Canon MG7100 series Online Manual page 223

(1) Follow the message to remove any paper from the paper source you
selected in (5) of step 2.
(2) Tap OK.
The paper feed roller will rotate as it is cleaned.
4. Clean the paper feed roller with paper.
(1) Make sure that the paper feed roller has stopped rotating, then follow
the message to load plain paper as follows in the paper source you
selected in (5) of step 2.
Loading paper in the cassette (upper):
Cut a single sheet of A4 or Letter-sized plain paper into four pieces.
Load them in the cassette (upper) with the top and bottom edges
back side of the cassette (upper).
Loading paper in the cassette (lower):
Load three sheets of A4 or Letter-sized paper in the cassette (lower).
(2) Holding both sides of the paper output tray, gently open it.
The output tray extension will open automatically when the paper output tray is
opened.
(3) Extend the paper output support.
Important
If the inner cover is open, close it.
(4) Tap OK.
The machine starts cleaning. The cleaning will be complete when the paper is
ejected.
(5) When the completion message appears, tap OK.
The screen will return to the Maintenance screen.
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(A) towards the