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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
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 38, 44
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 53
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 30
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 14, 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 14
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 23
The thread tension is incorrect. Adjust the tension of the upper thread. page 28, 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
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 53
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