JA1400 FAQs & Troubleshooting JA1400 Not your product? Sort by Updated Date Popularity 3 Results 1. 03/04/2023 How do I draw up the lower thread? 2. 21/01/2016 How do I wind the bobbin? 3. 17/11/2015 How do I install the bobbin wound with thread? Getting Ready FAQs & Troubleshooting