Brother International BM3700 Users Manual - English and Spanish - Page 48

Troubleshooting

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APPENDIX 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://solutions.brother.com ". If the problem persists, contact your dealer or the nearest authorized 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 oval 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 service center. Replace the bobbin case. Contact your retailer or the nearest authorized 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 7 14 7 45 7 8 7 17 22 - 27 - 18, 25 - - 13 17 - 22 27 47

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APPENDIX
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47
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://solutions.brother.com ”. If the problem persists, contact your dealer or the
nearest authorized service center.
Symptom
Possible cause
How to put it right
Page
The sewing
machine does
not work.
The main power switch is turned off.
Turn on the main power switch.
7
The bobbin-winder shaft is pushed to the
right.
Move the bobbin-winder shaft to the
left.
14
You have not used the foot controller
properly.
Use the foot controller properly.
7
Fabric being
sewn with the
machine
cannot be
removed.
Thread is tangled below the needle plate.
Lift up the fabric and cut the threads
below it, and clean the race.
45
The needle
breaks.
The needle is incorrectly installed.
Correctly install the needle.
7
The needle clamp screw is loose.
Use the oval screwdriver to firmly
tighten the screw.
8
The needle is bent or blunt.
Replace the needle.
7
The upper thread was not threaded
correctly.
Correct the upper threading.
17
You have not used the right combination of
fabric, thread and needle.
Choose a thread and needle that are
appropriate for the type of fabric.
22
The presser foot you are using is not
appropriate for the type of stitch that you
want to sew.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
–
The upper thread tension is too tight.
Loosen the upper thread tension.
27
You are pulling the fabric too much.
Lightly guide the fabric.
–
You have not fitted the spool properly.
Fit the spool properly.
18, 25
The area around the hole in the needle
plate or the presser foot is scratched.
Replace the needle plate.
Contact your retailer or the nearest
authorized service center.
–
The bobbin case is scratched.
Replace the bobbin case.
Contact your retailer or the nearest
authorized service center.
–
You have not used a bobbin that has been
designed for this machine.
Use a bobbin that has been designed
for this machine.
13
The upper
thread
breaks.
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.)
Correct the upper threading.
17
There are knots or tangles in the thread.
Remove any knots or tangles.
–
The needle is not appropriate for the thread
you are using.
Choose a needle that is appropriate for
the type of stitch.
22
The upper-thread tension is too tight.
Loosen the upper thread tension.
27