PR650e/PR650eC FAQs & Troubleshooting PR650e/PR650eC Not your product? Upper Threading How-to information about upper threading. Bobbin (Winding/Installing) How-to information about winding or installing bobbin. Before Embroidering How-to information about preparation for sewing. How to use (Video FAQs) Video instructions for preparation for sewing. FAQs & Troubleshooting