Daewoo KOG-36852S Service Manual page 24

2)
Does the fan motor when you shut the door and turn the timer?
YES
Does the oven lamp light?
Does the turntable turn?
YES
NO microwave
oscillation.
operate
Check continuity
of filament of
magnetron.
Poor
continuity
Check the relay
contact of slow
acting relay ass'y
*After short the contacts of a relay, operate oven.
Check continuity
of filament of
magnetron
*Do not operate when you check this continuity.
Check continuity fil-
ament tap (3.3V) of high
NO
voltage transformer.
continuity
*Normal reading should be approx. 0Ω.
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
Check the isolation of
filament winding of high
voltage transformer
GOOD
Faulty magnetron
NO
NO
operate
NO
continuity
NO
continuity
continuity
in the
reverse
direction
24
Replace or repair
oven lamp,
turntable motor.
Replace
slow acting
relay ass'y
Replace
magnetorn
Replace
high voltage
transformer
Replace
high voltage
diode.
Replace high voltage
transformer
Replace
Magnetron