Epson EPL-6100 Reference Manual page 223

The paper path inside the
printer may be dusty.
You may not be using the
correct type of paper for your
printer.
The setting of Density may be
dark.
There may be a problem with
the developer cartridge.
There may be a problem with
a photoconductor unit.
Black or white bands appear in the printout
Cause
The paper path inside the
printer may be dusty.
Turn off the printer. Clean internal
printer components by printing three
pages with only one character per page.
If the surface of your paper is too rough,
printed characters may appear
distorted or broken. Smooth,
high-quality copier paper is
recommended for best results. See
"Available paper types" on page 127 for
information on choosing paper.
Lighten Density in the printer driver of
Windows and Macintosh.
Turn off the printer. Remove the
cartridge, shake it gently from side to
side, and then reinstall it. If this does not
solve the problem, replace the
developer cartridge as described under
"Replacing the Developer Cartridge"
on page 73.
Replace the photoconductor unit. See
"Replacing the Photoconductor Unit"
on page 80 for instructions.
What to do
Turn off the printer. Clean internal
printer components by printing three
pages with only one character per page.
Troubleshooting
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