Brother Entrepreneur Pro PR1000e Operation Manual page 295

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Symptom
The upper thread
breaks.
Probable Cause
Sliding surface on hook is not
smooth. There are burns on it.
1 Hook race area
The thread is loose in the hook
area.
The play between the hook and
the race is too much.
The hook does not rotate
smoothly.
The space between the hook
stopper and the hook cannot be
adjusted.
The upper thread is not
threaded correctly.
Upper thread is not positioned
in upper or middle thread guide.
There are knots or tangles in the
thread.
The upper thread tension is too
high.
The lower thread tension is
incorrect.
The thread does not roll out of
the bobbin case smoothly.
The bobbin case is damaged.
The bobbin thread is not wound
correctly.
A bobbin designed specifically
for this machine is not used.
The automatic needle-threading
mechanism is broken.
Remedy
Consult your nearest Brother
dealer.
Remove the loose thread. If the
thread is tangled in the hook,
clean the hook.
Consult your nearest Brother
dealer.
Remove lint, clean and apply
oil.
Consult your nearest Brother
dealer.
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.
Un-thread the machine and
re-thread the machine.
Make sure the thread is
correctly positioned in the
needle bar thread guide.
Make sure thread passes
completely under upper and
middle thread guide.
Remove any knots or tangles.
Decrease the upper thread
tension.
Adjust the lower thread
tension.
Replace the bobbin case with a
new one.
Check that the bobbin is
wound so that it is about 80%
full and that the thread is
evenly wound. If the bobbin is
not correctly wound, replace
the bobbin with one that is
correctly wound or rewind the
bobbin.
Use the correct bobbin.
Consult your nearest Brother
dealer.
Reference Page
p.282
p.282, 287
p.56-59
p.56-59
p.123
p.122
p.35
p.35
p.35
Troubleshooting 293
7