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User GuidePro C7500/C7500H

White Toner Stains on the Background on Black Paper (Banding-Shape)

Cause:

In a high temperature and high humidity environment, the electrical charge for the white toner drops. If printing starts in such a condition and a large amount of white toner is replenished, white toner stains occur on the background.

Solution:

1If the paper is not registered as custom paper, register the brand of the paper.

2In the [Machine: Image Quality] group on the [Operator Adjust.] menu, select 0201: [Execute Image Quality Adjustment] and execute 04: [Adjust Image Density (Including special color)].

3Print the image. Has the problem been resolved?

Note

  • Performing this once may not be sufficient to achieve the desired effect. If you perform image density adjustment and check its result 3 times and the problem still persists, go to the next step (image process adjustment).

Yes

Finished!

No

Go to the next step.

4In the [Machine: Maintenance] group on the [Operator Adjust.] menu, execute 0501-01: [Execute Process Adjustment].

5Print the image. Has the problem been resolved?

Yes

Finished!

No

No further improvement.

If you perform image process adjustment and check its result 3 times and the problem still persists, contact your service representative.

Note

  • If you perform image process adjustment and check its result 3 times and the problem still persists, contact your service representative.