Amana RFS Models Service Manual page 31

Troubleshooting
TROUBLE 5: No microwave oscillation even though oven lamp and blower motor run.
(Display operates properly)
CONDITION
No microwave
oscillation.
Output is full power
when you set lower
power level.
2011 RFS Training Manual.indd 29
CHECK RESULT
Disconnect the
No continuity.
wire leads from
relay 3 and check
continuity of relay 3
Continuity.
(Operate the unit)
Check high vol-
Abnormal
tage transformer
Normal
Check high vol-
Abnormal
tage capacitor
Normal
Check high vol-
Abnormal
tage diode
Normal
Check
Abnormal
magnetron.
Disconnect the
Abnormal.
wire leads from
relay 3 and check
continuity of relay 3
(Operate the unit)
CAUSE
Defective PCB
assembly
Defective high
voltage
transformer.
Defective high
voltage capacitor.
Defective high
voltage diode.
Defective
magnetron.
Defective PCB
assembly.
29
REMEDY
Replace PCB
assembly
Replace high
voltage
transformer.
Replace high
voltage capacitor.
Replace high
voltage diode.
Replace
magnetron.
Replace PCB
assembly.
10/3/2011 8:36:49 AM