The Print Has White Spots (Vertical); The Print Has White Lines (Vertical) - Canon Image Reader-A1 iR5000i Service Manual

3.10 The print has white spots (vertical)

3.11 The print has white lines (vertical)

Reader unit
1) Does the problem occur only in copy images?
YES: The cause is in the reader unit. Check the following:
1.
2.
3.
Fixing assembly
2) Generate test print TYPE [00]. Turn off the main power switch immedi-
ately before the paper enters the fixing assembly, and check the image. Is it
normal?
YES: The cause is in a process after the fixing system. Check the follow-
1.
Photosensitive drum
3) Are there scratches in the peripheral direction of the surface of the pho-
tosensitive drum that match the image?
YES: Find out the cause of the scratches, and replace the photosensitive
Developing assembly
4) Is the surface of the developing cylinder coated with an even layer of
toner?
NO:
Transfer/Separation charging assembly, Pre-transfer charging assembly
5) Clean the pre-transfer charging assembly and the transfer/separation
charging assembly. Is the problem corrected?
YES: End.
NO:
COPYRIGHT © 2001 CANON INC.
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Standard white plate (back of copyboard glass) for dirt
Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ.
Execute the following in service mode:
COPIER>FUNCTION>CCD>SH-PS-ST.
ing:
Fixing assembly upper roller for offset
drum.
Check the edge of the blade of the developing assembly for paper
lint or the like.
Try changing the setting of the following in service mode:
COPIER>OPTION>BODY>FUZZY.
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001
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