Canon MB5100 Series Online Manual page 929

If the ink tank is not empty, perform print head cleaning and try printing the nozzle check pattern again.
• If problem is not resolved after performing print head cleaning twice:
Perform print head deep cleaning.
If the problem is not resolved after performing print head deep cleaning, turn off the printer and perform
print head deep cleaning again 24 hours later. When you turn the printer off, do not unplug it.
• If problem is not resolved after performing print head deep cleaning twice:
If print head deep cleaning does not resolve the problem, the print head may be damaged. Contact your
nearest Canon service center to request a repair.
Perform print head alignment.
Check3
Aligning the Print Head
Note
• If the problem is not resolved after performing the print head alignment, perform print head alignment
manually. See Aligning the Print Head Manually.
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