Brother PE-780D Operation Manual page 78

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APPENDIX
Symptom
The upper thread was not
threaded correctly.
The needle is bent or blunt.
Stitches are
skipped.
The needle is incorrectly installed. Correctly install the needle.
Dust has accumulated under the
needle plate or in the bobbin case.
Dust has accumulated in the
bobbin case.
The upper thread was not
threaded correctly.
A high-pitched
noise is made
The bobbin case is scratched, or
while
has a burr on it.
embroidering.
A bobbin designed specifically for
this machine is not used.
The thread does The needle has not been raised to
not pass through the correct position.
the eye of the
The needle is incorrectly installed. Correctly install the needle.
needle.
The thread tension is incorrect.
The stitch is not
sewn correctly.
The thread is tangled, for example,
in the bobbin case.
The lamps are damaged.
The lamps do not
come on.
The machine is not turned on.
Nothing appears The brightness of the LCD is either
on the LCD. too light or too dark.
Machine does not
An animation is displayed on the
operate when
LCD.
button is pressed.
No pattern selected.
Embroidery unit
The embroidery unit is not set up
does not move.
correctly.
Embroidering
continues
Dust has collected on the bobbin
although the
thread sensor.
bobbin thread
ran out.
76
Probable Cause Remedy
Correct the upper threading.
Replace the needle.
Remove the needle plate cover and
clean the race.
Clean the race.
Correct the upper threading.
Replace the bobbin case. Contact
your retailer or the nearest authorized
service center.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
Press the needle position button.
Adjust the tension of the upper
thread.
Remove the tangle thread. If the
thread is tangled in the bobbin case,
clean the race.
Contact your retailer or the nearest
authorized service center.
Turn on the machine.
Adjust the brightness of the LCD.
Touch the LCD with your finger, and
the animation will disappear.
Select a pattern.
Set up the embroidery unit correctly.
Remove any dust from the bobbin
thread sensor.
Reference
page 30
page 35
page 36
page 70
page 70
page 30
–
page 24
page 32
page 36
page 64
page 70
–
page 19
page 81
page 20
page 49
page 15
page 70