PJ-623 FAQs & Troubleshooting PJ-623 Not your product? Sort by Updated Date Popularity 4 Results 1. 04/12/2023 Where can I find my Brother printer's serial number? 2. 11/19/2019 How to reduce the time to start printing after clicking the [Print] button 3. 12/24/2014 The paper is jammed in the printer. 4. 12/24/2014 Paper does not move through the printer even though the motor is running. Machine FAQs & Troubleshooting