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User GuidePro C7500/C7500H

Toner Stains of Mixed Colors (Horizontal Streaks)

Multi-color toner stains occur in the form of horizontal streaks.

Illustration of Multiple Toner Stains: Horizontal Streaks

Cause:

If printing starts after the machine is left in a low temperature environment for a while, the toner accumulated on the cleaning blade of the intermediate transfer belt cleaning unit is not sufficiently removed, resulting in mixed-color toner stains.

Solution:

1Increase the ambient temperature of the machine’s environment.

Increase the temperature to approximately 20°C (68°F) or higher.

2Leave the machine in that condition for 30 minutes or more before printing.

3Print the image. Has the problem been resolved?

Yes

Finished!

No

Go to the next step.

4Set the machine's anti-condensation heater (option) switch to "ON".

5Print the image. Has the problem been resolved?

Yes

Finished!

No

Go to the next step.

6Set Energy Saver mode and other energy-saving modes to "Off".

7Print the image. Has the problem been resolved?

Yes

Finished!

No

Go to the next step.

8Replace ITB Cleaning Unit.

98 ITB Cleaning Unit

9Print the image. Has the problem been resolved?

Yes

Finished!

No

No further improvement is likely. Contact your service representative.