Service manual

22
TROUBLE SHOOTING GUIDE
CONDITION
CHECK RESULT CAUSE
REMEDY
Outlet has
proper voltage
Fuse does not
blow.
Check continuity of
magnetron
No
Continuit
y
Defective
magnetron
Replace
Display do not
shown countdown
No
Continuit
y
Normal
Defective touch
control circuit
Open power
supply cord
Malfunction of
secondary
interlock switch
Replac
e
Check continuity of
power supply cord
Replace
Replace
All these switches must be replaced at the same time, please refer to “Interlock Mechanism And Adjustment”.
NOTE
CONDITION
CHECK RESULT CAUSE REMEDY
Turn table
motor, and
oven lamp d
o
not turn on
No
Continuity
Check continuity of
primary interlock switch
Check continuity o
f
secondary interlock switch
Check D.C. voltage
being supplied to
RELAY (RY2) coil
Malfunction
of primary
interlock switch
Malfunction
of secondar
interlock switch
Defective
touch control
circuit
Fault
contacts of
RELAY
(RY2) or open
relay coil
Adjust or
Replace
Adjust or
Replace
Replace
Replac
e
No
Continuit
y
0 V
Approx
15 VD
C
(TROUBLE 2) Display shows all figures selected, but oven does not start cooking, even thouh desired program and time are
set and start pad is tapped.