HL-4070CDW FAQs & Troubleshooting HL-4070CDW Not your product? Sort by: Updated Date Popularity 4 Results 1. 09/11/2022 Replace the drum unit. 2. 09/11/2022 How do I replace the Belt Unit? 3. 28/07/2022 How do I replace the Waste toner box? 4. 19/02/2021 Replace the toner cartridge More FAQs Video FAQs FAQs & Troubleshooting