Epson GT-12000 User Manual page 83

Straight lines in the image are jagged.
The document may be placed at an angle on the document
table. Align it so that the horizontal and vertical lines are
carefully aligned with the scales on the top and side of the
document table.
The image does not look the same as the original.
Try different combinations of image settings using your
scanner software.
Your software may not have sufficient color matching and
color management features, or these components of your
software may not be correctly installed. (See your software and
computer manuals.)
If you are importing a scanned-image file into your application
software, make sure the file format is one your software can
read. Also check that the image settings in your application are
appropriate for the type of image you want to scan. (See your
software manual.)
A line of dots is always missing in the scanned image.
If this happens in your printed image only, your printer or its
print head is probably malfunctioning. (See your printer
manual.)
If this happens on both your screen and printout, the scanner's
sensor may be malfunctioning. Consult your dealer.
When halftoning is used, textured patterns of dots appear on
particular areas of an image.
This is normal. See the explanation of moiré in the Color Guide.
Troubleshooting and Maintenance
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