Brother International NX-450Q Users Manual - English - Page 148

sewn correctly.

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Page 148 highlights

Symptom Probable Cause Remedy Reference Dust has accumulated in the feed dogs or in the bobbin case. Clean the race. page 142 A high-pitched noise is made while sewing. The upper thread was not threaded correctly. The bobbin case is scratched, or has a burr on it. Correct the upper threading. Replace the bobbin case. Contact your dealer or the nearest authorized service center. page 28 - 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. page 22 The needle threader cannot be used. The needle has not been raised to the correct position. The needle is incorrectly installed. Press the "Needle Position" button. Correctly install the needle. page 31 page 39 The presser foot that is used is not Attach the presser foot that is appropriate for the type of stitch that appropriate for the type of stitch page 134 you wish to sew. that you wish to sew. The stitch is not sewn correctly. The thread tension is incorrect. Adjust the tension of the upper thread. page 57 4 The thread is tangled, for example, in the bobbin case. Remove the tangle thread. If the thread is tangled in the bobbin case, clean the race. page 142 The feed dogs are lowered. Slide the drop feed lever to the right. (as seen from the rear of the machine) page 104 The stitch is too short. Lengthen the stitch length. page 59 The fabric does not feed. The presser foot that is used is not appropriate for the type of stitch that you wish to sew. The pressure of the presser foot is weak. Attach the presser foot that is appropriate for the type of stitch that you wish to sew. Turn the presser foot pressure dial to the left to increase the pressure of the presser foot. page 134 page 43 The thread is tangled, for example, in the bobbin case. Remove the tangle thread. If the thread is tangled in the bobbin case, clean the race. page 142 The sewing lamp does not come on. The sewing lamp is damaged. Contact your dealer or the nearest authorized service center. - Nothing appears in The brightness of the LCD is either the LCD. too light or too dark. Adjust the brightness of the LCD. page 149 Troubleshooting 147

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Troubleshooting
147
— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
4
A high-pitched
noise is made while
sewing.
Dust has accumulated in the feed
dogs or in the bobbin case.
Clean the race.
page 142
The upper thread was not threaded
correctly.
Correct the upper threading.
page 28
The bobbin case is scratched, or has
a burr on it.
Replace the bobbin case. Contact
your dealer or the nearest
authorized service center.
–
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.
page 22
The needle threader
cannot be used.
The needle has not been raised to the
correct position.
Press the “Needle Position”
button.
page 31
The needle is incorrectly installed.
Correctly install the needle.
page 39
The stitch is not
sewn correctly.
The presser foot that is used is not
appropriate for the type of stitch that
you wish to sew.
Attach the presser foot that is
appropriate for the type of stitch
that you wish to sew.
page 134
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 57
The thread is tangled, for example, in
the bobbin case.
Remove the tangle thread. If the
thread is tangled in the bobbin
case, clean the race.
page 142
The fabric does not
feed.
The feed dogs are lowered.
Slide the drop feed lever to the
right. (as seen from the rear of the
machine)
page 104
The stitch is too short.
Lengthen the stitch length.
page 59
The presser foot that is used is not
appropriate for the type of stitch that
you wish to sew.
Attach the presser foot that is
appropriate for the type of stitch
that you wish to sew.
page 134
The pressure of the presser foot is
weak.
Turn the presser foot pressure dial
to the left to increase the pressure
of the presser foot.
page 43
The thread is tangled, for example, in
the bobbin case.
Remove the tangle thread. If the
thread is tangled in the bobbin
case, clean the race.
page 142
The sewing lamp
does not come on.
The sewing lamp is damaged.
Contact your dealer or the nearest
authorized service center.
–
Nothing appears in
the LCD.
The brightness of the LCD is either
too light or too dark.
Adjust the brightness of the LCD.
page 149
Symptom
Probable Cause
Remedy
Reference