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.
Turn off the auto line feed setting in the printer’s Default Setting
mode. See “Changing default settings” on page 25.
The line space setting in your application
software is incorrect.
Adjust the line space setting in your application software.
The printer prints strange symbols, incorrect fonts, or other inappropriate characters.
Cause
What to do
Your printer and computer are not
communicating correctly.
Make sure that you use the correct interface cable and that the
communications protocol is correct. See “Electronic” on
page 109 and your computer documentation.
The wrong character table is selected in your
software.
Select the correct character table using your software or the
Default Setting mode. The character table setting made in your
software takes priority over the settings made in the Default
Setting mode.
The printer you want to use is not selected in
your software
Choose the correct printer in your application before printing.
Your application software is not configured
correctly for your printer.
Make sure that your application software is configured correctly
for your printer. See your application documentation. If
necessary, install or reinstall the printer driver software as
described in the supplied setup sheet.
Software settings override settings you make
using the Default Setting mode or the control
panel buttons.
Use your application software to select the font.
Vertical printed lines are not aligned.
Cause
What to do
Bidirectional printing, which is the printer’s
standard printing mode, is out of alignment.
Use the printer’s bidirectional adjustment mode to correct this
problem. See “Aligning Vertical Lines in Your Printout” on
page 88.
Printing position problems
Your printing appears too high or low on the page.
Cause
What to do
The paper size setting in your application
software or printer driver does not match the
size of the paper you are using.
Check the paper size setting in your application or printer driver.
LQ-780/LQ-780N User’s Guide
Troubleshooting
78
