Filter
Top Products
COPYRIGHT
©
2000 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
3 Checking the Printer Side (2/2)
Is there fogging?
Is the reading
of 'VDM' between
432 and 452?
Is the
reading of 'VL1M'
between 62 and
82?
Check the following; if
faulty, replace parts as
necessary.
[1] laser output
[2] potential control system
Decrease the setting of
ADJUST>DEVELOP>DE-OFST in
service mode.
• A lower setting will result in a
lower density (lighter image).
<Checking Fogging>
<Checking Halftone Density>
NO
YES
NO
YES
NO
YES
Check PG6 (blank).
Check PG4 (halftone).
End.
Select
COPIER>DISPLAY>DPOT>VDM
in service mode.
Select
COPIER>DISPLAY>DPOT>VL1M
in service mode.
A
Compare
against Nos. 6 and 7
(halftone) of the Test Chart.
Is the density about
the same?
NO
YES
Check the potential
control system; if
normal, replace the
photosensitive drum.
VD-OFST
VL-OFST
Default
To make the
image lighter
To make the
image darker
DE-OFST
Default
To make the
image lighter
To make the
image darker
0
0
-40 -30 -20 0 +20 +30 +40
-4 -3 -2 +2 +3 +4
+4 +3 +2 -2 -3 -4
Execute service mode as follows:
1) Change the setting of the following according to the table:
ADJUST>V-CONT>VD-OFST and ADJUST>V-CONT>VL-
OFST.
2) If the image density is not satisfactory after performing step
1), change the following according to the table:
ADJUST>DEVELOP>DE-OFST
13-4-2