Outline Of The Electrical Circuitry; Outline; Main Controller Pcb; Hard Disk Drive - Canon iR105 Service Manual

CHAPTER 3 MAIN CONTROLLER

1.2 Outline of the Electrical Circuitry

1.2.1 Outline

The major electrical mechanisms of the controller block are controlled by the CPU on the
main controller PCB; the following table shows the functions of the IC and hard disk lo-
cated around the CPU (e.g., RAM, DIMM) and of the CPU itself:

1.2.2 Main Controller PCB

Name
CPU • Controlling image processing of input image data from the reader unit
• Controlling image processing of output image data to the printer unit
• Controlling the hard disk drive
• Controlling the following: network interface, DMA controller, PCI interface,
ROM/RAM interface
RAM • Storing temporarily program data and image data
DIMM-ROM • Storing the system control program
• Storing the boot program

1.2.3 Hard Disk Drive

Name
HDD • Storing system software
• Storing image data for the box function
3-2
Description
T03-102-01 List of Functions
Description
T03-102-02
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001