Fujitsu S510 Operator's Manual page 248

Symptom
The image scanned is too
light or too dark.
Lines on the document
are blurred.
(Example: Ruled lines on
a table cannot be seen.)
The scanning speed is
very slow.
Multi-feed errors (*2)
occur frequently.
228
Check This Item
Is the "Brightness (Black
and White scanning only)"
setting on [Option] of the
[Scanning] tab set to
extremely Light or Dark?
Are you scanning in color
mode, documents including
handwritten or typed text,
tables or frames with ruled
lines?
Does your PC meet the
recommended system
requirements?
Is the USB 1.1 connected?
Note: When using an
USB1.1 interface, the data
transfer rate may be slower
due to large data sizes.
Is the Pad ASSY dirty?
Is the Pad ASSY worn?
Is the document stack
thicker than 5 mm?
Resolution
Adjust "Brightness" at [Scanning]
[Option] in the "ScanSnap Manager -
Scan and Save Settings" dialog box.
The color mode is used for capturing
colored images like photos in high
quality. For other documents including
textual content, select the checkbox
for [Setting for text only document] at
[Scanning] [Option] in the
"ScanSnap Manager - Scan and Save
Settings" window.
If it does not improve even after you
have tried this method, change
"Image quality" setting.
Confirm the system requirements in
"Before Installing the Supplied
Programs for the ScanSnap" (page 6).
Scanning speed will be slower
whenever the recommended CPU
and memory requirements are not
met.
If this is the case, at [Scanning]
[Option] in the "ScanSnap Manager -
Scan and Save Settings" dialog box,
clear the checkboxes of the following
to increase the scanning speed.
•
Correct skewed character strings
automatically
•
Allow automatic image rotation
If your PC has an USB 2.0 port,
connect the ScanSnap to this port. (If
using a USB hub, it must also support
USB 2.0 interfaces.) (*1)
Replace the pad by following the
instructions in "8.3 Cleaning the
Inside of the Scanner" (page 238).
Replace the Pad ASSY by following
the instructions in "9.2 Replacing the
Pad ASSY" (page 246).
Reduce the number of sheets in the
document stack to 5 mm thickness or
less.