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R1900M
5 – 1
R1900M
Service Manual
CHAPTER 5.
TROUBLESHOOTING GUIDE
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.
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 fuse F10, check the monitor switches (1), (2), primary interlock relay RY1, door sensing switch
and secondary interlock switches (1), (2), before replacing the fuse F10.
and secondary interlock switches (1), (2), before replacing the fuse F10.
Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.
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