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.
Because print head cleaning uses some ink, it may not be performed when ink is low.
If print quality has not improved after repeating nozzle check and head cleaning 4 times, wait for at least 6 hours without printing, run the nozzle check once again and repeat 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.
You can check and clean the print head by using the printer's control panel.
Select Settings on the printer's control panel.
Select Maintenance > Print Head Nozzle Check.
Follow the on-screen instructions to print the nozzle check pattern.
Check the printed pattern to see if the print head nozzles are clogged.
. No further steps are needed.
, and then select Print Head Cleaning on the next screen.
When Print Head Cleaning is finished, print the nozzle check pattern again. Repeat cleaning and printing the pattern until all lines are printed completely.