Fanuc A16B-3200-0020 Main CPU Board. This system Masterboard or MAIN PCB is the processor control card for the complete system 21B, 21-TB, 21-MB, etc. control series.
DNC carries the A16B32000020 MAIN card in stock. Further a complete 21-B control system allows testing of this PCB to check various issues. From a dead system, through power supply problems, memory related issues such as DRAM, SRAM, FROM and PMC rom concerns and beyond. This board is twinned with a combination PCB which is a I/O with a piggy backed PSU screwed to it.