Canon PIXMA MG4200 Series On-Screen Manual page 923

Home > Troubleshooting > Problems with Printing Quality
Paper Is Smudged
U318
Back of the Paper Is Smudged
Check 1: Did you confirm the paper and print quality settings?
Print Results Not Satisfactory
Check 2: Perform the Bottom Plate Cleaning to clean the inside of the
machine.
Cleaning the Inside of the Machine (Bottom Plate Cleaning)
Note
When performing borderless printing, duplex printing, or too much printing, the inside may
become stained with ink.
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