Trouble Shooting Guide - Necchi L234A Instruction Manual

Trouble shooting guide

Before calling for service, check the following items. If the problem still persists, contact the place
of purchase or your nearest authorized dealer.
Problem
1. Machine not properly
Machine
connected to power source.
does not run
1. Stitch length is set too short for
the fabric being sewn.
2. Differential feed is not set in
Fabric does
the correct position for the
not feed well
fabric being sewn.
3. Presser foot pressure not
correctly set for fabric being
sewn.
1. Needle may not be properly
seated in the needle clamp.
2. Manually pulling fabric from
Needle
behind presser foot while
breaks
sewing which causes needles
to deflect.
3. Needle may not be the correct
size for the fabric being sewn.
1. Machine may not be threaded
correctly; threads threaded in
the incorrect sequence.
2. Thread is not unreeling
smoothly off the thread spool.
3. Needle(s) may have a bent,
dull or broken point.
Thread
Breaks 4. The needle is inserted
incorrectly.
5. Using thread that is poor
quality or has uneven filament.
6. Thread tension is set too tight. 6. Loosen thread tension.
7. Thread is caught in one of the
thread guides.
1. Needle(s) may have a bent, dull
or broken point.
Stitches
2. Needle may not be properly
Skipping
seated in the needle clamp.
Cause
1. Check that machine has been
properly connected to power
source.
1. Increase the stitch length
setting.
2. Adjust the differential feed.
3. Adjust presser foot pressure.
1. Insert needle so that it is all the
way up in the needle clamp,
then tighten the screw securely.
2. Refrain from pulling fabric
manually; allow feed teeth to
draw fabric under presser foot.
3. Use a needle size that is
compatible for the fabric.
1. Check that machine is threaded
in correct order.
2. Check the thread spool to
ensure thread is not getting
caught.
3. Replace needle(s).
4. Insert the needle correctly.
5. Use good quality thread with a
smooth, even filament.
7. Check threading path to
ensure all threads are feeding
smoothly.
1. Replace needle(s).
2. Insert needle so that it is all the
way up in the needle clamp,
then tighten the screw securely
40
Correction Reference
3
20
18
19
6
-
10
10
-
6
6
-
16
-
6
-