Brother International Innov-is 4500D Operation Manual - Page 254
If you restart the machine, follow the instructions for operating the machine correctly.
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TROUBLESHOOTING Problem Needle breaks Cause Needle is installed incorrectly. Needle clamp screw is not tightened. Needle is turned or bent. Using improper needle or thread for the selected fabric. Wrong presser foot was used. Solution Reinstall the needle correctly. Tighten the needle clamp screw. Replace the needle. Check the "Fabric/Thread/Needle Combination" chart. Use the recommended presser foot. Upper thread tension is too strong. Fabric is pulled during sewing. Spool cap is set incorrectly. There are scratches around the holes in the needle plate. There are scratches around the hole(s) in the presser foot. There are scratches on the race. Fabric does not feed through the machine Needle is defective. Feed dogs are set in the down position. Stitches are too close together. Wrong presser foot was used. Adjust the thread tension setting. Do not pull the fabric during sewing. Check the method for attaching the spool cap, then reattach the spool cap. Replace the needle plate, or consult your authorized dealer. Replace the presser foot, or consult your authorized dealer. Replace the race, or consult your authorized dealer. Replace the needle. Use the feed dog position lever to raise the feed dogs. Lengthen the stitch length setting. Use the correct presser foot. Needle is turned, bent or the point is dull. Replace the needle. Thread is entangled. Cut the entangled thread and remove it from the race. Machine does not operate There is no pattern selected. "Start/Stop" button was not pushed. Select a pattern. Press the "Start/Stop" button. Main power switch is not turned on. Turn the main power to ON. Presser foot is not lowered. Lower the presser foot. "Start/Stop" button was pushed with the foot controller attached. Remove the foot controller, or use the foot controller to operate the machine. Speed control lever is set to control the zigzag Use the foot controller instead of the "Start/ stitch width. Stop" button to operate the machine. All keys and buttons have been locked by . Press buttons. to unlock all keys and Embroidery unit does There is no pattern selected. not operate Main power switch is not turned on. Select a pattern. Turn the main power to ON. Embroidery unit is not attached correctly. Reattach the embroidery unit correctly. Embroidery frame was attached before the unit Perform the initialization process correctly. was initialized. LCD display is difficult LCD contrast is not properly adjusted. to see Adjust the LCD contrast. Nothing happens, even if the LCD display is pressed The screen has been locked. Press either of the following keys to unlock the screen. Page 39 40 39 41 "STITCH SETTING CHART" 50, 174 - 29 65 37 236 39 85 49 "STITCH SETTING CHART" 39 - 59, 116, 149, 199 3 10 3 45 45 37, 39 149, 199 10 146 146 19, 238 - CAUTION • This machine is equipped with a thread detection device. If the "Start/Stop" button is pushed before the upper threading is done, the machine will not operate properly. Also, depending on the pattern selected, the machine may feed the fabric even if the needle is raised. This is due to the needle bar release mechanism. At these times, the machine will make a sound different from that made during normal sewing. This is not the sign of a malfunction. • If the power is disconnected during sewing: Turn the main power to OFF and unplug the machine. If you restart the machine, follow the instructions for operating the machine correctly. 242