The Xerox DocuColor iGen3 is a CMYK perfecting, sheet fed digital press that prints direct-to-media at up to 6000 impressions per hour (A4/letter). It is a fully integrated advanced production printing system with breakthroughs in imaging, marking, consumables, registration, color management, and paper handling. This paper describes the novel xerographic architecture and associated subsystem technologies that deliver benchmark image quality consistently. It provides an overview of the process by which each four-color impression is built on a photoreceptor belt and then transferred to the paper in a single pass. The controls for maintaining consistent registration and excellent, stable color fidelity will also be described.