Kenmore 795.78542.801 Service Manual page 33

8-2-2 Load / Buzzer Drive & Open Door Detection Circuit
1. Load Drive Condition Check
Circuit
Compressor
Defrost heater
F,R-lamp
Water valve
Frech Door Heater
Water valve
II
To measure outputs of the control board, check voltages between the pins for the following components:
NOTE: When the door of the freezer/refrigerator is left open for 7 minutes or longer, the lamp turns off
automatically.
2. Fan motor driving circuit (freezing compartment fan, mechanical room)
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.
Pin Number
MOTOR OFF
MOTOR ON
Pin Number
Con1 pin1
Con2 pin1
Con2, pins 3 and 5
Con2 pin7
Con3 pin3
Con3 pin1
F-FAN
Pin1 & 2 of con4 Pin4 & 5 of con4
2V or less
13V ~ 15V
Pin Number
Con1 pin3
Con1 pin3
Con1 pin3
Con1 pin3
Con1 pin3
Con1 pin3
C-FAN
2V or less
11V ~ 15V
- 33 -
Output Voltage
115 VAC
115 VAC
115 VAC
115 VAC
115 VAC
115 VAC