Operation Manual

APPENDIX
70
Symptom Possible cause How to put it right Reference
There is a high-
pitched noise while
sewing.
Dust has built up in the feed dogs or in
the race.
Remove the needle plate cover and
clean the plate and the race.
page 60, 61
Youhavenotthreadedtheupperthread
properly.
Correcttheupperthreading. page 16
The bobbin case is scratched.
Replace the bobbin case.
Contactyourretailerorthenearest
authorized service center.
–
Youhavenotusedbobbinthathas
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 11
The fabric does not
feed.
The feed dogs are lowered.
Slide the feed dog position lever to .
page 37, 42
The stitch is too fine. Lengthen the stitch length. page 26
Youhavenotusedtherightcombination
of fabric, thread and needle.
Chooseathreadandneedlethatare
appropriate for the type of fabric.
page 20
The thread is tangled, for example, in
the race.
Remove the tangle thread. If the thread
is tangled in the race, clean the race.
page 60, 62
The presser foot you are using is not
appropriate for the type of stitch that
you want to sew.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
page 52
The needle is bent or blunt. Replace the needle. page 21
Zigzag foot “J” is slanted on a thick
seam at the beginning of stitching.
Usethepresserfootlockingpin(black
buttonontheleftside)onzigzagfoot“J”
to keep the presser foot level while sewing.
page 29
The fabric feeds
in the opposite
direction.
The feed mechanism is damaged.
Contactyourretailerorthenearest
authorized service center.
–
■
After sewing
Symptom Possible cause How to put it right Reference
The upper thread
has tightened up.
The bobbin thread is incorrectly
installed.
Correctlyinstallthebobbinthread. page 15, 62
The thread tension
is incorrect.
Youhavenotthreadedtheupperthread
properly.
Correcttheupperthreading. page 16
Youhavenotwoundthebobbinthread
properly.
Windthebobbinthreadproperly. page 11
The bobbin thread is incorrectly
installed.
Correctlyinstallthebobbinthread. page 15
Youhavenotthreadedtheright
combination of thread and needle for
the fabric you are using.
Chooseathreadandneedlethatare
appropriate for the type of fabric.
page 20
Youhavenotattachedthepresserfoot
holder properly.
Attach the presser foot holder properly. page 24
The thread tension is incorrect. Adjust the tension of the upper thread. page 27, 62
Youhavenotusedabobbinthathas
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 11
Bobbin is set incorrectly.
Reset the bobbin thread correctly.
page 14, 15,
16
The thread is tangled
on the wrong side of
the fabric.
Youhavenotthreadedtheupperthread
properly.
Correcttheupperthreading. page 16, 62
The stitch is not
sewn correctly.
The presser foot you are using is not
appropriate for the type of stitch that
you want to sew.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
page 52