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(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run.
(Display operates properly)
CONDITION
No microwave
oscillation.
Check high vol-
tage capacitor.
Check high vol-
tage diode.
Check
magnetron.
CHECK
Disconnect the
No continuity.
wire leads from
relay 2 and
check continuity
Continuity.
of relay 2.
(Operate the unit)
Check high vol-
Abnormal
tage transformer.
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
RESULT
Defective PCB
assembly.
Defective high
voltage
transformer.
Defective high
voltage capacitor.
Defective high
voltage diode.
Defective
magnetron.
5-16
CAUSE
REMEDY
Replace PCB
assembly.
Replace high
voltage
transformer.
Replace high
voltage capacitor.
Replace high
voltage diode.
Replace
magnetron.
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