HL-3040CN FAQs & Troubleshooting HL-3040CN Not your product? Sort by: Updated Date Popularity 4 Results 1. 21/08/2013 Clean the drum unit 2. 20/08/2013 Clean the corona wire 3. 26/09/2011 Clean the LED head 4. 26/09/2011 Clean the paper pick-up roller Cleaning FAQs & Troubleshooting