Oki pmnC3100 User Manual page 57

then lower the right end of the cartridge onto the image drum
unit.
Pressing gently down on the cartridge to ensure that it is firmly
11.
seated, push the coloured lever (1) towards the rear of the
printer. This will lock the cartridge into place and release toner
into the image drum unit.
Finally, close the top cover and press down firmly at both sides
12.
so that the cover latches closed.
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