DCP-J4120DW FAQs & Troubleshooting DCP-J4120DW Not your product? Sort by: Updated Date Popularity 2 Results 1. 24/12/2014 Print using only the black ink cartridge when the Color cartridges have run out. 2. 23/06/2014 Copy on Both Sides of the Paper (1-sided to 2-sided) Copy FAQs & Troubleshooting