Brother International NX-450Q Users Manual - English - Page 145

Troubleshooting

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APPENDIX Troubleshooting If the machine stops operating correctly, check the following possible problems before requesting service. If the problem persists, contact your dealer or the nearest authorized service center. Symptom Probable Cause Remedy The machine is not turned on. Turn on the machine. The sewing machine does not operate. The "Start/Stop" button was not pressed. Press the "Start/Stop" button. The presser foot lever is raised. Lower the presser foot lever. The "Start/Stop" button was pressed, even though the foot controller is connected. Do not use the "Start/Stop" button when the foot controller is connected. To use the "Start/ Stop" button, disconnect the foot controller. The needle is incorrectly installed. Correctly install the needle. The needle clamp screw is loose. Use the screwdriver to firmly tighten the screw. The needle is bent or blunt. Replace the needle. The combination of fabric, thread and needle is not correct. Select a thread and needle that are appropriate for the type of fabric being sewn. 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 you wish to sew. that you wish to sew. The upper thread tension is too tight. Loosen the upper thread tension. The fabric is pulled too much. The needle breaks. The spool is incorrectly installed. Lightly guide the fabric. Correctly install the spool. The area around the hole in the needle plate is scratched, or has a burr on it. Replace the needle plate. Contact your dealer or the nearest authorized service center. The area around the hole in the presser foot is scratched, or has a burr on it. Replace the presser foot. Contact your dealer or the nearest authorized service center. 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. Reference page 17 page 52 - page 52 page 39 page 38 page 134 page 57 - page 28 - - - page 22 144

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APPENDIX
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144
Troubleshooting
If the machine stops operating correctly, check the following possible problems before requesting service.
If the problem persists, contact your dealer or the nearest authorized service center.
Symptom
Probable Cause
Remedy
Reference
The sewing
machine does not
operate.
The machine is not turned on.
Turn on the machine.
page 17
The “Start/Stop” button was not
pressed.
Press the “Start/Stop” button.
page 52
The presser foot lever is raised.
Lower the presser foot lever.
–
The “Start/Stop” button was pressed,
even though the foot controller is
connected.
Do not use the “Start/Stop” button
when the foot controller is
connected. To use the “Start/
Stop” button, disconnect the foot
controller.
page 52
The needle breaks.
The needle is incorrectly installed.
Correctly install the needle.
page 39
The needle clamp screw is loose.
Use the screwdriver to firmly
tighten the screw.
The needle is bent or blunt.
Replace the needle.
The combination of fabric, thread
and needle is not correct.
Select a thread and needle that
are appropriate for the type of
fabric being sewn.
page 38
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 upper thread tension is too tight.
Loosen the upper thread tension.
page 57
The fabric is pulled too much.
Lightly guide the fabric.
–
The spool is incorrectly installed.
Correctly install the spool.
page 28
The area around the hole in the
needle plate is scratched, or has a
burr on it.
Replace the needle plate. Contact
your dealer or the nearest
authorized service center.
–
The area around the hole in the
presser foot is scratched, or has a
burr on it.
Replace the presser foot. Contact
your dealer or the nearest
authorized service center.
–
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