Daewoo KOC-910K0P(AL), Руководство по обслуживанию, Страница: 19 / 40

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8. TROUBLE SHOOTING GUIDE
Following the procedure below to check if the oven is defective or not.
1) Check grounding before trouble checking.
2) Be careful of the high voltage circuit.
3) Discharge the high voltage capacitor.
4) When checking the continuity of the switches, fuse or high voltage transformer, disconnect one load wire from these parts and
check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
(TROUBLE 1)
Oven does not operate at all : any inputs can not be accepted.
NOTE : When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connection of the terminals and power cord before check
the parts listed below.
CONDITION RESULT CAUSE REMEDY
Continuity
No continuity
Malfunction of
Interlock
monitor switch Replace
CHECK
Fuse blows. Check continuity of
interlock monitor switch with
door closed
NO
Continuity
Continuity
Malfunction of
Interlock
monitor switch Replace Check continuity of
both primary and secondary
interlock switch with door closed
Continuity Shorted contacts
of primary
interlock Switch Replace
Check continuity of
Primary interlock switch contact
with door partially open until
interlock monitor switch contact
close
Check continuity of
Primary winding of low voltage
transformer
Fuse again
blows
Defective
high voltage
transformer Replace
Disconnect high voltage
fuse and operate the unit
Ω
or infinite
Approx.
530
Ω
(normal)
Defective low
voltage
transformer Replace