– 65 –
• Location
(See
Right Side View
.)
• The diode works along with the capacitor to
effectively double the already-high voltage
that is provided by the power transformer. This
voltage, approximately 3000 - 5000 VDC , is
applied to the Magnetron tube, causing it to
produce the microwave energy that cooks the
food.
• Disassembly.
(See
Disassembly
.)
Troubleshooting
Diode - Check resistance of the diode using a meter
operated by a 9-volt battery. Put the red lead on the
positive side of the diode and the black lead on the
negative side of the diode. Meter should read low
resistance. Reverse the leads and meter should read
in
fi
nity.
Capacitor - Discharge capacitor, then check
resistance of both terminals and each terminal to
the capacitor case. All readings should be in
fi
nite or
very high.
Disassembly
To remove the capacitor or diode:
The capacitor is held in place with a bracket
attached to the air guide with a tab and a Phillips-
head screw. The diode is connected to the capacitor
and attached to the air guide with a Phillips-head
screw.
Capacitor and Diode
Before disconnecting the wires and diode from the
capacitor, note the locations. The wire and diode
connectors are
fi
rmly attached and DO NOT use
releasing locking tabs.
WARNING:
Always be certain the capacitor is
discharged before servicing. Use electrician's
discharge pliers and electrician's gloves under
Kevlar gloves (or equivalent protective gloves) when
discharging the capacitor. Place the pliers between
the diode connection of the capacitor and the oven
chassis ground.
Note:
The capacitor has an internal discharge
resistor that automatically discharges the capacitor
when the oven turns off. Under normal operation,
capacitor should fully discharge within 30 seconds.
Diode Screw
Capacitor Bracket Screw
Bracket
Air Guide
Diode
Capacitor
