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Troubleshooting 203
7
The upper thread
breaks.
The automatic needle-threading
mechanism is broken.
Consult your nearest authorized
dealer.
Adhesive is attached to the
needle.
Replace the needle. p.63
The fabric is not taut.
Firmly set the fabric in the
embroidery frame so that it is
taut.
p.28, 67
The thread quality is poor.
The thread quality is too weak
due to age of thread. Replace
thread.
The embroidery data contains
stitches with a pitch of zero.
Delete all stitches with a zero
pitch.
p.150
The embroidery data contains
many stitches with an extremely
small pitch.
Delete all stitches with a small
pitch.
p.150
The thread density of the
embroidery data is too fine.
Three or more overlapping
stitches are being sewn.
Using a data design system,
correct the thread density and
overstitching settings in the
embroidery data.
p.100
The bobbin
thread breaks.
The bobbin thread is not
correctly threaded.
Correctly thread the bobbin
thread.
p.19
The bobbin is scratched or does
not rotate smoothly.
Replace the bobbin. p.18
The bobbin case is damaged. Replace the bobbin case. p.18
The thread is tangled.
Remove the thread jammed and
clean the hook.
p.193
A bobbin designed specifically
for this machine is not used.
Use the correct bobbin. p.15
Stitches are
skipped.
The upper thread is not threaded
correctly.
Thread the upper thread
correctly.
p.35
The needle is bent or blunt.
Replace the needle with a new
one.
p.15, 63
The needle is not installed
correctly.
Correctly install the needle. p.63
Dust has accumulated under the
needle plate or in the hook.
Clean the hook and the needle
plate.
p.193, 194
The needle and the hook are not
correctly passing each other.
Consult your nearest authorized
dealer.
The thread twist is either too
tight or too loose.
Improper twisting results in
irregular loop formation. Try
using a new spool.
The embroidery
pattern is
misaligned.
The thread is tangled.
Use tweezers to remove any
tangled thread from the hook.
The fabric is not well framed in
the embroidery frame (for
example, the fabric is not taut).
If the fabric is not taut, the
pattern may become misaligned
or the stitching may shrink. Be
sure to correctly frame the fabric
in the embroidery frame.
p.28, 67
The embroidery frame is too
large for the size of the
embroidery.
Use an embroidery frame that
matches the size of the
embroidery.
p.65
Symptom Probable Cause Remedy Reference Page
Sapphire_chapt7.fm Page 203 Friday, November 18, 2005 12:10 PM