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User GuidePro C7500/C7500H

Horizontal Streaks of Uneven Density (Low-Resistance Paper)

When printing is performed on low-resistance paper such as metallic paper or black paper, horizontal streaks of uneven density appear in the area approximately 85 mm (3.3 inches) from the trailing edge of the paper.

Illustration of Horizontal Streaky Density Fluctuation: Trailing Edge of Paper (85 mm)

Cause:

The paper transfer current tends to be transferred from the paper surface to the transfer timing roller and results in fluctuations in the paper transfer bias, causing streaks and uneven density.

Solutions:

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

2In [Detailed settings] for the custom paper you are using, select 1214: [Paper Transfer Output], and then adjust the values in the following settings in steps of ±1 according to the mode in use.

  • 1214-01: Paper Transfer Output: BW: Side 1

  • 1214-02: Paper Transfer Output: BW: Side 2

  • 1214-05: Paper Transfer Output: FC/FCS: Side 1

  • 1214-06: Paper Transfer Output: FC/FCS: Side 2

  • 1214-09: Paper Transfer Output: FCS: Side 1

  • 1214-10: Paper Transfer Output: FCS: Side 2

  • 1214-13: Paper Transfer Output: S: Side 1: Clear/Special

  • 1214-14: Paper Transfer Output: S: Side 1: White

  • 1214-15: Paper Transfer Output: S: Side 1: Metallic

  • 1214-17: Paper Transfer Output: S: Side 2: Clear/Special

  • 1214-18: Paper Transfer Output: S: Side 2: White

  • 1214-19: Paper Transfer Output: S: Side 2: Metallic

3Print the image. Has the problem been resolved?

Yes

Finished!

No

Go to the next step.

4In 1214: [Paper Transfer Output], further adjust the values in the applicable settings in steps of ±1.

5Print the image and check if there are any problems such as faintness or white spots.

Yes

No further improvement is likely.

No

Finished!

Note

  • Select "Clear/Special" when using Neon Yellow, Neon Pink, or Invisible Red. Select "Metallic" when using Gold or Silver.