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 inju ry or
death.
WARNING!!
The HV Capacitor must be discharged
before proceeding.
Checking a M agnetron 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 c heck between either filam ent
terminal and the magnetron chassis shou ld
indicate an infinite resistance (open).
MAGNETRON REMOVAL AND REPLACEMENT 1. Remove door hinge bar support angle.
2. Remove m agnetron cooling fan, duct work and
magnetron as an assembly.
3. Unplug and rem ove magnetron.
4. Install new magnetron.
5. Check the oven f or 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