MFC-8820DN FAQs & Troubleshooting MFC-8820DN Not your product? Sort by: Updated Date Popularity 2 Results 1. 08/24/2006 Why are my sent faxes always received with a black vertical line down the page? 2. 07/24/2006 How do I improve the copy or fax quality? Fax FAQs & Troubleshooting