White 8000 - Trouble Chart

29.
TROUBLE CHART
Trouble
F
Probable
Cause
Correct
• Operation
Not plugged n
proper
y
Page
4
Macf rn
Power supply switch s
not on
4
does
QT
sow
Thread is stuck in
the hook groove
Lack of oi
43
Makir
g
no
se
Dust of thread jamming
the rotary
hook
42
Rur
rang
ow
Dust
of thread jamming the
feed
dog
42
Thread
s
stuck ir the
hook goove.
42
Improper
threading.
11
Upper thread
tension too
tight.
18
Needle
bent or blunt
Breakir
g
Improper needle
setting.
upper
tt
reao
Removing
fabric when take
up lever
is not
in
the
higtest position.
Upper thread too
thick
or
too
thin
for need
e
used
Improper threading
Breakir
Lower thread tension too tight
ower thread
Dust of thread
jamming the bobbin
case or
around
the spring of the bobbin case.
Improper needle setting
9
Skrpp
ng
Needle
bent
9
stitches Improper needle and
thread for the fabr c
9
Improper upper tkread
ng.
11
L
Too ri
uch
o
I
j
43J
44