Epson L380 User Manual page 17

You see this window:
4. Select the length of time after which you want the product to automatically turn off when it is not in
use as the Power Off Timer setting.
5. Select the time period you want before the product goes to sleep as the Sleep Timer setting.
6. Click Apply.
7. Close the Printer Settings window.
Parent topic: The Power Off and Sleep Timers
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