172
The upper thread
breaks.
The area around the hole in the needle
plate is damaged.
1
Scratches/Burrs
Replace the needle plate or consult
your nearest authorized Brother dealer.
The needle is touching the needle
plate.
1
Needle
2
Needle plate hole
3
Needle touching hole
Consult your nearest authorized
Brother dealer.
The presser foot is set too high and not
correctly positioned.
The needle hits/touches the presser
foot.
Consult your nearest authorized
Brother dealer.
Using a weak thread like a metallic
thread.
Slow down the machine embroidering
speed.
p. 99
Sliding surface on hook is not smooth.
There are burns on it.
1
Hook race area
Consult your nearest authorized
Brother dealer.
The thread is loose in the hook area.
Remove the loose thread. If the thread
is tangled in the hook, clean the hook.
p. 164
The play between the hook and the
race is too much.
Consult your nearest authorized
Brother dealer.
The hook does not rotate smoothly.
Remove lint, clean and apply oil.
p. 164, 168
The space between the hook stopper
and the hook cannot be adjusted.
Consult your nearest authorized
Brother dealer.
The upper thread is not threaded
correctly.
Pull the upper thread by hand from
below the presser foot, and check that
the thread moves smoothly. If the
thread does not move smoothly, it is
not correctly threaded.
Unthread the machine and
rethread the machine.
Make sure the thread is correctly
positioned in the needle bar thread
guide.
p. 48-51
Upper thread is not positioned in upper
or middle guide plate.
Make sure thread passes completely
under upper and middle guide plate.
p. 48-51
The lower thread tension is incorrect.
The thread does not roll out of the
bobbin case smoothly.
Adjust the lower thread tension.
p. 91
Symptom
Probable Cause
Remedy
Reference Page
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