Making Checks On The Printer Side (2/2) - Canon iR105 Service Manual

1.1.3

Making Checks on the Printer Side (2/2)

A
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001
<Checking for fogging>
Check PG6 (blank)
NO
Is the output foggy?
YES
Make the following in service
mode:
COPIER>DISPLAY>DPOT>VDM.
Check the potential
NO
Is the reading of
control system; if
<VDM> between 390
normal, replace the
and 460?
photosensitive drum.
YES
Make the following selections in
service mode:
COPIER>DISPLAY>DPOT>VL1M.
Check the following; if
faulty, replace it:
NO
Is the reading of
1. Laser output
<VL1M> between 50
2. Potential control
and 90?
system
YES
Decrease the value of the following
in service mode:
ADJUST>DEVELOP>DE-OFST.
n
A lower value makes images
lighter.
F06-101-03
CHAPTER 6 TROUBLESHOOTING
<Checking Halftone Density>
Check PG4 (halftone)
Compared with
YES
No. 6 and No. 7 (halftone),
End.
is the density about
the same?
NO
Set the following in service mode
to between 1 and 9:
ADJUST>DENS>DENS-ADJ.
n
A higher value makes images
darker.
6-5