DAEWOO ELECTRONICS KOR-637V, Руководство по обслуживанию

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18
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.
(TROUBLE 1) Door shut, timer set, but no cooking takes place.
Continuity
No Continuity
Continuity
0 Or
Approx.
150~310
(normal)
Replace
NOTE 1
Replace
NOTE 1
Replace
Replace
Check continuity of
primary winding of low
voltage transformer
Malfunction
of interlock
monitor
switch
Defective low
voltage
transformer
Check continuity of
interlock monitor switch
with door closed
(COM C)
Check continuity of primary
interlock switch contact
with door partially open
until interlock monitor switch
contact close
(COM NO )
Shorted contacts
of primary
interlock switch.
Fuse again
blows
Disconnect high voltage
fuse and operate the unit
Defective high
voltage transformer
No Continuity
Replace
NOTE 1
Check continuity of both
primary and secondary
interlock switch with door
closed
Malfunction of
interlock switch
No Continuity
Continuity
N
CHECK RESULT CAUSE REMEDY CONDITION
Fuse blows.
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.
NOTE