Enlargement/Reduction; Changing The Magnification In Main Scanning Direction; Varying The Magnification In Sub Scanning Direction - Canon iR4570 Series Service Manual

Chapter 5
Ideal output characteristics
Output
Input
F-5-14
Be sure to correct the output among the channels using the following service mode items:
-if you have replaced the contact image sensor (CIS) and, as a result, a discrepancy occurs in the output of image
density among channels; or
-if the setting of CCD-LUT is other than '0' and you have replaced the reader controller PCB.
<Service Mode>
for CIS unit gain correction data
COPIER>OPTION>BODY>CCD-LUT
for CCD gain correction
COPIER>FUNCTION>CCD>LUT-ADJ2
(using the D-10 Chart)

5.3.3 Enlargement/Reduction

5.3.3.1 Changing the Magnification in Main Scanning Direction

iR2270 / iR2870 / iR3570 / iR4570
In Book Mode/ADF Mode
The image is read at 100% in main scanning direction, and the magnification is varied by processing the data on the
main controller PCB.

5.3.3.2 Varying the Magnification in Sub Scanning Direction

iR2270 / iR2870 / iR3570 / iR4570
5-14
Actual output characteristics
CCD channel x 8
0006-5724
0006-5725