Brother International LB-6770 Users Manual - English - Page 156
Troubleshooting
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APPENDIX Troubleshooting If the machine stops operating correctly, check the following possible problems before requesting service. You can solve most problems by yourself. If you need additional help, the Brother Solutions Center offers the latest FAQs and troubleshooting tips. Visit us at [http://solutions.brother.com]. If the problem persists, contact your dealer or the nearest authorized service center. Symptom Probable Cause Remedy The machine is not turned on. Turn on the machine. The start/stop button was not pressed. Press the start/stop button. The sewing machine does not operate. The presser foot lever is raised. The start/stop button was pressed, even though the foot controller is connected. Lower the presser foot lever. Do not use the start/stop button when the foot controller is connected. To use the start/stop button, disconnect the foot controller. The bobbin winder shaft is on the Slide the bobbin winder shaft to the right side after winding the left. bobbin. The needle is incorrectly installed. Correctly install the needle. The needle clamp screw is loose. Use the screwdriver to firmly tighten the screw. The needle is bent or blunt. Replace the needle. The combination of fabric, thread and needle is not correct. Select a thread and needle that are appropriate for the type of fabric being sewn. The presser foot that is used is not Attach the presser foot that is appropriate for the type of stitch appropriate for the type of stitch that that you wish to sew. you wish to sew. The upper thread tension is too tight. Loosen the upper thread tension. The needle breaks. The fabric is pulled too much. The spool is incorrectly installed. Lightly guide the fabric. Correctly install the spool. The area around the hole in the Replace the needle plate. Contact needle plate is scratched, or has a your dealer or the nearest authorized burr on it. service center. The area around the hole in the Replace the presser foot. Contact presser foot is scratched, or has a your dealer or the nearest authorized burr on it. service center. The bobbin case is scratched, or has a burr on it. Replace the bobbin case. Contact your dealer or the nearest authorized service center. 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. Reference page 17 page 51 page 50 page 51 page 26 page 41 page 39 page 70 page 59 page 31 - page 22 154