Samsung ML-2010 Series - Manual (Page 51)

M AINTAINING Y OUR P RINTER
4.7
3 Pull the toner cartridge out and remove it from the printer..
4
Remove the manual tray by pulling it out.
5
With a dry, lint-free cloth, wipe away any dust and spilled
toner from the toner cartridge area and the toner cartridge
cavity.
Note: To prevent damage to the toner cartridge, do not expose it
to light for more than few minute. Cover it with a piece of paper, if
necessary. Also, do not touch the black transfer roller inside the
printer.