Brother International SC9500 Users Manual - English - Page 102

APPENDIX Symptom The upper thread breaks. The lower thread is tangled or breaks. The fabric is wrinkled. Possible cause How to put it right 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. Use the spool cap that best fits the size of the spool being used. There are knots or tangles in the thread. Remove any knots or tangles. The needle is not appropriate for the Choose a needle that is appropriate thread you are using. for the type of stitch. The upper thread tension is too tight. Loosen the upper thread tension. The thread is tangled, for example, in the race. Remove the tangle thread. If the thread is tangled in the race, 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. Replace the needle plate. Contact your retailer or the nearest authorised service center. The area around the hole in the presser foot is scratched. Replace the presser foot. Contact your retailer or the nearest authorised service center. The bobbin case is scratched, or has a burr on it. Replace the bobbin case. Contact your retailer or the nearest authorised service center. You have not used a bobbin that has been designed for this machine. Incorrect bobbins will not work properly. Only use a bobbin that has been designed for this machine. You have not wound the bobbin thread properly. Wind the bobbin thread properly. The bobbin is scratched or does not turn smoothly. Replace the bobbin. The thread is tangled. Remove the tangled thread and clean the race. You have not used a bobbin that has been designed for this machine. Incorrect bobbins will not work properly. Only use a bobbin that has been designed for this machine. Bobbin is set incorrectly. Reset the bobbin thread correctly. You have not threaded the upper thread Thread the upper thread and wind properly or fitted the bobbin properly. the bobbin thread properly. The spool or spool cap is incorrectly Correctly install the spool or spool installed. cap. You have not used the right combination of fabric, thread and needle. Choose a thread and needle that are appropriate for the type of fabric. The needle is bent or blunt. Replace the needle. If thin fabrics are being sewn, the stitch is too long or the fabric is not being fed correctly. Sew with the stabilizer material under the fabric. If thin fabrics are being sewn, the stitch is too coarse. Shorten the stitch length, or sew with stabilizer material under the fabric. Reference page 23 - page 29 page 41 page 86, 90 page 30 page 30 - - - page 15 page 15 - page 86, 90 page 15 page 20, 21 page 20, 21, 23 page 24 page 29 page 30 page 44 page 38, 44 100