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Brother NV10 Operation Manual Page 86

Computerized sewing machine.
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Symptom
The upper thread is incorrectly
installed.
The bobbin thread is incorrectly
installed.
The bobbin thread is incorrectly
wound.
The combination of fabric, thread and
needle is incorrect.
The thread ten-
sion is incorrect.
The presser foot holder is incorrectly
installed.
The thread tension is incorrectly set.
A bobbin designed specifically for
this machine is not used.
The upper thread or bobbin thread is
incorrectly installed.
The spool is incorrectly installed.
The combination of fabric, thread and
needle is incorrect.
The fabric is
puckered.
The needle is bent or blunt.
If thin fabrics are being sewn, the
stitch is too long or the fabric is not
being fed correctly.
The thread tension is incorrectly set.
The upper thread is incorrectly
installed.
The combination of fabric, thread and
needle is incorrect.
Stitches are
skipped.
The needle is bent or blunt.
The needle is incorrectly installed.
Dust has accumulated under the
needle plate or in the bobbin case.
Dust has accumulated in the feed
dogs or in the bobbin case.
The upper thread is incorrectly
A high-pitched
installed.
sound is pro-
duced while sew-
The bobbin case is scratched.
ing.
A rattling noise is
produced.
A bobbin designed specifically for
this machine is not used.
Probable Cause
Remedy
Correct the upper threading.
Correct the bobbin threading.
Correctly wind the bobbin.
Select a thread and needle that are
appropriate for the type of fabric
being sewn.
Correctly install the presser foot
holder.
Adjust the thread tension.
Bobbins from older models, which
have a different thickness, will not
work properly. Only use a bobbin
designed specifically for this
machine.
Correctly thread the upper thread and
correctly install the bobbin thread.
Correctly install the spool.
Select a thread and needle that are
appropriate for the type of fabric
being sewn.
Replace the needle with a new one.
Sew with stabilizer material under the
fabric.
Adjust the thread tension.
Correct the upper threading.
Select a thread and needle that are
appropriate for the type of fabric
being sewn.
Replace the needle with a new one.
Correctly install the needle.
Remove the needle plate cover and
clean the bobbin case.
Clean the bobbin case.
Correct the upper threading.
Replace the bobbin case.
Contact your dealer or the nearest
authorized service center.
Bobbins from older models, which
have a different thickness, will not
work properly. Only use a bobbin
designed specifically for this
machine.
Reference
page 20
page 18
page 15
page 28
page 33
page 47
page 15
page 18,
20
4
page 15
page 28
page 29
page 49
page 47
page 20
page 28
page 29
page 29
page 81
page 81
page 20
page 15
85

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