Brother International SE725 Operation Manual - Page 93

Troubleshooting Symptom, Cause/solution Reference The upper thread is too tight. The bobbin thread is incorrectly installed. 22 Bobbin thread breaks. Bobbin is set incorrectly. 22 Bobbin thread is incorrectly wound. 19 A scratched bobbin is being used. 22 Thread is tangled. 87 A bobbin designed specifically for this machine is 19 not used. Fabric puckers. There is a mistake in the upper or bobbin threading. Spool of thread is set incorrectly. 19, 23 19 Using improper needle or thread for the selected 27 fabric. Needle is turned, bent or the point is dull. 28 Stitches are too long when sewing thin fabrics. 35 Thread tension is set incorrectly. 36, 86 Wrong presser foot was used. 29 The fabric is not pressed down correctly. - The stitch is not sewn correctly. The presser foot that is used is not appropriate for 29 the type of stitch that you wish to sew. The thread tension is incorrect. 36, 86 The thread is tangled, for example, in the bobbin case. Feed dogs are set in the down position. • Slide the feed dog position switch to the right ( ). 87 9, 50 Skipped stitches Machine is threaded incorrectly. 19, 23 Using improper needle or thread for the selected 27 fabric. Needle is turned, bent or the point is dull. 28 Needle is installed incorrectly. 28 Dust or lint has collected under the needle plate. 83 Thin or stretch fabrics are being sewn. 39 • Attach stabilizer material to the fabric. Not stitching Needle is turned, bent or the point is dull. 28 Bobbin is set incorrectly. 22 Upper threading is incorrect. 23 High-pitched sound while sewing Dust or lint is caught in the feed dogs. 83 Pieces of thread are caught in the race. 83 Upper threading is incorrect. 23 A bobbin designed specifically for this machine is 19 not used. There are needle holes or friction scratches in the * bobbin case. Symptom, Cause/solution Reference Fabric does not feed through the machine. Feed dogs are set in the down position. • Slide the feed dog position switch to the right ( ). Stitches are too close together. Wrong presser foot was used. 9, 50 35 29 Needle is turned, bent or the point is dull. 28 Thread is entangled. 87 Zigzag foot "J" is slanted on a thick seam at the 39 beginning of stitching. The fabric feeds in the opposite direction. The feed mechanism is damaged. * The needle contacts the needle plate. The needle clamp screw is loose. 28 Needle is turned, bent or the point is dull. 28 Fabric being sewn with the machine cannot be removed. Thread is tangled below the needle plate. 87 A broken needle has fallen into the machine. • Turn off the machine, and remove the needle 87 plate. If the needle that fell into the machine can be seen, use tweezers to remove it. After removing the needle, return the needle plate to its original position and insert a new needle. Before turning on the machine, slowly turn the handwheel toward you to check that it turns smoothly and that the new needle enters through the center of the needle plate opening. If the handwheel does not turn smoothly or the needle that fell into the machine cannot be removed, consult your authorized Brother dealer or the nearest Brother authorized service center. The handwheel does not turn smoothly. Thread is tangled in the bobbin case. 83, 85, 87 APPENDIX 5 ■ After sewing Symptom, Cause/solution Reference Thread tension is incorrect. Upper threading is incorrect. 23, 86 Bobbin is set incorrectly. 22, 86 Using improper needle or thread for the selected 27 fabric. Presser foot holder is not attached correctly. 29 Thread tension is set incorrectly. 36, 86 Bobbin thread is incorrectly wound. 22 Needle is turned, bent or the point is dull. 28 A bobbin designed specifically for this machine is 19 not used. 91