Epson Perfection 636U User Manual page 46

If your scanned image is faint or
has gaps . . .
Check the brightness. Decrease
the software or driver's brightness
setting.
Try adjusting the Gamma setting.
Check the condition of your
original. If the document is
damaged, dirty, or wrinkled, these
imperfections will show up in your
scan.
If your scanned image is blurred
or distorted . . .
Check the position and condition
of your document. Make sure the
document is placed flat against the
scanner's document table glass. If
only part of the image is blurred,
part of your document may be
wrinkled or warped.
Make sure the document table
glass is clean.
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