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 Epson Stylus C120 control panel or your software.
From the Control Panel
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Hold down the  paper button as you press the  power button to turn the Epson Stylus C120 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, open the EPSON Printer Utility 2, select Stylus C120, and click OK. Then select Nozzle Check.
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Click Print.
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If there are gaps or the pattern is faint, clean the print head.