HL-4050CDN FAQs & Troubleshooting HL-4050CDN Not your product? Sort by: Updated Date Popularity 4 Results 1. 07.11.2022 How do I replace the Belt Unit? 2. 07.11.2022 Replace the drum unit. 3. 20.07.2022 How do I replace the Waste toner box? 4. 10.02.2021 Replace the toner cartridge Video FAQs FAQs & Troubleshooting