Panasonic NE-2140, Service Manual

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12.1. Defrost control
When defrost power and defrosting time is selected and Start pad is touched:
1. The digital programmer circuit (DPC) divides the total defrosting time
into 8 equal periods, consisting of four defrosting periods, each
followed by a standing period.(See figure)
2. During defrosting power periods, power relay ON-OFF time is
controlled at Low power mode by DPC.
3. During Standing periods, power relay is always open resulting in no
microwave power.
NOTE
Defrost time selected is converted into seconds by the DPC but display will show selected time in
minutes and seconds as programmed. The total number of seconds is divided into 8 time periods. The
remainder (seconds not equally divisible by 8) are added to the last standing time period.
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