HL-4150CDN FAQs & Troubleshooting HL-4150CDN 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