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. 03/28/2022 I cannot save a file downloaded from the Brother support website (For Windows) 3. 07/03/2020 Installing the software Installation FAQs & Troubleshooting