Troubleshooting Guide - Daewoo KOR-6L7B1V Service Manual

TROUBLESHOOTING 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.
(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.
CONDITION
Fuse blows.
Check continuity of interlock
monitor switch with door closed
Check continuity of of primary
interlock switch contact with door
partially open until interlock
monitor switch contact close
Check continuity of primary
winding of low voltage
transformer
Disconnect one side of the lead
wire connected form high
voltage transformer to the high
voltage capacitor and operate
the unit
CHECK
Replace fuse
RESULT
Continuity
No Continuity
Continuity
No Continuity
0Ωor infinite
Approx.
310~420
(normal)
Normal
Fuse again
blows
17
CAUSE
Malfunction of
interlock
monitor switch
Shorted
contacts of
primary
interlock switch.
Defective low
voltage
transformer
Defective high
voltage capacitor
Defective high
voltage
transformer
REMEDY
Replace
(NOTE 1)
Replace
(NOTE 1)
Replace
Replace
Replace