HL-4570CDW FAQs & Troubleshooting HL-4570CDW Not your product? Sort by: Updated Date Popularity 4 Results 1. 30/08/2010 Clean the drum unit 2. 30/08/2010 Clean the inside of the machine 3. 06/07/2010 Clean the paper pick-up roller 4. 06/07/2010 Clean the corona wire Cleaning FAQs & Troubleshooting