MFC-J3940DW FAQs & Troubleshooting MFC-J3940DW Not your product? Sort by: Updated Date Popularity 4 Results 1. 19.12.2022 Improve poor print quality. 2. 28.06.2022 Clean the Paper Pick-up Rollers for Paper Tray #2 and Paper Tray #3 3. 28.06.2022 Clean the Paper Pick-up Rollers for Paper Tray #1 4. 28.06.2022 Clean the Print Head from Your Brother Machine Cleaning FAQs & Troubleshooting