Brother HL-1870n Network User's Manual page 126

3. If you cannot make any of the connections in step 2, check the
following:
a. Make sure the printer is powered on and on-line.
b. Verify that the cabling, network connection, and print out a
configuration page in the Network STATISTICS information to see
if bytes are being transmitted and received.
c. Check to see if there is any LED activity.
The print servers have three LEDs. These can be used to diagnose
problems.
•
L- LED (green): Link activity
This LED is on if there is a valid connection to the network (either
10BaseT or 100BaseTX). It is off if no network is detected.
•
F-LED (orange): Fast Ethernet
This LED will be on if the print server is connected to a 100BaseTX
Fast Ethernet network. It is off if the print server is connected to a
10BaseT network.
•
A-LED (green): Transmission Activity
This LED will blink synchronized to the transmission or receive
status.
4. If you are using a repeater or hub, make sure that SQE (heartbeat) is
turned off at the hub (if applicable). Also, if you have a hub or multi-port
repeater, verify that the hub or repeater port is good by trying the print
server on a different port or on the other hub or multi-port repeater.
5. If you have a bridge or router located between the print server and host
computer, make sure that the device is set up to allow the print server to
send and receive data from the host. For example, a bridge can be set up
to only allow certain types of Ethernet addresses to pass through (a
process known as filtering); therefore, such a bridge must be configured
to allow Brother print server addresses. Likewise, a router can be set up
to pass only certain protocols, so be sure that the desired protocol can be
passed through to the print server.
6. If the job exits the queue but does not print, make sure that you are not
trying to print a text job to a PostScript printer. If you have a printer that
is capable of automatic language switching, make sure that the printer is
not forced into PostScript mode.
CHAPTER 13 TROUBLESHOOTING
13-4