Canon imageRUNNER C3489 Reference Manual page 378

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Replacing the Toner Cartridge
WARNING
Do not burn or throw used toner cartridges into open flames, as this may
cause the toner remaining inside the cartridges to ignite resulting in burns
or a fire.
IMPORTANT
If the toner cartridge cannot be pulled out, check that the knob is turned all the way
to the appropriate position.
Hold the new toner cartridge in your hands, as shown below,
and gently tilt it up and down five times.
Push the new toner cartridge in as far as possible.
Black Toner Cartridge
IMPORTANT
When replacing toner cartridges, make sure that the color of the toner cartridge
matches the color of the toner supply port. If the color is different, the toner
cartridge will not fit into the port.
Cyan, Magenta, or
Yellow Toner Cartridge