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Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is con-
nected.
When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many
of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter
which will be found in the "Test Procedure "section.
IMPORTANT: If the oven becomes inoperative because of a blown C/T fuse, check the monitor switch, relay (RY) sec-
ondary interlock relay (RY2), door sensing switch , primary interlock switch and third door switch before
replacing the C/T fuse. If C/T fuse is replaced, the monitor switch and primary interlock switch must also
be replaced. Use part FFS-BA09/KiT as an assembly.
IMPORTANT: Whenever troubleshooting is performed with the power supply cord disconnected. It may in, some cases,
be necessary to connect the power supply cord after the outer case has been removed, in this event,
. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulation
tape.
6. After that procedure, reconnect the power supply cord.
When the testing is completed
. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power transformer.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is installed.
TROUBLESHOOTING GUIDE
5
C F M V 1 5 6 D B D
C F M V 1 5 6 D S D
C F M V 1 5 6 D C E
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