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COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 MAIN CONTROLLER
2-2 S
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 CPU, RAM, DIMM, and the ICs and HDD around the CPU have
the following functions:
1.2.2 Main Controller PCB
Name Description
CPU • Controls the processing of image data from the reader unit.
• Controls the processing of image data to the printer unit.
• Controls the HDD.
• Controls the interface of the following: network, DMA controller, PCI,
and ROM/RAM.
RAM • Stores program data and image data temporarily.
DIMM-ROM • Stores the system control program.
• Stores the boot program.
T02-102-01
1.2.3 HDD
Item Description
HDD • Sores the system software.
• Stores image data for the Box function.
T02-102-02