COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
CHAPTER 6 TROUBLESHOOTING
6-84
3.3.10 The copy has white spots (vertical)
3.3.11 The copy has white lines (vertical)
Paper
1) Try fresh paper. Is the problem corrected?
YES: The paper is moist. Advise the user on the correct method of stor-
ing paper (place).
Dust-proofing glass
2) Clean the dust-proofing glass. Is the problem corrected?
YES: End.
Scanner (dirt)
3) Does the problem occur only in copy images?
YES: The cause is between the scanner and the CCD. Perform the fol-
lowing once again:
1. Check the standard white plate for dirt.
2. Execute the following service move:
COPIER>FUNCTION>CCD>CCD-ADJ.
Photosensitive drum
4) Is there a scratch in the peripheral direction of the surface of the
photosensitive drum corresponding to the problem in the image?
YES: Be sure to find out the cause of the scratch, and replace the photo-
sensitive drum.
Developing assembly
5) Is the developing cylinder coated with an even layer of toner?
NO: 1. Check to see if there is a collection of paper lint on the edge of
the blade of the developing assembly.
2. Check to make sure that the connector at the front of the devel-
oping assembly is firmly connected to the machine.
Fixing assembly
6) Using the door switch actuator and with the front cover open, gen-
erate a test print (PG-TYPE6, solid black).
Turn off the switch immediately before the copy paper enters the
fixing assembly, and check the image. Is the image normal?
YES: The cause is after the fixing system. Perform the following:
1. Roller offset in the fixing assembly
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