Back Of Paper Is Smudged - Canon MB5400 SERIES Online Manual

Back of Paper Is Smudged

Check paper and print quality settings.
Check1
Print Results Are Unsatisfactory
Perform bottom plate cleaning to clean inside of printer.
Check2
Cleaning Inside the Machine (Bottom Plate Cleaning)
Note
• During duplex printing or too much printing, ink may stain the inside of the printer.
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