Panasonic NN-C69KSMEPG Service Manual page 27

(TROUBLE 3) Display shows all figures set, but oven does not start cooking while
desired program times are set and START pad is touched.
CONDITION
Check continuity
1.Setting time does
of secondary
not count down
switch (with
when touching
door closed).
START pad.
Check the con-
nection between
connector and
P.C.B assembly.
2. Fan motor or
Check fan motor.
oven lamp
do not turn
on.
Check oven lamp.
(TROUBLE 4) Oven seems to be operation but output power is low.
CONDITION
Check the
Output is low.
power source
voltage.
Disconnect the
wire leads from
relay 2 and check
on and off time
with multitester.
Measure the
output power.
NOTE: Refer to Page 5-3 for measuring of microwave power output.
CHECK RESULT
No continuity.
continuity.
No continuity.
Continuity.
Abnormal.
Abnormal.
Normal.
CHECK RESULT
Lower than 90% of
rating voltage.
Normal.
Abnormal.
Normal.
Abnormal.
CAUSE
Defective
secondary switch.
Defective P.C.B
assembly.
Loose connection.
Defective fan
motor.
Defective oven
lamp.
CAUSE
Decrease in power
source voltage
with load.
Defective P.C.B
assembly.
Defective
magnetron.
5-15
REMEDY
Replace
secondary switch.
Replace P.C.B
assembly.
Connection then
tightly.
Replace fan
motor.
Replace oven
lamp.
REMEDY
Suggest customer
contact local
electric power
utility co. or
qualified
electrician.
Replace P.C.B
assembly.
Replace
magnetron.