Symptom | Probable Cause | Remedy | Reference |
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| The upper thread is incorrectly | Correct the upper threading. | page 20 |
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| installed. |
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| The bobbin thread is incorrectly | Correct the bobbin threading. | page 18 |
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| installed. |
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| The bobbin thread is incorrectly | Correctly wind the bobbin. | page 15 |
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| The combination of fabric, thread and | Select a thread and needle that are |
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The thread ten- | appropriate for the type of fabric | page 28 |
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needle is incorrect. | being sewn. |
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sion is incorrect. |
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| The presser foot holder is incorrectly | Correctly install the presser foot | page 33 |
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| installed. | holder. |
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| The thread tension is incorrectly set. | Adjust the thread tension. | page 47 |
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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 |
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| this machine is not used. |
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| designed specifically for this |
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| machine. |
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| The upper thread or bobbin thread is | Correctly thread the upper thread and | page 18, |
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| incorrectly installed. | correctly install the bobbin thread. | 20 |
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| The spool is incorrectly installed. | Correctly install the spool. | page 15 | |
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| The combination of fabric, thread and | Select a thread and needle that are |
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| appropriate for the type of fabric | page 28 |
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The fabric is | needle is incorrect. | being sewn. |
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puckered. |
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The needle is bent or blunt. | Replace the needle with a new one. | page 29 |
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| If thin fabrics are being sewn, the | Sew with stabilizer material under the |
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| stitch is too long or the fabric is not | page 49 |
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| being fed correctly. | fabric. |
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| The thread tension is incorrectly set. | Adjust the thread tension. | page 47 |
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| The upper thread is incorrectly | Correct the upper threading. | page 20 |
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| installed. |
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| The combination of fabric, thread and | Select a thread and needle that are |
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| appropriate for the type of fabric | page 28 |
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Stitches are | needle is incorrect. | being sewn. |
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skipped. |
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The needle is bent or blunt. | Replace the needle with a new one. | page 29 |
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| The needle is incorrectly installed. | Correctly install the needle. | page 29 |
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| Dust has accumulated under the | Remove the needle plate cover and | page 91 |
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| needle plate or in the bobbin case. | clean the bobbin case. |
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| Dust has accumulated in the feed | Clean the bobbin case. | page 91 |
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| dogs or in the bobbin case. |
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| The upper thread is incorrectly | Correct the upper threading. | page 20 |
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A | installed. |
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sound is pro- |
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| Replace the bobbin case. |
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duced while sew- |
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The bobbin case is scratched. | Contact your dealer or the nearest | – |
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ing. |
| authorized service center. |
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A rattling noise is |
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produced. |
| 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 |
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| this machine is not used. |
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| designed specifically for this |
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| machine. |
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