HL-4570CDW FAQs & Troubleshooting HL-4570CDW Not your product? Sort by: Updated Date Popularity 3 Results 1. 02/22/2013 Install the optional lower tray 2. 11/05/2010 What kind of memory can I use? 3. 07/06/2010 Install extra memory Consumables / Paper / Accessories FAQs & Troubleshooting