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Troubleshooting 79
3
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The upper thread
breaks.
There are knots or tangles in the
thread.
Remove any knots or tangles.
-
The upper thread tension is too
tight.
Loosen the upper thread tension. page 63
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 74
The needle is bent or blunt. Replace the needle.
page 28
The needle is incorrectly installed. Correctly install the needle.
The area around the hole in the
embroidery foot is scratched, or
has a burr on it.
Replace the embroidery foot.
Contact your dealer or the nearest
authorized service center.
-
The bobbin case is scratched, or
has a burr on it.
Replace the bobbin case.
Contact your dealer 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 29
Bobbin thread
does not wind
neatly on the
bobbin.
The thread is not passed through
the bobbin-winding thread guide
correctly.
Correctly pass the thread through the
bobbin-winding thread guide.
page 31
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 32
The lower thread is
tangled or breaks.
The bobbin thread is incorrectly
installed.
Correctly install the bobbin thread. page 34
The bobbin is scratched or does
not rotate smoothly, or has a burr
on it.
Replace the bobbin.
-
The thread is tangled.
Remove the tangled thread and clean
the race.
page 74
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 29
The thread is
tangled on the
wrong side of the
fabric.
The upper thread was not
threaded correctly.
Correct the upper threading. page 38
The thread tension
is incorrect.
The upper thread was not
threaded correctly.
Correct the upper threading.
Make sure that the thread is hanged
on the thread guide spring which is
on the left side of the thread guide
cover.
page 38,
page 39
The bobbin thread is incorrectly
installed.
Correctly install the bobbin thread. page 34
Symptom Probable Cause Remedy Reference
appendix1 Page 79 Monday, August 18, 2008 8:08 PM