Troubleshooting) Oven Stops Operation During Cooking - Panasonic NN-CF771S Service Manual

9.1.

(Troubleshooting) Oven stops operation during cooking

SYMPTOM
1. Oven stops in 3 seconds after
pressing [Start] button.
Oven stops in 23 seconds after
pressing [Start] button.
Oven stops in 1 minute after
pressing [Start] button.
(Convection function)
2. No display and no operation at all.
Fuse is blown.
CAUSE
No input AC is supplied to H.V.Inverter (U)
CN702 terminals
H.V.Inverter (U) operates by the control signals
from DPC but magnetron is not oscillating
Oven thermistor circuit is not functioning.
Most probably loose connection of connectors, or
door latch mechanism is not adjusted properly
1. Latch Switch
2. Power relay RY1
3. Loose lead wire connector CN701, CN702
4. H.V. Inverter (U)
1. Magnetron
2. Loose lead wire connector CN703
3. H.V. Inverter (U)
1. Oven thermistor
2. Loose wiring
1. Align door, Door Latch Switches
2. Loose wiring connectors
23
CORRECTIONS
NN-CF771S