Daewoo KOR-3000 Service Manual download pdf (Page 42)

(TROUBLE3) The oven not operate at all; Display window does not display any figures and any

inputs can not be accepted.

Check Result

Cause Remedy

Replace Primary

Interlock Switch

and Secondary

Interlock Switch

and Monitor

Interlock Switch.

Check continuity

Interlock Monitor

switch with door

closed.

Condition

15A fuse

blows

Continuity

continuity

Malfunction of

Interlock moni-

tor

switch

Replace

Primary

Interlock Switch

and Monitor

Interlock Switch.

Check continuity

of both Primary

Interlock Switch

contact with door

partially open until

interlock monitor

switch contact

close.

Continuity

Shorted con-

tacrs

of primary inter-

lock switch.

(Replace 15A fuse)

Defective high

voltage trans-

former

Check continuity

of primary

winding of low

voltage trans-

former.

0 Ωor

infinite

Approx

110~130Ω

(normal)

Shorted of open

winding

Replace

Normal

Replace Low

Voltage

Transformer

Replace

12A fuse

again

blows

Defective high

voltage capaci-

tor

Disconnect one

side of the lead

wire connected

from transformer

to the high voltage

capacitor and

operate the unit.

NOTE 1

NOTE 1:All these switches must be replaced at the same time, please refer to page 22 and 23 for adjust-

ment instructions.

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Daewoo KOR-3000 Service Manual Page 42

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