Panasonic NN-8508 - Page 27

NN-8508, NN-8558
NN-8808, NN-8858
NN-8808P
[TROUBLE 4] Other troubles
CONDITIONS POSSIBLE CAUSE NOTE
Microwave output power is low. 1. Decrease in power source voltage.
First of all, check if output power is 2. Aging change of magnetron.
really low by following “Measure-
ment of microwave output” on
page 23.
Oven lamp and turntable motor 1. Shorted contacts of latch switch A. -| For U.S.A. models only.
turn on when door is open.
Oven lamp and turntable motor 1. Open latch switch B.
turn on when power supply cord is 2. Shorted contacts of power relay A. (RYA)
plugged into wall receptacle. 3. Defective D.P.C.
Microwave oven does not operate
normally, when auto sensor cook-
ing is selected.
. Open or loose wiring of sensor terminals from D.P.C.
. Defective humidity sensor.
. Defective D.P.C.
(See trouble 5-G, H on page 29.)
On
. Defective fan motor.
. Defective thermal cutout.
. Faulty power relay E.
. Defective D.P.C.
Magnetron oscillates for 1.5 ~ 5
minutes after start pad is tapped,
then stops all functions of the oven.
POND
—
. Faulty power relay C or D.
2. Defective D.P.C.
Upper or lower heater turns on
when microwave cooking.
In this case, this trouble should be
causing fuse and/or home circuit
breaker to open.
Combination cooking is not work- 1. Defective D.P.C.
ing in correct order.
“FF FF” appeares in display win- 1. Short or open oven temp sensor
dow after 2 minutes elapsed in the 2. Defective D.P.C.
bake, broil or combination cooking
mode