Epson LQ-860 User Manual page 40

Problem
Dots are missing in
the printed
characters or
graphics.
(continued)
Dots are missing in
random positions.
A B C D
If the printer still does not print the self test correctly, contact your
Epson dealer or Epson authorized service center.
1-26 Setting Up the Printer
Solution
There is either too much slack in the
ribbon or the ribbon has come loose and
caught on something. Stop printing, turn
off the printer, and reinstall the ribbon
cartridge.