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APPENDIX
Symptom
The thread tension is incorrect.
The thread tension
is incorrect.
A bobbin designed specifically for
this machine is not used.
The upper thread is
The bobbin thread is incorrectly
too tight.
installed.
The upper thread was not
threaded correctly.
The needle is bent or blunt.
Stitches are
skipped.
The needle is incorrectly installed. Correctly install the needle.
Dust has accumulated under the
needle plate or in the bobbin case.
Dust has accumulated in the
bobbin case.
The upper thread was not
threaded correctly.
A high-pitched
noise is made
The bobbin case is scratched, or
while
has a burr on it.
embroidering.
A bobbin designed specifically for
this machine is not used.
The needle has not been raised to
The thread does
the correct position.
not pass through
the eye of the
needle.
The needle is incorrectly installed. Correctly install the needle.
The thread tension is incorrect.
The stitch is not
sewn correctly.
The thread is tangled, for example,
in the bobbin case.
The needle
threader lever does
The needle has not been raised to
not lower to the
the correct position.
correct position.
The lamps are damaged.
The lamps do not
come on.
The machine is not turned on.
Nothing appears in
The brightness of the LCD is either
the LCD.
too light or too dark.
84
Probable Cause
Remedy
Adjust the tension of the upper thread
and the bobbin thread.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
Correctly install the bobbin thread.
Correct the upper threading.
Replace the needle.
Remove the needle plate cover and
clean the race.
Clean the race.
Correct the upper threading.
Replace the bobbin case.
Contact your dealer or the nearest
authorized service center.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
Press the needle position button.
Adjust the tension of the upper thread
and the bobbin thread.
Remove the tangle thread. If the
thread is tangled in the bobbin case,
clean the race.
Press the needle position button.
Contact your dealer or the nearest
authorized service center.
Turn on the machine.
Adjust the brightness of the LCD.
Reference
page 64,
page 65
page 29
page 34
page 38
page 28
page 28
page 78
page 78
page 38
-
page 29
page 38
page 28
page 64,
page 65
page 78
page 38
-
page 18
page 89
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Table of Contents
Troubleshooting
