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