Samsung Laser MFP SCX-4100 - Manual (Page 123)

M
AINTENANCE
7.4
3 With a dry lint-free cloth, wipe away any dust and spilled
toner from the toner cartridge area and the toner cartridge
cavity.
C
AUTION : To prevent damage to the toner cartridge, do not expose
it to light for more than a few minutes. Cover it with a piece of paper,
if necessary. Do not touch the black transfer roller inside the machine.
4
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.
5
Reinsert the toner cartridge and close the cover.
6
Plug in the power cord and turn the machine on.