Construction; 1Specifications, Control Mechanisms, And Functions; Specifications, Control Mechanisms, And Functions - Canon iR4570 Series Service Manual

5.1 Construction

5.1.1 Specifications, Control Mechanisms, and Functions

iR2270 / iR2870 / iR3570 / iR4570
The major specifications, control mechanisms, and functions of the machine's original exposure system are as
follows:
Item
Original exposure
Original scan
Read resolution
Gradation
Scanning speed
(in ADF mode)
Carriage position
detection
Magnification
Lens
T-5-1
Description
by LED array, indirect (LED + photoconducting body)
in book mode: scan by moving contact image sensor (CIS)
in ADF mode: by original stream reading with contact image
sensor (CIS) fixed in position
600 (main scanning) x 600 (sub scanning) dpi
256
45 ipm (single-sided, A4/LTR)
by contact image sensor (CIS), HP sensor (PS503)
25% to 400%
Main Scanning by main controller PCB (image
Direction processing)
Sub Scanning
Direction
in book mode:
in ADF mode:
rod lens array
by changing carriage travel speed; by
processing images on reader controller
PCB; by processing images on main
controller PCB*1
by changing original feed speed; by
image processing on reader controller
PCB; by image processing on main
controller PCB*1
Chapter 5
0006-5712
5-1