Construction; Specifications, Control Methods, And Functions; Major Components - Canon iR2020 Series Service Manual

4.1 Construction

4.1.1 Specifications, Control Methods, and Functions

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
Major specifications, control methods, and functions of the original exposure system are summarized below.
Item
Exposure light source
Original scan
Scan resolution
Gradation
Carriage position
detection
Magnification range
Lens
CMOS sensor
CIS drive control
Original size detection
*1 The control method depends on the magnification. For more details, refer to "Magnification Change".

4.1.2 Major Components

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
Major components of the original exposure system are as follows:
[1]
[2]
[3]
[4]
[5]
Function/Method
LED
In BOOK mode: Original scan is performed by moving the contact image sensor (CIS).
When ADF is used: Original stream reading is performed with the contact image sensor
(CIS) fixed.
600 dpi (vertical scan) x 600 dpi (horizontal scan) (Color send: 300 dpi horizontal scan)
256
Contact image sensor (CIS) HP sensor (SR401)
50% to 200%
Vertical scan direction:
Horizontal scan direction:
BOOK mode:
Rod lens array
Number of lines: 1
Number of pixels: Total 7488 (incl. 7176 effective pixels)
Maximum original scan width: 304 mm
Drive control by reader motor (M401)
[1] BOOK mode:
Vertical scan direction:
Horizontal scan direction: Detection by reflection type sensor (AB/INCH)
[2] When ADF is used
Width:
Length:
[3]
[2]
[1]
[12]
[7]
[11]
Component
Copyboard cover open/close
sensor (Rear: SR402)
Reader controller PCB
Original sensor 3
Original sensor 4
Original sensor 5
T-4-1
Image processing is by image processor PCB
Carriage movement speed change and image
processing by image processor PCB *1
Original feed speed change and image processing by
ADF mode:
image processor PCB *1
Detection by reflection type sensor (AB/INCH)
Detection by original width sensor PCB in ADF
Detection by photo sensor in ADF
[5]
[6]
[4]
[10]
F-4-1
T-4-2
No. Function/Specification
SR402 Photo interrupter: Detects the copyboard cover open/
close status. Starts detecting the original size when the
copyboard cover angle is 30 deg.
- Controls drive of the reader unit and image processing.
SR406 Detects the original size (for all destinations).
SR407 Detects the original size (AB, INCH/AB).
SR408 Detects the original size (INCH/A)
[7]
[8]
[9]
Chapter 4
0010-4242
0010-4243
4-1