MFC-9140CDN FAQs & Troubleshooting MFC-9140CDN Not your product? Sort by: Updated Date Popularity 5 Results 1. 22.06.2015 Clean the scanner to improve the copy or fax quality 2. 14.02.2013 Clean the LED head 3. 14.02.2013 Clean the paper pick-up roller 4. 14.02.2013 Clean the drum unit 5. 29.01.2013 Clean the corona wires Cleaning FAQs & Troubleshooting