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S E R V I C E
QUICK SERVICE REFERENCES
PROBLEM
Cavity lamp does not light, but
other electrical components
(e.g. turntable) are working.
Cavity lamp does not light, all
other electrical components
also do not work.
Oven seems working, food
does not cook
Oven cooks for a short while
and stop.
Turntable does not turn.
User circuit breaker activates.
MAJOR COMPONENT TESTS
HV TRANSFORMER
Remove lead wire.
Measure the resistance of the winding using an ohm meter
Primary winding 3 ohm (approx.)
Secondary winding 100 ohm (approx.)
Filament winding 0 ohm (approx.)
HV CAPACITOR
Remove lead wire
Measure the resistance using an ohm meter set to R*1000
Terminal to terminal should momentary indicates several ohms but gradually increases to infinite.
Terminal to case should show infinite.
Whirlpool Europe
Customer Service
POINTS TO CHECK
Lamp burnt.
Bad contact between lamp and lamp socket.
Power plug not in good connection with the socket.
No power supply.
Fuse blown.
Bad contact between fuse and fuse holder/clip.
Loose door hinge, door poorly adjusted, interlock poorly
adjusted; causing fuse to be blown.
Short circuit within electrical circuit.Lamp filament short,
HV transformer short, all causing fuse blown.
Bad contact in contacts or terminals of timer switch,
primary and secondary interlock switch.
HV diode break down.
Defective magnetron (filament broken, filament short to
ground etc.).
Ground wire of HV transformer broken.
Filament wire short to ground.
Filament wire broken.
Bad contact in magnetron terminals.
Defective control boards.
HV diode break down, giving a hum noise.
Cooling fan jammed.
Cooling fan motor open circuit.
Defective cooling fan control relay.
Defective turntable motor.
Turntable shaft deformed.
High leakage in electrical components (mostly motor).
AVM 512
8538 512 62291
11.11.1998 / Page 7
Doc. No: 4812 714 12457
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