Epson EPL-6200 Reference Manual page 409

Your paper may be moist or
damp.
The Toner Save mode may be
on.
There may be a problem with
the developer cartridge.
The image is too dark
Cause
There may be a problem with
the developer cartridge.
Non-printed side of the page is dirty
Cause
Toner may have spilled onto
the paper feed path.
392
Troubleshooting
The higher the moisture content in the
paper, the lighter the printed output. Do
not store paper in a humid or damp
environment.
Turn off the Toner Save mode using the
printer driver.
Take out the developer cartridge, shake
it gently from side to side to distribute
the toner, and then reinstall it. If the
problem persists, replace the cartridge
as described under "Developer
Cartridge" on page 306.
What to do
If the problem persists, replace the
developer cartridge as described under
"Developer Cartridge" on page 306.
What to do
Turn off the printer. Clean internal
printer components.