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The paper is stuck together with static
electricity.
The printout is pale.
Cause
The ribbon is worn out.
The printout is faint.
Cause
The ribbon is worn out.
Part of the printout is missing, or dots are missing in random positions.
Cause
The ribbon has too much slack, the ribbon has
come loose, or the ribbon cartridge is not
installed properly.
The ribbon is worn out.
Lines of dots are missing in the printout.
Cause
The print head is damaged.
Caution:
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
Fan the paper well before you use it.
What to do
Replace the ribbon cartridge as described in "Replacing the
Ribbon Cartridge" on page 99.
What to do
Replace the ribbon cartridge as described in "Replacing the
Ribbon Cartridge" on page 99.
What to do
Remove any slack in the ribbon by turning the
ribbon-tightening knob, or reinstall the ribbon cartridge as
described in "Replacing the Ribbon Cartridge" on page 99.
Replace the ribbon cartridge as described in "Replacing the
Ribbon Cartridge" on page 99.
What to do
Stop printing and contact your dealer to have the print head
replaced.
What to do
Turn on the auto line feed setting using the printer's Default
Setting mode so that the printer automatically adds a line feed
code to each carriage return. See "Changing default settings" on
page 25.
What to do
LQ-780/LQ-780N
User's Guide
Troubleshooting
77
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