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<span>Never apply solution directly on the scanner glass. If you find that the glass is dirty or has a slight dust or smoke film underneath and on the inside, do not unscrew the lid and try to clean it from inside. It's always advisable to call an authorized service center. </span><br />
<span>Never use abrasives, isopropyl alcohol, benzene, acetone etc on the scanner glass, as this will streak and cloud the glass, and can Even cause damage. </span><br />
<span>Never place your scanner near heating vents or windows, or other locations where moisture might affect its functioning. Also remember: If you are moving the scanner from one place to another, make sure that the transportation lock is enabled, as this prevents the CCD array mechanism from moving. Push down the lock, which is located at the back of the scanner. Remember to unlock the scanner before you attempt to operate it, or you may end up damaging it. </span>
happened to me after i fed a page with not-too-hard whiteout on it. the feeder makes the page run through a different piece of glass and i just had to clean it.
this could be down to several thisngs lift the lid on the top and look at the glass area does the underside look clean or dirty? have a look at the scanner area to see if there is dust ont the mirrors you should see this when you do a test copy press the print button and look at the light unit and the mirrors as they move across the glass if you can see dust or dirt on the mirrors they may require cleaning.. if so turn the machine off take out the screws holding the glass in place lift the glass out carefully.. sometimes they stick down if they havent been cleaned lately so pull up.. take a clean dust cloth slide the scanner unit out for access and clean of the mirrors.. p[ut back together and test if no better open the fornt door and look at the units inside to see if you can take them out..give these a check to see if there are marks on the surfaces of the units.. if the copies are dark usually on a old copier its down to the dust..
Small white dots would indicate progressive failure of the CCD[sensor] or perhaps ingress of dirt to the inside of the glass. hard to say exactly with out seeing the machine.
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