Canon ImagePROGRAF iPF650 Series Service Manual page 197

5) If paper dust has accumulated in the suction holes [1] on the Platen, the borderless printing ink grooves [2], use the included Cleaning Brush [3] to wipe it away.
MEMO:
If the Cleaning Brush is dirty, rinse it in water.
4) Using a damp cloth that you have wrung out completely, wipe inside the Upper Cover to clean it. Wipe away any ink residue on all over the Platen [1], the Pinch
Roller Unit [2], the Borderless Printing Ink Grooves [3], the Output Guide [4], and so on.
[2] [3]
F-5-3
[1] [3] [2]
[4]
F-5-4
[1]
Chapter 5
5-3