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102
There are loops in the upper thread.
The upper thread tension is low.
• After passing the upper thread through the hole
in the presser foot, pull the thread by hand to
check the thread tension.
—
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 guides, causing the
thread guide plates to rise. Clean the thread
guide plates.
93
Thread is not correctly threaded around the
thread tension disc.
• Clean the thread tension disc. Rethread and
make sure the thread tension disc rotate when
pulling on thread.
94
The thread quality is poor.
• Try embroidery 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. 91
The upper thread is not threaded correctly. 62
The hook is damaged.
• Replace the hook.
*
Not enough oil was applied. 96
The needle threader cannot be used.
Recommended needles are not used on this
machine.
94
The needle is not installed correctly. 94
The hook of the automatic needle-threading
mechanism is bent.
97
Symptom
Probable Cause/Remedy Page
The thread tension is incorrect.
The upper thread is not threaded correctly. 62
The bobbin thread is not correctly threaded. 27
The bobbin thread tension is incorrect. 81
Lint or dust has accumulated in the thread
tension disc.
94
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 bobbin thread.
27
Although the thread is not broken, a broken thread
error occurs and the machine stops.
If the thread breakage sensor in the thread
tension disc of the thread tension knob cannot
detect that the thread is being fed, even if the
machine is running, a broken thread error occurs
and the machine is stopped.
• Correctly pass the thread through the thread
tension disc. If the broken thread error occurs
after the machine is rethreaded, the sensor
may be damaged.
63
*
The thread is worn.
Lint or dust has accumulated in the thread
tension disc.
94
Jump stitches are long.
Lint or dust has accumulated in the thread
tension disc.
94
Long jump stitches have been specified. 59
There are needle cuts or holes in the garment.
The needle is dull.
• Replace the needle. Dull needles have a
difficult time passing through the garment,
causing fabrics to tear.
94
The fabric is too delicate.
• The simple penetration of the needle could
damage delicate fabrics. Use stabilizer on top
of fabric.
—
Symptom
Probable Cause/Remedy Page
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