MFC-7420 FAQs & Troubleshooting MFC-7420 Not your product? Sort by: Updated Date Popularity 3 Results 1. 07/21/2011 Load envelopes, labels, or thick paper into the manual feed slot. 2. 07/21/2011 Load paper. 3. 12/12/2008 How do I load legal size paper in the paper tray? Paper Feed / Paper Jam FAQs & Troubleshooting