Trouble Shooting - John Lewis JL 300 Manual

Trouble Shooting

Condition
1. Threads have been caught in hook mechanism.
The machine does not
2. The feed dog is packed with lint.
run smoothly and is
noisy.
The needle thread 1. The needle thread is not threaded properly.
breaks. 2. The needle thread tension is too tight.
3. The needle is bent or blunt.
4. The needle is incorrectly inserted.
5. The fabric is not being drawn to the rear when sewing is finished.
6. The thread is either too heavy or too fine for the needle.
The bobbin thread 1. The bobbin thread is not threaded properly in the bobbin holder.
breaks. 2. Lint has collected in the bobbin holder.
3. The bobbin is damaged and doesn't turn smoothly.
The needle breaks.
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The needle clamp screw is loose.
4. The tension of the needle thread is too tight.
5. The fabric is not drawn to the rear when sewing is finished.
6. The needle is too fine for the fabric being sewn.
7. The pattern selector dial has been turned while the needle was in the material.
Skipped stitches.
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The needle and/or threads are not suitable for the work being sewn.
4. A BLUE TIPPED needle is not being used for sewing stretch, very fine fabrics and synthetics.
5. The needle thread is not threaded properly.
6. The presser foot pressure is not strong enough.
Cause Reference
See Page 32
See Page 32
See Page 11
See Page 13
See Page 8
See Page 8
See Page 15
See Paae 8
See Page 10
See Page 32
Replace bobbin.
See Page 8
See Page 8
See Page 8
See Page 13
See Page 15
See Page 8
See Page 8
See Page 8
See Page 8
See Page 8
See Page 8
See Page 11
See Page 6
33