HL-4040CN FAQs & Troubleshooting HL-4040CN Not your product? Sort by: Updated Date Popularity 3 Results 1. 27/01/2014 How can I clean the corona wire of the drum unit? 2. 22/01/2009 How do I clean the Drum Unit? 3. 31/08/2007 How can I clean the inside of the printer? Cleaning FAQs & Troubleshooting
