How do I set up the Power Off Timer to save energy on my ET-2980U?
Press the home button and select Settings > Printer Setup > Power Off Timer. Select the length of time after which you want the product to automatically turn off when not in use, then press the OK button and press the home button to exit. (Page 21)
From the official Epson EcoTank ET-2980U All-in-One Printer manual, page 21
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