Brother Computerized Embroidery Machine Operation Manual page 76

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Symptom
The upper thread
breaks.
Bobbin thread
does not wind
neatly on the
bobbin.
The lower thread
is tangled or
breaks.
The thread tension
is incorrect.
Probable Cause
The thread is tangled, for example,
in the bobbin case.
The needle is bent or blunt.
The needle is incorrectly installed. Correctly install the needle.
The area around the hole in the
needle plate is scratched, or has a
burr on it.
The area around the hole in the
embroidery foot is scratched, or
has a burr on it.
The bobbin case is scratched, or
has a burr on it.
A bobbin designed specifically for
this machine is not used.
The thread that was pulled out
was not wound onto the bobbin
correctly.
The bobbin thread is incorrectly
installed.
The bobbin is scratched or does
not rotate smoothly, or has a burr
on it.
The thread is tangled.
A bobbin designed specifically for
this machine is not used.
The upper thread was not
threaded correctly.
The bobbin thread is incorrectly
installed.
The thread tension is incorrect.
A bobbin designed specifically for
this machine is not used.
Remedy
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the race.
Replace the needle.
Replace the needle plate. Contact
your retailer or the nearest authorized
service center.
Replace the embroidery 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
designed specifically for this
machine.
Wind the thread that was pulled off
around the bobbin five or six times
clockwise.
Correctly install the bobbin thread.
Replace the bobbin.
Remove the tangled thread and clean
the race.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
Correct the upper threading.
Correctly install the bobbin thread.
Adjust the tension of the upper
thread.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
Reference
page 70
page 35
–
–
–
page 24
page 26
page 28
–
page 70
page 24
page 30
page 28
page 64
page 24
Troubleshooting 75
3