FANUC A16B-2203-0190/04A The FANUC A16B-2203-0190/04A is a circuit board from FANUC. Circuit boards, also known as printed circuit boards (PCBs), are essential components in electronic systems. They provide the connections and physical support for electronic components like resistors, capacitors, integrated circuits, and transistors. The A16B2203019004A is designed for use in FANUC industrial equipment, likely within CNC machines or robotic systems, where it controls specific functions.