PR-650/650C FAQs & Troubleshooting PR-650/650C Not your product? Sort by Updated Date Popularity 4 Results 1. 08/01/2017 How do I thread the machine? (Threading the upper thread) 2. 10/16/2015 Place a spool of thread on a spool pin 3. 06/16/2014 How do I thread the needle. [Video instructions] 4. 06/16/2014 How do I thread my machine (Threading the upper thread). [Video instructions] Getting Ready FAQs & Troubleshooting