Canon iR4570 Series Service Manual page 169

Reader Unit
DC controller PCB Main controller PCB
SRAM
F-4-2
Item
HDD (optional)
USB port
Ethernet port
(10/100 Base-T)
Boot ROM Hard disk drive
(optional)
Description
stores system software
stores image data for Box/Fax functions
20 GB
USB2.0 interface
Ethernet interface
Image memory (SDRAM)
USB port
Ethernet
10/100BASE-T