Pfaff hobbylock 4870 Owner's Manual - Page 85

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Page 85 highlights

Problem Cause The machine does not operate although the main switch is switched on. The electric power has been cut. Solution Close the looper cover (see page 12). The fabric is not trimmed neatly. Gathering of the seam. . Lint between the upper and lower knife. The lower knife is blunt. Clean the knife (see page 81). Change lower knife (see page 79). The thread tension is too tight. The differential feed is incorrectly set. The thread is incorrectly thread and has got caught Reduce thread tension (particularly for light fabrics see page 42 - 47). Correct differential feed (see page 27, 28). Thread correctly (see page 13 - 21). 83

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Problem
Cause
Solution
The
machine
does
The
electric
power
has
Close
the
looper
cover
not
operate
although
been
cut.
(see
page
12).
the
main
switch
is
switched
on.
The
fabric
is
not
Lint
between
the
upper
Clean
the
knife
trimmed
neatly.
and
lower
knife.
(see
page
81).
The
lower
knife
is
blunt.
Change
lower
knife
(see
page
79).
Gathering
of
the
The
thread
tension
is
Reduce
thread
tension
seam.
too
tight.
(particularly
for
light
fabrics
see
page
42
47).
The
differential
feed
is
Correct
differential
feed
incorrectly
set.
(see
page
27,
28).
.
The
thread
is
incorrectly
Thread
correctly
thread
and
has
got
caught
(see
page
13
21).
83