Epson WF-4720 series - Page 249

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5. When the cleaning cycle is finished, you can check to see if the nozzles are clean; click Print Nozzle
Check Pattern and click Print.
6. Check the printed pattern to see if there are gaps in the lines.
Print head is clean
WF-4720/WF-4730 Series
WF-3720/WF-3730 Series
Print head needs cleaning
WF-4720/WF-4730 Series