Whirlpool AVM 930 AV Service Manual page 16

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AVM 930 -MW L2
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Diode check
The high voltage diode is built-in in the same case as the HV capacitor. 'I
Unplug the oven, discharge the capacitor and remove wires tram it.
With an ohmmeter set on the highest scale, measure the resistance ac ross terminal "C" and capacitor case.
Reverse the meter leads and again observe the resistance reading. A normal diode should read infinite resistance in one ~
direction and approximately 50 KQ or less when the meter leads are reversed.
Note: Meters opera ted with less than 6 V battery are not adequate tor these checks. The meter should be first checked with I)
a diode known to be good before judging a diode to be defective.
Safety switches check ~
Disconnect the oven, remove wire from terminal 1 of the switch, connect an ohmmeter to the terminals 1 and 4. With
closed dOOf reading should be short circuit, with open door reading must be infinite. n
If reading is short circuit or infinite all the time, the switch must be replaced.
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Note: If a safety switch is replaced make sure it is activated when ~ ~ n ~
the door is closed. ~ I ' 4
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Failure monitor switch check Fig. 16 !
Disconnect the oven, remove one wire tram the switch, connect an ohmmeter to the terminals of the switch. With open
door reading has to be short circuit, with closed door reading has to be infinite. 1
If reading is short circuit or infinite all the time switch must be replaced.
Note: When replacing the failure monitor switch make sure the switch is activated when the door is open. ~
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