What maintenance is required for the LaserJet 2400 Series printers?

A.
Replace fuser and pickup rollers at 500K pages

B.
Clean the paper path; run a cleaning page at irregular intervals

C.
Clean the paper path, clean the printer interior and exterior of dust and debris once a year

D.
Clean the paper path, print cartridge areas and fuser each time the toner cartridge is replaced or
when print quality problems occur