Canon iR3570 Series, Service Manual

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Chapter 4
4-1
4.1 Construction
4.1.1 Construction and Mechanisms
0006-6582
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 /
The machine's main controller block consists of the following and has the following functions:
T-4-1
F-4-1
4.1.2 Construction and Functions
0008-8054
iR2230 / / iR3530 /
The machine's main controller block consists of the following components arranged as shown:
T-4-2
Item Description
Main controller PCB 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.
SRAM Retains service mode settings (by SRAM), HDD
management information
Image memory (SDRAM) Temporarily retains image data (256 MB; 512 MB
max.)
BOOTROM Stores boot program
HDD Stores system software, retains image data for
Box/Fax function (20 GB)
USB port USB2.0 interface
Ethernet port (10/100Bsae-T) Ethernet interface
Item Description
Main controller PCB 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
SRAM retains service mode settings and HDD management
information (SRAM)
Image memory (SDRAM) temporarily retains image data
256 MB
BOOTROM stores boot program
HDD (optional) stores system software
stores image data for Box/Fax functions
20 GB
USB port USB2.0 interface
Main controller PCB
USB port
Riser board
Boot ROM SRAM
Ethernet
10/100BASE-T
Hard disk drive
DC controller PCB
Reader unit
Image memory (SDRAM)