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APPENDIX ——————————————————————————————————————————————————————————————————————————————————————————————————————————
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94
The upper thread
breaks.
The upper thread was incorrectly
threaded (for example, the spool is
incorrectly installed or the thread has
come out of the needle bar thread
guide).
Correct the upper threading. page 20
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 stitch being used.
page 28
The upper thread tension is too tight. Loosen the upper thread tension. page 47
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 91
The needle is bent or blunt. Replace the needle with a new one. page 29
The needle is incorrectly installed. Correctly install the needle. page 29
The area around the hole in the
needle plate is scratched.
Replace the needle plate.
Contact your dealer or the nearest
authorized service center.
–
The area around the hole in the
presser foot is scratched.
Replace the presser foot.
Contact your dealer or the nearest
authorized service center.
–
The bobbin case is scratched.
Replace the bobbin case.
Contact your dealer or the nearest
authorized service center.
–
A bobbin designed specifically for
this machine is not used.
Bobbins from older models, which
have a different thickness, will not
work properly. Only use a bobbin
designed specifically for this
machine.
page 15
The lower thread
is tangled or
breaks.
The bobbin thread is incorrectly
installed.
Correct the bobbin threading. page 18
The bobbin thread is incorrectly
wound.
Correctly wind the bobbin. page 15
There are scratches on the bobbin or
it doesn’t rotate properly.
Replace the bobbin. –
The thread is tangled.
Remove the tangled thread and clean
the race.
page 91
A bobbin designed specifically for
this machine is not used.
Bobbins from older models, which
have a different thickness, will not
work properly. Only use a bobbin
designed specifically for this
machine.
page 15
Symptom Probable Cause Remedy Reference