Epson Expression 1680 Special Edition User Manual (w/EPSON TWAIN software) - Page 133

can only scan a few dots., t scan, or

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You can't print scanned images, or the printed image looks garbled. s Make sure your printer is securely connected to your computer and that you're using the correct cable. s Make sure the correct printer is selected in your printer software. OCR scanning produces poor character recognition. s Select OCR as both the Image Type and Destination. s Select Text Enhancement Technology for the Black and White Option in the Image Type window. s Adjust the Threshold setting in the Image Controls window. The image doesn't scan, or you can only scan a few dots. s Make sure the document is face down on the document table. s If you're using an automatic document feeder, make sure the original document is inserted face up. s If you've selected OCR as your Image Type, select None for the Black and White Option 126 Solving Problems in the Image Type window. Then adjust the Threshold setting in the Image Controls window. Or try changing the Image Type from OCR to Line Art, then adjust the Threshold setting. You're using a transparency unit, and the colors of your negative film preview look strange. s Make sure you've selected TPU for Neg. Film as your Document Source. s The scanner perceives the film guide's frame as white, which alters the exposure of the scanning area and makes the preview appear darker. To see the correct colors, do a zoom preview on an area toward the center of an image. s If you see light vertical lines on the scanned image, the TPU calibration area may contain dirt or dust. Clean the calibration area with a lint free cloth.

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126
Solving Problems
You can
’
t print scanned images,
or the printed image looks
garbled.
■
Make sure your printer is
securely connected to your
computer and that you
’
re using
the correct cable.
■
Make sure the correct printer is
selected in your printer
software.
OCR scanning produces poor
character recognition.
■
Select
OCR
as both the
Image
Type
and
Destination
.
■
Select
Text Enhancement
Technology
for the
Black and
White Option
in the Image
Type window.
■
Adjust the
Threshold
setting in
the Image Controls window.
The image doesn
’
t scan, or you
can only scan a few dots.
■
Make sure the document is face
down on the document table.
■
If you
’
re using an automatic
document feeder, make sure the
original document is inserted
face up.
■
If you
’
ve selected
OCR
as your
Image Type
, select
None
for
the
Black and White Option
in the Image Type window.
Then adjust the
Threshold
setting in the Image Controls
window.
Or try changing the
Image
Type
from
OCR
to
Line Art
,
then adjust the
Threshold
setting.
You
’
re using a transparency unit,
and the colors of your negative
film preview look strange.
■
Make sure you
’
ve selected
TPU
for Neg. Film
as your
Document Source
.
■
The scanner perceives the film
guide
’
s frame as white, which
alters the exposure of the
scanning area and makes the
preview appear darker. To see
the correct colors, do a zoom
preview on an area toward the
center of an image.
■
If you see light vertical lines on
the scanned image, the TPU
calibration area may contain
dirt or dust. Clean the
calibration area with a lint free
cloth.