Troubleshooting - Brother JA1450NT Operation Manual

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —

TROUBLESHOOTING

If the machine stops operating correctly, check the following possible problems before requesting service. You can
solve most problems by yourself. If you need additional help, the Brother Solutions Center offers the latest FAQs and
troubleshooting tips. Visit us at " http://support.brother.com ". If the problem persists, contact your Brother dealer or
the nearest authorized Brother Service Center.
Symptom
The sewing
machine does
not work.
Fabric being
sewn with the
machine
cannot be
removed.
The needle
breaks.
The upper
thread
breaks.
▼
Possible cause
The main power switch is turned off.
The bobbin-winder shaft is pushed to the
right.
You have not used the foot controller
properly.
Thread is tangled below the needle plate.
The needle is incorrectly installed.
The needle clamp screw is loose.
The needle is bent or blunt.
The upper thread was not threaded
correctly.
You have not used the right combination of
fabric, thread and needle.
The presser foot you are using is not
appropriate for the type of stitch that you
want to sew.
The upper thread tension is too tight.
You are pulling the fabric too much.
You have not fitted the spool properly.
The area around the hole in the needle
plate or the presser foot is scratched.
The bobbin case is scratched.
You have not used a bobbin that has been
designed for this machine.
You have not threaded the upper thread
properly. (For example, you have not fitted
the spool properly, or the thread has come
out of the guide above the needle.)
There are knots or tangles in the thread.
The needle is not appropriate for the thread
you are using.
The upper thread tension is too tight.
How to put it right
Turn on the main power switch.
Move the bobbin-winder shaft to the
left.
Use the foot controller properly.
Lift up the fabric and cut the threads
below it, and clean the race.
Correctly install the needle.
Use the screwdriver to firmly tighten
the screw.
Replace the needle.
Correct the upper threading.
Choose a thread and needle that are
appropriate for the type of fabric.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
Loosen the upper thread tension.
Lightly guide the fabric.
Fit the spool properly.
Replace the needle plate.
Contact your retailer or the nearest
authorized Brother Service Center.
Replace the bobbin case.
Contact your retailer or the nearest
authorized Brother Service Center.
Use a bobbin that has been designed
for this machine.
Correct the upper threading.
Remove any knots or tangles.
Choose a needle that is appropriate for
the type of stitch.
Loosen the upper thread tension.
Page
8
14
8
40
8
9
8
17
22
–
27
–
6
17
–
–
13
17
–
22
27
42