Samsung AM007FN1DCH/AA Service Manual page 310

PCB Diagram and Parts List
Wall-Mounted type (Boracay)(Cont.)
① CN1-2WIRES COMM.
#1,#2,#19,#20:COMM. SIGNAL
#3,#18:EXTERNAL CONTROL
#4,#17:COMP CHECK
#5,#16:ERROR CHECK
#6:VCC(DC5V)
#7,#14:GND
#8,#13,#15:DC12V
#9~#12:COMM. SIGNAL
Samsung Electronics 5-25