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Problem
Cause
Solution
Machine
will
not
Power
supply
interrupted.
Close
looper
cover
operate
although
(see
page
8>.
master
switch
is
on
fabric
not
neatly
Waste
thread
between
Clean
blades.
trimmed,
upper
and
lower
blade.
Lower
blade
is
blunt.
Replace
lower
blade
(see
page
57>.
Puckered
seams.
Thread
tension
Reduce
thread
tension.
too
tight.
Incorrect
setting
of
Re-adjust
differential
feed
diffential
feed.
(see
pages
28,
29).
Thread
has
caught
due
to
Thread
correctly
incorrect
threading.
(see
pages
12
-
20).
Fabric
not
fed
Stitches
too
short.
Increase
stitch
length
through
evenly.
(see
page
27>.
Sewing
foot
pressure
to
low
Increase
presser
foot
pressure
for
heavy
fabrics.
(see
page
21).
Sewing
foot
pressure
too
high
Reduce
presser
foot
pressure
for
lightweight
fabrics.
(see
page
21).
73
77


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