Construction And Functions - Canon iR4570 Series Service Manual

Chapter 4
Reader unit
DC controller PCB Main controller PCB
SRAM
F-4-1

4.1.2 Construction and Functions

/ iR3530
The machine's main controller block consists of the following components arranged as shown:
Main controller PCB
4-2
Riser board
Boot ROM Hard disk drive
Item
SRAM
Image memory (SDRAM)
BOOTROM
Image memory (SDRAM)
USB port
Ethernet
10/100BASE-T
T-4-2
Description
controls system; controls memory; controls
printer output image
processing control, reader image input
processing, rendering processing; controls
color LCD controller, card reader interface;
controls fax image processing
retains service mode settings and HDD
management information (SRAM)
temporarily retains image data
128 MB (256 MB max.)
stores boot program
0008-8054