57
TROUBLESHOOTING
6
Poor scanning quality.
Is the underside of the document cover/SPF/RSPF dirty?
→ Clean regularly.
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Original smudged or blotchy?
→ Use a clean original.
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Have you specified a suitable resolution?
→ Make sure that the resolution setting in the scanner driver is
appropriate for the original.
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Are you scanning a large area (for example an entire 11" x
14") at high resolution?
→ If you attempt to scan a large area at high resolution and there is
insufficient memory in the machine to hold the scanned data,
scanning will take place at a lower resolution and the scanner
driver will enhance the data to make up for the lower resolution.
However, the quality of the enhanced image will not be as high as
if scanning took place at the higher resolution. Use a lower
resolution setting, or scan a smaller area.
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Have you specified a suitable value for the "B/W
Threshold" setting?
→ If you are scanning with a TWAIN-compliant application and are
using "Mono 2 gradation (no Green)","Mono 2 gradation (no
Red)" or "Mono 2 gradation (no Blue)" mode, make sure that a
suitable value is specified for the "B/W Threshold" setting. A
larger threshold value makes your output darker, while a small
threshold value makes it lighter. To adjust the threshold
automatically, click the "Auto Threshold" button on the "Image"
tab of the "Custom Settings" screen.
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Are the brightness and contrast settings suitable?
→ If you are scanning with a TWAIN-compliant application and the
resulting image has unsuitable brightness or contrast (for
example it is too bright), activate the "Auto Brightness/Contrast
Adjustment" setting on the "Main" tab of the "Custom Settings"
screen. Click the "Brightness/Contrast" button to adjust the
brightness and the contrast while viewing the scanned output
image on the screen. If you are scanning with a WIA-compliant
application or the "Scanner and Camera Wizard", click "Adjust
the quality of the scanned picture" or the "Custom settings"
button, and adjust the brightness and contrast in the screen that
appears.
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Have you placed the original straight?
→ Place the original straight on the original table.
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Is the original placed in the correct position?
→ Place the original in the correct position.
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Problem Cause and solution Page
