Controls; Controlling The Scanner Drive System - Canon imageRUNNER 1750 Series Service Manual

2
Technical Explanation > Original Exposure and Feed System > Controls > Controlling the Scanner Drive System

Controls

■ Controlling the Scanner Drive System

● Overview
Parts configuration of scanner drive is described below.
Reader controller PCB (PCB3)
ADF open/closed
detection sensor (PS23)
Sensor light-blocking plate
CIS HP sensor (PS24)
Carriage rail
• Reader motor (M10) drive signal
Controls the rotation and its direction and speed of motor.
• CIS HP sensor (PS24)
Detects that the contact image sensor (CIS) is at the home position.
• ADF open/closed detection sensor (PS23)
Detects the open or close status of the ADF.
2 Technical Explanation > Original Exposure and Feed System > Controls > Controlling the Scanner Drive System
Reader motor (M10)
Carriage drive belt
Forward
Reverse
Carriage
Contact image sensor (CIS)
F-2-18
● Reader Motor Control
Reader motor driver (IC15) turns on/off the reader motor (M10) and controls its direction and
speed of rotation according to the signals from ASIC (IC1).
Reader controller PCB
3.3V 1.8V
OM_RTPA
OM_RTPAN
OM_RTPB
IC1
OM_RTPBN
ASIC
OM_PS
OM_CURRENT
Note:
The scan speed is 160 mm/sec.
2-11
+5V +24V
J905
B*
1
IC15
B
2
Motor
A M10
3
driver
A*
4
F-2-19
2-11