The Output Has Vertical Fogging; The Output Has Black Lines (Vertical, Fuzzy, Thick) - Canon iR105 Service Manual

CHAPTER 6 TROUBLESHOOTING

3.3.7 The output has vertical fogging

3.3.8 The output has black lines (vertical, fuzzy, thick)

Scanner (dirt)
1) Does the problem occur only in copy images?
YES: The cause is between scanner and CCD. Perform the following:
Potential control system
2) Set the following in service mode to '0' to turn off potential control:
YES: the cause is in the potential control system. Make checks as in-
Primary charging assembly
3) Clean the primary charging wire, grid wire, and shielding plate. Is
YES: End.
Pre-exposure lamp
4) Clean the pre-exposure lamp. Is the problem corrected?
YES: End.
Fixing assembly
5) Using the door switch actuator, make a copy with the front cover
YES: The cause is after the fixing system. Check the fixing assembly up-
Development
Drum cleaner unit
6) Is the surface of the developing cylinder coated with an even layer
NO:
YES: [1] Remove the drum cleaning blade, and check the edge.
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[1] Check the scanning lamp for print and the end of its life.
[2] Check the reflecting plate, mirrors, lenses, and standard white
plate for dirt.
COPIER>OPTION>BODY>PO-CNT. Is the problem corrected?
structed for checking the potential control system in Chapter 2
(standards and adjustments).
the problem corrected?
open. Turn off the power switch when the copy paper is in the feed-
ing assembly, and check the image. Is the copy image normal?
per/lower roller for dirt.
of toner?
[1] Check the edge of the blade of the developing assembly.
[2] Check to make sure that the front fixing plate of the develop-
ing magnet is secured in place.
[2] Check the drum cleaner unit.
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001