Question about Xerox DOCUMATE 510 Flatbed Scanner
There are two possibilities: 1) The scanner sensor has a dead pixel, or 2) There is a particle covering a pixel of the linear scanning sensor array.
If you are up to it, open the scanner carefully and clean all the optics while you are at it. So the back of the glass cover, the mirrors (carefully!) and then the sensor. You may want to use a duster spray can (I think Office Max or Depot carry those) and dust of the sensor and the mirrors instead of using a soft cloth. If the scanner uses first surface mirrors, then one can very easily ruin the mirror coatings and it will be full of scratches from the dust particles when you wipe them! If they use regular mirrors (where the reflective coating is behind the glass) then it is safe to use a cloth.
If that does not get rid of the black line, then you have a dead pixel in your scanner sensor and you need to buy a new one.
There may be a way to tell whether it is a dead pixel or a dirt particle on the sensor. If you open your scanned image (or plain white paper image), magnify the image and see if the line is exactly one pixel wide - that would point to a dead pixel. If it is more than one pixel wide and the scanner did not do an interpolation then it is a dirty sensor. To make sure, scan with the maximum intrinsic resolution (chek the scanner's manual for that), so you don't interpolate between pixels. I am still not sure if that also applies to color scanners, they have a color filter over the linear detector array. It may depend on how the pixels for the color coding are arranged. But then I would expect an 'off-color' line, not a black line. If it is a black line and if it is more than one pixel wide, I am sure that a dust particle is the reason for it.
Good luck, Stephan
Posted on Apr 29, 2011
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Posted on Jan 02, 2017
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