Canon imageRUNNER ADVANCE C9270 PRO Basic Operation Manual page 86

Fix the inner size change plate with the two blue screws using a coin or
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something similar, while slightly holding its center front portion, and pressing it
away from you.
Fasten the right blue screw before fastening the left blue screw.
If you fasten the blue screws without pressing the inner size change plate away from you, the plate may be
fi xed at an angle. If you use the paper deck with a tilted inner size change plate, paper may be fed as slanted,
poor print quality may result, and paper jams may occur. Therefore, make sure to fasten the blue screw while
pressing the inner size change plate away from you.
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