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.
3. Pressure of the foot is too weak.
See page 41.
Lower the presser foot.
See page 13.
The needle breaks. 1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The fabric is forcedly pulled.
See page 12.
See page 12.
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 18-27 and 32.
See pages 30,31,33 and 36.
See page 12.
See page 12.
Skipped stitches 1. The needle is bent or blunt.
2. The machine is not correctly threaded.
3. The needle is incorrectly inserted.
See page 12.
See pages 18-27 and 32.
See page 12.
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 30, 31, 33 and 36.
See pages 18-27 and 32.
See pages 34, 35, 38 and 39.
See pages 20, 23, 25 and 27.
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 30, 31, 33 and 36.
See pages 18-27 and 32.
See page 14.
The machine does not
operate.
1. The machine has not been plugged in firmly.
2. The power switch is turned off.
See page 9.
See page 9.
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 40.
Replace the upper knife.
(See page 40.)
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