Brother SQ9050 Operation Manual page 75

Symptom
You have not inserted the needle
properly.
The area around the hole in the nee-
dle plate is scratched.
The area around the hole in the
The upper
presser foot is scratched.
thread breaks.
The bobbin case is scratched, or has
a burr on it.
You have not used a bobbin that has
been designed for this machine.
You have not wound the bobbin
thread properly.
The bobbin is scratched or does not
turn smoothly.
The lower
The thread is tangled.
thread is tangled
or breaks.
You have not used a bobbin that has
been designed for this machine.
Bobbin is set incorrectly.
The thread is
tangled on the The upper thread was not threaded
wrong side of correctly.
the fabric.
You have not threaded the upper
thread properly.
You have not wound the bobbin
thread properly.
You have not threaded the right
combination of thread and needle
for the fabric you are using.
The thread
You have not attached the presser
tension is
foot holder properly.
incorrect.
The thread tension is incorrect.
You have not used a bobbin that has
been designed for this machine.
Bobbin is set incorrectly.
The upper
The bobbin thread is incorrectly
thread is too
installed.
tight.
You have not threaded the upper thread
properly or fitted the bobbin properly.
You have not fitted the spool properly. Fit the spool properly.
The fabric is
wrinkled.
You have not used the right combina-
tion of fabric, thread and needle.
The needle is bent or blunt.
Possible cause How to put it right
Insert the needle properly.
Replace the needle plate.
Contact your retailer or the nearest
authorized service center.
Replace the presser foot.
Contact your retailer or the nearest
authorized service center.
Replace the bobbin case.
Contact your retailer or the nearest
authorized service center.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Wind the bobbin thread properly.
Replace the bobbin.
Remove the tangled thread and
clean the bobbin case.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Reset the bobbin thread correctly.
Correct the upper threading.
Correct the upper threading.
Wind the bobbin thread properly.
Choose a thread and needle that are
appropriate for the type of fabric.
Attach the presser foot holder
properly.
Adjust the tension of the upper
thread.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Reset the bobbin thread correctly.
Correctly install the bobbin thread.
Thread the upper thread and wind
the bobbin thread properly.
Choose a thread and needle that are
appropriate for the type of fabric.
Replace the needle.
Reference
page 22
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page 12
page 12
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4
page 70
page 12
page 15, 16
page 17
page 17
page 12
page 21
page 26
page 31
page 12
page 15, 16
page 15
page 15, 16, 17
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page 21
page 22
73