Samsung CLP-310N Service Manual - Page 107

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Alignment & Troubleshooting Continue.. I have CUPS and some options (such as N-up) seem to be always enabled even though I don't choose them in LLPR. I configured a printer to print to a file, but I get "Permission denied" errors. On my PCL (or GDI) printer, I sometimes get error messages printing instead of my document. Some color images come out all black. There may be some local options defined in your ~/ . lpoptions file, which are manipulated by the lpoptions command. These options are always used if not overridden by LLPR settings. To get rid of all options for a printer, run the following command, replacing "printer" with the name of the queue: lpoptions -x printer Most printing systems will not run as the super-user but as a special user (usually "lp"). Therefore, make sure that the file you have chosen to print to is accessible to the user owning the spooler daemon. Unfortunately, some Unix applications may generate non-compliant PostScript output that may not be supported by Ghostscript, or even the printer itself in PostScript mode. You can try to capture the output to a file and view the results with Ghostscript (gv or ghostview will allow you to do so interactively) and see if you get error messages. However, since the application is probably at fault, contact your software vendor to inform them of the issue. This is a known bug in Ghostscript (until GNU Ghostscript version 7.05) when the base color space of the document is indexed color space and it is converted through CIE color space. Because Postscript uses CIE color space for Color Matching System, you should upgrade Ghostscript on your system to at least GNU Ghostscript version 7.06 or later. You can find recent Ghostscript versions at www.ghostscript.com. Service Manual 4-53 Samsung Electronics

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Alignment & Troubleshooting
Service Manual
4-53
Samsung Electronics
I have CUPS and some
options (such as N-up) seem to be always
enabled even though I don't
choose them in LLPR.
There may be some local options defined in your ~/ .
lpoptions file, which are manipulated by the lpoptions
command. These options are always used if not
overridden by LLPR settings. To get rid of all options
for a printer, run the following command, replacing
"printer" with the name of the queue:
lpoptions -x printer
I configured a printer to
print to a file, but I get "Permission
denied" errors.
Most printing systems will not run as the super-user
but as a special user (usually "lp"). Therefore, make
sure that the file you have chosen to print to is
accessible to the user owning the spooler daemon.
On my PCL (or GDI)
printer, I sometimes get error messages
printing instead of my
document.
Unfortunately, some Unix applications may generate
non-compliant PostScript output that may not be
supported by Ghostscript, or even the printer itself in
PostScript mode. You can try to capture the output to
a file and view the results with Ghostscript (gv or
ghostview will allow you to do so interactively) and
see if you get error messages. However, since the
application is probably at fault, contact your software
vendor to inform them of the issue.
Some color images come out all black.
This is a known bug in Ghostscript (until GNU
Ghostscript version 7.05) when the base color space
of the document is indexed color space and it is
converted through CIE color space. Because
Postscript uses CIE color space for Color Matching
System, you should upgrade Ghostscript on your
system to at least GNU Ghostscript version 7.06 or
later. You can find recent Ghostscript versions at
www.ghostscript.com.
Continue..