Daewoo KOR-971M0A Service Manual page 51

Condition
Outlet has
proper voltage.
Fuse does not
open.
(TROUBLE 4) Display shows all figures selected, but oven does not start cooking, even though desired program
and time are set and start pad is tapped.
Condition
Turntable
motor fan
motor and
oven lamp do
not turn on.
Condition
Turntable
motor, fan
motor and
oven lamp turn
on for a
second when
the start pad is
tapped
Check
Check continuity of
magnetron thermostat
Check continuity of
power supply cord.
Display do not shown
countdown
Check
Check continuity of
parimary interlock
switch
Check D.C. voltage
being supplied to
RELAY "2" coil.
Check
Check continuity of
primary winding of
high voltage
transformer and touch
control circuit
Result
No Defective mangetron
Continuity thermostat.
No Open power supply
Continuity cord.
Defective P.W.B.
Normal
ASSY
Malfunction of D.O.M
switch
Result
No Malfunction of Primary
Continuity Interlock Switch
Defective P.W.B.
0V
ASSY
Approx. Faulty contacts of
24VDC RELAY "2" or open
relay coil
Result
No Open winding
Continuity
Normal Defective touch control
circuit
49
Cause Remedy
Replace
Replace
Replace
Replace
Cause Remedy
Adjust or
replace
Replace
Replace
Cause Remedy
Replace
Replace