Construction; Construction And Mechanisms; Construction And Functions - Canon iR3570 Service Manual

4.1 Construction

4.1.1 Construction and Mechanisms

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 /
The machine's main controller block consists of the following and has the following functions:
Reader unit
DC controller PCB Main controller PCB
Riser board
SRAM Boot ROM
F-4-1

4.1.2 Construction and Functions

iR2230 / / iR3530 /
The machine's main controller block consists of the following components arranged as shown:
Main controller PCB
Item
Main controller PCB
SRAM
Image memory (SDRAM)
BOOTROM
HDD
USB port
Ethernet port (10/100Bsae-T)
Hard disk drive
Item
SRAM
Image memory (SDRAM)
BOOTROM
HDD (optional)
USB port
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
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
256 MB
stores boot program
stores system software
stores image data for Box/Fax functions
20 GB
USB2.0 interface
Chapter 4
0006-6582
0008-8054
4-1