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User GuidePro C7500/C7500H

Blister-like White Spots

White spots 0.3–0.5 mm (0.01–0.02 inches) in diameter surrounded by denser spots (blister-like white spots) appear.

illustration of Blister-like White Spots

Occurrence conditions:

  • When printing solid-fill images on coated paper

  • When printing solid-fill images on both sides of the paper

  • When printing in a low temperature environment

Solution:

1On the printer driver dialog box of Fiery Command WorkStation, set the fusibility throughput setting to Fuser Setting HQ mode.

Note

  • When using paper with a thickness of Paper Weight 6 to 9, throughput may be reduced.

Print 10 or more A3 sheets. Has the problem been resolved?

Yes

Finished!

No

Go to the next step.

2If the paper is not registered as custom paper, register the brand of the paper.

3If there is room to reduce the print speed (from "High" or from "Middle"), and if the reduced throughput does not cause a problem, go to the next step.

Otherwise, perform the procedure from Step 5 in "(b) Changing the fusing temperature (If [Print Speed] is set to [Low])".

4In [Detailed settings] for the custom paper you are using, select 1231: [Print Speed], and then decrease the value in the following corresponding settings by one level.

Productivity Priority

  • 1231-01: Print Speed: BW/FC/FCS: BW/FC/FCS

  • 1231-02: Print Speed: FCS: Clear/Special

  • 1231-03: Print Speed: FCS: White

  • 1231-04: Print Speed: FCS: Metallic

  • 1231-06: Print Speed: S: Clear/Special

  • 1231-07: Print Speed: S: White

  • 1231-08: Print Speed: S: Metallic

High Quality

  • 1231-10: Print Speed: BW/FC/FCS: Fuser Setting HQ: BW/FC/FCS

  • 1231-11: Print Speed: FCS: Fuser Setting HQ: Clear/Special

  • 1231-12: Print Speed: FCS: Fuser Setting HQ: White

  • 1231-13: Print Speed: FCS: Fuser Setting HQ: Metallic

  • 1231-15: Print Speed: S: Fuser Setting HQ: Clear/Special

  • 1231-16: Print Speed: S: Fuser Setting HQ: White

  • 1231-17: Print Speed: S: Fuser Setting HQ: Metallic

For example, if the print speed is [High], lower it to [Middle], and if it is [Middle], lower it to [Low].

When decreasing the print speed to [Middle]

Go to "(a) If [Print Speed] is set to [Middle]".

When decreasing the print speed to [Low]

Go to "(b) If [Print Speed] is set to [Low Speed]".

(a) Changing the fusing temperature (If [Print Speed] is set to [Middle])

1Select 1232: [Fusing Temperature], and then decrease the value in the following corresponding settings by 5°C.

Productivity Priority

  • 1232-01: Fusing Temperature: BW/FC/FCS: Heat Roller Temp

  • 1232-06: Fusing Temperature: FCS: Heat Roller Temp: Clear/Special

  • 1232-07: Fusing Temperature: FCS: Heat Roller Temp: White

  • 1232-08: Fusing Temperature: FCS: Heat Roller Temp: Metallic

  • 1232-26: Fusing Temperature: S: Heat Roller Temp: Clear/Special

  • 1232-27: Fusing Temperature: S: Heat Roller Temp: White

  • 1232-28: Fusing Temperature: S: Heat Roller Temp: Metallic

High Quality

  • 1232-46: Fusing Temperature: BW/FC/FCS: Fuser Setting HQ: Heat Roller Temp

  • 1232-51: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: Clear/Special

  • 1232-52: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: White

  • 1232-53: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: Metallic

  • 1232-71: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: Clear/Special

  • 1232-72: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: White

  • 1232-73: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: Metallic

2Print 10 or more A3 sheets. Has the problem been resolved?

Yes

Go to the next step.

No

Start over from Step 1.

3Is the toner fusibility within the permissible range?

