The Copy Has Uneven Density (Horizontal) - Canon CLC5000 Service Manual

3.4.4 The copy has uneven density (horizontal).

1) Clean the primary charging assembly, dust-proofing glass, reflect-
YES: End.
2) Is the output image of the halftone print (PGYTPE=5) normal?
YES: Go to step 11.
Moire
3) Is the image uneven because of moire*?
YES: Decrease 'Photo Sharpness', and store the setting in standard
Service mode (CCD)
4) Are the settings of 'CCD' as indicated on the service label?
NO:
5) Execute 'FUNC > CCD > AUTO-ADJ' in service mode. Is the prob-
NO:
Transfer/static eliminating system
6) • Is the transfer blade locking mechanism of the transfer unit nor-
YES: Check the transfer blade locking mechanism; if normal, replace the
Fixing unit
7) Are there scratches or dents in the peripheral direction of the fixing
YES: Replace the fixing roller.
8) Is there a fault on the fixing oil applying roller, oil hose, oil tank, oil
YES: Remove the cause of the fault, and replace the part.
COPYRIGHT © 2001 CANON INC.
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
ing mirror, and lens. Is the problem corrected?
* Pattern interference that occurs when copying originals printed
in dots.
mode.
• If excessively decreased, copies of photos will have little contrast.
Enter the correct settings.
lem corrected?
Replace the image processor or the analog processor.
mal?
• Are there scratches or a fault on the transfer blade?
• Operate the transfer blade using 'BLADE' under 'FUNC' in ser-
vice mode to check the locking of the transfer blade. At this time, is
the transfer blade subject to warping or other fault?
transfer blade.
roller (upper, lower)?
pump driver solenoid or oil removing blade?
2000 2000 2000 2000 CANON CLC5000 REV.0 JAN 2001
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