Canon MP480 series On-Screen Manual page 594

No Printing Results/Printing Is Blurred/Colors Are Wrong/White Streaks
If the Ink Cartridge Locking Cover is not closed securely, ink may not be ejected correctly.
Open the Scanning Unit (Cover), open the Ink Cartridge Locking Cover, then close the Ink Cartridge
Locking Cover.
When you close the Ink Cartridge Locking Cover, push the Ink Cartridge Locking Cover until it clicks
into place.
Check 3: Print the Nozzle Check Pattern and perform any necessary
maintenance operations such as Print Head Cleaning.
Print the Nozzle Check Pattern to determine whether the ink ejects properly from the print head
nozzles.
Refer to
Routine Maintenance
Head Deep Cleaning.
If the Nozzle Check Pattern is not printed correctly:
After performing the Print Head Cleaning, print the Nozzle Check Pattern and examine the
pattern.
If the problem is not resolved after performing the Print Head Cleaning twice:
Perform the Print Head Deep Cleaning.
If the problem is not resolved after performing the Print Head Deep Cleaning, try it again.
If the problem is not resolved after performing the Print Head Deep Cleaning twice:
Ink may have run out. Replace the FINE Cartridge.
Check 4: When a FINE Cartridge runs out of ink, replace it with a new
one.
Check 5: When using paper with one printable surface, make sure that
the paper is loaded with the printable side facing up.
Printing on the wrong side of such paper may cause unclear prints or prints with reduced quality.
Refer to the paper's instruction manual for detailed information on the printable side.
When copying, see also the sections below:
Check6: Make sure that the original is properly loaded on the Platen
Glass.
Loading Paper / Originals
Check7: Is the original loaded with the side to be copied facing down on
the Platen Glass?
Check8: Did you copy a printout done by this machine?
Print from the memory card or from the digital camera directly, or reprint from the computer.
If you copy a printout done by this machine, print quality may be reduced.
for the Nozzle Check Pattern printing, Print Head Cleaning, and Print
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