Daewoo KOR-612L0S, Service Manual

Page: 36 / 55

35
(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
12A fuse
blows Continuity
No
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 contacts
of primary inter-
lock switch.
(Replace 12A fuse)
Defective high
voltage transformer
Check continuity
of primary
winding of low
voltage transformer. 0
Ω
or
infinite
Approx.
110~130
Ω
(normal)
Shorted of open
winding
Replace
Normal
Replace Low
Voltage
Transformer
Replace
12A fuse
again
blows
Defective high
voltage capacitor
Disconnect one
side of the lead
wire connected
from transformer
to the high voltage
capacitor and
operate the unit.
NOTE 1
NOTE 1
NOTE 1:
All these switches must be replaced at the same time, please refer to page 19 and 20 for adjust-
ment instructions.