The SDU-1 board was used in every single one of Game Plan's games.. this New Design board will replace an original SDU-1 in them all.

Used in: Agents 777, Andromeda, Attila the Hun, Black Velvet, Camel Lights, Chuck-A-Luck, Captain Hook, Cyclopes, Family Fun!, Foxy Lady, Lady Sharpshooter, Loch Ness Monster, Mike Bossy, Old Coney Island!, Pinball Lizard, Real, Rio, Sharp Shooter II, Sharpshooter, Star Trip, Super Nova, and Vegas

There is a TVS diode on the board to protect against a bad diode on a coil.. if you do not have a diode or it became defective, the board will soldier on as if nothing happened.

Quick drop in replacement, no instructions needed on this one.