Daewoo KQG-868G7S, Руководство по обслуживанию

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Following the procedure below to check if the oven is defective or not.
1) Check earthing 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.
(TROUBLE 1) Oven does not operate at all : any inputs can not be accepted.
TROUBLE SHOOTING GUIDE
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
↔
NC)
Check continuity of both primary
and secondary interlock switch
with door closed
Malfunction of
interlock monitor
switch
Malfunction of
interlock switch
RESULT
Continuity
No Continuity
CAUSE REMEDY
Replace
Fuse blows.
Replace
Shorted contacts
of primary inter-
lock switch.
Continuity
Replace
Check continuity of primary inter-
lock switch contact with door par-
tially open until interlock monitor
switch contact close
(COM
↔
NC)
Defective low
voltage trans-
former
0
Ω
or infinite
Approx.
1160
Ω
(normal)
Replace
Check continuity of primary wind-
ing of low voltage transformer
Defective high
voltage trans-
former
Fuse again
blows
Replace
Disconnect high voltage fuse and
operate the unit
No Continuity
Continuity