Small molecule xanthine oxidase inhibitors are provided, as well as methods for their use in treating gout or hyperuricemia. The apparatus can operate in conjunction with decoder devices installed in set-top boxes, satellite receivers, TV broadcast channel servers, digital still cameras, DVD players and recorders, large screen TV sets, media players, and the like. Shifting the position between the target and the projection system to offset a second region to be illuminated from the first region. The function selection signal is random and is applied to the logic circuit, and the function selection signal is refreshed at determined instants for scrambling operation of the logic circuit. The backing plate is assembled on a rotatable shaft to be aligned with splines on the shaft to prevent axial removal of the backing plate without rotation thereof which is restricted due to a spline engagement between the backing plate and the shaft.