If the nozzles are clogged, the printouts become faint, there is visible banding, or unexpected colors appear. If the nozzles are severely clogged, a blank sheet will be printed. When print quality has declined, first use the nozzle check feature to check if the nozzles are clogged. If the nozzles are clogged, clean the print head.
Do not open the Ink supply unit cover or turn off the printer during head cleaning. If the head cleaning is incomplete, you may not be able to print.
Head cleaning consumes ink and should not be performed more than necessary.
When ink is low, you may not be able to clean the print head.
If print quality has not improved after repeating nozzle check and head cleaning 4 times, wait for at least 6 hours without printing, and then run the nozzle check again and repeat the head cleaning if necessary. We recommend turning off the printer by using the 
button. If print quality has still not improved, run Power Cleaning.
To prevent the print head from drying out, do not unplug the printer while the power is on.