Daewoo KOR-63B50S, Service Manual

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TROUBLE SHOOTING GUIDE
Following the procedures below to check if the oven is defective or not
1. C heck grounding before checking trouble.
2. B e careful of the high voltage circuit.
3. D ischarge the high voltage capacitor.
4. W hen checking the continuity of the sw itches, fuse or high voltage transform er, disconnect one lead w ire from these parts
and then check continuity w ith the A C plug rem oved. To do otherw ise m ay result in a false reading or dam age to your m eter.
(TR O UB LE 1) D oor shut, tim er set, but no cooking takes place.
Does the fan motor work when you
shut the door and turn the timer?
Does the
fuse blow? Check continuity of interlock
monitor switch with door shut.
Replace primary, secondary
interlock switch and interlock
monitor switch.
Replace fuse and check
continuity of both interlock
switch's contact and monitor
switch's contact with door
partially open until monitor
switch contact.
Replace primary, secondary
interlock switch and interlock
monitor switch.
Disconnect one side of the
lead wire connected from
transformer to the high voltage
capacitor, and operate oven.
Replace high
voltage
capacitor.
Replace high
voltage transformer
If outlet has proper voltage,
check continuity of power
supply cord. Replace power
supply cord.
YES (Refer to next page)
NO
NO
NO
YES
Continuity
NO Continuity
NO Continuity
Both continuity
Normal
Fuse again