Canon i 250 - Manual (Page 34)

Printing Maintenance
32
Note z After print head deep cleaning finishes, print the nozzle check
pattern to verify that the print head nozzles are clean.
See "Printing the Nozzle Check Pattern Printing the Nozzle Check Pattern Printing the Nozzle Check Pattern Printing the Nozzle Check Pattern" """ on page 26.
z If the head is still not clean after the second deep cleaning, replace
the ink tank.
See "Replacing an Ink Tank Replacing an Ink Tank Replacing an Ink Tank Replacing an Ink Tank" """ on page 36.
z If ink tank replacement does not resolve the problem, the print head
may be worn out. Contact the Customer Care Center.