Oki 1220n User Manual page 128

3. Pull the colored toner release lever on the cartridge to be
replaced (here we are showing replacement of the black toner
cartridge) towards the front of the printer.
4. Lift the right-hand end of the cartridge and then pull the cartridge
to the right to release the left-hand end as shown. Remove the
toner cartridge and discard it in accordance with your local
regulations.
ES 1220n Replacing Consumables • 221