8-2-4 Load / Buzzer Drive & Open Door Detection Circuit
1. Load Drive Condition Check
2. Fan motor driving circuit (freezer 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.
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LOAD TYPE
COMP
NO.16 NO.11 NO.12 NO.13 NO.14 NO.15
1V or below
12V
DEFROSTING
HEATER
LAMP-F
LAMP-R
WATER
VALVE/VALVE2
FRENCH
DOOR
HEATER
Measurement Location (IC6)
Condition
ON
OFF
part part part
MOTOR OFF 2V or less 0V 5V
MOTOR ON 13V~15V 0V 2V~3V
a b
c
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