Construction; Specifications, Control Mechanisms, And Functions; Major Components - Canon iR3570 Service Manual

5.1 Construction

5.1.1 Specifications, Control Mechanisms, and Functions

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
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
CCD
CIS drive control
Original size
identification
The particulars of control differ depending on the selected magnification. For details, see "Changing the
Magnification."

5.1.2 Major Components

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
The machine's original exposure system consists of the following major components:
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 Direction by main controller PCB (image processing)
Sub Scanning Direction
in book mode: by changing carriage travel speed; by processing
images on reader controller PCB; by processing
images on main controller PCB*1
in ADF mode: by changing original feed speed; by image processing
on reader controller PCB; by image processing on
main controller PCB*1
rod lens array
number of lines: 1
Number of pixels: Total 7488 (Number of effective pixels: 7180)
maximum original read width: 304 mm
by reader motor (M501)
[1]Book Mode
in main scanning by reflection type sensor (AB/Inch)
direction:
in sub scanning direction: by reflection type sensor (AB/Inch)
[2]ADF Mode
width: by original width value in ADF
length: by photo sensor in ADF
Chapter 5
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