Epson EPL-5700 Reference Manual page 66

You may not be using the correct type of paper for your printer.
If the surface of your paper is too coarse, printed characters may
appear distorted or broken. Smooth, high-quality copier paper is
recommended for best results. See "Specifications" on page A-2
for information on choosing paper.
There may be a problem with the developer cartridge. Remove
the cartridge and shake it gently from side to side and then from
front to back to distribute the toner evenly, then reinstall it. If this
does not solve the problem, replace the developer cartridge. For
more information, see "Replacing the developer cartridge" on
page 5-2.
You may need to replace the photoconductor unit. For more
information, see "Replacing the photoconductor unit" on page
5-6.
Black or white bands appear in the printout
Turn off the printer. Clean the paper path inside the printer using
a soft, dry, lint-free cloth.
Clean internal printer components by printing three pages with
only one character per page.
There may be a problem with the developer cartridge. Remove
the cartridge and shake it gently from side to side and then from
front to back to distribute the toner evenly, then reinstall it. If this
does not solve the problem, see "Replacing the developer
cartridge" on page 5-2.
You may need to replace the photoconductor unit. For more
information, see "Replacing the photoconductor unit" on page
5-6.
4-14
Troubleshooting