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EXPLANATION FOR MICOM CIRCUIT
1-8. Fan motor driving circuit (freezing chamber, M/C chamber)
1. This circuit performs function to make standby power '0' by cutting off power supplied to ICs inside of the fan motor when
the fan motor is OFF.
2. This circuit performs a temporary change of speed for the fan motor and applies DC voltage ranging between 7.5V an
16V to the motor.
3. This circuit futher functions to stop the fan motor further by cutting off power applied to the fan motor as it senses the fan
motor's RPM.
Motor OFF
Motor ON
a , d part
5V
2 ~ 3V
b part
2V or less
12 ~ 14V
b
a
e
CE7
d
- 39 -
e part
2V or less
8 ~ 16V
c
f
c , f part
0 V
0 V
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