Canon imageRUNNER 5065 series Service Manual page 419

<Making Image Initial Checks>
Are there vertical
lines in the images?
YES
Clean the following:
1. Mirrors
2. Lens
3. Standard white plate
(mounted to back of
copyboard glass)
4. Copyboard glass
Execute shading in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ
<Checking the Solid Black
Make a copy of
the NA3 Chart in text mode. Is
E
gray scale No. 1 (solid black)
too light?
YES
Check the life of the
scanning lamp; if it has
reached the end of its
life, replace it.
Clean the following:
1. Mirrors
2. Lens
3. Standard white plate
4. Scanning lamp
5. Reflecting plate
Executing Potential Control
Turn off and then on the power switch; then,
make a copy.
Execute shading adjustment in service
mode:
COPIER>FUNCTION>CCD>CCD-ADJ.
Is the density of
gray scale No. 1 (solid black)
too low (light)?
YES
Perform the instructions under
"Checking the Solid Black Density"
for the printer unit.
<Checking the Density Slope>
Is there a difference
NO
in density between
front and rear?
YES
Clean the mirrors.
Execute shading in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ
Is there a
difference in density
between front
and rear?
YES
Perform the instructions under
""for the printer unit.
F-14-6
Density>
<Checking for Fogging>
Make a copy of
NO
the NA3 Chart in text mode.
Is the white background
foggy?
NO
G
Make a copy of the
NA3 Chart in AE mode. Is the
output foggy?
NO
NO
F-14-7
NO
E
NO
YES
F
YES
H
J
K
L
Chapter 14
14-5