Canon IMAGERUNNER 2030 i Reference Manual page 315

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7-22
Replacing the Toner Cartridge
WARNING
Do not throw used toner cartridges into open flames, as they may ignite
the toner remaining inside the toner cartridge, and result in burns or a fire.
Rock the new toner cartridge back and forth (five or six times)
to distribute the toner evenly inside the toner cartridge.
IMPORTANT
If the toner is not distributed evenly inside the toner cartridge, print quality may
deteriorate.
Make sure that the side with the label is facing up, and insert
the new toner cartridge into the machine as far as it will go.
Support the new toner cartridge with one hand from underneath, while pushing it
into the machine with your other hand.