Brother International PR-620 Users Manual - English - Page 217

APPENDIX Symptom Probable Cause The area around the embroidery foot hole is damaged. Remedy Reference Page Replace the presser foot. 1 Consult your nearest authorized dealer. 1 Scratches or Burrs Sliding surface on hook race is not smooth. There are scratches or burrs on it. 1 Consult your nearest authorized dealer. The needle breaks. 1 Hook race area The hook is not correctly installed. The hook stopper is not correctly installed, the hook is making a complete rotation. The upper thread is not threaded correctly. The upper thread is catching somewhere. The upper thread tension is set too high. It does not run. A bobbin designed specifically for this machine is not used. The needle and the hook are not correctly passing each other. There is backlash play (forward/ backward) in the needle bar case. The thread density of the embroidery data is too fine. Three or more overlapping stitches are being sewn. Consult your nearest authorized dealer. Consult your nearest authorized dealer. Pull the upper thread by hand from below the presser foot, and check that the thread moves smoothly. If the thread does not move, it is not threaded correctly. Thread the upper thread correctly. Make sure the thread is caught by the needle bar thread guide. Decrease the upper thread tension and make sure tension disc rotate when pulling on thread. Use the correct bobbin. Hook timing may be OFF. Consult your nearest authorized dealer. Consult your nearest authorized dealer. Using a data design system, correct the thread density and overstitching settings in the embroidery data. p.35-38 p.86 p.15 p.100 200