Samsung SCX-4521FG manual Common Linux Problems, Problem Possible Cause and Solution

Common Linux Problems

Problem	Possible Cause and Solution
The machine	• Check if the printer driver is installed in your system.
doesn’t print.	Open MFP configurator and switch to the Printers tab in
	Printers configuration window to look at the list of
	available printers. Make sure that your machine is
	displayed on the list. If not, please, invoke Add new
	printer wizard to set up your device.
	• Check if the printer is started. Open Printers
	configuration and select your machine on the printers list.
	Look at the description in the Selected printer pane. If its
	status contains “(stopped)” string, please, press the
	Start button. After that normal operation of the printer
	should be restored. The "stopped" status might be
	activated when some problems in printing occurred. For
	instance, this could be an attempt to print document
	when MFP port is claimed by a scanning application.
	• 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. You should open MFP ports configuration
	and select the port assigned to your printer. 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
	owner is not functioning properly.
	Check if your application has special print option such
	as “-oraw”. If “-oraw” is specified in the command
	line parameter then remove it to print properly. For
	Gimp front-end, select “print” -> “Setup printer” and
	edit command line parameter in the command item.

Problem	Possible Cause and Solution
The machine	• Check if your machine is attached to your computer.
doesn’t appear	Make sure that it is connected properly via the USB port
on the	and is turned on.
scanners list.	• Check if the scanner driver for you machine is installed in
	your system. Open MFP Configurator, switch to Scanners
	configuration, then press Drivers. Make sure that driver
	with a name corresponding to your machine's name is
	listed in the window.
	• 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 displays.
	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.
The machine	• Check if a document is loaded into the machine.
doesn’t scan.	• 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.
The machine	• To identify the source of the problem, you should open
doesn’t scan.	MFP ports configuration and select the port assigned to
(continued)	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.

9.12 Troubleshooting