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APPENDIX
101
4
The area around the hole in the needle plate is
damaged.
1
Scratches/Burrs
• Replace the needle plate.
*
The needle hits/touches the needle plate.
1
Needle
2
Hole in needle plate
3
Needle hits hole
• Replace the needle.
96
*
The presser foot is set too high and not correctly
positioned.
The needle hits/touches the presser foot.
*
The area around the presser foot hole is
damaged.
1
Scratches/Burrs
• Replace the presser foot.
*
Sliding surface on hook race is not smooth. There
are scratches or burrs on it.
1
Hook race area
*
The bobbin or bobbin case is not correctly
installed.
25, 30
The hook is not correctly installed.
*
Symptom
Probable Cause/Remedy
Page
The needle breaks.
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.
• 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.
64
The upper thread tension is set too high.
84
A bobbin designed specifically for this machine is
not used.
25
The needle and the hook are not correctly
passing each other.
• Hook timing may be OFF.
*
The thread density of the embroidery data is too
fine.
Three or more overlapping stitches are being
embroidered.
• Using a data design system, correct the thread
density and overstitching settings in the
embroidery data.
109
The thread is not cut automatically.
Lint or dust has accumulated around the needle
plate (moving knife, fixed knife or thread retaining
plate).
94
A bobbin case designed specifically for this
machine is not used.
• Use the correct bobbin case.
—
Lint or dust has accumulated in the thread
tension disc.
96
After the threads are automatically cut, the upper
thread is too short and comes out of the needle.
Lint or dust has accumulated around the needle
plate (moving knife, fixed knife or thread retaining
plate).
94
Symptom
Probable Cause/Remedy
Page