Brother International Innov-is 80 Operation Manual - Page 140
Symptom, Probable Cause, Remedy, Reference
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APPENDIX Symptom Probable Cause Remedy The upper thread was not threaded correctly (for example, the spool is not installed correctly, the spool cap is too big for the spool being used, or the thread has come out of the needle bar thread guide). Correct the upper threading. There are knots or tangles in the thread. Remove any knots or tangles. The selected needle is not appropriate for the thread being used. Select a needle that is appropriate for the type of thread being used. The upper thread tension is too tight. Loosen the upper thread tension. The upper thread breaks. The thread is tangled, for example, in the bobbin case. Remove the tangle thread. If the thread is tangled in the bobbin case, clean the race. The needle is bent or blunt. Replace the needle. The needle is incorrectly installed. Correctly install the needle. The area around the hole in the needle plate is scratched, or has a burr on it. Replace the needle plate. Contact your dealer or the nearest authorized service center. The area around the hole in the presser foot is scratched, or has a burr on it. Replace the presser foot. Contact your dealer or the nearest authorized service center. The bobbin case is scratched, or has a burr on it. Replace the bobbin case. Contact your dealer or the nearest authorized service center. A bobbin designed specifically for this machine is not used. Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine. The bobbin thread is incorrectly installed. Correctly install the bobbin thread. The lower thread is tangled or breaks. The bobbin is scratched or does not rotate smoothly, or has a burr on it. The thread is tangled. Replace the bobbin. Remove the tangled thread and clean the race. A bobbin designed specifically for this machine is not used. Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine. Reference page 28 - page 38 page 57 page 126 page 39 - - - page 22 page 26 - page 126 page 22 138