DAEWOO ELECTRONICS KOC-1B0K0S User Manual download pdf (Page 19)

8. TROUBLE SHOOTING GUIDE

Following the procedures below to check if the oven is defective or not.

1. Check grounding before checking trouble.

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 then 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; inputs can not be accepted.

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 parts

listed below.

CONDITION CHECK RESULT CAUSE REMEDY

Fuse blows

Check continuity of

interlock monitor switch

with door closed

( COM NC )

Continuity Malfunction

Of Interlock

monitor switch

Replace

Check continuity of

both primary and

secondary interlock

switch with door closed

Continuity

Malfunction

Of interlock

switch

Check continuity of

Primary winding of low

voltage transformer

Shorted contacts

of Primary

Interlock switch

Defective

Low voltage

transformer

Replace

No continuity

(COM

NC)

Check continuity of

primary interlock switch

contact with door partially

open until

interlock monitor

switch contact close

( COM NC close )

Replace

Defective

high voltage

transformer

Continuity

or infinite

Approx.

530

( normal )

Disconnect high voltage

Fuse and operate the unit

Fuse again

blows

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 37 38

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DAEWOO ELECTRONICS KOC-1B0K0S User Manual Page 19

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