Daewoo KOR-816T Service Manual download pdf (Page 20)

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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; any inputs can not be accepted.

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.

NOTE

CONDITION

CHECK RESULT CAUSE REMEDY

Fuse blows.

Continuity

(COM NC)



(COM NC)



No Continuity

Continuity

0 infinite

Ω

Approx.

150~210

(normal)

Fuse again

blows

Replace

NOTE 1

Replace

NOTE 1

Replace

NOTE 1

Replace

Check continuity of

interlock monitor switch

with door closed

(COM NC)



Check continuity of both

primary and secondary

interlock switch with

door closed

Check continuity of

primary winding of low

voltage transformer

Disconnect high voltage

fuse and operate the unit

Check continuity of

primary interlock switch

contact with door

partially open until

interlock monitor switch

contact close

(COM NC close)



Malfunction

of interlock

monitor

switch

Malfunction

of interlock

switch

Shorted

contacts of

primary

interlock

switch

Defective low

voltage

transformer

Defective

high voltage

transformer

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 47 48

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Daewoo KOR-816T Service Manual Page 20

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