Troubleshooting - Brother NC21SE Operation Manual

TROUBLESHOOTING

TROUBLESHOOTING

If you have a minor problem with your sewing machine, check the following solutions. If the solutions
suggested do not correct the problem, contact your authorized dealer. You can also press
for advice about minor sewing problems during sewing. Press
the original screen.
Problem
Upper thread breaks
Bobbin thread breaks Bobbin is set incorrectly.
Skipped stitches
Fabric puckers
High-pitched sound
while sewing
Cannot thread the
needle
240
Cause
Machine is not threaded correctly (used the
wrong spool cap, spool cap is loose, the thread
did not catch the needle bar threader, etc.)
Thread is knotted or tangled.
Thread is too thick for the needle.
Upper thread tension is too strong.
Thread is twisted.
Needle is turned, bent or the point is dull.
Needle is installed incorrectly.
There are scratches near the hole of the needle
plate.
There are scratches near the hole in the presser
foot.
There are scratches on the race.
There are scratches on the bobbin or it doesn't
rotate properly.
Thread is twisted.
Machine is threaded incorrectly.
Using improper needle or thread for the
selected fabric.
Needle is turned, bent or the point is dull.
Needle is installed incorrectly.
Needle is defective.
Dust or lint has collected under the needle plate. Remove the dust or lint with the brush.
There is a mistake in the upper or bobbin
threading.
Spool cap is set incorrectly.
Using improper needle or thread for the
selected fabric.
Needle is turned, bent or the point is dull.
Stitches are too long when sewing thin fabrics.
Thread tension is set incorrectly.
Wrong presser foot.
Dust or lint is caught in the feed dogs.
Pieces of thread are caught in the race.
Upper threading is incorrect.
There are scratches on the race.
Needle is not in the correct position.
Threading hook does not pass through the eye
of the needle.
Needle is installed incorrectly.
Solution
Rethread the machine correctly.
Rethread upper and lower thread.
Check needle and thread combinations.
Adjust the thread tension.
Use scissors, etc., to cut the twisted thread
and remove it from the race, etc.
Replace the needle.
Reinstall the needle correctly.
Replace the needle plate, or consult your
authorized dealer.
Replace the presser foot, or consult your
authorized dealer.
Replace the race, or consult your authorized
dealer.
Reset the bobbin thread correctly.
Replace the bobbin.
Use scissors, etc. to cut the twisted thread
and remove it from the race, etc.
Check the steps for threading the machine
and rethread it correctly.
Check the "Fabric/Thread/Needle
Combination" chart.
Replace the needle.
Reinstall the needle correctly.
Replace the needle.
Check the steps for threading the machine
and rethread it correctly.
Check the method for attaching the spool cap,
then reattach the spool cap.
Check the "Fabric/Thread/Needle
Combination" chart.
Replace the needle.
Shorten the stitch length.
Adjust the thread tension.
Use the correct presser foot.
Remove the dust or lint.
Clean the race.
Check the steps for threading the machine
and rethread the machine.
Replace the race, or consult your authorized
dealer.
Press the "Needle Position" button to raise the
needle.
Press the "Needle Position" button to raise the
needle.
Reinstall the needle correctly.
then
at any time to return to
Page
29
26, 29
41
50, 174
—
39
39
65
37
236
26
26
—
29
41
39
39
39
236
26, 29
29
41
39
49
50, 174
"STITCH SETTING
CHART"
236
236
29
236
3
3
39