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Troubleshooting
57
APPENDIX
4
If the machine stops operating correctly, check the
following possible problems before requesting service.
You can solve most problems by yourself. If you need
additional help, the Brother Solutions Center offers the
latest FAQs and troubleshooting tips. Visit us at “ http://
s.brother/cpjah/ ”.
If the problem persists, contact your Brother dealer or the
nearest Brother authorized service center.
■ Frequent troubleshooting topics
Detailed causes and remedies for common troubleshooting
topics are described below. Be sure to refer to this before
contacting us.
Upper thread tightened up
■ Symptom
• The upper thread appears as a single continuous line.
• The bobbin thread is visible from the right side of the
fabric. (Refer to the illustration below.)
• The upper thread has tightened up, and comes out
when pulled.
• The upper thread has tightened up, and wrinkles
appear in the fabric.
• The upper thread tension is tight, and the results do
not change even after the thread tension is adjusted.
1 Wrong side of fabric
2 Bobbin thread visible from right side of fabric
3 Upper thread
4 Right side of fabric
5 Bobbin thread
■ Cause
Incorrect bobbin threading
If the bobbin thread is incorrectly threaded, instead of the
appropriate tension being applied to the bobbin thread, it
is pulled through the fabric when the upper thread is
pulled up. For this reason, the thread is visible from the
right side of the fabric.
■ Remedy/check details
Correctly install the bobbin thread. (page 14)
Tangled thread on wrong side of fabric
■ Symptom
• The thread becomes tangled on the wrong side of the
fabric.
• After starting sewing, a rattling noise is made and
sewing cannot continue.
• Looking under the fabric, there is tangled thread in
the bobbin case.
Troubleshooting
Upper thread tightened up page 57
Tangled thread on wrong side of fabric page 57
Incorrect thread tension page 58
Fabric is caught in the machine and cannot
be removed
page 59
If the thread becomes tangled under the
bobbin winder seat
page 61
a
b
c
d
e
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