Section Vii - Trouble Shooting - Silver 392 Mode D'emploi

TROUBLE SHOOTING
Condition
The machine does
not run smoothly
and is noisy
The needle thread
breaks.
The bobbin thread
breaks.
The needle
breaks.
Skipped stitches.
Seam Puckering.
1. Threads have been caught in hook mechanism.
2. The feed dog is packed with lint.
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 fabric is not being drawn to the back when sewing is
finished.
6 The thread is either too heavy or too fine for the needle.
1.The bobbin thread is not threaded properly in the bobbin
case.
2.Lint has collected in the bobbin case.
3.The bobbin is damaged and doesn't turn smoothly.
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 back 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.
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.
1. The needle thread tension is too tight.
2. The machine is not threaded correctly.
3. The needle is too heavy for the cloth being sewn.
4. The stitches are too coarse for the fabric being sewn.
5. The presser foot pressure is not correctly adjusted.
* When sewing extremely light weight materials, place a
sheet of paper underneath the fabric.
Section
Partie
Cause
VII
Teil
Sezione
Reference
See page 28-29
See Page 21
See Page 32
See Page 35
See Page 23
See Page 23
See Page 29-30
Clean the bobbin
case.
Exchange bobbin.
See Page 23
See page 23
See Page 23
See Page 35-36
See Page 24
See Page 35
See Page 23
See Page 23
See Page 24
See Page 24
See Page 32
See Page 22
See Page 35-36
See Page 32
Se Page 24
Make the
stitches denser.
See Page 22
73