PJ-722 FAQs & Troubleshooting PJ-722 Not your product? Sort by Updated Date Popularity 3 Results 1. 04/12/2023 Where can I find my Brother printer's serial number? 2. 01/05/2016 The paper is jammed in the printer. 3. 12/24/2014 Paper does not move through the printer even though the motor is running. Machine FAQs & Troubleshooting