Epson EPL-N2000 User Manual page 119

If you are using the serial interface, set the baud rate, protocol,
data bit, and related settings. See your computer manual for the
correct settings and interface requirements.
If you are using a parallel interface, check the Speed setting in
SelecType to match the value the computer requires. You may
have to set Speed to Normal and Bi-Di to Off if you are having
communication problems with your printer. See Chapter 3 for
details on setting SelecType settings.
Make sure that your software is properly set up for your printer.
The imaging cartridge may be empty; if necessary, replace it as
described in Chapter 5.
The font selected in your software won't print correctly.
The selected font is not supported by your printer; see
the Introduction or the Technical Information manual for more
information.
If Image Optimum is set to Auto or On, fonts may be changed to
increase print speed. Set Image Optimum to Off in the printer
driver or the SelecType Config menu; see Chapters 2 and 3 for
details.
The output is garbled or printed as asterisks (*).
If you use the Remote Control Panel, check whether any settings
have been changed by another user; see the Technical Information
manual for details.
Make sure that both ends of the interface cable are plugged in
securely. Also be sure you use a double-shielded, twisted-pair
parallel interface cable no longer than six feet in length for
Parallel B; no longer than 30 feet in length for Parallel C.
If you are using an optional serial interface, set the parity, baud
rate, number of data bits, and number of stop bits to match your
computer; see your computer manual for details.
Troubleshooting 6-15