Various Control; Controlling The Scanner Drive System; Outline - Canon iR2020 Series Service Manual

Reader motor
(M401)
LED
CISHP sensor
(SR401)

4.3 Various Control

4.3.1 Controlling the Scanner Drive System

4.3.1.1 Outline

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
The machine's scanner system consists of the following components:
Original glass
cover open/close
sensor (SR403)
[1] Reader motor (M401) drive signal
Controls rotation/stop and rotational direction/speed of the reader motor.
[2] Contact image sensor (CIS) HP sensor (SR401) signal
Detects that the contact image sensor (CIS) is at the home position.
[3] Copyboard cover sensor (SR403 (front)/SR402 (rear)) signal
Detects the open/close status of the copyboard cover.
Start key
ON
STBY
Shading
Stream reading
position
Stream reading
start position
1. Black shading/
White shading/
Original scan
Reader controller
PCB
Original glass
cover open/close
sensor (SR402)
[3]
[2]
CISHP sensor (SR401)
Black shading/White shading
SCRW SCFW
Trailing edge
position of original
F-4-8
CS HP
sensor
Original glass
reading start
position HP
F-4-9
Reader motor
[1]
Backward
movement
Guide shaft
F-4-10
STBY
Shading
position
: Forward movement
: Backward movement
Shading
position
Carriage drive belt
Sensor
shading
plate
Forward
movement
Carriage
Contact image
sensor (CIS)
Chapter 4
0010-4249
4-5