Daewoo KOR-63XQ0S, Руководство по обслуживанию

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18
(TROUBLE 3)
No microwave oscillation even though fan motor rotates.
CONDITION RESULT CAUSE REMEDY CHECK
No
microwave
oscillation
No Continuity
Check continuity of
high voltage fuse
Replace high voltage fuse
Continuity
Defective
high voltage
transformer
Replace Check continuity of
high voltage capacitor
terminals with wires removed
Continuity in
backward
direction
Defective
high voltage
rectifier
Replace Check continuity of high voltage
rectifier in forward and backward
direction with DC megger
Continuity
Defective
magnetron
Replace Connect megger leads to
magnetron terminal and
magnetron body
0Ω
or
∞ Defective high
voltage
transformer
Replace Check resistance of primary and
secondary coil of high voltage
transformer
No continuity
Defective
magnetron
Replace Check continuity of
magnetron with wires
removed
No continuity
Defective
high voltage
transformer
Replace Check continuity of
filament terminal of high
voltage transformer
0 V
Replace
Approx
15VDC
Faulty contacts
or RELAY
(RY1) or open
relay coil.
Replace
Check D.C. voltage
being supplied to
RELAY(RY1) coil
Defective
touch control
circuit