Canon imagePROGRAF PRO-300 13" Photographic Inkjet Printer - Manual (Page 257)

Deep Print Head Cleaning
If print quality does not improve by the standard cleaning of the print head, clean the print head deeply.
Cleaning the print head deeply consumes more ink than the standard cleaning of the print head, so clean
the print head deeply only when necessary.
You need to prepare: a sheet of A4 or Letter-sized plain paper
1. Check that printer is turned on.
2. Load a sheet of A4 or Letter-sized plain paper in the top feed.
Loading Paper in the Top Feed
3. Select Maintenance on HOME screen.
LCD and Operation Panel
The Maintenance screen will appear.
4. Select Print Head Cleaning .
The Print Head Cleaning screen will appear.
5. Select Deep Cleaning .
The Deep Cleaning screen will appear.
6. Select ink group to be cleaned.
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