7-2-4 Load / Buzzer Drive & Open Door Detection Circuit
1. Load Drive Condition Check
2. Fan motor driving circuit (freezing compartment fan)
- 22 -
LOAD TYPE
COMP
NO.14 NO.11 NO.13
1V or below
12V
DEFROSTING
HEATER
LAMP
TCM
POWER MODE
(OPTIONAL)
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
NO.12
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 SC 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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