Oki C650 User Manual page 299

6
Take the new black(K) toner cartridge out of its packing box.
7
Shake the new toner cartridge both horizontally and vertically for several times.
8
Pull the front cover open lever (blue) to open the front cover.
9
Pull out the black(K) toner cartridge from the machine.
10
Install the new black(K) toner cartridge into the machine.
11
Close the front cover firmly with both hands.
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