Samsung CLX-3160FN Service Manual page 149

Troubleshooting
Condition
The machine does not scan.
I cannot print when I installed both
Linux Print Package (LPP) and
MFP driver on the same machine
simultaneously.
I cannot scan via Gimp Front-end.
I encounter error "Cannot open
MFP port device file" when printing
a document.
Service Manual
7-14
Suggested solutions
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 the 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 scan-
ners' 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.
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
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.
Please avoid changing print job parameters (via SLPR utility, for example)
while a print job is in progress. Known versions of CUPS server break the
print job whenever print options are changed and then try to restart the job
from the beginning. Since Linux MFP driver locks MFP port while printing, the
abrupt termination of the driver keeps the port locked and therefore
unavailable for subsequent print jobs. If this situation occurred, please, try to
release the MFP port.
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