Epson EPL-N2750 Reference Manual page 184

Printed image is light or faint
Darken the Density setting in the printer driver. You can also
change this setting from the printer's control panel using
SelecType. For details, see "Config Menu" on page 3-20.
Your paper may be moist or damp. Printing is sensitive to
moisture absorbed by the paper. The higher the moisture content
in the paper, the lighter the printed output. Do not store your
paper in a humid or damp environment.
Take out the imaging cartridge, shake it from side to side to
distribute the toner, and then reinstall it. If the problem persists,
replace the imaging cartridge as described in "Replacing the
Imaging Cartridge" on page 5-2.
The Toner Save mode may be on. Turn off the Toner Save mode
by using the control panel's OneTouch mode 2 or SelecType
Config Menu.
Image is too dark
Darken the Density setting in the Expanded Settings dialog box
accessed through the Optional Settings tab of the printer driver.
You can also change this setting from the printer's control panel
using SelecType. For details, see "Config Menu" on page 3-20.
If the problem persists, replace the imaging cartridge as described
in "Replacing the Imaging Cartridge" on page 5-2.
Non-printed side of the page is dirty
Toner may have spilled onto the paper feed path. Remove the
imaging cartridge and then clean the paper path using a soft, lint-
free cloth. See "Replacing the Imaging Cartridge" on page 5-2 for
more information.
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Warning:
When opening the printer, do not touch the hot areas indicated
on the caution labels inside cover A.
Troubleshooting
6-17