A20B-1003-0090 Fanuc servo control board for the Fanuc S Series AC Servo Unit. This board is in stock fully tested as a S series digital single axis command pcb in which DNC can offer immediate service exchange - shipping out today to anywhere in the world, as well as offer full testing and repair services upon the A20B-1003-0090 Fanuc servo boards. The small drive base units from the S series are also supported by DNC, as well as transistor modules and fuses.