Various Control; Controlling The Scanner Drive System; Outline; Reader Motor Control - Canon iR2422 series Service Manual

Chapter 4
1. Moves to the start position
after black shading/white shading.
2. Original scan
3. Moves to the standby position

4.3 Various Control

4.3.1 Controlling the Scanner Drive System

4.3.1.1 Outline

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.

4.3.1.2 Reader Motor Control

4-10
Original glass reading
start position
Reader controller
PCB
Original glass
cover open/close
sensor (SR402)
[3]
[2]
CISHP sensor (SR401)
CISHP
sensor
Shading Leading edge
HP
position of original
F-4-10
Reader motor
[1]
Sensor
shading
plate
Backward
movement
Guide shaft
F-4-11
Trailing edge
of original
Carriage drive belt
Forward
movement
Carriage
Contact image
sensor (CIS)
0020-4231
0020-4232