Epson WorkForce Pro WF-7820 All-in-One Inkjet Printer - Manual (Page 285)

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Print Head Nozzle Check
You can print a nozzle check pattern to check for clogged nozzles.
Checking the Nozzles Using the Product Control Panel
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 .
You see a screen like this:
5. Select Print Head Nozzle Check .