Panasonic NN-CT641M Service Manual page 28

(TROUBLE 6) Oven does not cook properly when programmed for the set power level
(Operates properly on HIGH)
CONDITION
Output is full when
you set lower
power level.
(TROUBLE 7) Grill
CONDITION
1. Grill Heater is
not operating.
1. Lower tempera-
ture the oven.
CHECK
Disconnect the
wire leads from
relay 5 and check
continuity relay 5.
(Operate the unit)
CHECK
Heater.
Thermostat and
relay 4.(Grill)
Wire connection.
Heater.
Thermostat and
relay 4.(Grill)
RESULT
Abnormal.
RESULT
Abnormal.
Normal.
Abnormal.
Normal.
No continuity.
Abnormal.
Normal.
Abnormal.
5-17
CAUSE
Defective P.C.B.
assembly.
CAUSE
Malfunction the
heater.
Malfunction the
thermostat.
Open or loosen.
Malfunction the
heater.
Malfunction the
thermostat.
REMEDY
Replace P.C.B.
assembly.
REMEDY
Replace.
Replace.
Replace or
connect tightly.
Replace.
Replace.