Brother International Innov-is 4750D Operation Manual - Page 253
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TROUBLESHOOTING Problem Cause Solution Page Cannot lower the Presser foot was raised using the "Presser Foot Press the "Presser Foot Lifter" button to lower 3 presser foot with the Lifter" button. the presser foot. presser foot lever Thread tension is incorrect Upper threading is incorrect. Check the steps for threading the machine 29 and rethread the machine. Bobbin is set incorrectly. Reset the bobbin. (If needle plate was 26 removed. reinstall needle plate and tighten screws prior to installing bobbin case.) Using improper needle or thread for the Check the "Fabric/Thread/Needle 41 selected fabric. Combination" chart. Presser foot holder is not attached correctly. Reattach the presser foot holder correctly. 38 Thread tension is set incorrectly. Adjust the thread tension. 50, 174 Character pattern does not turn out Wrong presser foot was used. Attach the correct presser foot. "STITCH SETTING CHART" Pattern adjustment settings were set incorrectly. Revise the pattern adjustment settings. 121 Did not use a stabilizer material on thin fabrics Attach a stabilizer material. 120 or stretch fabrics. Thread tension is set incorrectly. Adjust the thread tension. 50, 174 Embroidery pattern Thread is twisted. Use scissors, etc., to cut the twisted thread - does not sew out and remove it from the race, etc. correctly Fabric was not inserted into the frame correctly If the fabric is not stretched tight in the frame, 159 (fabric was loose, etc.). the pattern may turn out poorly or there may be shrinkage of the pattern. Set the fabric into the frame correctly. Stabilizing material was not attached. Always use stabilizing material, especially 157 with stretch fabrics, lightweight fabrics, fabrics with a coarse weave, or fabrics that often cause pattern shrinkage. See your authorized dealer for the proper stabilizer. There was an object placed near the machine, If the frame bumps something during sewing, 165 and the carriage or embroidery frame hit the the pattern will turn out poorly. Do not place object during sewing. anything in the area where the frame may bump it during sewing. Fabric outside the frame edges interferes with Reinsert the fabric in the embroidery frame so 159 the sewing arm, so the embroidery unit cannot that the excess fabric is away from the sewing move. arm, and rotate the pattern 180 degrees. Fabric is too heavy, so the embroidery unit Place a large thick book or similar object - cannot move freely. under the arm head to lightly lift the heavy side and keep it level. Fabric is hanging off the table. If the fabric is hanging off the table during 165 embroidery, the embroidery unit will not move freely. Place the fabric so that it does not hang off the table or hold the fabric to keep it from dragging. Fabric is snagged or caught on something. Stop the machine and place the fabric so that - it does not get caught or snagged. Embroidery frame was removed during sewing If the presser foot is bumped or the 170 (for example, to reset the bobbin). The presser embroidery unit is moved during sewing, the foot was bumped or moved while removing or pattern will not turn out. Be careful when 8 attaching the embroidery frame, or the removing or reattaching the embroidery frame embroidery unit was moved. during sewing. Appendix Loops appear on the The thread tension is incorrectly set. Adjust the thread tension. 174 surface of the fabric The tension of the upper thread is incorrectly set Use the embroidery needle plate cover. 165 when embroidering for the combination of the fabric, thread and pattern being used. The combination of the bobbin case and bobbin Change the bobbin case or bobbin thread so 165 thread is incorrect. that the correct combination is used. 241