Various Control; Controlling The Scanner Drive System; Overview; Scanner Motor Control - Canon iR3245 Series Service Manual

Chapter 5

5.3 Various Control

5.3.1 Controlling the Scanner Drive System

5.3.1.1 Overview

iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
Parts configuration of scanner drive is described below.
Copyboard
cover sensor (SR3)
Copyboard cover
sensor
[1] Reader motor (M1) drive signal Turns on/off the motor and controls its direction/speed of rotation.
[2] CCD unit HP sensor (SR1) detection signal Checks if CCD is at home position.
[3] Copyboard cover sensor (front: SR2/rear: SR3) detection signal Detects the open/close status of the copyboard cover

5.3.1.2 Scanner Motor Control

iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
Reader motor driver turns on/off the motor and controls its direction/speed of rotation according to the signals from CPU.
MEMO:
The scanning speed of this machine is as follows.
Black/white (600 x 600 dpi): 51 ipm (260 mm/s)
Color (600 x 600 dpi): 25 ipm (130 mm/s)
(600 x 300 dpi): 51 ipm (260 mm/s)
5-6
Reader controller
PCB
LED driver
PCB
[3]
[2]
(SR2)
CCD unit HP sensor (SR1)
Reader controller PCB
3.3V
OPT_M_EN
OPT_M_CLK
OPT_M_CW/CCW
CPU
OPT_M_VREF
Scanner motor(M1)
Carriage drive belt
[1]
Sensor light
block plate
Backward
Guide shaft
F-5-7
+5V +24V
J8
A*
1
B*
Motor
2
A
driver
3
B
4
F-5-8
Forward
CCD unit
M1
0019-4639
0019-4640