MFC-EX670 FAQs & Troubleshooting MFC-EX670 Not your product? Sort by: Updated Date Popularity 3 Results 1. 10/01/2023 Clean the Drum Unit 2. 10/01/2023 Clean the Scanner 3. 10/01/2023 Clean the Corona Wires More FAQs Cleaning FAQs & Troubleshooting