Brother International ULT-2001 Users Manual - English - Page 300

MAKING MINOR MACHINE ADJUSTMENTS If you have a minor problem with your sewing machine, check the following solutions. If the solutions suggested do not correct the problem, contact your authorized dealer. Problem Upper thread breaks Bobbin thread breaks Skipped stitches Cause 1 Machine is not threaded correctly (used the wrong spool cap, spool cap is loose, the thread did not catch the needle bar threader, etc.) 2 Thread is knotted or tangled. 3 Thread is too thick for the needle. 4 Upper thread tension is too strong. 5 Thread is twisted. 6 Needle is turned, bent or the point is dull. 7 Needle is installed incorrectly. 8 There are scratches near the hole of the needle plate. 9 There are scratches near the hole in the presser foot. 0 There are scratches on the race. 1 Bobbin is set incorrectly. 2 There are scratches on the bobbin or it doesn't rotate properly. 3 Thread is twisted. 1 Machine is threaded incorrectly. 2 Using improper needle or thread for the selected fabric. 3 Needle is turned, bent or the point is dull. 4 Needle is installed incorrectly. 5 Needle is defective. 6 Dust or lint is collected under the nee- dle plate. Solution Rethread the machine correctly. Page 1-32 Re-thread upper and lower thread. 1-31, 1-32 Check needle and thread combi- 1-45 nations. Adjust the thread tension. 2-13, 5-40 Use scissors, etc., to cut the twisted 7-2 thread and remove it from the race, etc. Replace the needle. 1-43 Reinstall the needle correctly. 1-43 Replace the needle plate, or con- 8-2 sult your authorized dealer. Replace the presser foot, or con- 1-39 sult your authorized dealer. Replace the race, or consult your 8-2 authorized dealer. Reset the bobbin thread correctly. 1-31 Replace the bobbin. 1-31 Use scissors, etc. to cut the twisted thread and remove it from the race, etc. Check the steps for threading the machine and rethread it correctly. Check the "Fabric/Thread/Needle Combination" chart. Replace the needle. Reinstall the needle correctly. Replace the needle. Remove the dust or lint with the brush. 7-2 1-32 1-45 1-43 1-43 1-43 8-2 CONTENTS 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - ?! Troubleshooting 9-5 Index