Canon ImageRunner 600 Service Manual page 576

4 Checking the Scanner Side
<Making Image Initial Checks>
Are there
NO
vertical lines in the
image?
YES
Clean the following:
[1] each mirror
[2] lens
[3] standard white plate
[4] copyboard glass
Execute
COPIER>FUNCTION>CCD>CCD-ADJ
in service mode.
<Checking Halftone Density>
B
When
the A3 Chart
is copied in text/photo
mode, is the density of No. 8 optimum
when compared with Nos. 7
through 9?
If it is too dark,
NO
If it is too light,
Decrease the setting of the
Increase the setting of the
following in service mode: following in service mode:
COPIER>ADJUST>DENS COPIER>ADJUST>DENS
>DENS-ADJ
>DENS-ADJ
Make one copy of
the A3 Chart in
text/photo mode.
Is the
density of gray scale
No. 8 (halftone)
YES
different?
NO
Go to "Checking the Halftone Density" for the printer side.
13-4-3
<Checking the Density Slope>
Is there
NO
a difference in density
between front and
rear?
YES
Check to see if the
standard white plate is
mounted correctly.
If it is not firmly in
contact, correct it.
Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ
Is there
NO
a difference in
density between
front and
YES
rear?
End.
YES
Go to "Checking the Density
Slope" for the printer side.
<Checking Solid Black Density>
Copy
the NA3 Chart in
NO
text mode. Is the density
of gray scale No. 1 (solid
black) too low
(light)?
YES
Check the life of the
scanning lamp. If it has
reached the end of its
life, replace it.
Clean the following:
[1] each mirror
[2] lens
[3] standard white plate
[4] dust-proofing glass
[5] scanning lamp
[6] reflecting plate
Executing Potential
Control
NA3 Chart in AE mode. Is the
Turn off and then on the power
switch, and make one copy.
Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ
Is gray scale
NO
No. 1
(solid black) too
low (light)?
YES
Go to "Checking the Solid Black
Density" for the printer side.
<Checking Fogging>
Copy the
NA3 Chart in
YES Execute the following in service mode:
text mode. Is the
COPIER>FUNCTION>CCD>CCD-ADJ
background
foggy?
NO
Is the background foggy?
YES
Increase the setting of the following
in service mode:
COPIER>ADJUST>CCD>SH-TRGT.
(Be sure to limit it to 40 max.)
Copy the
YES Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ
background
foggy?
NO
Is the
NO
B
background foggy?
YES
Decrease the setting of the
following in service mode:
COPIER>ADJUST>AE>AE-TBL
COPYRIGHT © 2000 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
NO
Go to "Checking
Fogging" for the
printer side.