions.
Meter with 6V or higher
voltage batteries should
be used to check the normal
direction resistance of
the diode.
NO Good
NO Continuity
Continuity
Continuity in
the reverse
direction.
Continuity
19
TROUBLE SHOOTING GUIDE
Replace or repair oven lamp,
turntable motor.
Replace high
voltage
transformer.
Replace high
voltage diode.
Replace
magnetron.
Replace high
voltage
transformer.
Replace
magnetron.