Canon MP640 - page 752

Advanced Guide
> Maintenance > Performing Maintenance from a Computer > Cleaning Inside the Machine
Cleaning Inside the Machine
Perform bottom plate cleaning before you execute duplex printing to prevent smudges on the back side
of the paper.
Also perform bottom plate cleaning if ink smudges caused by something other than print data appear on
the printed page.
For details on how to load paper into the machine, see " Cleaning the Inside of the Machine (Bottom Plate
Cleaning)."
The procedure for performing bottom plate cleaning is as follows:
Bottom Plate Cleaning
1. Open the printer driver setup window
2. Click Bottom Plate Cleaning on the Maintenance tab
The Bottom Plate Cleaning dialog box opens.
3. Load paper in the machine
As instructed in the dialog box, fold the A4 size or Letter size plain paper in half horizontally, and then
unfold the sheet.
Load the paper into the rear tray in the portrait orientation with the crest of the crease facing down.
4. Perform the bottom plate cleaning
Make sure that the machine is on and click Execute.
Bottom plate cleaning starts.
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