Canon Color imageRunner C3220 Reference Manual page 416

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7-36 Replacing the Waste Toner Container
Pull out the waste toner container.
CAUTION
When removing the waste toner container, be careful not to tilt it, as the
toner may spill and get onto your hands or clothing. If toner gets onto your
hands or clothing, wash them immediately with cold water. Washing them
with warm water will set the toner, and make it impossible to remove the
toner stains.
Use the provided cover to cover up the opening of the used
waste toner container.