The HP ColorLaserJet 2840's fax function
What's more, you can send faxes with the HP ColorLaserJet 2840 – with a speed of 3 seconds per page. There are five speed dial buttons on the front of the device and up to 120 numbers can be saved. The internal 96MB memory can be expanded to a maximum of 224MB. The multifunction device can be used with Windows and Macintosh operating systems and integrated into your own network. The manufacturer specifies that the optimal use is a monthly printing volume of 30,000 pages.
Replacing toner for the HP ColorLaserJet 2840
The scanner unit must be opened in order to replace the toner. Then, the upper cover can be opened and the empty cartridge can be removed. Subsequently, the protective cover is removed from the toner cartridge, and the cartridge is inserted. The blue release lever must be pressed firmly. The cartridge must be inserted in such a way that you can feel it click into place. Finally, the scanner unit and the upper cover can be closed.