FANUC A16B-2200-0120 15 Base 0 PCB. This CPU / memory PCB is fitted with 512Kb of RAM and a CRT output. While also offering Fanuc 15M, 15MA, 15T, 15TA, system testing, either as part or as the complete control. Normal faults for this board are the RAM Parity Base 0; but can be a red herring if the parameters are not installed properly.
DNC carry stock of this A16B22000120 base 0 board for the Fanuc 15A series controls. This board normal faults include various ram parity alarms, though can be complicated if the system is a 15-TF.