10.Image Quality Problem: Spots
590
Cause
Dirty drum (photoconductor unit)
Solution
1. Select “26: Full Dot Pattern” in SP2-109-003 (Test Pattern - Pattern Selection), and then print three
pages in A3 paper for each color (cyan, magenta, black and green*).
*: It is difficult to see white spots on the yellow image. Therefore, green is used instead of
yellow.
2. Check the outputs and identify a problem color.
3. Remove the drum (photoconductor unit) for the problem color, and then check the drum surface.
4. Is the surface dirty?
YES: Use a dry cloth to wipe away dirt from the drum surface, and then execute “0504 [Execute
Cleaning Initial Setting for PCU]” in “Adjustment Settings for Operators”. Then go to next step.
NO: Replace the drum (photoconductor unit), then go to next step.
5. Print the target image. Is the problem solved?
YES: Finish
NO: Replace the drum (photoconductor unit) if it is not replaced or PCU cleaning unit.
Patchy Image at the Leading Edge
Unprinted areas like worm holes appear in the leading edge of the image.
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