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2. Fan motor driving circuit (freezing compartment fan)
1. This circuit makes standby power 0 by cutting off power supplied to ISs inside of the fan motor in the fan motor OFF.
2. This is a circuit to perform a temporary change of speed for the fan motor and applies DC voltage up to 7.5V ~ 16V to motor .
3. This circuit prevents over-driving the fan motor by cutting off power applied to the fan motor in the lock of fan motor by
sensing the operation RPM of the fan motor.
part part part
MOTOR OFF 2V or less 0V 5V
MOTOR ON 13V~15V 0V 2V~3V
a b
c
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