Troubleshooting
125
GT-20000
User’s Guide
An Image on the Back of Your Original Appears in Your Scanned
Image
If your original is printed on thin paper, images on the back may be visible to the scanner
and appear in your scanned image. Try scanning the original with a piece of black paper
placed on the back of it. Also make sure the
Document Type
and
Image Type
settings are
correct for your original. See “Scanning in Office Mode” on page 23, “Scanning in Home
Mode” on page 25, or “Scanning in Professional Mode” on page 27 for instructions.
Ripple Patterns Appear in Your Scanned Image
A ripple or cross-hatch pattern (called moiré) may appear in a scanned image of a printed
document. It is caused by interference from the differing pitches in the scanner’s screen
and the halftone screen in your original.
❏
Select the
Descreening
check box. In Professional Mode, select an appropriate
Screen Ruling
for the Descreening and deselect the
Unsharp Mask
setting. See
“Adjusting the Color and Other Image Settings” on page 39 for instructions.
❏
Select a lower resolution setting. See “Selecting the Scan Resolution” on page 32 for
instructions.
Note:
You cannot remove ripple patterns when you are scanning using a resolution higher than 600 dpi.
Characters Are Not Recognized Well
❏
Make sure the document lies perfectly straight on the document table.
❏
In Office Mode or Home Mode, select the
Text Enhancement
check box.
Original image
Descreening applied
