ACP RFS12MPSB Service Manual page 13

Troubleshooting Procedures
TROUBLE 5: No microwave oscillation even though oven lamp and blower motor run.
(Display operates properly)
CONDITION
No microwave
oscillation.
NOTE : • Make sure the wire leads are in the correct position.
• When Removing the wire leads from the parts, be sure to grasp the connector, not the wires.
• When removing the magnetron, be sure to install the magnetron gasket in the correct position
and in good condition.
Output is full power
when you set lower
power level.
©2010 ACP, Inc.
CHECK
Disconnect the
No continuity.
wire leads from
relay 3,5 and check
continuity of relay 3,5
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
wire leads from
relay 3,5 and check
continuity of relay 3,5
(Operate the unit)
16400007 Rev. 0
RESULT
Defective PCB
assembly
Defective high
voltage
transformer.
Defective high
voltage capacitor.
Defective high
voltage diode.
Defective
magnetron.
Defective PCB
Abnormal.
assembly.
CAUSE REMEDY
Replace PCB
assembly
Replace high
voltage
transformer.
Replace high
voltage capacitor.
Replace high
voltage diode.
Replace
magnetron.
Replace PCB
assembly.
13