APPENDIX
Symptom | Probable Cause | Remedy | Reference | |
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| The upper thread was incorrectly |
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| threaded (for example, the spool is |
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| incorrectly installed or the thread has | Correct the upper threading. | page 20 | |
| come out of the needle bar thread |
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| guide). |
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| There are knots or tangles in the | Remove any knots or tangles. | – | |
| thread. | |||
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| The selected needle is not | Select a needle that is appropriate for | page 28 | |
| appropriate for the thread being used. | the type of stitch being used. |
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| The upper thread tension is too tight. | Loosen the upper thread tension. | page 47 | |
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| The thread is tangled, for example, in | Remove the tangled thread. If the | page 91 | |
| the bobbin case. | thread is tangled in the bobbin case, | ||
| clean the race. |
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The upper thread | The needle is bent or blunt. | Replace the needle with a new one. | page 29 | |
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breaks. | The needle is incorrectly installed. | Correctly install the needle. | page 29 | |
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| The area around the hole in the | Replace the needle plate. |
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| Contact your dealer or the nearest | – | ||
| needle plate is scratched. | |||
| authorized service center. |
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| The area around the hole in the | Replace the presser foot. |
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| Contact your dealer or the nearest | – | ||
| presser foot is scratched. | |||
| authorized service center. |
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| Replace the bobbin case. |
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| The bobbin case is scratched. | Contact your dealer or the nearest | – | |
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| authorized service center. |
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| Bobbins from older models, which |
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| A bobbin designed specifically for | have a different thickness, will not |
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| work properly. Only use a bobbin | page 15 | ||
| this machine is not used. | |||
| designed specifically for this |
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| machine. |
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| The bobbin thread is incorrectly | Correct the bobbin threading. | page 18 | |
| installed. | |||
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| The bobbin thread is incorrectly | Correctly wind the bobbin. | page 15 | |
| wound. | |||
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| There are scratches on the bobbin or | Replace the bobbin. | – | |
The lower thread | it doesn’t rotate properly. | |||
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is tangled or |
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| Remove the tangled thread and clean |
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breaks. | The thread is tangled. | page 91 | ||
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| the race. |
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| Bobbins from older models, which |
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| A bobbin designed specifically for | have a different thickness, will not |
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| work properly. Only use a bobbin | page 15 | ||
| this machine is not used. | |||
| designed specifically for this |
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| machine. |
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