Outline; Image Reading/Processing System - Canon SmartBase PC1200s Service Manual

2 Image Reading/Processing System

2.1 Outline

The image reading/processing system consists of the following major components:
• contact sensor used to read originals
• reader motor, drive pulley, drive belt, carriage, and carriage rail used to move the con-
tact sensor
• The analog processor PCB is used to convert the analog image data colleted by the
contact sensor into digital image data.
The image reading mechanism is controlled based on the drive signals from the image
processor PCB, thereby moving the contact sensor to read the original placed on the
copyboard glass. (F04-201-01)
When the ADF is used, the contact sensor is moved to stream reading position, and the
originals are read when they are moved by the ADF.
Analog processor PCB
Contact sensor
home position sensor
Reader motor
COPYRIGHT © 2001 CANON INC.
Contact sensor
Drive belt
Drive belt
Drive pulleys
F04-201-01
2000 2000 2000 2000 CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001
CHAPTER 4 OPERATION
Stream reading position
with ADF in use
Carriage
(reverse)
Carriage rail
Drive pulley
(forward)
4-13