Canon PIXMA TR8620 TR8600 series User Manual - Page 387

If the pattern is not printed correctly, check if the ink tank for the problem color is empty. If the ink tank is not empty, go to the next step. Step2 Clean the print head. 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. Step3 Clean the print head again. 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. Step4 Clean the print head deeply. 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. Step5 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. Step6 Request a repair. 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 If Printing Is Faint or Uneven. Check5 When using paper with one printable surface, check the correct printable side 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. Refer to the instruction manual supplied with the paper for detailed information on the printable side. • When copying, see also the sections below: Check6 Is platen glass or glass of ADF dirty? Clean the platen glass or the glass of ADF. Cleaning Platen and Document Cover Cleaning the ADF (Auto Document Feeder) 387