Inverter; Upper Heaters - Panasonic NN-CS596S BPQ Service Manual

4.4. H.V. Inverter
1. Discharge high voltage remaining in high voltage capacitor.
2. Remove 2 screws holding reinforce bracket A on oven
cavity.
3. Remove 1 screws holding reinforce bracket B on cavity top
plate.
4. Remove 1 screw holding oven thermistor on cavity top
plate.
5. Release lead wire harness from locking tabs on Inverter
bracket A.
6. Disconnect 2 lead wires from noise filter (U) terminals.
7. Disconnect 2 lead wires from fan motor terminals.
8. Disconnect 2 lead wires from the harness of noise filter (U),
which connecting to both "Negative" and "live" lead of circuit
breaker.
9. Disconnect 2 high voltage lead wires from magnetron
filament terminals.
10. Unplug connector CN701 & CN702 from H.V. Inverter
board.
11. Remove 1 screw holding Inverter guide bracket on reinforce
bracket B, then release locking tabs, detach Inverter guide
bracket.
12. Release locking tabs connecting Inverter bracket A with
Inverter bracket B detach bracket A & B.
13. Remove 2 screws holding H.V. Inverter on Inverter bracket.
4.5.

Upper heaters

For BPQ & EPG models, all the ceramic heaters are
450W/80V. But for SPG & WPG models, there are two kinds of
heater, both the front one & back one are 450W/120V heaters,
and the middle one is 450W/230V heater.
1. Disconnect lead wires from both sides of 3 upper heaters.
2. Remove 3 screws holding heater support from the left side
of microwave oven.
3. Remove the heater by pulling it out.
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NN-CS596S