Electrolux EMC3065X Service Manual page 21

TROUBLE 3) No microwave oscillation even though fan motor rotates.
CONDITION
No
microwave
oscillation
high voltage capacitor terminals
high voltage rectifier in forward
1
1
2
CHECK
Check continuity of
high voltage fuse
No microwave oscillation
Check continuity of
with wires removed
Check continuity of
and backward
direction with DC megger
Connect megger leads to
magnetron terminal and
magnetron body
Check D.C voltage
being supplied to
RELAY (RY1) coil
Check resistance of primary
and secondary coil of high
voltage transformer
Check continuity of filament
terminal of high voltage
transformer
Check continuity of
magnetron heater with wires
removed
RESULT
No
continuity
Continuity
Continuity
in backward
voltage rectifier
direction
Continuity
0 V
Approx.
Faulty contacts of
24V DC
0 or
No continuity
No continuity
21
CAUSE REMEDY
Defective
high voltage
fuse
Defective
high voltage
transformer
Defective high
Defective
magnetron
Defective
touch control
circuit
RELAY
(RY1) or open
relay coil
Defective
high voltage
transformer
Defective high
voltage
transformer
Defective
magnetron
Replace
1
Replace
2
Replace
Replace
Replace
Replace
Replace