BT Fax User Manual page 14

Close the paper tray.
Your PaperJet 300 is supplied with a black
cartridge. You can also install a colour
cartridge for colour printing from a PC.
Do not touch the print head on the ink
cartridge. Do not rest the print head on any
surface. Do not shake the ink cartridge.
Pull open the control panel.
12
Open the cartridge cover.
The ink cartridge carrier should have
automatically moved to the centre position.
If it has not moved, press the
button.
Holding it by the finger grip, peel the
protective film from the print nozzles.
Avoid touching the nozzles and metal
electrical contacts.