MFC-620CN FAQs & Troubleshooting MFC-620CN Not your product? Sort by: Updated Date Popularity 3 Results 1. 22.11.2011 When I print, the pages are smudged with ink. What should I do? 2. 06.11.2009 One or more of my colors are not printing (blank). What can I do? 3. 29.08.2006 Why are my sent faxes always received with a black vertical line down the page? Fax FAQs & Troubleshooting