MFC-8690DW FAQs & Troubleshooting MFC-8690DW Not your product? Sort by: Updated Date Popularity 1 Results 1. 09/22/2011 Why is the error message "Scan Unable XX" displayed on the LCD when I try the 2-sided(duplex) copy, 2-sided(duplex) scan or fax send of a legal size document? Copy FAQs & Troubleshooting