Epson WorkForce Pro WF-M5799 Workgroup Monochrome Multifunction Printer with Replaceable Ink Pack System - Manual (Page 301)

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Checking the Nozzles Using a Computer Utility
Parent topic: Print Head Maintenance
Checking the Nozzles Using the Product Control Panel
You can check the print head nozzles using the control panel on your product.
1. Make sure there are no errors on the LCD screen.
2. Load a few sheets of plain paper in the product.
3. Press the home button, if necessary.
4. Select Settings > Maintenance > Print Head Nozzle Check .
You see a screen like this:
5. Select Start .
The nozzle pattern prints.
6. Check the printed pattern to see if there are gaps in the lines.
Print head is clean