Brother Simplicity SB700T Operation Manual page 67

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Symptom
The fabric is
wrinkled.
Stitches are
skipped.
There is a high-
pitched noise
while sewing.
The needle
threader can not
be used.
The stitch is not
sewn correctly.
The fabric does
not feed.
The sewing light
bulb does not
come on.
Possible cause
You have not threaded the upper thread
properly or fitted the bobbin properly.
You have not fitted the spool properly. Fit the spool properly.
You have not used the right combina-
tion of fabric, thread and needle.
The needle is bent or blunt.
If you are sewing thin fabric, the
stitch is too thick.
The thread tension is incorrect.
You have not threaded the upper
thread properly.
You have not used the right combi-
nation of fabric, thread and needle.
The needle is bent or blunt.
You have not inserted the needle properly.
Dust has accumulated under the
needle plate or in the bobbin case.
Dust has built up in the feed dogs or
in the bobbin case.
You have not threaded the upper
thread properly.
The bobbin case is scratched.
You have not used bobbin that has
been designed for this machine.
You have not moved the needle
holder to its highest position.
You have not inserted the needle properly.
The presser foot that you are using is
not correct for the type of stitch.
The thread tension is incorrect.
The thread is tangled, for example,
in the bobbin case.
The feed dogs are lowered.
The stitch is too fine.
You have not used the right combi-
nation of fabric, thread and needle.
The thread is tangled, for example,
in the bobbin case.
The sewing lamp is damaged.
How to put it right
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.
Sew with stabiliser material under
the fabric.
Adjust the tension of the upper thread.
Correct the upper threading.
Choose a thread and needle that are
appropriate for the type of fabric.
Replace the needle.
Insert the needle properly.
Remove the needle plate cover and
clean the plate and the bobbin case.
Clean the bobbin case.
Correct the upper threading.
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.
Raise the needle either by turning the
handwheel toward you
(counterclockwise) so that the mark on
the wheel points up or by pressing
(needle position button) once or twice.
Insert the needle properly.
Attach the presser foot that is correct for
the type of stitch that you want to sew.
Adjust the tension of the upper
thread.
Remove the tangle thread. If the
thread is tangled in the bobbin case,
clean the bobbin case.
Slide the feed dog position lever to
Lengthen the stitch length.
Choose a thread and needle that are
appropriate for the type of fabric.
Remove the tangle thread. If the
thread is tangled in the bobbin case,
clean the bobbin case.
Contact your retailer or the nearest
authorized service center.
Reference
page 14, 15, 16
–
page 20
page 21
page 33
page 29
page 16
page 20
page 21
page 61
4
page 61
page 16
–
page 11
page 16
page 21
page 56
page 29
page 61
. page 42, 49
page 27
page 20
page 61
–
65