Brother NC21SE - Manual (Page 61)

APPENDIX —————————————————————————————————————————————————————
60
The upper
thread breaks.
You have not inserted the needle
properly.
Insert the needle properly. page 21
The area around the hole in the nee-
dle plate is scratched.
Replace the needle plate.
Contact your retailer or the nearest
authorised service center.
–
The area around the hole in the
presser foot is scratched.
Replace the presser foot.
Contact your retailer or the nearest
authorised service center.
–
The bobbin case is scratched, or has
a burr on it.
Replace the bobbin case.
Contact your retailer or the nearest
authorised service center.
–
You have not used a bobbin that has
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 11
The lower
thread is tangled
or breaks.
You have not wound the bobbin
thread properly.
Wind the bobbin thread properly. page 11
The bobbin is scratched or does not
turn smoothly.
Replace the bobbin. –
The thread is tangled.
Remove the tangled thread and
clean the bobbin case.
page 57
You have not used a bobbin that has
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 11
Bobbin is set incorrectly. Reset the bobbin thread correctly. page 14, 15
The thread ten-
sion is incorrect.
You have not threaded the upper
thread properly.
Correct the upper threading. page 16
You have not wound the bobbin
thread properly.
Wind the bobbin thread properly. page 11
You have not threaded the right
combination of thread and needle
for the fabric you are using.
Choose a thread and needle that are
appropriate for the type of fabric.
page 20
You have not attached the presser-
foot holder properly.
Attach the presser-foot holder prop-
erly.
page 25
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 29
You have not used a bobbin that has
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 11
Bobbin is set incorrectly. Reset the bobbin thread correctly. page 14, 15
The fabric is
wrinkled.
You have not threaded the upper
thread properly or fitted the bobbin
properly.
Thread the upper thread and wind
the bobbin thread properly.
page 14, 15, 16
You have not fitted the spool prop-
erly.
Fit the spool properly. –
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.
page 20
The needle is bent or blunt. Replace the needle. page 21
If you are sewing thin fabric, the
stitch is too thick.
Sew with stabiliser material under
the fabric.
page 31
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 29
Symptom Possible cause How to put it right Reference