LG MS-2344B Service Manual page 25

(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run.
(Display operates properly)
CONDITION
No microwave
oscillation.
CHECK
Disconnect the
wire leads from
relay 2 and
check continuity
of relay2.
(Operate the unit)
Check circuit
protector.
Check high vol-
tage transformer.
Check high vol-
tage capacitor.
Check high vol-
tage diode.
Check
magnetron.
RESULT
No continuity.
Continuity.
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
5-15
CAUSE
Defective PCB
assembly.
Defective circuit
protector.
Defective high
voltage
transformer.
Defective high
voltage capacitor.
Defective high
voltage diode.
Defective
magnetron.
REMEDY
Replace PCB
assembly.
Replace circuit
protector.
Replace high
voltage
transformer.
Replace high
voltage capacitor.
Replace high
voltage diode.
Replace
magnetron.