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Troubleshooting
161
5
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A high-pitched
noise is made
while sewing.
Dust has accumulated in the feed
dogs or in the bobbin case.
Clean the race.
page 156
The upper thread was not
threaded correctly.
Correct the upper threading.
page 32
The bobbin case is scratched, or
has a burr on it.
Replace the bobbin case.
Contact your authorized retailer.
-
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 22
The thread does
not pass through
the eye of the
needle.
The needle has not been raised to
the correct position.
Press the needle position button.
page 32
The needle is incorrectly installed. Correctly install the needle.
page 41
The stitch is not
sewn correctly.
The presser foot that is used is not
appropriate for the type of stitch
that you wish to sew.
Attach the presser foot that is
appropriate for the type of stitch that
you wish to sew.
page 70
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 59
The thread is tangled, for example,
in the bobbin case.
Remove the tangle thread. If the
thread is tangled in the bobbin case,
clean the race.
page 156
The fabric does not
feed.
The feed dogs are lowered.
Slide the drop feed lever to the right.
page 102
The stitch is too fine.
Lengthen the stitch length.
page 59
The presser foot that is used is not
appropriate for the type of stitch
that you wish to sew.
Attach the presser foot that is
appropriate for the type of stitch that
you wish to sew.
page 70
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 156
The fabric feeds in
the opposite
direction.
The feed mechanism is damaged.
Contact your authorized retailer.
-
The needle
threader lever does
not lower to the
correct position.
The needle has not been raised to
the correct position.
Press the needle position button.
page 32
The sewing lamp
does not come on.
The sewing lamp is damaged.
Contact your authorized retailer.
-
The machine is not turned on.
Turn on the machine.
page 17
Nothing appears in
the LCD.
The brightness of the LCD is either
too light or too dark.
Adjust the brightness of the LCD.
page 167
Machine does not
operate when
embroidery key is
pressed.
The embroidery unit is not
attached.
Attach the embroidery unit.
page 123
Symptom
Probable Cause
Remedy
Reference
0711-0120-C-combo_E.book Page 161 Tuesday, August 26, 2008 2:43 PM
Summary of Contents for A-LINES Sofia BL137A
Page 1: ......
Page 16: ...14...
Page 70: ...SEWING BASICS 68...
Page 156: ...154 EMBROIDERY...
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