Panasonic NN-S215MF, Service Manual

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The ON/OFF time ratio does not correspond with the percentage of microwave power since
approximately 2 seconds are required for heating of magnetron filament.
OUTPUT ON-OFF TIME OF
POWERSETTING POWER(
%)
POWER RELAY B (RY1)
APPROX. ON(SEC) OFF(SEC)
HIGH 100% 22 0
MEDIUM-HIGH 70% 17 5
MEDIUM 50% 13 9
MEDIUM-LOW 30% 8 14
LOW 15% 5 17
DEFROST 30% 8 14
5.2. Variable power cooking control (NN-S215)
The vari-power controller controls the ON-OFF time of the vari-power switch to vary the output
power of the microwave oven from “Low” to “High”. The vari-power controller is a part of the
timer assembly. The timer assembly consists of timer motor, timer switch, vari-power switch
and the combination of gears, cam and actuater level.
One complete cycle of the vari-power controller is 30 senconds, in which the vari-power switch
is turned “ON” or “OFF” by the cam rotation in the 30 ± 2 second period.
By controlling the timing of the vari-power switch “ON” period, the 220 or 240V AC supplied to
the high voltage transformer is interrupted intermittently so that the average output power of
the microwave oven is varied.
Table shows the timing chart of vari-power switch operation in response to the power setting on
the control panel.
NOTE:
The ON/OFF time ratio does not correspond with the percentage of microwave power since
approximately 2 seconds are required for heating of magnetron filament.
Variable Power Cooking
OUTPUT ON-OFF TIME OF
POWER
SETTING
POWER(
%)
POWER RELAY B (RY1)
APPROX. ON(SEC) OFF(SEC)
HIGH 100% 30 0
MEDIUM-HIGH 70% 23.2 6.8
MEDIUM 55% 16.5 13.5
MEDIUM-LOW 30% 9.8 20.2
LOW 15% 5 25
DEFROST 30% 9.8 20.2
5.3. Turbo Defrost, Auto Reheat, Auto Cook control (NN-S235)
When those Auto Control feature is selected and the Start Pad is tapped:
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