Making Checks On The Scanner Side(Checking Halftone Density) - Canon ImageRunner iR8500 Series Service Manual

14.1.17 Making Checks on the Scanner Side(Checking Halftone Density)

iR105i/iR105+ / iR9070
Make a copy
YES
of the NA3 Chart in text mode.
Is the white background
foggy?
NO
Make a copy
YES
of the NA3 Chart in AE mode.
Is the white background
foggy?
NO
Go to NO
"Checking
Halftone Density"
F-14-16
Make a copy
of the A3 Chart in text/photo
mode. Is the density of No. 8 proper as
compared with No. 7 through
No. 9 of the Test
Chart?
NO
If too light,
Increase the value of the
following in service mode:
COPIER>ADJUST>DENS>
DENS-ADJ.
Make a copy of the A3
Chart in text/photo
mode.
Does the
density of gray scale
No. 8 (halftone)
YES
change?
NO
Go to
"Checking Halftone Density"
on the printer side.
F-14-17
Execute the following in service mode:
1. COPIER>FUNCTION>CCD>CCD-ADJ
2 COPIER>FUNCTION>CCD>LUT-ADJ
Is the
Go to
NO
white background
"Checking for Fogging"
foggy?
on the printer side.
YES
Increase the value in the following
service mode: COPIER>ADJUST>CCD-
SH-TRGT (max. at 160).
Execute the following service mode:
1. COPIER>FUNCTION >CCD>CCD-ADJ
2. COPIER>FUNCTION>CCD>LUT-ADJ
Is the
white background
foggy?
YES
Decrease the value in the following
service mode:
COPIER>ADJUST>AE>AE-TBL.
YES
End.
If too dark,
Decrease the value of the
following in service mode:
COPIER>ADJUST>DENS>
DENS-ADJ.
Chapter 14
0008-3714
14-11