Canon iPF8000 series Service Manual page 171

Chapter 5
4) Using a damp cloth that you have wrung out completely, wipe inside the Top Cover to clean it. Wipe away any ink residue on the Top Cover Roller [1], all over
the Platen [2], the Pinch Roller Unit [3], the Borderless Printing Ink Grooves [4], the Ejection Guide [5], the cutter guide [6], the maintenance-jet tray [7], and so on.
[7]
[1]
[5]
[4]
[2] [4] [6] [3]
F-5-3
5-3