Oki C610dtn User Manual page 86

(a) Pull the colored toner release lever on the cartridge to be
replaced fully towards the front of the printer.
(b) Lift the right-hand end of the cartridge and then draw the
cartridge to the right to release the left-hand end as
shown, and withdraw the toner cartridge out of the printer.
3. Put the cartridge down gently onto a piece of paper to
prevent toner from marking your furniture
4. Clean the top of the ID unit with a clean, lint free cloth.
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– C610/C711 User's Guide
2b
2a