Epson DLQ-3500 User Manual page 94

The print head is damaged.
Incorrect characters are printed.
Cause
Your printer and the
computer may not be
communicating correctly.
The wrong character table is
selected in your software.
The font or characters set in your application software cannot
be printed.
Cause
Your application software is
not correctly configured for
your printer.
-18
Stop printing and contact your dealer
to have the print head replaced.
w
Warning:
Never try to replace the print
head yourself because other
parts of the printer must be
checked at the same time.
What to do
Make sure that you use the correct
interface cable and that the
communications protocol is correct.
Refer to the Setup Guide and your
computer documentation. If you
installed the optional serial interface
card, also see "Interface Cards".
Select the correct character table in
your software or the printer's default
settings. Note that the character table
setting in your software overrides the
settings made in the default-setting
mode.
What to do
Make sure that your application
software is correctly configured for
your printer. See your application
documentation.