Samsung SCX-4720FN - Manual (Page 235)

T ROUBLESHOOTING 9.30
The machine doesn’t
scan
• Check if a document is loaded into the machine.
• Check if your machine is connected to the computer. Make
sure if it is connected properly if I/O error is reported while
scanning.
• Check if MFP port is not busy. Since functional components
of MFP (printer and scanner) share the same I/O interface
(MFP port), the situation of simultaneous access of
different “consumer” application to the same MFP port is
possible. To avoid possible conflicts, only one of them at a
time is allowed to gain control over the device. The other
“consumer” will encounter “device busy” response. This
can usually happen while starting scan procedure, and
appropriate message box will be displayed.
To identify the source of the problem, you should open MFP
ports configuration and select the port assigned to your
scanner. MFP port’s symbol /dev/mfp0 corresponds to LP:0
designation displayed in the scanners’ options, /dev/mfp1
relates to LP:1 and so on. USB ports start at /dev/mfp4, so
scanner on USB:0 relates to /dev/mfp4 respectively and so
forth sequentially. In the Selected port pane you can see if
the port is occupied by some other application. If this is the
case, you should wait for completion of the current job or
should press Release port button, if you are sure that the
present port’s owner is not functioning properly
.
I can’t print when I
installed both Linux
Print Package (LPP) and
MFP driver on the same
machine
simultaneously.
• Since both Linux Printer Package and MFP driver make a
symbolic link to “lpr” printing command, which is
commonly used on Unix clones, it is not recommended to
use both package on the same machine.
• If you still want to use both packages simultaneously,
please install the LPP first.
• If you want to uninstall only one of them, please uninstall
both packages and install that one you want to use again.
• If you don’t want to uninstall MFP driver and install it
again, you may make the necessary symbolic link yourself.
Please, log in as root user and invoke the following
command:
ln -sf /usr/local/bin/samsung/slpr /usr/bin/lpr
Can’t scan via Gimp
Front-end.
• Check if Gimp Front-end has “Xsane:Device dialog..” on the
“Acquire” menu. If not, you should install Xsane plug-in for
Gimp on the your computer. You can find Xsane plug-in
package for Gimp on Linux distribution CD or Gimp home
page. For the detail information, refer to the Help for Linux
distribution CD or Gimp Front-end application.
If you wish to use other kind of scan application, refer to the
Help for application.
Problem Possible Cause and Solution