Brother ST150HDH Operation Manual page 107

Symptom
The thread does
The needle was not raised.
not pass through
the eye of the
The needle is incorrectly installed.
needle.
The appropriate presser foot for the
type of stitch that you wish to sew is
not used.
The stitch is not
The thread tension is incorrectly set.
sewn correctly.
The thread is tangled, for example, in
the bobbin case.
The feed dogs are lowered.
The stitch is too short.
The fabric does
The combination of fabric, thread and
not feed.
needle is incorrect.
The thread is tangled, for example, in
the bobbin case.
While winding
the bobbin, the
bobbin thread
You have not wound the bobbin thread
was wound properly.
below the bobbin
winder seat.
The thread is not passed through the
bobbin-winding thread guide correctly.
Bobbin thread
does not wind Bobbin spins slowly.
neatly on the
bobbin.
The thread that was pulled out was not
wound onto the bobbin correctly.
Fabric being
sewn with the
Thread is tangled below the needle
machine cannot plate.
be removed.
The fabric feeds
in the opposite The feed mechanism is damaged.
direction.
The upper thread The bobbin thread is incorrectly
has tightened up. installed.
The thread is
tangled on the
You have not threaded the upper thread
wrong side of the properly.
fabric.
Probable Cause Remedy
Press (needle position button)
once or twice to raise the needle.
Correctly install the needle.
Attach the presser foot that is
appropriate for the type of stitch that
you wish to sew.
Adjust the thread tension.
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the race.
Slide the feed dog position switch to
.
Lengthen the stitch length.
Select a thread and needle that are
appropriate for the type of fabric
being sewn.
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the race.
After removing the thread wound below
the bobbin winder seat, wind the
bobbin correctly.
Correctly pass the thread through the
bobbin-winding thread guide.
Move the sewing speed controller to the
right (so that the speed will be fast).
Wind the thread that was pulled off
round the bobbin five or six times
clockwise.
Lift up the fabric and cut the threads
below it, and clean the race.
Contact your dealer or the nearest
authorized service center.
Correctly install the bobbin thread.
Correct the upper threading.
Reference
page 20
page 29
page 86
page 47
page 90
page 74
page 40
page 28
page 90
4
page 100
page 15
page 17
page 17
page 97
–
page 18,
93
page 20, 94
105