Scanning Problems; Image Is Dark, With Little Or No Detail; Scanned Image; Moiré (Cross-Hatch) Patterns Appear In The Scanned Image - Epson Perfection 640U Reference Manual
Color image scanner
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Also See for Perfection 640U:
- Scanner basics (71 pages) ,
- Service manual (53 pages) ,
- Product support bulletin (31 pages)
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Scanning Problems
Image is dark, with little or no detail.
Calibrate the screen as described in "Calibrating Your Screen" on
page 4-2.
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.
See "Image Controls" on page 3-9.
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.
❏ 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.
Colors differ from the original.
❏ Calibrate the screen. See "Calibrating Your Screen" on page
4-2.
Maintenance and Troubleshooting
5-17
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