
Revised 10/2004
S-4000 LT
2-3
TROUBLESHOOTING
e-mail. [email protected]; [email protected]; website: www.amfreece.com
Phones: +420 582 309 146 (Service), +420 582 309 286 (Spare Parts); Fax: +420 582 360 606
SYMPTOM
POSSIBLE CAUSE
PROBABLE SOLUTION
Stitch skip at the beginning
of sewing
Stitch skip during sewing
Needle, looper, throat plate
damaged
Needle thread end is too short
Incorrectly adjusted needle bar
height
Incorrectly adjusted clearance
between needle and throat
plate
Incorrect loopers timing
Needle, looper, throat plate
damaged
Incorrectly adjusted needle bar
height
Incorrectly adjusted clearance
between needle and throat
plate
Incorrect loopers timing
Incorrect thread tension
adjustment
Incorrect threading
Thread loops are too small
Change damaged parts
See section E13, point 2
See section E4
See section E5
See section E12
Change damaged parts
See section E4
See section E5
See section E12
Adjust the tension correctly
See section C3
See section E13 point 3