Daewoo MCB780W Service Manual page 20

CONDITION
Outlet has
Check continuity of magnetron
proper volt-
age Fuse
does not
blow.
NOTE
All these switches must be replaced at the same time, please refer to "Interlock Mechanism And Adjustment".
(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 continuity of primary inter-
Turn table
motor and
oven lamp
do not turn
on
Check continuity of secondary
Check D.C. voltage being sup-
CHECK
Check continuity of
power supply cord
Display do not shown
countdown
CHECK
lock switch
interlock switch
plied to RELAY (RY2) coil
RESULT
No
Defective mag-
Continuity
No
Open power sup-
Continuity
Normal
Defective touch
Malfunction of sec-
ondary interlock
RESULT
No
Malfunction of pri-
Continuity
No
Malfunction of sec-
Continuity
ondary interlock
0 V
Defective touch
Approx.
Faulty contacts of
15 VDC
RELAY (RY2) or
open relay coil
19
CAUSE REMEDY
Replace
netron
Replace
ply cord
Replace
control circuit
Replace
switch
CAUSE REMEDY
Adjust or
replace
mary interlock
switch
Adjust or
replace
switch
Replace
control circuit
Replace