Note

  • The required level of fusibility is as follows.

    • The printed image does not come off.

    • The toner does not come off even if it is lightly rubbed by a nail.

    • The toner does not come off even if it is rubbed by the cloth for cleaning the contact glass.

Yes

Finished!

No

Change the print speed to "Low". Go to "(b) Changing the fusing temperature (If [Print Speed] is set to [Low])".

(b) Changing the fusing temperature (If [Print Speed] is set to [Low])

1Select 1232: [Fusing Temperature], and then decrease the value in the following corresponding settings by 20°C.

2Change the temperature adjustment for the initial paper feeding to "0°C".

Productivity Priority

  • 1232-02: Fusing Temperature: BW/FC/FCS: Correct Temp: Initial Feed

  • 1232-10: Fusing Temperature: FCS: Correct Temp: Initial Feed: Clear/Special

  • 1232-11: Fusing Temperature: FCS: Correct Temp: Initial Feed: White

  • 1232-12: Fusing Temperature: FCS: Correct Temp: Initial Feed: Metallic

  • 1232-30: Fusing Temperature: S: Correct Temp: Initial Feed: Clear/Special

  • 1232-31: Fusing Temperature: S: Correct Temp: Initial Feed: White

  • 1232-32: Fusing Temperature: S: Correct Temp: Initial Feed: Metallic

High Quality

  • 1232-47: Fusing Temperature: BW/FC/FCS: Fuser Setting HQ: Correct Temp: Initial Feed

  • 1232-55: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Initial Feed: Clear/Special

  • 1232-56: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Initial Feed: White

  • 1232-57: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Initial Feed: Metallic

  • 1232-75: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Initial Feed: Clear/Special

  • 1232-76: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Initial Feed: White

  • 1232-77: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Initial Feed: Metallic

3Select [Correct Temp: Initial Feed], and then set the value in the following corresponding settings to 5°C.

Productivity Priority

  • 1232-03: Fusing Temperature: BW/FC/FCS: Correct Temp: Pre-Feed

  • 1232-14: Fusing Temperature: FCS: Correct Temp: Pre-Feed: Clear/Special

  • 1232-15: Fusing Temperature: FCS: Correct Temp: Pre-Feed: White

  • 1232-16: Fusing Temperature: FCS: Correct Temp: Pre-Feed: Metallic

  • 1232-34: Fusing Temperature: S: Correct Temp: Pre-Feed: Clear/Special

  • 1232-35: Fusing Temperature: S: Correct Temp: Pre-Feed: White

  • 1232-36: Fusing Temperature: S: Correct Temp: Pre-Feed: Metallic

High Quality

  • 1232-48: Fusing Temperature: BW/FC/FCS: Fuser Setting HQ: Correct Temp: Pre-Feed

  • 1232-59: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Pre-Feed: Clear/Special

  • 1232-60: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Pre-Feed: White

  • 1232-61: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Pre-Feed: Metallic

  • 1232-79: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Pre-Feed: Clear/Special

  • 1232-80: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Pre-Feed: White

  • 1232-81: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Pre-Feed: Metallic

4Print 10 or more A3 sheets. Has the problem been resolved?

Yes

Proceed to Step 7.

No

Go to the next step.

5Go back to 1232: [Fusing Temperature] and decrease the fusing heat roller's temperature by 5°C.

6Print 10 or more A3 sheets. Has the problem been resolved?

Yes

Proceed to Step 7.

No

Start over from Step 5.

7Check to see if the fusibility is within the acceptable range.

Note

  • The required level of fusibility is as follows.

    • The printed image does not come off.

    • The toner does not come off even if it is lightly rubbed by a nail.

    • The toner does not come off even if it is rubbed by the cloth for cleaning the contact glass.

Yes

Finished!

No

No further improvement is likely.

Note

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

  • After performing the solution, it is recommended to perform the color calibration of the external printer controller.