Întrebări frecvente şi depanare

Check the following points or issues.

• Lint may be wound in the hook.
  Clean the hook.
   
• The upper thread is not threaded correctly.
  Check the thread path, and then thread the upper thread again.
   
• The hook is damaged.
  Replace the hook. Consult your nearest authorized Brother dealer.
   
• Not enough oil was applied.
  Oil recommended parts.