Troubleshooting
Condition
Cause
Reference
The fabric is not
being fed
smoothly.
1. The feed dog is packed with lint.
2. The presser foot has been raised.
See page 90.
Lower the presser foot.
The needle
breaks.
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The fabric is forcedly pulled.
See page 18.
See page 18.
Pull the fabric lightly.
The thread
breaks.
1. The machine is not correctly threaded.
2. The needle or looper thread tension is too tight.
3. The needle is incorrectly inserted.
4. The needle is bent or blunt.
See pages 34 ~ 54, 64 and 68.
See pages 60, 62, 66, 70, 72 and 80.
See page 18.
See page 18.
Skipped stitches
1. The needle is bent or blunt.
2. The machine is not correctly threaded.
3. The needle is incorrectly inserted.
See page 18.
See pages 34 ~ 54, 64 and 68.
See page 18.
The seam is not
sewn neatly.
1. The needle and/or looper thread tensions are
not correctly adjusted.
2. The machine is not correctly threaded.
3. The needle and/or the thread are not suitable
for the fabric being sewn.
4. The thread is not between the tension discs.
See pages 60, 62, 66, 70, 72 and 80.
See pages 34 ~ 54 and 64.
See pages 74, 76, 84 and 86.
See pages 38, 44, 48 and 52.
Seam puckering
1. The needle or looper thread tension is too tight.
2. The machine is not correctly threaded.
3. The differential feed dial is not correctly
adjusted.
See pages 60, 62, 66, 70, 72 and 80.
See pages 34 ~ 54, 64 and 68.
See page 22.
The machine
does
not operate.
1. The machine has not been plugged in firmly.
2. The power switch is turned off.
See page 12.
See page 12.
The fabric is not
cut neatly.
1. The position of the upper knife is not adjusted
properly.
2. The upper knife is dull.
See page 88.
Replace the upper knife.
(See page 88.)
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