MFC-9120CN FAQs & Troubleshooting MFC-9120CN Not your product? Sort by: Updated Date Popularity 5 Results 1. 10/31/2011 Clean the LED head 2. 10/31/2011 Clean the Drum Unit 3. 10/31/2011 Clean the scanner to improve the copy or fax quality 4. 10/31/2011 Clean the corona wire 5. 10/15/2010 Clean the paper pick-up roller Cleaning FAQs & Troubleshooting