Panasonic NN-S215MF, Service Manual

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5. DESCRIPTION OF OPERATING SEQUENCE
5.1. Variable power cooking control (NN-S235)
The coil of power relay B (RY1) is energized intermittently by the digital programmer circuit,
when the oven is set at any power selection except for High power position. The digital
programmer circuit controls the ON-OFF time of power relay B contacts in order to vary the
output power of the microwave oven from ”Low” to “High” power. One complete ON and OFF
cycle of power relay B is 22 seconds. The relation between indications on the control panel and
the output of the microwave oven is as shown in table.
NOTE:
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