Probable Cause; Reference Page- Page 256

APPENDIX 

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254

The needle 

breaks.

The area around the embroidery 

foot hole is damaged.

1

Scratches or Burrs

Replace the presser foot.

Consult your nearest 

authorized dealer.

Sliding surface on hook race is 

not smooth. There are scratches 

or burrs on it.

1

Hook race area

Consult your nearest 

authorized dealer.

The bobbin or bobbin case are 

not correctly installed.

Remove and reinstall bobbin 

and bobbin case.

p.36, 37

The hook is not correctly 

installed.

Consult your nearest 

authorized dealer.

The hook stopper is not 

correctly installed, the hook is 

making a complete rotation.

Consult your nearest 

authorized dealer.

The upper thread is not 

threaded correctly.

The upper thread is catching 

somewhere.

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.

p.55-58

The upper thread tension is set 

too high. It does not run.

Decrease the upper thread 

tension and make sure tension 

disc rotates when pulling on 

thread.

p.113

A bobbin designed specifically 

for this machine is not used.

Use the correct bobbin.

p.33

The needle and the hook are not 

correctly passing each other.

Hook timing may be OFF. 

Consult your nearest 

authorized dealer.

There is backlash play (forward/

backward) in the needle bar 

case.

Consult your nearest 

authorized dealer.

The thread density of the 

embroidery data is too fine.

Three or more overlapping 

stitches are being sewn.

Using a data design system, 

correct the thread density and 

overstitching settings in the 

embroidery data.

p.136

Symptom

Probable Cause

Remedy

Reference Page