With a dry and lint-free cloth, wipe away any dust and
spilled toner from the toner cartridge area and the toner
: To prevent damage to the toner cartridge, do not
expose it to light for more than a few minute. Cover it with a piece
of paper, if necessary. Also, do not touch the black transfer roller
inside the printer.
Locate the long strip of glass (LSU) inside the top of the
cartridge compartment, and gently swab the glass to see if
dirt turns the white cotton black.
Reinsert the toner cartridge and close the cover.
Plug in the power cord and turn the printer on.