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How to update the root certificate of the Epson WF-3640 Series

1. Click the button in the top right corner of the printer's screen. 

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2. Find the IP Address of the printer. 

3. Type the IP Address into your web browser. 

4. Click Basic Settings on the left side of the page. 

5. Click Root Certificate Update. 

6. Click Start and then follow the on-screen instructions. 

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