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25
5
Insert the bobbin case so that the and marks
align�
CAUTION
• Never use a bobbin case that is scratched,
otherwise the upper thread may become
tangled, the needle may break or sewing
performance may suffer� For a new
bobbin case, contact your nearest Brother
authorized service center�
• Make sure that you fit the bobbin case
properly, otherwise the needle may break�
6
Attach the needle plate, and then tighten the
screws�
Troubleshooting
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 support website offers the
latest FAQs and troubleshooting tips� Visit us at “ http://
s�brother/cpkag/ ” �
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 as follows� Be sure to refer
to this before contacting us�
Topic Page
Upper thread tightened up 25
Tangled thread on wrong side of fabric 25
Incorrect thread tension 26
Fabric is caught in the machine and cannot be
removed
26
If the thread becomes tangled under the bobbin
winder seat
★
28
Upper thread tightened up
n Symptom
• The upper thread appears as a single continuous
line�
• The bobbin thread is visible from the upper 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
n 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�
n Remedy/check details
Correctly install the bobbin thread� (page 9)
Tangled thread on wrong side of
fabric
n 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�
★: Only for some models�
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