Tcp/Ip Troubleshooting; Unix Troubleshooting - Brother HL-6050 Service Manual

CHAPTER 6 TROUBLESHOOTING
8.3

TCP/IP Troubleshooting

If you are using TCP/IP and cannot print to the print server and you have checked the
hardware and network as described in the previous steps, then check the following:
NOTE:
It is always a good idea to try the following in order to eliminate the possibility of setup errors.
• Turn off the printer and then on again,
• Delete and recreate the print server and create a new print queue in order to eliminate the
possibility of setup errors.
(1) The problem may be the result of mismatched or duplicate IP address. Verify that the IP
address is correctly loaded into the print server (via the configuration page). Make sure
that no other nodes on the network have this address (DUPLICATE IP ADDRESS ARE
THE BIGGEST CAUSE OF TCP/IP PRINTING PROBLEMS).
(2) If you used BRCONFIG or NCP to enter the IP address, make sure that you exited the
remote console properly with a CTRL-D or EXIT and that you turned the printer off and
then on again (it may take up to two minutes for the IP address to take effect).
(3) Make sure that the TCP/IP protocol of the print server is enabled.
(4) If you used rarp, make sure that you started the rarp daemon on any workstation using
the rarpd, rarpd-a, or equivalent command. Verify that the /etc/ethers file contains the
correct Ethernet address and that the print server name matches the name in the
/etc/hosts file.
(5) If you used bootp, make sure that you started the bootp daemon on any UNIX
workstation and bootp is enabled (i.e., the "#" is removed from the bootp entry) in the
/etc/bootptab file is correctly configured.
(6) Also verify that host computer and the print server are either on the same subnet,
otherwise that the router is properly configured to pass data between the two devices.
8.4

UNIX Troubleshooting

(1) Make sure that the /etc/printcap file (if applicable) is typed in correctly. In particular, look
for missing ":" and "\" characters, because a small error anywhere in the file can have
major consequences. Also check the /usr/spool directory to make sure that you have
created a valid spool directory.
(2) If you are using a Linux operating system, the X-Window Print tool program that is
included with Linux may not properly configure the etc/printcap file for lpd operation, then
you might also edit the etc/printcap file and change the following line in the entry for the
printer.
(3) If you are using a Berkeley-based UNIX, make sure that the daemon is started on
Berkeley based systems with the command lpc start printer, where printer is the name of
the local print queue.
if
:lp = /dev/null: \
then to
:lp = :\
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