Wiring Diagram; Description Of Operation - Panasonic NN-A883WB Service Manual

6. Wiring Diagram

7. Description of Operation

7.1. Variable cooking power control
The HIGH VOLTAGE INVERTER POWER SUPPLY controls the output power by a signal from
the Digital Programmer Circuit (DPC). The Power Relay (RY1) turns on to supply power to the
inverter circuit. The level of output power is controlled by the drive signal level from the inverter
circuit as indicated in the table below.
/ NOTE 1: The ON/OFF time ratio does not correspond with the percentage of microwave power
since approximately 2 seconds are required for heating the magnetron filament.
NOTE 2: If microwave cooking is over 8 minutes on HIGH power, the fan motor rotates for 1