Brother 888-F50 Operation Manual page 136

Troubleshooting
Symptom
The fabric feeds in
the opposite The feed mechanism is damaged.
direction.
The needle
The needle clamp screw is loose.
contacts the
needle plate.
Needle is turned, bent or the point is dull.
Fabric being sewn
with the machine
Thread is tangled below the needle plate.
cannot be
removed.
A broken needle
has fallen into the –
machine.
The handwheel
feels sluggish Thread is tangled in the bobbin case.
when it is turned.
The presser foot that is used is not appropriate
for the type of stitch that you wish to sew.
The thread tension is incorrect.
The stitch is not
The thread is tangled, for example, in the
sewn correctly.
bobbin case.
Feed dogs are set in the down position.
A-16
Probable Cause Remedy
Contact your authorized Brother dealer or the
nearest Brother authorized service center.
Firmly tighten the needle clamp screw. If the
needle is bent or blunt, replace it with a new
one.
Replace the needle.
Lift up the fabric and cut the threads below it,
and clean the race.
Turn off the machine, and then remove the
needle plate. If the needle that fell into the
machine can be seen, use tweezers to remove
it. After removing the needle, return the needle
plate to its original position and insert a new
needle.
Before turning on the machine, slowly turn the
handwheel toward you to check that it turns
smoothly and that the new needle enters
through the center of the needle plate opening.
If the handwheel does not turn smoothly or the
needle that fell into the machine cannot be
removed, contact your authorized Brother
dealer or the nearest Brother authorized service
center.
Remove the tangled thread from the bobbin
case. Re-install the bobbin case so it is
correctly positioned.
Attach the presser foot that is appropriate for
the type of stitch that you wish to sew.
Adjust the tension of the upper thread.
Remove the tangle thread. If the thread is
tangled in the bobbin case, clean the race.
Slide the feed dog position switch to the right
.
Reference
–
B-29
B-29
A-8
A-8
A-5, A-8
B-32
B-40, A-6
A-8
B-2