Canon imageRUNNER C3489 Reference Manual page 383

4
Use the provided cover to cover up the opening of the used
waste toner container.
5
Insert the new waste toner container.
When inserting the new waste toner container, line up the part indicated by the
circle on the waste toner container with the main unit, as shown below.
6
Return the lever to its original position.
Lever
Replacing the Waste Toner Container
7
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