Epson EPL-5000 Guide De L'utilisateur page 533

TONER
This menu item displays the amount of toner remaining in the imaging
cartridge. You should check this item whenever print quality
deteriorates. If toner is low, prepare a new imaging cartridge for
replacement.
After you install a new imaging cartridge, you should reset the toner
setting as described in Chapter 6 of this manual. This tells the printer
that a new imaging cartridge has been installed.
If you install a used imaging cartridge, you can specify the
approximate amount of toner remaining. To do this, first display the
TONER main menu item and then press r to move to the submenu.
Menu/submenu
A TONER E*****F >
Use u and d to select the toner amount setting you want to set, and
then press r to set it. If your used imaging cartridge has about 50% of
its toner remaining, for example, select E*** F.
For detailed information on replacing the imaging cartridge, see page
6-30.
2-26
SelecType
Available options
NEW
E***** F* (100~80%)
E**** F (80~60%)
E*** F (60~40%)
E** F (40~20%)
E* F (20~0%)