DAEWOO ELECTRONICS KOC-9Q0T7S, Service Manual

Page: 21 / 41

20
CONDITION CHECK
Check continuity of
magnetron
Defective
magnetron.
RESULT
No
continuity
CAUSE REMEDY
Replace
Outlet has
proper
voltage
fuse does not
blow?
Check continuity of noise filter
board
Defective line
filter board
No
continuity
Replace
Check continuity of
power supply cord
Defective touch
control circuit
Replace
Open power
supply cord
No
continuity
No
continuity
Replace
NOTE : All these switches must be replaced at the same time, please refer to (7.Interlock mechanism and
adjust) for adjustment instructions
(TROUBLE 2)
Display shows all figures selected, but oven does not start cooking, even though desired program and time
are set and start button is tapped.
CONDITION CHECK
Check continuity of
primary interlock switch
Malfunction of
primary interlock
switch
RESULT
No
continuity
CAUSE REMEDY
Adjust or
replace
Turn table
motor and
oven lamp
do
not turn on
Check D.C voltage
being supplied to
RELAY(RY2) coil
Fault contacts
of RELAY
(RY2) or open
relay coil.
Replace
Check continuity of
D.O.M switch
Malfunction of
D.O.M switch
No
continuity
Adjust or
replace
Defective touch
control Circuit
0V
Approx.
12V DC
Replace