Canon iR6570 series, Service Manual

Page: 144 / 684

Chapter 5
5-6
5.3 Various Control
5.3.1 Controlling the Scanner Drive System
5.3.1.1 Overview
0008-7502
The following shows the components associated with the scanner drive system:
F-5-9
[1] Scanner Motor M501 Drive Signal
starts/stops the motor; controls the direction and speed of its rotation
[2] Scanner HP Detection Signal
detects the presence of the No. 1 mirror base at home position
5.3.1.2 Controlling the Scanner Motor
0008-7503
The configuration of the system used to control the scanner motor is as follows; the motor driver on the interface PCB operates according to the signals
from the CPU to start/stop the scanner motor and to control the direction and speed of its rotation
F-5-10
a. Reverse Movement After a Scan
After an image scan, the No. 1 mirror base is moved in reverse as far as the shading position at 234 mm/sec regardless of the selected magnification.
b. Forward Movement During a Scan
During an image scan, the No. 1 mirror base is controlled at the speed indicated in the following figure; the No. 1 mirror base is moved forward at 325
mm/sec for 100% magnification.
[1]
[2]
Reader
controller
PCB
Interface
PCB
(forward)
(reverse)
Scanner motor
Light-blocking plate
No.2 mirror
base
Scanning
lamp
No.1 mirror base
Scanner
HP sensor
Reader controller PCB
Motor
driver
Interface PCB
+24V/15V
J306
A
A*
B
B*
CPU
1
2
3
4
6
5
J308
J307 J202
J203
Scanner
motor
M501
[1]
[1] Scanner motor control signal