Brother PR-620 Operation Manual page 218

Symptom
The needle is not correctly
installed .
The needle set screw is loose.
The needle is bent or blunt.
The area around the hole in the
needle plate is damaged.
The needle is touching the
needle plate.
The upper thread
breaks.
The presser foot is set too high
and not correctly positioned.
The needle hits/touches the
presser foot.
The area around the embroidery
foot hole is damaged.
Using a weak thread like a
metallic thread.
Probable Cause
1
1 Scratches/Burrs
1
2
3
1 Needle
2 Needle plate hole
3 Needle touching hole
1
1 Scratches/Burrs
Remedy
Correctly install the needle.
Use the Allen screw driver to
tighten the needle set screw.
Replace the needle with a new
one.
Replace the needle plate or
consult your nearest authorized
dealer.
Consult your nearest authorized
dealer.
Consult your nearest authorized
dealer.
Replace the presser foot.
Consult your nearest authorized
dealer.
Slow down the machine sewing
speed.
Reference Page
p.63
p.63
p.15, 63
p.91
Troubleshooting 201
7