FAX-2840 FAQs & Troubleshooting FAX-2840 Not your product? Sort by: Updated Date Popularity 4 Results 1. 11/20/2018 Clean the corona wire 2. 08/06/2012 Clean the drum unit 3. 08/03/2012 Clean the paper pick-up roller. 4. 06/21/2012 Clean the scanner to improve the copy or fax quality. Cleaning FAQs & Troubleshooting