Samsung CLP 500N - Manual (Page 150)

M AINTAINING Y OUR P RINTER 6.32
3 Pull the handle lightly first, and then holding the toner
cartridges, remove them from the printer. Set them on a
clean flat surface.
4 Press the top cover release button to unlatch the top cover
and open it all the way.
C AUTION : If you open the left cover for a few minutes, the
imaging unit can be exposed to light. This causes damage to the
imaging unit. Close the top and left cover should the setup need to
be halted for any reason.