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Brother NV10 Operation Manual Page 85

Computerized sewing machine.
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APPENDIX — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Symptom
The upper thread was incorrectly
threaded (for example, the spool is
incorrectly installed or the thread has
come out of the needle bar thread
guide).
There are knots or tangles in the
thread.
The selected needle is not
appropriate for the thread being used.
The upper thread tension is too tight. Loosen the upper thread tension.
The thread is tangled, for example, in
the bobbin case.
The needle is bent or blunt.
The upper thread
breaks.
The needle is incorrectly installed.
The area around the hole in the
needle plate is scratched.
The area around the hole in the
presser foot is scratched.
The bobbin case is scratched.
A bobbin designed specifically for
this machine is not used.
The bobbin thread is incorrectly
installed.
The bobbin thread is incorrectly
wound.
There are scratches on the bobbin or
The lower thread
it doesn't rotate properly.
is tangled or
breaks.
The thread is tangled.
A bobbin designed specifically for
this machine is not used.
84
Probable Cause
Remedy
Correct the upper threading.
Remove any knots or tangles.
Select a needle that is appropriate for
the type of stitch being used.
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the race.
Replace the needle with a new one.
Correctly install the needle.
Replace the needle plate.
Contact your dealer or the nearest
authorized service center.
Replace the presser foot.
Contact your dealer or the nearest
authorized service center.
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.
Correct the bobbin threading.
Correctly wind the bobbin.
Replace the bobbin.
Remove the tangled thread and clean
the race.
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 28
page 47
page 81
page 29
page 29
page 15
page 18
page 15
page 81
page 15

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