Daewoo KOG-8B5R5S, Руководство по обслуживанию, Страница: 20 / 38

19
TROUBLE SHOOTING GUIDE
(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.
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
(COM
↔
NO)
Check continuity of primary
interlock switch contact with
door partially open until
interlock monitor switch contact
close (COM
↔
NO)
Malfunction of
interlock
monitor switch
Shorted
contacts of
primary
interlock switch.
RESULT
Continuity
No Continuity
CAUSE REMEDY
Replace
NOTE
NOTE
NOTE
Fuse blows
Replace
Defective low
voltage
transformer
0 Ω or infinite
Approx.
150~310
(normal)
Replace
Check continuity of primary
winding of low voltage
transformer
Defective high
voltage
transformer Fuse again
blows
Replace
Disconnect high voltage fuse
and operate the unit
Continuity
Check continuity of primary
interlock switch contact with
door partially open until interlock
monitor switch contact close Shorted
contacts of
primary
interlock switch
Continuity
Replace No Continuity