Brother International Innov-is BQ950 Operation Manual - Page 135
Check the Fabric/Thread/Needle Combination
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Troubleshooting Symptom Fabric puckers. Skipped stitches No stitching High-pitched sound while sewing Fabric does not feed through the machine. Probable Cause Remedy Reference There is a mistake in the upper or bobbin threading. Check the steps for threading the machine and rethread it correctly. B-21 Spool cap is set incorrectly. Check the method for attaching the spool cap, then reattach the spool cap. B-21 Using improper needle or thread for the selected fabric. Check the "Fabric/Thread/Needle Combination" chart. B-28 Needle is turned, bent or the point is dull. Replace the needle. B-29 Stitches are too long when sewing thin fabrics. Shorten the stitch length. B-39 Thread tension is set incorrectly. Adjust the thread tension. B-40 Wrong presser foot. Use the correct presser foot. B-32 Machine is threaded incorrectly. Check the steps for threading the machine and rethread it correctly. B-21 Using improper needle or thread for the selected fabric. Check the "Fabric/Thread/Needle Combination" chart. B-28 Needle is turned, bent or the point is dull. Replace the needle. B-29 Needle is installed incorrectly. Reinstall the needle correctly. B-29 The needle is worn/damaged. Replace the needle. B-29 Dust or lint has collected under the needle plate. Remove the dust or lint with the brush. A-2 Thin or stretch fabrics are being sewn. Sew with one sheet of thin paper under the fabric. S-4, D-3 Needle is turned, bent or the point is dull. Replace the needle. B-29 Bobbin is set incorrectly. Reset the bobbin thread correctly. B-18 Upper threading is incorrect. Check the steps for threading the machine and rethread the machine. B-21 Dust or lint is caught in the feed dogs. Remove the dust or lint. A-2 Pieces of thread are caught in the race. Clean the race. A-2 Upper threading is incorrect. Check the steps for threading the machine and rethread the machine. B-21 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. B-15 There are needle holes or friction scratches in the bobbin case. Replace the bobbin case, or consult your authorized Brother dealer. A-2 Feed dogs are set in the down position. Slide the feed dog position switch to the right B-2 . Stitches are too close together. Lengthen the stitch length setting. B-39 Wrong presser foot was used. Use the correct presser foot. B-32 Needle is turned, bent or the point is dull. Replace the needle. B-29 Thread is entangled. Cut the entangled thread and remove it from the race. A-8 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. S-4 Presser foot pressure is set incorrectly for fabric. Adjust the presser foot pressure within the settings screen. B-43 MAINTENANCE AND TROUBLESHOOTING A Appendix A-15