Canon D480 - ImageCLASS B/W Laser Basic Operation Manual page 185

Replacing the Toner Cartridge
Place the toner cartridge on a fl at surface
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and pull the seal completely out.
If toner is adhered on the removed seal, be careful
that your hands or clothes do not get dirty from
touching the toner.
Do not pull the seal out at an angle.
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Hold the toner cartridge by its handle (A).
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Do not open the drum protective shutter on the
toner cartridge. Print quality may deteriorate if the
drum surface is exposed to light or is damaged.
Always hold the toner cartridge by its handle.
Insert the toner cartridge so that the
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protrusion (A) on the right side of the
toner cartridge fi ts into the guide (B)
located on the right side of the machine
and slide it down parallel to the guide.