Service manual

Chapter 4
4-1
4.1 Construction
4.1.1 Major Components
0006-4039
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 contact 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.
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.
F-4-1
Analog processor PCB
Contact sensor
Drive belt
Drive pulleys
Drive pulley
Carriage rail
Reader motor
Contact sensor
home position sensor
(forward)
(reverse)
Stream reading position
with ADF in use
Carriage
Drive belt