Epson PLQ-20 Reference Manual page 112

Lines of dots are missing in the printout.
Cause
The print head is damaged.
Caution:
c
Never replace the print head yourself; you may damage the printer. Also,
other parts of the printer must be checked when the print head is replaced.
All the text is printed on the same line.
Cause
No line feed command is sent
at the end of each line of text.
The printout has extra blank lines between lines of text.
Cause
Two line feed commands are
being sent at the end of each
line of text, because the
printer's auto line feed setting
is on.
What to do
Print the current settings in the default
settings mode and check the pin
condition. See "Changing default
settings" on page 94 to see how to print
them.
If only one pin is broken, other pins can
compensate for it. See "Broken pin
compensation" on page 85 for details.
If more than two pins are broken, stop
printing and contact your dealer to have
the print head replaced.
What to do
Set the Auto line feed setting to On in
the default settings mode so that the
printer automatically adds a line feed
code to each carriage return. See
"Changing default settings" on page 94.
What to do
Set the Auto line feed setting to Off in
the default settings mode. See
"Changing default settings" on page 94.
Chapter 6 Problem Solver 112