Brother International XR9550 Operation Manual - Page 72

APPENDIX Symptom Possible cause How to put it right Reference Dust has built up in the feed dogs or in Remove the needle plate cover and the race. clean the plate and the race. page 60, 61 You have not threaded the upper thread properly. Correct the upper threading. There is a high- pitched noise while Replace the bobbin case. sewing. The bobbin case is scratched. Contact your retailer or the nearest authorized service center. page 16 - You have not used 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. page 11 The feed dogs are lowered. Slide the feed dog position lever to . page 37, 42 The stitch is too fine. Lengthen the stitch length. page 26 You have not used the right combination Choose a thread and needle that are of fabric, thread and needle. appropriate for the type of fabric. page 20 The thread is tangled, for example, in The fabric does not the race. feed. The presser foot you are using is not appropriate for the type of stitch that you want to sew. Remove the tangle thread. If the thread is tangled in the race, clean the race. Attach the presser foot that is correct for the type of stitch that you want to sew. page 60, 62 page 52 The needle is bent or blunt. Replace the needle. page 21 Zigzag foot "J" is slanted on a thick seam at the beginning of stitching. Use the presser foot locking pin (black button on the left side) on zigzag foot "J" to keep the presser foot level while sewing. page 29 The fabric feeds in the opposite direction. The feed mechanism is damaged. Contact your retailer or the nearest authorized service center. - ■■After sewing Symptom Possible cause How to put it right Reference The upper thread The bobbin thread is incorrectly has tightened up. installed. Correctly install the bobbin thread. page 15, 62 You have not threaded the upper thread properly. Correct the upper threading. page 16 You have not wound the bobbin thread properly. Wind the bobbin thread properly. page 11 The bobbin thread is incorrectly installed. Correctly install the bobbin thread. page 15 You have not threaded the right combination of thread and needle for The thread tension the fabric you are using. is incorrect. You have not attached the presser foot holder properly. Choose a thread and needle that are appropriate for the type of fabric. Attach the presser foot holder properly. page 20 page 24 The thread tension is incorrect. Adjust the tension of the upper thread. page 27, 62 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. page 11 Bobbin is set incorrectly. Reset the bobbin thread correctly. page 14, 15, 16 The thread is tangled on the wrong side of the fabric. You have not threaded the upper thread properly. Correct the upper threading. page 16, 62 The stitch is not sewn correctly. The presser foot you are using is not appropriate for the type of stitch that you want to sew. Attach the presser foot that is correct for the type of stitch that you want to sew. page 52 70