Outline of Electrical Circuitry canon copier service

The major mechanism of the controller block are controlled by the CPU on the main controller
PCB. The CPU, such ICs as RAM and DIMM used in association with the CPU, and hardisk drive have the following functions:

CPU

• Controls image processing of input image data from the reader unit.

RAM

• Controls image processing of output image data to the printer unit.
• Controls the hard disk drive.
• Controls the network interface, DMA controller, PCI interface, and ROM-
RAM interface.
• Controls the RAM interface.

RAM

• Temporarily stores program data and image data.

DIMM-ROM
• Stores the system control program.
• Stores the boot program.

by canon copier service