7-2-2 Load / Buzzer Drive & Open Door Detection Circuit

1. Load Drive Condition Check

To measure outputs of the control board, check voltages between the pins for the following components:

Circuit

Pin Number

Pin Number

Output Voltage

 

 

 

 

 

 

Compressor

Con1 pin1

Con4 pin1

115 VAC

 

 

 

 

 

 

Condenser fan

Con1 pin1

Con4 pin1

115 VAC

 

 

 

 

 

 

Evaporator fan

Con1 pin1

Con4 pin1

115 VAC

 

 

 

 

 

 

Defrost heater

Con1 pin3

Con4 pin1

115 VAC

 

 

 

 

 

 

F,R-lamp

Con1 pin5

Con4 pin1

115 VAC

 

 

 

 

 

 

NOTE: When the door of the freezer/refrigerator is left open for 7 minutes or longer, the lamp of the freezer/refrigerator turns off automatically.

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LG Electronics LRTN22310, LRTN19310 Load / Buzzer Drive & Open Door Detection Circuit, Load Drive Condition Check

LRTN19310, LRTN22310 specifications

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