20
3.1.6 Black Streaks
Short black streaks appear on a black halftone image.
300 mm (12 in.)
60 mm
(2.4 in.)
60 mm
(2.4 in.)
CNT004
Cause:
A sheet is bent at the entrance to the fusing unit and comes into contact with the
edge of the paper delivery tank, where static electricity builds up on the sheet
through friction. This causes scattering of unfixed toner on the paper surface.
This may occur if:
• Printing is done at low temperature or humidity
• The thickness of the paper is equivalent to Paper Weight 2 or lower
• A black halftone image is printed
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 "Registering a Custom
Paper", Paper Settings Reference.
Solution:
1.
In [Advanced Settings] for the custom paper in use, select [22: Fusing Feed
Speed Adjustment].
2.
Check the present value. Is it higher than +1.5%?
Yes
No further improvement is likely. Contact your service representative.
No
Increase the value by 0.5 percentage points.
3.
Print the image. Is the problem resolved?
Yes
Finished!
No
Repeat Steps 1 to 3. If the problem persists even though you have
increased the value to +1.5%, contact your service representative.
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