Scanning Results Are Not As Expected - Canon imageFORMULA DR-4010C Reference Manual

✘ Scanning Results Are Not as Expected

If there is a problem with the scanning result (e.g., the scanned image is
not clear, or the image is striped or dirty,) the probable causes are
incorrect ISIS/ TWAIN driver settings or a problem with the scanning
unit inside the scanner. Scanning results can also become skewed if
the ISIS/TWAIN driver has not been installed correctly, or the
application in use does not support ISIS/ TWAIN driver functions.
Symptoms The scanned image is too dark (or faint.)
Problem The [Brightness] setting is not set to an appropriate
value.
Solution If the image is dark, set a higher [Brightness] setting, or if
the image is faint, set a lower [Brightness] setting.
Symptoms Text or images on the rear side of your document
appear in the scanned image.
Problem The [Brightness] setting is too low, or the paper is too
thin.
Solution Set a higher [Brightness] setting. If the paper is too thin,
make a copy of the documents and then scan the copy.
Alternatively, enable the [Prevent bleed through/remove
background] setting.
Symptoms Double-sided scanning is not possible.
Problem "Scanning Side" is set to [Simplex].
Solution Set "Scanning Side" to [Duplex].
Symptoms A black margin appears around the scanned
document.
Problem A document smaller than the preset paper size has been
scanned. Or, the loaded document has shifted out of
position.
Solution Set [Page size] to [Auto-detection]. Or, set [Border
Removal] to on.
Symptoms The scanned image is skewed.
Problem The document has been fed at an angle. (skew)
Solution Use the document guide adapter to prevent document
skew, and set [Deskew] to on.
48 Troubleshooting