HP LaserJet 4000 Printer series - Manual (Page 67)

56 Chapter 3: Printer Maintenance
EN
Managing the Toner Cartridge
HP Policy on Non-HP Toner Cartridges
Hewlett-Packard Company cannot recommend use of non-HP toner
cartridges, either new or remanufactured. Because they are not HP
products, HP cannot influence their design or control their quality.
To install a new HP toner cartridge and recycle the used cartridge,
follow the instructions included in the toner cartridge box.
Toner Cartridge Storage
Do not remove the toner cartridge from its package until you are
ready to use it. (The shelf life of a cartridge in an unopened package
is approximately 2.5 years.)
Caution To prevent damage to the toner cartridge, do not expose it to light
for more than a few minutes.
Toner Cartridge Life Expectancy
The life of the toner cartridge depends on the amount of toner that
print jobs require. When printing text at 5% coverage, an HP toner
cartridge lasts an average of 10,000 or 6,000 pages, depending on
which toner cartridge is installed. (A typical business letter is about
5% coverage.) This assumes that print density is set to 3 and
EconoMode is off. (These are the default settings.)