MFC-7840W FAQs & Troubleshooting MFC-7840W Not your product? Sort by: Updated Date Popularity 3 Results 1. 30/01/2014 How do I clear paper jams inside the machine? 2. 24/01/2008 How do I clear paper jams inside the drum unit and toner cartridge assembly? 3. 24/01/2008 How do I clear paper jams at the back of the machine? More FAQs Paper Feed / Paper Jam FAQs & Troubleshooting