LG LSC27931ST - Sound and Noise Issues; Internal Moisture and Frost; External Moisture Formation

1-7. Option designation circuit (model separation function)
The circuit configuration is OP1 open and OP2 in short, these circuits are preset at the factory and can not be altered.
1-8. Stepping motor operation circuit
CONNECTOR 9
STEPPING MOTOR
PIN 9, 10, 11, 12
RD, YL, BK, BL
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