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User GuidePro C7500/C7500H

Medaka (White Spots)

White dots or short lines appear, spaced at intervals of 189 mm (7.5 inches) in the direction of the paper feed.

illustration of Medaka

Cause:

The photoconductor unit is stained.

Solution:

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

Note

  • 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 photoconductor unit surface with a clean dry cloth to remove the stain.

In the [Machine: Maintenance] group on the [Operator Adjust.] menu, execute 0504: [Execute Cleaning Initial Setting for PCU]. Go to the next step.

No

Replace the photoconductor unit.

14 Photoconductor Unit (Black)/28 Photoconductor Unit (Cyan)/42 Photoconductor Unit (Magenta)/56 Photoconductor Unit (Yellow)/70 Photoconductor Unit (Special)

3Print the image. Has the problem been resolved?

Yes

Finished!

No

Replace the PCU cleaning unit.

4 PCU Cleaning Unit (Black)/18 PCU Cleaning Unit (Cyan)/32 PCU Cleaning Unit (Magenta)/46 PCU Cleaning Unit (Yellow)/60 PCU Cleaning Unit (Special)