OEM Seiko Robot Controller Motherboard numbers indicate how many connections to what there were 4 servo controller boards, 1 CPU board, and 1 I/O board

Axis Z Encoder Connector -5 GND -3 to own servo controller board -2 unconnected Driver Connector -2 to own servo controller board -1 to I/O board -1 to GP -1 unconnected

Axis T Encoder Connector -5 GND -3 to own servo controller board -2 unconnected Driver Connector -2 to own servo controller board -2 to I/O board -1 to GP

Axis R Encoder Connector -5 GND -3 to own servo controller board -1 unconnected -1 axis R encoder connector Driver Connector -2 to own servo controller board -2 to I/O board -1 to GP

Axis A Encoder Connector -5 GND -3 to own servo controller board -1 to servo controller board Axis X -1 unconnected -1 axis R encoder connector -1 to G connector Driver Connector -2 to own servo controller board -2 to I/O board -1 to GP

Other connectors GP -1 to each Driver Connector -1 to Con G -1 to Con 8 Con G [Gripper?] -2 GND -8 to CPU board -8 to I/O board -1 to Axis A Encoder Connector -2 to each servo controller card -1 to GP -3 to Con 9 -unconnected Con 6 -3 GND -1 to a capacitor -2 to a diode -2 to Con G -1 to itself -1 to Axis A Encoder Connector -2 to CPU board -2 to I/O board -1 to each servo controller board Con 8 -5 to I/O board -1 to GP -1 unconnected Con 9 -2 to each servo controller board (8 total connections: 4 individual pins to each + 1 pins to all 4) -1 to Con 9 -2 to Con G -1 to its own pin (that connects to all 4 servo controller boards) Con SE -4 GND -8 to I/O board -3 unconnected