Liftmaster 41A5689 Receiver Logic Control Board Assembly for Garage Operators
41AC050-1M, 41AB050-1, 41A5483-1C-315, 41AC050-1, 41A5689. Compatible with Liftmaster 3245, 3245M, 3255, 3255M and 3270 models. For use with various 1/2HP LiftMaster® and Chamberlain® AC Chain Drive Garage Door Openers; manufactured after 2005.