Symptom | Probable Cause | Remedy | Reference |
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| There are knots or tangles in the | Remove any knots or tangles. | - |
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| The upper thread tension is too | Loosen the upper thread tension. | page 64 |
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| The thread is tangled, for example, | Remove the tangled thread. If the |
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| thread is tangled in the bobbin case, | page 78 |
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| in the bobbin case. |
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| clean the race. |
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| The needle is bent or blunt. | Replace the needle. | page 28 |
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The upper thread |
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The needle is incorrectly installed. | Correctly install the needle. |
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breaks. |
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The area around the hole in the | Replace the embroidery foot. |
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| embroidery foot is scratched, or | Contact your dealer or the nearest | - |
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| has a burr on it. | authorized service center. |
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| The bobbin case is scratched, or | Replace the bobbin case. |
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| Contact your dealer or the nearest | - |
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| has a burr on it. |
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| authorized service center. |
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| Incorrect bobbins will not work |
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| A bobbin designed specifically for | properly. Only use a bobbin | page 29 |
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| this machine is not used. | designed specifically for this |
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| The thread is not passed through | Correctly pass the thread through the |
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Bobbin thread | the | page 31 |
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correctly. |
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does not wind |
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neatly on the | The thread that was pulled out | Wind the thread that was pulled off |
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bobbin. |
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was not wound onto the bobbin | around the bobbin five or six times | page 32 |
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| correctly. | clockwise. |
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| The bobbin thread is incorrectly | Correctly install the bobbin thread. | page 34 |
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| installed. |
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| The bobbin is scratched or does |
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| not rotate smoothly, or has a burr | Replace the bobbin. | - |
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The lower thread is | on it. |
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tangled or breaks. | The thread is tangled. | Remove the tangled thread and clean | page 78 |
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| the race. |
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| Incorrect bobbins will not work |
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| A bobbin designed specifically for | properly. Only use a bobbin | page 29 |
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| this machine is not used. | designed specifically for this |
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| machine. |
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The thread is |
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tangled on the | The upper thread was not | Correct the upper threading. | page 38 |
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wrong side of the | threaded correctly. |
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fabric. |
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| Correct the upper threading. |
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| The upper thread was not | Make sure that the thread is hanged | page 38, |
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| on the thread guide spring which is |
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The thread tension | threaded correctly. | page 39 |
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on the left side of the thread guide |
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is incorrect. |
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| The bobbin thread is incorrectly | Correctly install the bobbin thread. | page 34 |
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| installed. |
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Troubleshooting 83