Epson EPL-N1600 Reference Manual page 140

If you are using a serial interface, set the parity, baud rate, number
of data bits, and number of stop bits to match the computer.
The emulation setting for the port may not be correct. Specify the
emulation mode with the SelecType.
If the printer still does not print correctly, contact your dealer or
a qualified service person
Position of the printout is not correct
Make sure that you are using the correct page length and margin
settings in your software program.
Graphics don't print correctly
Make sure that your software program is set for the printer
emulation you are using. For example, if you are using the LJ4
emulation mode, be sure that your software program is set to use
a LaserJet 4 printer.
If you are using a serial interface, make sure that you set the parity,
baud rate, number of data bits, and number of stop bits to match
the computer.
Graphics require large amounts of memory; see "Memory
Problems" in this chapter for more help.
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Troubleshooting and Maintenance