Outline Of Operation; Outline - Canon iR1600 Service Manual

1 Outline of Operation

1.1 Outline

The image reading/processing system has the following major functions:
Item
Original exposure
Original scanning
Original size detection
Enlargement/
reduction (zoom)
Lens
Contact sensor
Contact sensor unit
drive control
Contact sensor unit
position detection
Shading correction
Auto density correction
COPYRIGHT© 2002 CANON INC.
CHAPTER 3 IMAGE READING/PROCESSING SYSTEM
Indirect exposure by LEDs (LEDs + photo conducting me-
dium)
Book mode: scanning by moving carriage
ADF mode: stream reading by fixed carriage
Book mode: detection by reflection type sensor (in models
equipped with original size sensor)
ADF mode: detection by ADF
Between 50% and 200% (in 1% increments)
Main scanning direction : image processing by image processor
Sub scanning direction :
Book mode : by varying speed of carriage
ADF mode : by varying speed of original
Rod lens array
Number of lines : 1 (7084 pixels)
Maximum original reading width : 299.8 mm
Control by reader motor (M103)
By CS unit HP sensor (PS113)
Reading in units of 10 bits, output in units of 8 bits
Correction on all black/white pixels
Executed at the start of a read job.
By ABC (auto background control)
Executed for every line in main scanning direction
(Executes density correction for every line in main scanning di-
rection, and consists in a single scan.)
T03-101-01
2000 CANON iR1600/iR2000 REV.1 JAN. 2002
Description
3-1