Adjust Print Quality : Clean the Print Head

Check the Print Head Nozzles
You can print a nozzle check pattern to check for clogged nozzles using the printer’s buttons or your software.
Using the Printer Buttons
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Hold down the  stop button as you press the  power button to turn the printer back on. Hold down both buttons until the  power light begins to flash, then release the buttons.
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If there are gaps or the pattern is faint, clean the print head.
From the Computer
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Windows: Right-click the  printer icon in the bottom right corner of your screen (the taskbar) and select Nozzle Check.
Macintosh: Open the Applications folder, then the Epson Software folder, and then open Epson Printer Utility 4. Then select Nozzle Check.
You one of these windows:
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Click Print.
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If there are gaps or the pattern is faint, clean the print head.