Singer 9340 Instruction Manual page 85

TROUBLE SHOOTING GUIDE
Problem
1.The needle thread tension is too tight.
2.The needle thread is not threaded
correctly.
Seam
puckering
3.The needle is too heavy for the fabric
being sewn.
4.Stitch length is too long for the fabric.
1.The correct presser foot is not used.
Patterns are
2.The needle thread tension is too tight.
distorted
3.The stitch length is not suitable for the
fabric being sewn.
1.Thread is caught in the hook.
The machine
2.The feed dogs are packed with lint.
jams
1.Lint or oil have collected on the hook or
needle bar.
2.The needle is damaged.
The machine
3.Slight humming sound coming from
is noisy
internal motor.
4.Thread is caught in the hook.
5.The feed dogs are packed with lint.
1.Poor quality thread.
Uneven
2.The bobbin case is threaded wrong.
stitches,
uneven feed
3.Fabric has been pulled.
1.The machine is not turned on.
2.The Start/stop button was not pressed.
3.The presser foot lever is raised.
4.The Start/stop button was pressed, even
The sewing
though the foot controller is connected.
machine
doesn't
operate
5.A thread is caught in the hook race.
6.The machine is not plugged in.
Cause Correction
1.Loosen the thread tension.
2.Rethread the machine.
3.Choose a needle to suit the thread and
fabric.
4.Shorten stitch length
1.Select the correct foot.
2.Loosen the thread tension.
3.Make a stitch adjustment and add
stabilizer to the fabric.
Remove the upper thread and bobbin
case. Turn the handwheel backwards and
forwards by hand and remove the thread
remnants.
1.Clean the hook and feed dog as
described.
2.Replace the needle.
3.Normal.
Remove the upper thread and bobbin
case. Turn the handwheel backwards and
forwards by hand and remove the thread
remnants.
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 taken up by the machine.
1.Turn on the machine.
2.Press the Start/stop button.
3.Lower the presser foot lever.
4.Do not use Start/stop button when the
foot controller is connected. To use
Start/stop button, disconnect the foot
controller.
5.Remove the upper thread and bobbin
case. Turn the handwheel backwards
and forwards by hand and remove the
thread remnants.
6.Connect the power line plug to the
electric outlet.
Reference
Page 19
Page 13
Page 22
Page 28
Page 77
Page 19
Page 28
Page 73
Page 73
Page 23
--
Page 73
Page 22
Page 12
--
Page 9
Page 24
Page 17
Page 24
Page 73
Page 9