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Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
AC LINE FILTER
Refer to page 4-12 for the procedure for ac-
cessing the AC line filter.
1.
Unplug microwave oven or disconnect
power.
2.
Discharge the AC line filter by touching
the leads of a 20,000 Ω resistor from each
of the filter leads to the chassis ground.
3.
Disconnect the AC line filter wires from the
filter terminals.
4.
Set the ohmmeter to the R x 1 scale.
5.
Touch the ohmmeter test leads to the fol-
lowing AC line filter terminals:
1 to 3 (coil) = less than 1 Ω.
2 to 4 (coil) = less than 1 Ω.
6.
Set the ohmmeter to the R x 10K scale.
7.
Touch the ohmmeter test leads to AC line
filter terminals 3 and 4 (resistor). The me-
ter should indicate between 550 K and
800 KΩ.
WARNING
Electrical Shock Hazard
DOOR INTERLOCK SWITCHES
3
4
2
5
1
Refer to page 4-16 for the procedure for
accessing the door interlock switches.
1.
2.
3.
4.
5.
NOTE: Pressing the actuator button on the
switches should result in opposite read-
ings (normally open should read closed, and
normally closed should read open).
5-
Unplug microwave oven or disconnect
power.
Disconnect the wires from the interlock
switch terminals.
Set the ohmmeter to the R x 1 scale.
Touch the ohmmeter test leads to the ter-
minals of the primary or secondary switch
(normally open). The meter should indi-
cate an open (infinite) circuit.
Touch the ohmmeter test leads to
the terminals of the monitor switch
(normally closed). The meter should indi-
cate a closed (0 Ω) circuit.
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