Singer H74 Instruction Manual 2 - Page 81

Problem, Cause, Correction, Reference

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TROUBLE SHOOTING GUIDE Problem Seam puckering Cause Correction Reference 1.The needle thread tension is too tight. 1.Loosen the thread tension. 2.The needle thread is not threaded 2.Rethread the machine. correctly. 3.The needle is too heavy for the fabric 3.Choose a needle to suit the thread and being sewn. fabric. 4.Stitch length is too long for the fabric. 4.Shorten stitch length Page 19 Page 13 Page 22 Page 28 Patterns are distorted The machine jams The machine is noisy Uneven stitches, uneven feed The sewing machine doesn't operate 1.The correct presser foot is not used. 1.Select the correct foot. 2.The needle thread tension is too tight. 2.Loosen the thread tension. 3.The stitch length is not suitable for the 3.Make a stitch adjustment and add fabric being sewn. stabilizer to the fabric. 1.Thread is caught in the hook. 2.The feed dogs are packed with lint. Remove the upper thread and bobbin case. Turn the handwheel backwards and forwards by hand and remove the thread remnants. 1.Lint or oil have collected on the hook or 1.Clean the hook and feed dog as needle bar. described. 2.The needle is damaged. 2.Replace the needle. 3.Slight humming sound coming from 3.Normal. internal motor. 4.Thread is caught in the hook. 5.The feed dogs are packed with lint. Remove the upper thread and bobbin case. Turn the handwheel backwards and forwards by hand and remove the thread remnants. 1.Poor quality thread. 1.Select a better quality thread. 2.The bobbin case is threaded wrong. 2.Remove the bobbin case, the thread and reinsert correctly. 3.Fabric has been pulled. 1.The machine is not turned on. 3.Do not pull on the fabric while sewing, let it be taken up by the machine. 1.Turn on the machine. 2.The Start/stop button was not pressed. 2.Press the Start/stop button. 3.The presser foot lever is raised. 3.Lower the presser foot lever. 4.The Start/stop button was pressed, even 4.Do not use Start/stop button when the though the foot controller is connected. foot controller is connected. To use Start/stop button, disconnect the foot controller. 5.A thread is caught in the hook race. 5.Remove the upper thread and bobbin case. Turn the handwheel backwards and forwards by hand and remove the thread remnants. 6.The machine is not plugged in. 6.Connect the power line plug to the electric outlet. 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 76

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76
TROUBLE SHOOTING GUIDE
Seam
puckering
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.Stitch length is too long for the fabric.
1.Loosen the thread tension.
2.Rethread the machine.
3.Choose a needle to suit the thread and
fabric.
4.Shorten stitch length
Problem
Cause
Correction
Reference
Page 19
Page 13
Page 22
Page 28
Patterns are
distorted
1.The correct presser foot is not used.
2.The needle thread tension is too tight.
3.The stitch length is not suitable for the
fabric being sewn.
1.Select the correct foot.
2.Loosen the thread tension.
3.Make
a
stitch
adjustment
and
add
stabilizer to the fabric.
Page 77
Page 19
Page 28
The machine
jams
Remove the upper thread and bobbin
case. Turn the handwheel backwards and
forwards by hand and remove the thread
remnants.
1.Lint or oil have collected on the hook or
needle bar.
1.Clean
the
hook
and
feed
dog
as
described.
1.Thread is caught in the hook.
2.The feed dogs are packed with lint.
Page 23
Page 73
The sewing
machine
doesn't
operate
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
though the foot controller is connected.
5.A thread is caught in the hook race.
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.
The machine
is noisy
2.The needle is damaged.
2.Replace the needle.
Uneven
stitches,
uneven feed
1.Poor quality thread.
2.The bobbin case is threaded wrong.
3.Fabric has been pulled.
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.
4.Thread is caught in the hook.
3.Slight humming sound coming from
internal motor.
3.Normal.
5.The feed dogs are packed with lint.
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.
6.The machine is not plugged in.
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9
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Page
9
Page 73