The Copy Has A Black Line (Vertical, Fine) - Canon iR8500 Servise Manual

3.3.9 The copy has a black line (vertical, fine)

Scanner (dirt)
1) Does the problem occur only in copy images?
YES: The cause is between the scanner and the CCD. Perform the fol-
Fixing system
2) Using the door switch actuator, make copies with the front cove
YES: The cause is after the fixing assembly. Check the following:
Primary charging assembly (dirt)
3) Clean the primary charging assembly. Is the problem corrected?
YES: End.
Photosensitive drum cleaner
4) Is there paper or foreign matter trapped on the cleaning blade of
YES: Remove the foreign matter, and clean the cleaning blade and the
5) Is there a scratch on the edge of the cleaning blade? (Put your fin-
YES: Use the edge that has not been used. (If both edges have a scratch,
Photosensitive drum, Developing assembly
6) Is there a scratch or a black line in the peripheral direction of the
YES: Replace the photosensitive drum. If a scratch is found, be sure to
NO:
COPYRIGHT© 2001 CANON INC.
lowing:
1. Check the standard white plate and mirrors for dirt.
2. Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ.
open. Turn off the power switch while copy paper is in the feeding
assembly, and check the image. Is the copy image normal?
1. Fixing assembly upper roller for scratches and black line
2. Web for dirt
3. Thermistor, separation claw for dirt, reciprocating movement
the cleaner assembly?
cleaner externals.
ger on the edge of the cleaning blade, and feel for a scratch.)
replace the cleaning blade.)
surface of the photosensitive drum?
find out its cause.
Check the development system.
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CHAPTER 6 TROUBLESHOOTING
CANON iR8500 REV.0 MAR. 2001
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