BT PaperJet 55E - Manual (Page 46)

46
To clean the cartridge and nozzles
If the printing quality deteriorates you can
quickly clear the cartridge and test the
nozzles with a print-out showing their
condition.
Press the Function button until the display
shows HEAD MAINTENANCE
Display shows NEW HEAD: ON
Either
If the cartridge is new, press the Start
button. Your PaperJet 55E performs a print
test.
Or
If the cartridge is not new, press to display
NEW HEAD: OFF
Display shows CLEANING: ON
Your machine performs a print test.
To cancel, press the Stop button.
To interpret the print test, see page 14.
If the printout shows NOZZLE DAMAGED
then you should clean the cartridge
contacts, see opposite.
Manually cleaning the cartridge contacts
Lift the printer compartment cover.
Remove the cartridge.
Use a slightly damp cloth to clean the electrical
contacts taking care not to touch the nozzles.
Use a slightly damp cloth to clean the electrical
contacts of the carriage inside the machine.
Replace the cartridge.
Close the cover.