Troubleshooting 187
5
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The upper thread
breaks.
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).
Correct the upper threading. page 31
There are knots or tangles in the
thread. Remove any knots or tangles. –
The selected needle is not
appropriate for the thread being
used.
Select a needle that is appropriate for
the type of thread being used. page 41
The upper thread tension is too
tight. Loosen the upper thread tension. page 59
The thread is tangled, for example,
in the bobbin case.
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the race. page 184
The needle is bent or blunt. Replace the needle. page 42
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.
Replace the needle plate. Contact
your retailer or the nearest authorized
service center. –
The area around the hole in the
presser foot is scratched, or has a
burr on it.
Replace the presser foot. Contact
your retailer or the nearest authorized
service center. –
The bobbin case is scratched, or
has a burr on it.
Replace the bobbin case. Contact
your retailer or the nearest authorized
service center. –
A bobbin designed specifically for
this machine is not used.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
page 25
Bobbin thread
does not wind
neatly on the
bobbin.
The thread that was pulled out
was not wound onto the bobbin
correctly.
Wind the thread that was pulled off
around the bobbin five or six times
clockwise. page 27
Bobbin spins slowly. Move the sewing speed controller to
the right (so that the speed will be
fast). page 28
Symptom Probable Cause Remedy Reference