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SERVICE
11.11.1998 / Page 8 AVM 512 Whirlpool Europe
Doc. No: 4812 714 12457 8538 512 62291 Customer Service
HV DIODE
Remove lead wire.
Measure forward resistance, normal diode show continuity.
Measure reverse resistance, normal diode show infinite resistance.
MAGNETRON
Remove lead wire.
Install the magnetron gasket in the correct position. Check that the gasket is in good condition.
Measure the resistance of the filament terminals. Normal magnetron should be less than 1 ohm.
Measure the resistance between the filament terminal to chassis. Normal magnetron should be infinite.
INTERLOCK SWITCH SYSTEM
IMPORTANT: The installation of the interlock and monitor switches is required by Federal regulations.
The interlock and monitor switches positions are not service adjustable. If the screws on the hinges of the
oven door are loosen, the door may not be in a correct position. In this case, the interlock switches cannot be
operated by the latch pins of the door when the door is shut. To repair the door, remount the door and fasten
the screws on the door hinges.
The monitor switch is provided to monitor the operation of the primary interlock switch. If the primary switch
fails to operate when the door is open, the monitor switch will form a short circuit across the supply and the
fuse in the oven will blow. Electric arc may form across the switch contacts of the primary interlock switch,
the secondary switch and the monitor switch. The switches may then be damaged. If the fuse is blown due
to the failure of the primary interlock, repair the failed mechanical parts and replace all the interlock switches.
IMPORTANT
After replacement of any part of the interlock and monitor circuit:
Check if the microswitches are turned ON and OFF by the latches as specified in the table above.
Apply sealant to the screws and nuts of the door hinges.
Check microwave leakage.
Check if the oven will turn off instantly when the door button is pushed to the position where the door latches
leave the interlock switches.
Oven door
status
Primary
switch
Secondary
switch
Monitor
switch
Open Open Open Close
Close Close Close Open