Construction; 1Construction And Mechanisms - Canon iR4570 Series Service Manual

4.1 Construction

4.1.1 Construction and Mechanisms
iR2270 / iR2870 / iR3570 / iR4570
The machine's main controller block consists of the following and has the following functions:
Main controller PCB
Item
SRAM
Image memory
(SDRAM)
BOOTROM
HDD
USB port
Ethernet port (10/
100Bsae-T)
T-4-1
Description
Controls system operation, memory,
printer unit output, image processing,
printer unit image input processing,
rendering, color LCD
controller, card printer unit interface, fax
image
processing, etc.
Retains service mode settings (by
SRAM), HDD management information
Temporarily retains image data (256 MB;
512 MB max.)
Stores boot program
Stores system software, retains image
data for
Box/Fax function (20 GB)
USB2.0 interface
Ethernet interface
Chapter 4
0006-6582
4-1