JUKI LK-1900A Series Engineer's Manual page 73

6) INT board
The INT board repeats the head sensor signals and transfers the head model data to the MAIN board.
CN64: Presser bar lifter origin (black)
CN66: Thread trimmer operation (red)
CN65: Needle thread clamp origin
Needle thread clamp operation
(yellow)
The head model type (Memory switch No. 241), corrected value of the active tension, the number of stitches for
grease-up (Memory switch No. 245), etc. are stored.
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CN62: X feed origin (red)
CN63: Y feed origin (yellow)
CN67: Fall switch (red)