Canon PIXMA G5020 Wireless MegaTank Printer - Manual (Page 339)

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, wait for more than 24 hours, and go to the next step.
Step4 Clean the print head deeply again.
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.
Step5 Perform ink flush.
After performing ink flush, print the nozzle check pattern and check the result.
Ink flush consumes a great amount of ink. Frequent ink flush can rapidly consume ink, so perform it only when necessary.
How to Do Ink Flush
If the nozzle check pattern is not printed correctly even after performing ink flush, check the installing condition of
the print head.
Check Installation of Print Head
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