7-26
CONDITION
CHECK
RESULT
CAUSE
REMEDY
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1.Setting time does
not count down
when touching
START/ENTER
pad.
No continuity.
Continuity.
Defective
secondary switch.
Replace
secondary switch.
Check continuity
of secondary
switch (with
door closed).
Check the con-
nection between
CN1 connector
and PCB
assembly.
2. Fan motor or
oven lamp
do not turn
on.
Abnormal.
Defective fan
motor.
Replace fan
motor.
Check fan motor.
Abnormal.
Defective oven
lamp.
Replace oven
lamp.
Check oven lamp.
Normal.
No continuity.
Continuity.
Defective P.C.B
assembly.
Replace P.C.B
assembly.
Loose connection.
Connection then
tightly.
Output is low.
Lower than 90% of
rating voltage.
Normal.
Decrease in power
source voltage
with load.
Suggest customer
contact local
electric power
utility co. or
qualified
electrician.
Check the
power source
voltage.
Disconnect the
wire leads from
relay 8 and check
on and off time
with multitester.
Abnormal.
Normal.
Abnormal.
Defective
magnetron.
Replace
magnetron.
Defective P.C.B
assembly.
Replace P.C.B
assembly.
Measure the
output power.
(TROUBLE 3) Display shows all figures set, but oven does not start cooking while
desired program times are set and START/ENTER pad is touched.
(TROUBLE 4) Oven seems to be operation but little heat is produced in oven load.
NOTE : Simple test of power output-conducted by heating one liter water for one min. if available.
Minimum 8.5°C temperature rise is normal condition.
