Epson WorkForce Pro WF-C8690 A3 Color MFP with PCL/PostScript - Manual (Page 49)

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You see a screen like this:
4. Select Basic Settings .
5. Scroll down and set Operation Time Out to Off .
Parent topic: Using the Control Panel
Preventing PC Connection via USB
You can disable access from a USB-connected computer. This restricts non-network access to the
product and protects the security of confidential scanned documents.
1. Press the home button, if necessary.
2. Select Settings .
3. Select General Settings .
You see a screen like this:
4. Select Printer Settings .