Brother Innov-is 4750D - Manual (Page 14)

12
Troubleshooting
Several solutions for minor problems are described
below. If the problem persists, contact your nearest
authorized dealer.
■ The Thread was Accidentally Cut
Automatically and the Bobbin Thread is
Caught inside the Machine (Only for
Machines Equipped with the Automatic
Thread Cutting Function)
a
Cut the thread near the fabric above the
needle plate, and then remove the fabric.
a Thread
b
Remove the bobbin, and then hold it out
toward the left side of the machine.
c
Lower the presser foot.
d
Press the “Thread Cutter” button again, and
then pull the thread out to the left while the
thread cutter is operating.
■ The Pattern is Misaligned
Refer to “Adjusting the Thread Tension” and increase
the upper thread tension. If the pattern is still
misaligned, reduce the tension of the bobbin thread.
Example: Decorative Stitch
a Correct tension
b The upper thread tension is too loose, or the bobbin
thread tension is too tight.
■ The Bobbin Thread Catches on the Tension
Spring of the Bobbin Case
Sew with no tension applied to the bobbin thread.
(Refer to see “When Tension is Not Applied to the
Bobbin Thread” on page 6.)
CAUTION
• DO NOT adjust the position of the phillips (+)
screw on the bobbin case (gray) as this may result in
damage to the bobbin case, rendering it useless.
• If the slotted screw (-) is difficult to turn, do not use
force. Turning the screw too much or providing
force in either (rotational) direction may cause
damage to the bobbin case. Should damage occur,
the bobbin case may not maintain proper tension.
Note
• If the bobbin thread tension is tight, the thread
cannot be passed through the tension spring when
the bobbin is installed in the bobbin case. (Refer to
see “When Tension is Not Applied to the Bobbin
Thread” on page 6.)
CAUTION
• Do not pull on the thread with excessive force,
otherwise the machine may be damaged.