Its a zenith 52" rear projection. I am using the service knobs on the board that flips out from the bottom center of the tv behind the speake baffels. It has a set of gree, red, and blue knobs for each color but I cannot get it right. Been doing it for a year now. I am ready to chuck it. Anyone want it? Sell for 50 bucks. Pick up only. Pm me if u want it. Works but needs convergence done.