Brother ADDENDUM 884-T07, Operation Manual

Page: 261 / 280

Troubleshooting 259
7
—————————————————————————————————————————————————————————————————————————————————————
There are loops in
the upper thread.
The thread tension does not
correspond to the amount that
the thread tension knob was
tightened.
If the thread tension cannot be
adjusted, thread wax and dust
may have collected in the
upper or middle thread guide
plates, causing the thread
tension guide plates to rise.
Clean the thread tension guide
plates.
p.248
Thread is not correctly threaded
around upper thread tension
discs.
Clean upper thread tension
disc. Rethread and make sure
tension disc rotates when
pulling on thread.
p.249
The thread quality is poor.
Try sewing with different
thread. If the problem no
longer occurs after the thread is
changed, the thread quality is
the problem. Replace the
thread with one of good
quality.
The machine is
noisy.
Lint may be wound in the hook. Clean the hook. p.245
The upper thread is not
threaded correctly.
Check the thread path, and
then thread the upper thread
again.
p.55
The hook is damaged.
Replace the hook.
Consult your nearest
authorized dealer.
Not enough oil was applied. Oil recommended parts. p.250
The needle
threader cannot
be used.
The needle is not at the correct
position.
Touch the key to move the
desired needle bar to be
threaded into embroidering
position.
p.62
Recommended needles are not
used on this machine.
Replace and use recommended
needle.
p.33, 86
The needle is not installed
correctly.
Correctly install the needle. p.33, 86
The hook on the automatic
needle-threading mechanism is
bent.
Consult your nearest
authorized dealer.
p.33, 86
The thread
tension is
incorrect.
The upper thread is not
threaded correctly.
Check the thread path, and
then thread the upper thread
again.
p.55
The bobbin thread is not
correctly threaded.
Correctly thread the bobbin
thread.
p.36
The lower thread tension is
incorrect.
Adjust the tension of the
bobbin thread.
p.112
The upper thread
comes out of the
needle when
embroidering
begins.
If a short length of thread
remains after the thread is
trimmed, the needle may
become unthreaded when
embroidering begins again.
Set the remaining length of
thread to “LONG TAIL” on the
second page of the settings
screen.
p.201
The upper thread
does not reach
the bobbin thread
when
embroidering
begins.
There is no more thread in the
bobbin, the thread does not
feed from the bobbin, or the
thread that is fed from the
bobbin is too short.
Correctly thread the lower
thread.
p.36
Symptom Probable Cause Remedy Reference Page