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User GuidePro C7500/C7500H

Improving Fusibility

This section explains how to resolve the problem of insufficient toner fusing on printed copies.

Note

  • To adjust the following settings, pre-register the type of paper in use as a custom paper. For details about registering custom papers, see "Changing Tray Paper Settings".

Solution:

Carry out the following sequence of procedures. Terminate the sequence as soon as the problem is resolved.

Procedure 1: Changing the fusing temperature

1In [Detailed settings] for the custom paper you are using, select 1232: [Fusing Temperature], and then adjust the value in the following corresponding settings by 5°C.

  • 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

  • 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 the image and check toner fusion. Has the problem been resolved?

Yes

Finished!

No

Increase the temperature an additional 5°C.

3Repeat Step 2.

If the problem persists even if you increase the temperature to 185°C, perform Procedure 2, "Changing the print speed".

Procedure 2: Changing the print speed

This will slow down the printing to give the toner more time to fuse. However, because of this, throughput will be reduced.

1In [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 step.
If the present value is [High], select [Middle]. If it is [Middle], select [Low].

2Is 1231: [Print Speed] set to [Low]?

Yes

Go to the next step.

No

Proceed to Step 4.

3In [Detailed settings] for the custom paper you are using, select 1232: [Fusing Temperature], and then set the value in the following corresponding settings by 10.

4Print the image and check toner fusion. Has the problem been resolved?

Yes

Finished!

No

Go to the next step.

5Is 1231: [Print Speed] set to [Middle]?

6In [Detailed settings] for the custom paper you are using, select 1232: [Fusing Temperature], and then set the value in the following corresponding settings by 10.

7Print the image and check toner fusion. Has the problem been resolved?

Yes

Finished!

No

Increase the temperature further by 5°C.

If the problem persists even after increasing the value to "200", contact your service representative.

Note

  • If you change the value of 1231: [Print Speed] from [Low] to [High] or to [Middle], in 1232: [Fusing Temperature], reset the value of [Correct Temp: Pre-Feed] to its default value.

  • Changing the fusing temperature or changing the process speed may produce one or more of the following side effects:

    • Paper curling

    • Paper misfeeding

    • Blisters

    • Glossy lines

    • Change of gloss

  • If one or more of the above side effects occurs, adjust the fusing temperature and process speed by decreasing the fusing temperature and increasing the process speed.

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

  • Check the toner fusibility 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.

  • To print on both sides with the special color, change the [FCS] setting.