Outline Of The Electrical Circuit; Outline; Main Controller Pcb; Hard Disk Drive - Canon iR8500 Service Manual

CHAPTER 3 MAIN CONTROLLER

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

Name
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
T02-102-01 Functions of the Control Components

1.2.3 Hard Disk Drive

Name
HDD • Stores the system software
• Stores image data for the Box function
3-2
T03-102-02
COPYRIGHT© 2001 CANON INC.
Description
Description
2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001