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Vertical Streaks on Copies due to Scanning Problems
Troubleshooting
Troubleshooting
Troubleshooting
6.18 VERTICAL STREAKS ON COPIES DUE TO SCANNING PROBLEMS
6.18.1 OVERVIEW
Marks on prints and copies are mostly due to dirt on the DF exposure glass [A], generally caused by adhesive contaminants (such as ball point pen ink and correction fluid).
Compared to non-adhesive contaminants (such as paper fragments and eraser dust), adhesive contaminants are more likely to lead to complaints from customers because of the following:
Vertical streaks caused by adhesive contaminants are more visible in terms of image quality.
Unless removed by cleaning, adhesive contaminants continue to produce vertical streaks, while non-adhesive contaminants stop producing streaks after they are dislodged.
Many adhesive contaminants are difficult to remove by cleaning.
The ARDF DF3090 / SPDF DF3100 features a system (non-contact scanning) to reduce vertical streaks caused by adhesive contaminants.
Contact scanning: Other ADFs/ARDFs | Non-contact scanning: DF3090 / DF3100 |
In contact scanning, the whole of the original comes into contact with the DF exposure glass [A] so that non-adhesive contaminants can be removed.
| By means of the Mylar sheet [B], originals are kept slightly above the DF exposure glass [A], preventing adhesive contaminants from adhering to the glass. |
The ARDF DF3090 / SPDF DF3100 can be converted from non-contact scanning to contact
