Capacitor And Diode - GE Advantium PSA2200R Technical Service Manual

Metal Shield
Note: The 2 front screws are recessed from the top
of the metal shield. Access holes are provided. A
magnetic screwdriver is necessary to capture these
screws.
5. Grasp the Magnetron, then remove and capture
the 2 front screws.
6. Carefully remove the Magnetron from the oven.
Metal Shield
– 62 –

Capacitor and Diode

Capacitor
• 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.
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¿ nity.
Capacitor - Discharge capacitor, then ohm out both
terminals and each terminal to the capacitor case.
All readings should be in¿ nite or very high.
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. It is necessary to remove the lower blower
motor to access the capacitor strap and diode
screws. (See
Lower Blower Motor
Before disconnecting the wires and diode from the
capacitor, note the locations. The wire and diode
connectors are ¿ rmly attached and DO NOT use
releasing locking tabs.
Diode
.)
.)
(Continued Next Page)