Digital copying machine and a digital copying machine system

摘要

The digital copying machine has a MBD that controls the overall device of the digital copying machine. The machine also has an LDU that controls a drawing laser with which an image is drawn onto a photoconductive drum, an SCU that controls a scanner, and a PCU that controls a control panel through which a user gives an instruction for an operation. These units are directly connected to the MBD by serial cables via their respective high performance serial interfaces.