LG MS-2544B - No Microwave Oscillation; Checking Components for No Oscillation

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