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29
Symptom, Cause/solution
Reference
The needle is not appropriate for the thread
you are using�
12
The upper thread tension is too tight� 17
The thread is tangled, for example, in the
bobbin case�
27
The needle is turned, bent or the point is dull� 13
The needle is not installed properly� 13
The area around the opening in the needle
plate is scratched�
This is not a scratch�
*
The area around the opening in the presser
foot is scratched�
*
The bobbin case is scratched, or has a burr on it�
*
A bobbin designed for this machine is not
used�
7
The bobbin thread is tangled or breaks�
The bobbin thread is wound improperly� 7
The bobbin is scratched or does not turn
smoothly�
7
The thread is tangled� 25
A bobbin designed for this machine is not
used�
7
The bobbin is installed incorrectly� 9
The thread tension is incorrect�
Upper threading is incorrect� 9
The bobbin thread is wound improperly� 7
The needle or thread is improper for the fabric� 12
The presser foot is not attached properly� 15
The presser foot holder is not attached
properly�
15
The thread tension is incorrect� 17
A bobbin designed for this machine is not
used�
7
The bobbin is installed incorrectly� 9
The fabric is wrinkled�
Upper threading or the bobbin installation is
incorrect�
7, 9
The spool is not fitted properly� 7
The needle or thread is improper for the fabric� 12
The needle is turned, bent or the point is dull� 13
If you are sewing thin fabric, the stitch is too
thick�
X
Sew with stabilizer material under the
fabric�
-
The thread tension is incorrect� 17
Stitches are skipped�
Upper threading is incorrect� 9
The needle or thread is improper for the fabric� 12
Symptom, Cause/solution
Reference
The needle is turned, bent or the point is dull� 13
The needle is not installed properly� 13
Dust has accumulated under the needle plate
or in the bobbin case�
24
The thread is tangled on the wrong side of the fabric�
Upper threading is incorrect� 9
The needle or thread is improper for the fabric� 12
There is a high-pitched noise while sewing�
Dust has built up in the feed dogs or in the
bobbin case�
24
Upper threading is incorrect� 9
The bobbin case is scratched� *
A bobbin designed for this machine is not
used�
7
The needle threader cannot be used�
★
The needle is not in the highest position� 10
The needle is installed incorrectly� 13
The needle is turned, bent or the point is dull� 13
Upper threading is incorrect� 9
The needle threader hook is bent and does not
pass through the eye of the needle�
*
The needle threader lever cannot be moved or
returned to its original position�
*
A size 65/9 needle is being used�
X
The needle is incompatible with the needle
threader� Manually pass the thread through
the eye of the needle�
10
The stitch is not sewn correctly�
The presser foot is not appropriate for the
selected stitch�
14
The thread tension is incorrect� 17
The thread is tangled, for example, in the
bobbin case�
27
The fabric does not feed�
The feed dogs are lowered�
★
X
Slide the feed dog position switch to �
21
The stitch is too fine� 15
The needle or thread is improper for the fabric� 12
The thread is tangled, for example, in the
bobbin case�
27
While winding the bobbin, the bobbin thread was
wound below the bobbin winder seat�
★
The thread was incorrectly passed under the
pretension disk on the thread guide�
X
Remove any entangled thread, and then
wind the bobbin�
8, 28
The bobbin thread cannot be pulled up�
The needle is turned, bent or the point is dull� 13
The bobbin is installed incorrectly� 9
★: Only for some models�
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