SB7900E FAQs & Troubleshooting SB7900E Not your product? Sort by Updated Date Popularity 4 Results 1. 12/12/2018 It is difficult to pass the thread through the needle bar thread guide(hook). 2. 12/12/2018 Upper threading (Point) 3. 01/24/2014 Upper Threading (Threading the upper thread) 4. 04/07/2009 Place a spool of thread on a spool pin. Getting Ready FAQs & Troubleshooting