KitchenAid Architect Series KBMS1454R, Technical Education, Page: 52 / 68

5-6
WARNING
Electrical Shock Hazard
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
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.
Primary
Terminals
Filament
White
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).
MAGNETRON
Filament Terminals