Troubleshooting - Brother xl 3750 Manual De Instrucciones

APPENDIX / ANEXO —————————————————————————————————————————————————

Troubleshooting

If the machine stops working properly, check the following possible problems.
If the problem is still there, contact your retailer or the nearest authorized service center.
Symptom
The machine is not plugged in.
The main power switch is turned off. Turn on the main power switch.
The sewing
The bobbin-winder shaft is pushed
machine does
to the right.
not work.
You have not used the foot control-
ler properly.
The needle is not fitted properly.
The needle clamp screw is loose.
The needle is bent or blunt.
You have not used the right combi-
nation of fabric, thread and needle.
The presser foot you are using is not
appropriate for the type of stitch that
you want to sew.
The upper thread tension is too tight. Loosen the upper thread tension.
You are pulling the fabric too much.
The needle
breaks.
You have not fitted the spool properly. Fit the spool properly.
The area around the hole in the nee-
dle plate is scratched.
The area around the hole in the
presser foot is scratched.
The bobbin case is scratched.
You have not used a bobbin that has
been designed for this machine.
You have not threaded the upper thread
properly. (For example, you have not fit-
ted the spool properly, or the thread has
come out of the guide above the needle.)
There are knots or tangles in the
thread.
The needle is not appropriate for the
thread you are using.
The upper
thread breaks.
The upper-thread tension is too tight. Loosen the upper thread tension.
The thread is tangled.
The needle is bent or blunt.
You have not inserted the needle
properly.
72
Possible cause How to put it right
Plug the machine in.
Move the bobbin-winder shaft to the
left.
Use the foot controller properly.
Fit the needle properly.
Use a coin or screwdriver to firmly
tighten the screw.
Replace the needle.
Choose a thread and needle that are
appropriate for the type of fabric.
Attach the presser foot that is correct for
the type of stitch that you want to sew.
Lightly guide the fabric.
Replace the needle plate.
Contact your retailer or the nearest
authorized service center.
Replace the presser foot.
Contact your retailer or the nearest
authorized service center.
Replace the bobbin case.
Contact your retailer or the nearest
authorized service center.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Correct the upper threading.
Remove any knots or tangles.
Choose a needle that is appropriate
for the type of stitch.
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the bobbin case.
Replace the needle.
Insert the needle properly.
Reference
page 15
page 15
page 27
page 15
page 16
page 17
page 16
page 39
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page 38
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page 32, 37
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page 26
page 32
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page 39
page 38
page 70
page 16
page 17