Epson LQ-860 User Manual page 236

Problem
Using an optional
interface, the printer
does not operate
properly
(continued).
The printer does not
print or the printout is
not what you expected
(continued).
7-36 Troubleshooting
Solution
You may be trying to use an interface
with the wrong specification. Check the
specifications to make sure that you can
use the interface with this printer. See
Chapter 5.
The DIP switch settings may not be set
correctly. Make sure that DIP switches 2-3
and 2-4 are set for parallel, regardless of
whether the optional interface board is
parallel or serial. See Chapter 3. You can
also check the current DIP switch settings
by running the self test.
You may be trying to use a cable with the
wrong specification. Make sure that the
cable matches the specifications of the
interface.
The DIP switches or jumpers on the
interface board may be set incorrectly. See
the interface manual for the correct
settings.
The interface settings on the computer
may be incorrect. See your computer
manual for the correct settings.