Canon PIXMA MG3000 Series Online Manual page 237

If there are any foreign objects in the rear tray, be sure to turn off the printer, unplug it from the power supply,
then remove the foreign object.
Clean paper feed roller.
Check7
Cleaning Paper Feed Rollers
Note
• Cleaning the paper feed roller abrades it, so do this only when necessary.
If the measures above do not solve the problem, contact your nearest Canon service center to request a
repair.
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