Maintenance and Troubleshooting
6-25
❏
Change the Destination setting. Select
Screen/Web
as the
“Destination” on page 3-14. Selecting a printer may cause on-
screen colors to be different from the colors of the original,
however colors will be reproduced correctly when it is
printed.
You cannot scan an image or you only get a few
dots for the scanned image.
❏
Make sure a document is placed on the document table of the
scanner.
❏
Change the Threshold setting in the Image Control dialog box.
When
Text (Background Removal)
is selected as the Image
Type, change
Text Enhancement Technology
to
None
from the B/W Option in the Image Type dialog box. Then
change the
Threshold
setting in the Image Controls dialog
box. Or change
Text (Background Removal)
to
Text/Line
Art
, then change the
Threshold
setting in the Image Control
dialog box. See “Image Controls” on page 3-20.
Moiré (cross-hatch) patterns appear in the
scanned image
❏
Make sure Image Type is set to
Color Document
or
Black &
White Document
in the Manual mode window.
❏
Change the Image Type settings. Turn the De-screening
setting
On
in the Image Type dialog box.
❏
Place a transparent sheet such as an overhead projector sheet,
between the document and the document table.
❏
Reposition the document slightly.
❏
Make the image size slightly smaller.
Summary of Contents for 1640SU - Perfection Photo Scanner
Page 2: ... 2 ...
Page 44: ...2 20 Scanning Basics High Contrast Increases the contrast of dull images Open Shadow ...
Page 54: ...2 30 Scanning Basics ...
Page 98: ...4 10 Calibrating Your System ...
Page 114: ...5 16 Options Paper support Spare paper path guide ADF Document Mat ...
Page 130: ...5 32 Options ...
Page 172: ...6 42 Maintenance and Troubleshooting ...
Page 185: ...Contacting Customer Support B 1 Appendix B Contacting Customer Support Overview B 2 ...
Page 192: ... 6 Glossary ...