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66
MAINTENANCE
MANTENIMIENTO
MANUTENZIONE
Performance Checklist
Whenever sewing difficulties are encountered, review the section in this instruction manual that details the operation you are performing to make
sure you are correctly using the machine. If the problem continues, the following checklist may help you to improve the operation.
If you still have difficulties, contact your nearest service center.
The combination
of needle size/
thread size/fabric
is incorrect.
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No
Page 26
No
Page 25
No
Page 7
No
Page 33
No
Page 33
No
Page 26
No
Page 33
No
Page 26
No
Page 7
No
Page 35
No
Page 25
No
Page 33
No
Page 25
No
Page 7
No
Page 35
No
No
Pages 25–26
No
No
Page 7
No
Page 35
Pages 25–26
Page 65
FABRIC
PUCKERS
SKIPPED
STITCHES
LOOP IN SEAM
LOWER THREAD
BREAKS
UPPER THREAD
BREAKS
Lower thread is
tangled.
Needle is incor-
rectly inserted.
Thread tension is
incorrect.
Thread tension is
too tight.
Bobbin is not
threaded properly
in the shuttle
hook.
Upper thread is
tangled.
Inferior needle is
used.
Threading is not
correct.
The combination
of needle size/
thread size/fabric
is incorrect.
Lower thread
tension is too
tight.
Upper thread
tension is too
tight.
Wrong needle is
used.
Spool of thread is
not correctly
installed.
Lint is clinging to
the bottom of the
needle plate.
Lower threading is
not correct.
Needle is bent or
not sharp.
Threading is not
correct.
The combination
of needle size/
thread size/fabric
is incorrect.
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CONTACT YOUR LOCAL SERVICE CENTER
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Upper threading
is not correct.