Canon E3400 Series Online Manual page 218

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• 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.
218
If Printing

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