The Print If Foggy Vertically; The Print Has Black Lines (Vertical, Blurred, Thick) - Canon Image Reader-A1 iR5000i Service Manual

3.7 The print if foggy vertically

3.8 The print has black lines (vertical, blurred, thick)

Reader unit
1) Does the problem occur on copy images only?
YES: The cause is in the reader unit. Check the following:
1.
2.
3.
Fixing assembly
2) During printing, turn off the main power switch while paper is in the
feeding assembly; then, check the image on the paper. Is it normal?
YES: The cause is in a process after the fixing system. Check the follow-
1.
2.
Potential control system
3) Set '0' to the following in service mode to turn off potential control:
COPIER>OPTION>BODY>PC-CNT. Is the problem corrected?
YES: The problem is in the potential control system. Make checks for
Primary charging assembly
4) Clean the primary charging wire, grid wire, and shielding plate. Is the
problem corrected?
YES: End.
Pre-exposure lamp
5) Clean the pre-exposure lamp. Is the problem corrected?
YES: End.
Developing assembly, Photosensitive drum cleaner unit
6) Is the surface of the developing cylinder coated with an even layer of
toner?
NO:
1.
2.
YES:
1.
2.
COPYRIGHT © 2001 CANON INC.
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Scanning lamp for dirt and life
Reflecting plate, mirrors, lens, and glass for dirt
Standard white plate (back of copyboard glass) for dirt
ing:
Fixing assembly upper roller for dirt
Web for dirt
the potential control system in Chapter 3 "Standards and Adjust-
ments."
Check the edge of the blade of the developing assembly.
Check the surface of the developing cylinder.
Check the edge of the cleaning blade of the photosensitive drum.
Check the photosensitive drum cleaner unit.
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001
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