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(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run
(Display operates properly)
CONDITION
No microwave
oscillation.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECK
Disconnect the
No continuity.
wire leads from
relay 2 and
check continuity
Continuity.
of relay2.
(Operate the
unit)
Check H.V.
Abnormal
transformer.
normal
Check H.V.
Abnormal
capacitor.
normal
Check H.V.
Abnormal
diode.
normal
Check
Abnormal
Magnetron.
RESULT
Defective P.C.B
assembly
Defective high
voltage
transformer.
Defective high
voltage capacitor.
Defective high
voltage Diode.
Defective
magnetron.
5-16
CAUSE
REMEDY
Replace P.C.B
assembly
Replace high
voltage
transformer .
Replace high
voltage capacitor.
Replace high
voltage Diode.
Replace
magnetron .
LGE Internal Use Only
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