APPENDIX
Symptom | Probable Cause | Remedy | Reference | |
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| The upper thread was not threaded | Correct the upper threading. | page 28 | |
| correctly. | |||
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| The bobbin thread is incorrectly | Correctly install the bobbin | page 26 | |
| installed. | thread. | ||
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| The combination of fabric, thread | Select a thread and needle that |
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| are appropriate for the type of | page 38 | ||
| and needle is not correct. | |||
| fabric being sewn. |
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The thread tension |
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The presser foot holder is incorrectly | Correctly install the presser foot |
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is incorrect. | page 43 | |||
| installed. | holder. | ||
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| The thread tension is incorrect. | Adjust the tension of the upper | page 57 | |
| thread. | |||
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| Incorrect bobbins will not work |
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| A bobbin designed specifically for | properly. Only use a bobbin | page 22 | |
| this machine is not used. | designed specifically for this | ||
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| machine. |
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| The upper thread was not threaded | Correctly thread the upper thread | page 26, | |
| correctly, or the bobbin is incorrectly | and correctly install the bobbin | ||
| page 28 | |||
| installed. | thread. | ||
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| The spool is incorrectly installed. | Correctly install the spool. | page 28 | |
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| The combination of fabric, thread | Select a thread and needle that |
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| are appropriate for the type of | page 38 | ||
The fabric is | and needle is not correct. | |||
fabric being sewn. |
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wrinkled. |
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The needle is bent or blunt. | Replace the needle. | page 39 | ||
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| If thin fabrics are being sewn, the | Shorten the stitch length or sew |
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| with stabilizer material under the | page 60 | ||
| stitch is too long. | |||
| fabric. |
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| The thread tension is incorrect. | Adjust the tension of the upper | page 57 | |
| thread. | |||
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| The upper thread was not threaded | Correct the upper threading. | page 28 | |
| correctly. | |||
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| The combination of fabric, thread | Select a thread and needle that |
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| are appropriate for the type of | page 38 | ||
| and needle is not correct. | |||
Stitches are | fabric being sewn. |
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skipped. | The needle is bent or blunt. | Replace the needle. | page 39 | |
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| The needle is incorrectly installed. | Correctly install the needle. | page 39 | |
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| Dust has accumulated under the | Remove the needle plate cover | page 149 | |
| needle plate or in the bobbin case. | and clean the race. | ||
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