Janome DC4030 Manuel D'instructions page 85

Troubleshooting
Condition
The needle thread
breaks.
The bobbin thread
breaks.
The needle breaks.
Skipped stitches
Seam puckering
The cloth is not
feeding smoothly.
Stitches form loops
below the works.
The machine does not
work.
Buttonhole sewing is
not sewn properly.
The machine does not
run smoothly and is
noisy.
1. The needle thread is not threaded properly.
2. The needle thread tension is too tight.
3. The needle is bent or blunt.
4. The needle is incorrectly inserted.
5. The needle thread and the bobbin thread are not set under the
presser foot when start sewing.
6. The thread were not drawn to the rear after sewing.
7. The thread is either too heavy or too fine for the needle.
1. The bobbin thread is not threaded properly in the bobbin holder.
2. Lint has collected in the bobbin holder.
3. The bobbin is damaged and doesn't turn smoothly.
1. The needle is incorrectly inserted.
2. The needle clamp screw is loose.
3. The threads were not drawn to the rear after sewing.
4. The needle is too fine for the fabric being used.
1. The needle is incorrectly inserted, bent or blunt.
2. The needle and/or threads are not suitable for the work being
sewn.
3. A Blue Tip needle is not being used for sewing stretch, very
fine fabrics and synthetics.
4. The needle thread is not threaded properly.
5. A poor quality needle is used.
1. The needle thread tension is too tight.
2. The needle thread is not threaded properly.
3. The needle is too heavy for the fabric being sewn.
4. The stitche length is too long for the fabric.
1. The feed dog is packed with lint.
2. The stitches are too fine.
3. The feed dog is not raised after "drop feed" sewing.
1. The needle thread tension is too loose.
2. The needle is either too heavy or too fine for the thread.
1. The machine is not plugged in.
2. Thread has been caught in the hook race.
3. The bobbin winder spindle is not returned to the left after bobbin
winding.
1. The stitch density is not suitable for the fabric being sewn.
2. Suitable interface material has not been used for the stretch
or synthetic fabric.
1. Thread has been caught in the hook race.
2. Lint has built up in the hook race or bobbin holder.
Cause
81
Reference
Page 26
Pages 28-30
Page 18
Page 18
Page 32
Page 32
Page 18
Page 24
Page 74
Change the bobbin.
Page 18
Page 18
Page 32
Page 18
Page 18
Page 18
Page 18
Page 26
Page 18
Pages 28-30
Page 26
Page 18
Adjust the stitch length.
Page 74
Adjust the stitch length.
Page 16
Pages 28-30
Page 18
Page 8
Page 74
Page 22
Page 52
Use an interface.
Page 74
Page 74