Canon imagePROGRAF PRO-300 PRO-300 series User Manual - Page 490

• 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. When you turn the printer off, do not unplug it from the power supply. 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 Request a repair. 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 Print Head. Check4 When using paper with one printable surface, make sure paper is loaded with printable side facing up. Printing on the wrong side of such paper may cause unclear prints or prints with reduced quality. Refer to the instruction manual supplied with the paper for detailed information on the printable side. 490