High Voltage Transformer; High Voltage Diode - KitchenAid KOMS155MBL Technical Education

Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.

HIGH VOLTAGE TRANSFORMER

Primary Terminals
Filament Terminals
Refer to page 4-15 for the procedure for servic-
ing the high voltage transformer.
1. Unplug microwave oven or disconnect
power.
2. Discharge the high voltage capacitor
terminals with a 20,000
chassis ground.
3. Disconnect the filament wires, and the
wires from the primary and secondary
terminals.
4. Set the ohmmeter to the R x 1 scale.
5. Touch the ohmmeter test leads to the
primary terminals. The meter should indi-
cate less than 1 Ω.
6. Touch the ohmmeter test leads to the
filament terminals. The meter should indi-
cate less than 1 Ω.
7. Touch one ohmmeter test lead to the
secondary terminal and the other test lead
to the chassis. The meter should indicate
between 60 and 80 Ω.
WARNING
Electrical Shock Hazard

HIGH VOLTAGE DIODE

Secondary
Terminal
Refer to page 4-12 for the procedure for servic-
ing the high voltage diode.
1.
2.
3.
Ω
4.
resistor to
5.
6.
5-5
–
–
+
Unplug microwave oven or disconnect
power.
Discharge the high voltage capacitor
terminals with a 20,000
chassis ground.
Disconnect the diode wire connector from
the filament terminal on the magnetron.
Set the ohmmeter to the R x 10K scale.
Touch the black (–) ohmmeter test lead to
the ground screw and the red (+) test lead
to the lead end of the diode. The meter
should indicate approximately 40 KΩ.
Reverse the ohmmeter test leads, and the
meter should indicate infinity (∞).
+
Ω
resistor to