Dell 5110cn Color Laser Printer - Manual (Page 205)

Ready to Print
NNN-NNN
XXX
Is Low Toner cartridge is nearly
empty.
XXX is one of the
following:
· Yellow Toner(Y)
· Cyan Toner(C)
· Magenta Toner(M)
· Black Toner(B)
Error NNN-NNN relates
to printer problems.
Replace the specified toner cartridge.
See " Replacing the Toner Cartridge "
Ready to Print
NNN-NNN
Imaging Drum
Replace Soon Drum life warning.
The drum cartridge
needs to be replaced.
Replace the drum cartridge.
See " Replacing the Imaging Drums "