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

14.1.10 Making Checks on the Scanner Side (Checking the Density Slope)
/ iR8070

14.1.11 Making Checks on the Scanner Side (Checking for fogging)

/ iR8070
Is there
a difference in density
between front and
rear?
YES
Clean the mirrors.
Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ
Is there
a difference in density
between front and
rear?
YES
Go to
"Checking the Density Slope"
on the printer side.
Is the
image of gray Scale
No. 1 (solid black) copied of the
NA3 Chart in text mode
too light?
YES
Check the life of the
scanning lamp; if its
end is reached,
replace it.
Clean the following:
1. Mirrors
2. Lens
3. Standard white plate
4. Scanning lamp
5. Reflecting plate
Execute potential
control.
Turn off and then on
the power switch, and
make a copy.
Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ
Is gray scale
No. 1 (solid black) too
light?
YES
Go to
"Checking the Solid Black"
on the printer side.
NO
Go to
"Checking the Solid Black"
NO
F-14-9
NO Go to
"Checking for fogging"
NO
F-14-10
Chapter 14
0008-9665
0008-9666
14-7