Jenn-Air JMD2124WS Technical Education - page 44
5-2
H.V. Capacitor
1. Unplug microwave oven or disconnect power.
2. Remove wire leads.
3. Prepare the DC 9-volt battery and 10k ohms resistance including wire leads.
4. Connect the DC 9-volt battery to the H.V. capacitor.
5. Measure resistance:
Terminal to terminal: Normal: 9 volts (approximate); Abnormal: 0 volts (approximate)
Terminal to case: Normal: 0 volts (approximate); Abnormal: 0 volts (approximate)
H.V. Diode
NOTE: Some inexpensive ohmmeters do not have a 9-volt battery incorporated in them, and may
indicate infinite resistance in both directions when testing the diode. It is recommended that you use an
ohmmeter with a 9-volt battery on the 10x scale to properly test the H.V. diode.
1. Unplug microwave oven or disconnect power.
2. For ohmmeters without a 9-volt battery, prepare the DC 9-volt battery and 10k ohms resistor in
series including wire leads.
3. Connect the DC 9-volt battery to the H.V. diode.
4. Measure continuity:
Forward: Normal: 5 to 6 volts (approximate);
Abnormal: Open—9 volts (approximate); Short—0
volts (approximate)
Reverse: Normal: 9 volts (approximate); Abnormal: Open—9 volts (approximate); Short—0 volts
(approximate)
Stirrer Motor
1. Unplug microwave oven or disconnect power.
2. Remove wire leads.
3. Measure resistance:
Normal: 3.8k ± 0.2k ohms (approximate)
Abnormal: Infinite
Cooling Fan Motor
1. Unplug microwave oven or disconnect power.
2. Remove wire leads.
3. Measure resistance:
Normal:
A 95 to 120 ohms (approximate)
B 10 to 25 ohms (approximate
Abnormal: Infinite
AC Line Filter
1. Unplug microwave oven or disconnect power.
2. Remove wire leads.
3. Measure resistance:
Normal: L(1) to L(2) (coil): Less than 1 ohm;
N(1) to N(2) (coil): Less than 1 ohm
Abnormal: Infinite
Normal: L(1) or L(2) to N(1) or N(2) (resistor): 1.5M ohms
Abnormal: 0 ohms
Components Test/Results
COMPONENT TESTING (continued)