Canon TS6420a Online Manual page 362

Print the nozzle check pattern to determine whether the ink ejects properly from the print head nozzles.
Print the nozzle check pattern.
Step1
After printing the nozzle check pattern, examine the pattern.
• For Windows:
Printing a Nozzle Check Pattern
• For macOS:
Printing a Nozzle Check Pattern
If the pattern is not printed correctly, go to the next step.
Clean the print head.
Step2
After cleaning the print head, print the nozzle check pattern and check the result.
• For Windows:
Clean the print head
• For macOS:
Clean the print head
If it does not improve, go to the next step.
Clean the print head again.
Step3
After cleaning the print head again, print the nozzle check pattern and check the result.
If it still does not improve, go to the next step.
Clean the print head deeply.
Step4
After cleaning the print head deeply, print the nozzle check pattern and check the result.
• For Windows:
Clean the print head deeply
• For macOS:
Clean the print head deeply
If it does not improve, turn off the printer for more than 24 hours without disconnecting the power plug, and go to the next step.
Clean the print head deeply again.
Step5
After cleaning the print head deeply again, print the nozzle check pattern and check the result.
If it still does not improve, go to the next step.
Replace the FINE cartridge.
Step6
If problem is not resolved after performing print head deep cleaning twice, the print head may be damaged, or ink may have run out. Replace
the FINE cartridge.
Replacing a FINE Cartridge
For details on printing the nozzle check pattern, print head cleaning, and print head deep cleaning, see
Is Faint or Uneven.
When using paper with one printable surface, check the correct printable side
Check5
of the paper.
Printing on the wrong side of such paper may cause unclear prints or prints with reduced quality.
When you load paper on the rear tray, load paper with the printable side facing up. When you load paper in the
cassette, load paper with the printable side facing down.
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If Printing