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Troubleshooting
Appendix A-17
MAINTENANCE AND TROUBLESHOOTING
A
Needle breaks.
Stitch length is too short. Adjust the stitch length. B-38
Bobbin thread is incorrectly wound. Use a correctly wound bobbin. B-13
Upper thread
breaks.
Machine is not threaded correctly (used the
wrong spool cap, spool cap is loose, the thread
did not catch the needle bar threader, etc.).
Rethread the machine correctly. B-19
Knotted or tangled thread is being used. Remove any knots or tangles. –
The selected needle is not appropriate for the
thread being used.
Select a needle that is appropriate for the type
of thread being used.
B-26
Upper thread tension is too tight. Adjust the thread tension. B-39
Thread is tangled. Use scissors, etc., to cut the tangled thread and
remove it from the race, etc.
A-6
Needle is turned, bent or the point is dull. Replace the needle. B-27
Needle is installed incorrectly. Reinstall the needle correctly. B-27
There are scratches around the opening in the
needle plate.
* There is a notch on the left side of the
opening in the needle plate. This is not a
scratch.
1 Notch
Replace the needle plate, or consult your
authorized Brother dealer.
A-8
There are scratches around the opening in the
presser foot.
Replace the presser foot, or consult your
authorized Brother dealer.
B-29
There are scratches on the bobbin case. Replace the bobbin case, or consult your
authorized Brother dealer.
A-2
Using improper needle or thread for the
selected fabric.
Check the “Fabric/Thread/Needle
Combinations” chart.
B-26
While sewing, the thread became knotted or
tangled.
Rethread upper and lower thread. B-13, B-19
A bobbin designed specifically for this machine
is not used.
Incorrect bobbins will not work properly. Only
use a bobbin designed specifically for this
machine.
B-13
The thread is
tangled on the
wrong side of the
fabric.
Upper threading is incorrect. Check the steps for threading the machine and
rethread the machine.
Be sure that the presser foot is in the raised
position when threading the machine so that the
upper thread sets properly in the upper tension.
B-19, A-6
Using improper needle or thread for the
selected fabric.
Check the “Fabric/Thread/Needle
Combinations” chart.
B-26
The upper thread is
too tight.
The bobbin thread is incorrectly installed. Correctly install the bobbin thread. B-16, A-5
Symptom Probable Cause Remedy Reference
a
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