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What could be causing a vertical line down a scanned image, when there is no line on the original document?

April 26, 2017causing DOCUMENT image line original scanned vertical

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What could be causing a vertical line down a scanned image, when there is no line on the original document?

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Having paper dust collect on or near the CCD or CIS can cause a line to appear on the digitized image. To remove this line, you will need to clean the rollers and the lens. Also, using compressed air will blow away any loose particulars such as paper shavings or paper dust.