Controlling The Scanner Motor - Canon iR7086 Series Service Manual

The following shows the components associated with the scanner drive system:
[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

iR7105 / iR7095
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
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 325 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.
ERROR CODE:
E202 (HP detection error)
[1]
Reader
Interface
controller
PCB
PCB
[2]
Reader controller PCB
J202
J205
[1]
CPU
[1] Scanner motor control signal
Start position
Image leading edge
HP
Acceleration
[1] [2]
Shift distance
[1] acceleration interval: accelerates to scanning speed.
[2] run-up interval: servers as a margin to ensure stable speed
[3] image read interval: reads the image at a specific speed
[4] deceleration interval: decelerates at the end of the image and stops.
Scanner motor
Light-blocking plate
(forward)
(reverse)
Scanner
HP sensor
No.2 mirror base
F-5-15
Interface PCB
+24V/15V
J303
J302
A
A*
Motor driver
B
B*
F-5-16
Constant speed
[3]
F-5-17
Scanning lamp
No.1 mirror base
Scanner motor
J306
M501
3
1
4
5
2
6
Image end Stop
Deceleration
[4]
Chapter 5
0010-7887
5-9