Magnetron; High Voltage Transformer - KitchenAid KBMS1454R Technical Education

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

MAGNETRON

Refer to page 4-15 for the procedure for ac-
cessing the magnetron.
1. Unplug microwave oven or disconnect
power.
2. Discharge the high voltage capacitor
using a 20,000 Ω resistor from the ter-
minals to chassis ground.
3. Disconnect the wire connector from the
filament terminals.
4. Set the ohmmeter to the R x 1 scale.
5. Touch the ohmmeter test leads to the
filament terminals. The meter should indi-
cate less than 1 Ω.
6. Touch one ohmmeter test lead to the
chassis and the other to each of the fila-
ment terminals. The meter should indicate
an open circuit (infinite).
Filament Terminals
WARNING
Electrical Shock Hazard

HIGH VOLTAGE TRANSFORMER

Primary
Terminals
Refer to page 4-17 for the procedure for ac-
cessing the high voltage transformer.
1. Unplug microwave oven or disconnect
power.
2. Disconnect the high voltage transformer
wires from the magnetron and high volt-
age capacitor terminals.
3. Set the ohmmeter to the R x 1 scale.
4. Touch the ohmmeter test leads to the two
primary terminals. The meter should indi-
cate less than 1 Ω.
5. Touch one ohmmeter test lead to the white
secondary wire terminal and the other test
lead to the transformer chassis ground
lug. The meter should indicate approxi-
mately 75 Ω.
6. Touch the ohmmeter test leads to the two
red-black filament terminals. The meter
should indicate 0 Ω.
7. Set the ohmmeter to the R x 1K scale.
8. Touch one ohmmeter test lead to the
transformer chassis ground lug. Touch
the other test lead to each of the filament
terminals. The meter should indicate infin-
ity at both terminals.
5-6
White
Filament