Daewoo KOR-630A0A - Manual (Page 18)

17
(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.
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 lead 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.
NOTE : When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connected of the terminals and power cord before check the parts listed
below.
CONDITION CHECK
Check continuity of interlock
monitor switch with door closed
Check continuity of of primary
interlock switch contact with door
partially open until interlock moni-
tor switch contact close
Malfunction of
interlock moni-
tor switch
Shorted con-
tacts of primary
interlock switch.
RESULT
Continuity
No Continuity
Replace fuse
CAUSE REMEDY
Replace
NOTE 1
Fuse blows.
Replace
NOTE 1
Defective low
voltage trans-
former
0
Ω
or infinite
Approx.
150~310
(normal)
Replace
Check continuity of primary
winding of low voltage trans-
former
Defective high
voltage capacitor
Normal Replace
Disconnect one side of the lead
wire connected form high volt-
age transformer to the high volt-
age capacitor and operate the
unit
Continuity
Defective high
voltage trans-
former Fuse again
blows
Replace