Jenn-Air JMD2124WS Technical Education - Component Testing
5-1
COMPONENT TESTING
1. Place 8 oz (250 mL) of lukewarm water in the center of the
microwave oven.
2. Operate on HIGH power level for 2 minutes. Water should be
hot.
NOTE: If the water takes longer than 2 minutes to heat, this
may indicate either the operating voltage is lower than
110 volts or there is a problem with the microwave oven.
Component Tests
IMPORTANT:
Unplug microwave oven or disconnect power.
Discharge the high-voltage capacitor and remove the lead
wires from the primary winding of the high-voltage
transformer before conducting any of the following tests.
Remove the lead wires from the related component before
conducting any of the following tests.
Conduct a microwave energy test after performing any tests
or repairs to the microwave oven.
Check that all wire leads are in the correct positions before
operating the microwave oven.
All operational checks using microwave energy must be done
with the microwave oven loaded with a minimum of 8 oz
(250 mL) of water in a microwave safe container.
Grasp wire connectors when removing the wire leads from
microwave oven parts.
All testing must be done with an ohmmeter having a
sensitivity of 20,000 ohms per volt DC or greater, and
powered by at least a 9-volt battery.
Components
Test/Results
H.V. Transformer
NOTE: The inside lead wire is red. The outside lead wire is white. Do not reverse leads.
1. Unplug microwave oven or disconnect power.
2. Remove wire leads.
3. Measure resistance:
Primary winding: 0.2 to 0.4 ohm (approximate)
Secondary winding: 60 to 90 ohms (approximate)
Filament winding: Less than 1 ohm
Primary winding to grounding: Normal: Infinite
Filament winding to grounding: Normal: Infinite
Magnetron
1. Unplug microwave oven or disconnect power.
2. Remove wire leads. Check that the seal is in good condition.
3. Measure resistance:
Filament terminal: Normal: Less than 1 ohm
Filament to chassis: Normal: Infinite
MICROWAVE OVEN POWER OUTPUT TEST
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.