Unicorn LS2-H520 - Page 32

  
TROUBLESHOOTING GUIDE
Problem Cause Check Solution Page
Needle thread
slack.



  
  

  


  
  

Bobbin thr ead
slack.
  


  
  




   
  

Improper looping
stitch tightening
 

 
   
   
  
  
   


  

   
   

Improper thread
cutt ing
a. Needle,
bobbin
thre ads not
cut
b. Nee dle
thre ad
not cut
c. Bobbin
thre ad
not cut


 
   
    
  


  


  
  
  
 
  

      

   
   




  



    
   
 
     


    