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Solution:

1To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of cyan, magenta, black, and green.

Because it is difficult to identify white spots on yellow, green is used instead of yellow.

2Detach the photoconductor unit of the affected color and check the drum surface. Is the surface stained?

Yes

Wipe the drum surface with a clean dry cloth to remove the stain and set [Photoconductor Special Mode] to [Special Mode] in the [Machine: Image Quality] group on the [Adjustment Settings for Skilled Operators] menu.

No

Replace the drum.

3Print the image. Is the problem resolved?

Yes

Finished!

No

Replace the cleaning unit for PCU and drum.

4If the problem persists, contact your service representative.

Note

  • For details about replacing the cleaning unit for PCU and drum, see Replacement Guide.