Scann glasses have been cleaned but that was no help is there a way to fix this problem from computer?
Canon 6080-7580 & 9080 are notorious for developing lines on scanned images on either front or rear pages. Verify that the shading units are extending properly & have no black debris by opening the transport fully then depressing the green button on the control panel until the shading plates extend (with power on). Lines are also often due to very light scratches on the reading units glass but can also be caused by dust contaminating the reading unit. For this reason it is strongly recommended to NOT use compressed air around the reading units as it tends to blow dust particles into the reading units. Per Canon, the reading units are not field serviceable but can be disassembled if due care is used when removing the CCD assembly from the back of the unit. Cleaning the CCD array with a soft cloth lightly moistened with alcohol will often be enough to fix lines. If the glass has severe scratches, buffing them out with jewelers rouge may work. There are a few entities that will refurbish these reading units as well.
SOURCE: Canon DR-2050C Scanner gets verticle line down image
I have the same issue with mine and there are 2 image sensors on this scanner. 1 in the back that you will see when you open the front that has a meteal shield covering the top half, and one in the fold out front that faces the inside. These are the "glass" sections everyone is refering to. Problem is, they are plexiglass, not glass and mine has a tiny scratch in the lens that is causing the line. This could be your problem. find the lens and use a LED flashlight to inspect your lens for scratches. If its scratched like mine, the entire module has to be replaced to fix it. The canon part number is MH7-7038 and they range from $125-$160 if you replace it yourself. The one in the front is easy to do, but the back one is a little tricky. Hope this helps. E. Alexander, Field Tech, Cummins-Allison
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