Trouble Shooting Guide - Daewoo KOG-37050P Service Manual

TROUBLE SHOOTING GUIDE

Following the procedures below to check if the oven is defective or not.
1. Check grounding before checking trouble.
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 lead wire from these parts
and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
(TROUBLE 1) Door shut, timer set, but no cooking takes place.
Does the fan motor work when you
shut the door and turn the timer?
NO
YES
Does the
fuse blow?
NO
If outlet has proper voltage,
check continuity of power.
YES (Refer to next page)
Check continuity of interlock
monitor switch with door shut.
NO Continuity
Replace fuse and check
continuity of both interlock
switch's contact and monitor
switch's contact with door
partially open until monitor
switch contact.
Both continuity
Disconnect one side of the
lead wire connected from
transformer to the high voltage
capacitor, and operate oven.
Fuse again
NO Continuity
Continuity
Replace primary, secondary
interlock switch and interlock
monitor switch.
Replace primary, secondary
NO
interlock switch and interlock
monitor switch.
Normal
18
Replace high
voltage
capacitor.
Replace high
voltage transformer
Replace power
supply cord.