Pfaff SMART 200C Owner's Manual page 61

Problem
Seam puckering
Patterns are distorted
The machine jams
The machine is noisy
Uneven stitches, uneven
feed
The sewing machine does
not operate
Cause
1.The needle thread tension is too tight.
2.The needle thread is not threaded
correctly.
3.The needle is too heavy for the fabric
being sewn.
4.The stitch length is too long for the
fabric.
5.The presser foot pressure is not correctly
adjusted.
1.The correct presser foot is not used.
2.The needle thread tension is too tight.
1.Thread is caught in the hook.
2.The feed dogs are packed with lint.
1.Lint or oil have collected on the hook or
needle bar.
2.Poor quality oil has been used.
3.The needle is damaged.
4.Humming sound coming from internal
motor.
5.Thread is caught in the hook.
6.The feed dogs are packed with lint.
1.Poor quality thread.
2.The bobbin case is threaded wrong.
3.Fabric has been pulled.
1.The machine is not turned on.
2.The presser foot lever is raised.
3.The machine is not plugged in.
Correction
1.Loosen the thread tension.
2.Rethread the machine.
3.Choose a needle to suit the thread and
fabric.
4.Shorten stitch length.
5.Adjust the presser foot pressure.
1.Select the correct foot.
2.Loosen the thread tension.
Remove the upper thread and bobbin case,
turn the handwheel backwards and forwards
by hand and remove the thread and lint.
1.Clean the hook and feed dog as described.
2.Only use good quality sewing machine oil.
3.Replace the needle.
4.Normal.
Remove the upper thread and bobbin case,
turn the handwheel backwards and forwards
by hand and remove the thread and int.
1.Select a better quality thread.
2.Remove the bobbin case, the thread and
reinsert correctly.
3.Do not pull on the fabric while sewing, let it
be fed up by the feed dogs.
1.Turn on the machine.
2.Lower the presser foot lever.
3.Connect the power line plug to the electric
outlet.
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