Epson LX-810 User Manual page 192

Printing
Problem
Dots are missing in
the printed
characters or
graphics.
A line of dots is
missing in the
printout.
A B C D
Dots are missing in
random positions.
A B C D
Printed characters
are not what you
expected.
The typestyle or
characters that are
set by the software
cannot be printed.
7-6 Troubleshooting
Solution
The print head is damaged. Stop printing
and contact your Epson dealer to have the
print head replaced.
There is either too much slack in the
ribbon or the ribbon has come loose and
gotten caught on something. Stop printing,
turn off the printer, and reinstall the
ribbon cartridge. Refer to l-8.
The software may not be correctly
installed for your printer. Use the
program's setup (or install) procedure to
check the printer settings, and reset as
needed.