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15.8 Troubleshooting
Symptom
Scanned image is skewed.
The image of a scanned
document is blank.
Vertical streaks appear on the
scanned document.
The scanning density is uneven.
The color of the scanned
document is extremely different
from the original document.
Dark spots or noise appear on
the scanned documents.
There is noise or wave patterns
(moire pattern) on the scanned
image.
132
Possible Cause
The document guides are not
adjusted to the size of the
document to be scanned, or the
document to be scanned is set
slanted on the feed tray.
Right and left sides of the
document to be scanned are not
the same in height because of
curling or folding.
The document to be scanned
was loaded upside down.
The scanning glasses are dirty.
The scanning glasses are dirty.
The settings of the computer
monitor do not accurately reflect
the color of the document.
Depending on the documents
scanned, the color of documents
may not be scanned properly.
For example, the color of a
highlighter pen may be scanned
lighter than it appears.
The scanning glasses are dirty.
The scanning resolution settings,
combined with patterns within the
scanned image, may cause this
problem.
Remedy
Adjust the document guides
properly to the size of the
document to be scanned (page
47).
Flatten the document (page 42)
and load it again after reducing
the number of sheets.
Load the documents with the
surface to be scanned facing
down.
Clean the conveyor and
scanning glasses (page 104).
The problem may also be
resolved by using "Vertical Line
Reduction" in User Utility. For
details, refer to the User Utility
help.
Clean the conveyor and
scanning glasses (page 104).
The problem may also be
resolved by using "Vertical Line
Reduction" in User Utility. For
details, refer to the User Utility
help.
Adjust the computer monitor
settings.
Setting the value for [Chroma]
higher in the scanning conditions
may solve this problem.
Clean the conveyor and
scanning glasses (page 104).
Change the scanning resolution
or turn the Moire Reduction
function on, and perform
scanning again. About Moire
Reduction function, refer to the
Image Capture Plus, TWAIN, or
ISIS help.
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