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Microwave Circuit
9-8
MAGNETRON TESTING
WARNING!!
The microwave circuit cannot be worked
on with the unit on. The unit must be
disconnected from the power source.
Failure to do so could result in injury or
death.
WARNING!!
The HV Capacitor must be discharged
before proceeding.
Checking a Magnetron for Open or Shorted
Filaments:
1. Disconnect the AC power source and
discharge the High Voltage Capacitors.
2. Isolate the magnetron from the circuit by
removing the wires from the F and FA
terminals.
3. An ohmmeter connected between the filament
terminals (F, FA) should indicate a reading of
less than 1 Ohm.
4. A continuity check between either filament
terminal and the magnetron chassis should
indicate an infinite resistance (open).
MAGNETRON REMOVAL AND REPLACEMENT
1. Remove door hinge bar support angle.
2. Remove magnetron cooling fan, duct work and
magnetron as an assembly.
3. Unplug and remove magnetron.
4. Install new magnetron.
5. Check the oven for microwave leakage. Refer
to page 6-1 for instructions.
Door
Hinge Bar
Support Angle
Magnetron Cooling Fan
Magnetron
View A
See View A
FIGURE 6 - 3 Magnetron Removal and Replacement