Brother CE7070PRW Operation Manual page 96

APPENDIX — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Symptom
The upper thread was not threaded
correctly (for example, the spool is
not installed correctly, the spool cap
is too big for the spool being used, or
the thread has come out of the
needle bar thread guide.)
There are knots or tangles in the
thread.
The needle is not appropriate for the
thread you are using.
The upper thread tension is too tight. Loosen the upper thread tension.
The thread is tangled, for example,
in the race.
The upper
thread breaks.
The needle is bent or blunt.
The needle is incorrectly installed.
The area around the hole in the
needle plate is scratched.
The area around the hole in the
presser foot is scratched.
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
thread is tangled The thread is tangled.
or breaks.
You have not used a bobbin that has
been designed for this machine.
Bobbin is set incorrectly.
You have not threaded the upper thread
properly or fitted the bobbin properly.
The spool or spool cap is incorrectly
installed.
You have not used the right
combination of fabric, thread and
The fabric is
needle.
wrinkled.
The needle is bent or blunt.
If thin fabrics are being sewn, the
stitch is too long or the fabric is not
being fed correctly.
If thin fabrics are being sewn, the
stitch is too coarse.
94
Possible cause How to put it right
Correct the upper threading. Use the
spool cap that best fits the size of the
spool being used.
Remove any knots or tangles.
Choose a needle that is appropriate
for the type of stitch.
Remove the tangle thread. If the
thread is tangled in the race, clean
the race.
Replace the needle.
Correctly install the needle.
Replace the needle plate.
Contact your retailer or the nearest
authorised service center.
Replace the presser foot.
Contact your retailer or the nearest
authorised service center.
Replace the bobbin case.
Contact your retailer or the nearest
authorised 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 race.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Reset the bobbin thread correctly.
Thread the upper thread and wind
the bobbin thread properly.
Correctly install the spool or spool
cap.
Choose a thread and needle that are
appropriate for the type of fabric.
Replace the needle.
Sew with the stabilizer material
under the fabric.
Shorten the stitch length, or sew with
stabilizer material under the fabric.
Reference
page 23
–
page 29
page 41
page 80, 84
page 30
page 30
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–
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page 15
page 15
–
page 80, 84
page 15
page 20, 21
page 20, 21, 23
page 24
page 29
page 30
page 44
page 38, 44