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PROBLEM
PROBABLE
CAUSE
CORRECTION
The
material
Upper
or
lower
thread
tension
too
tight
P.12,
P.20
puckers
Stitch
too
long
for
material
P18
Thread
too
thick
P16
Incorrect
threading
of
upper
or
lower
thread
P.1
3,
P.1
1
Breaking
needle
Needle
not
correctly
inserted
P.
6
Needle
bent
P.
6
Needle
clamp
screw
too
loose
P.
6
Upper
thread
tension
too tight
P.20
Needle
too
fine
for
the
material
P.1
6
Dials
have
been
changed
while
the
needle
P.18,
P.22
was
down
in
the
material
Zigzag
width
set
more
than
2.5
while
twin
P.14
needle
was
attached
trouble
is
still
apparent
in
the
machine,
please
consult
your
nearest
dealer.
D
not
try
to
correct
fault
by
yourself.
N
Changing
Light
Bulb
Unplug
the
machine.
Open
face
cover
as
shown.
Remove
bulb
by
unscrewing
it
in
counterclockwise.
Install
a
new
bulb
by
screwing
it
in
clockwise.
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