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Microwave Oven Lamp Assembly
The microwave must be removed from the oven to
service the oven lamp assembly.
The oven lamp assembly is located in the air duct
at the top of the component compartment. The
bulb is 25 watts and 125 VAC. To access the oven
lamp assembly:
1. Remove the microwave from the oven.
2. Remove the outer case.
3. Unplug the harness connector from the oven
lamp assembly.
4. Remove 1 screw and the air duct.
Note: The light bulb is not removable from the
socket. Replace as a complete assembly.
5. Slide the oven lamp assembly out of the tabs
and remove.
Microwave Turntable Motor
The microwave must be removed from its installa-
tion to service the turntable motor.
The turntable motor is a 120 VAC motor that is
mounted to the bottom of the oven. The turntable
motor will operate any time the magnetron is
operating.
Oven Lamp Assembly
Air Duct
Microwave Performance Test
This test will verify that the microwave oven high-
voltage and magnetron circuits are operating to
performance specifications.
The standard load is 1 liter (1000 ml) of water with
a starting temperature of 59 °F to 75 °F in a
1000-ml beaker (WB64X0073). (Do not use any
other load or dish, as results will vary from the
standard.)
1. Measure the line voltage (loaded). This test is
based on normal voltage variations of 105 VAC
to 130 VAC. Low voltage will affect power and
temperature rise.
2. Place beaker containing 1 liter of water on
glass shelf in the center of the oven and record
initial water temperature with an accurate
glass thermometer (Robinar no. 12084).
3. Run the microwave on high power setting for 2
minutes, 3 seconds.
4. At the end of the cooking cycle, record the
water temperature. The minimum difference
between the initial and ending temperatures
should be 40 °F @120 VAC.
If the water temperature rose but did not reach the
40 °F minimum difference, suspect a problem with
the line voltage (test under full load) or magnetron/
high-voltage circuit. If the water temperature did
not rise at all, suspect a problem in the high-
voltage circuit.
Microwave Leak Test
Warning: Maximum allowable leakage is
4 MW/cm
2
. Inform the manufacturer of any oven
found to have emission in excess of 4 MW/cm
2
.
Make repairs to bring the unit into compliance at no
cost to the owner and determine the cause.
Instruct the owner not to use the oven until it has
been brought into compliance.
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