Canon iR8500 - Outline of the Electrical Circuit; Hard Disk Drive; Main Controller PCB; Outline

CHAPTER 3 MAIN CONTROLLER
3-2
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
1.2 Outline of the Electrical Circuit
1.2.1 Outline
The major electrical mechanisms of the controller unit are controller by the CPU on the
main controller PCB; the following table shows the functions of the CPU, RAM, DIMM,
IC, and hard disk located near the CPU:
1.2.2 Main Controller PCB
T02-102-01 Functions of the Control Components
1.2.3 Hard Disk Drive
T03-102-02
Name Description
CPU • Controls the image data (input) from the reader unit
• Controls the image data (output) to the printer unit
• Controls the network interface, DMA controller, PCI interface, ROM and RAM
interface
RAM • Stores program data and temporarily stores image data
DIMM-ROM • Stores the system control program
• Stores the boot program
Name Description
HDD • Stores the system software
• Stores image data for the Box function