Brother SQ9050 Operation Manual page 76

APPENDIX —————————————————————————————————————————————————————
Symptom
If you are sewing thin fabric, the
The fabric is
stitch is too thick.
wrinkled.
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.
Stitches are
skipped. 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.
There is a high-
pitched noise
The bobbin case is scratched.
while sewing.
You have not used bobbin that has
been designed for this machine.
You have not moved the needle
The needle
holder to its highest position.
threader can not
be used.
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 stitch is not
sewn correctly.
The thread is tangled, for example,
in the bobbin case.
The stitch adjustment level is
incorrect.
The feed dogs are lowered.
The stitch is too fine.
You have not used the right combi-
The fabric does
nation of fabric, thread and needle.
not feed.
The thread is tangled, for example,
in the bobbin case.
The sewing light
bulb does not The sewing lamp is damaged.
come on.
74
Possible cause How to put it right
Sew with stabilizer 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 tangled thread. If the
thread is tangled in the bobbin case,
clean the bobbin case.
Adjust the stitch.
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 34
page 31
page 17
page 21
page 22
page 70
page 70
page 17
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page 12
page 17
page 22
page 35
page 31
page 70
page 68
. page 49, 56
page 28
page 21
page 70
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