Canon TR7660 Online Manual page 468

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.
Request a repair.
Step6
If problem is not resolved after performing print head deep cleaning twice, the print head may be damaged. Contact your nearest Canon
service center to request a repair.
For details on printing the nozzle check pattern, print head cleaning, and print head deep cleaning, see
Is Faint or Uneven.
468
If Printing