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5-3.
lf
it
does
not
show
the
above voltage,
adj
ust
the
voltage
to
1
.8V
by
tu
rn
i
ng
the
variable resister
(VR301).
Turn the
variable resister,
clockwise
raise
the voltage.
(Fig. 39).
Fig.39
5-4.
lf
you
can
not
adjust
the
voltage,
replace
the
encoder board
assembly
with
a
new
one.
5-5.
Place
the
sensor
magnet
of the
L carriage
in
front
of
the right position
sensor.
The
indicator
of
the
tester show
less
than 0.4V.
lf
not,
check
the
sensor
magnet
of the
L
carriage.
lf it
is
broken
off,
replace
the
release
button
with
a
new
one.
5-6.
Set
the
change
knob
of the
K
carriage
to
position
"N.L."
and
place
the
sensor
magnet
in
front
of
the
right
position
sensor
and
then,
check the voltage
of the
check
pin
(CH301).
It
must be
less
than 2.7V.
5-7.
lf it
is more than 2.7Y,
check
the
movement
of
the
sensor magnet by
changing
the position
of
the
change
knob.
5-8.
Set
the
tester
to
the DCV
1
0
range.
Set
the
change
knob
to
position
"KC(l)"
and
place
the
sensor
magnet
of
the
K carriage
in
front
of
the
right
position
sensor.
5-9.
The voltage
of
the
check
pin
(CH301)
is
more
than 3.4V.
lf
not.
check
the
sensor
magnet
of the
K
carriage.
lf it
is
broken
off,
repalce
it
with
a
new one.
5-10.
Set
all the
pattern variation
switches
to
the lower position
and
remove
the
sinker plate
assembly
frbm the K
carriage,
then
put
reference
mark on the
center
of
the
MC cam
button.
(Fig. 40).
Fis.40
5-11. Set
the
change
knob
to
position
"KC(l)" or "KC(ll)"
and
pass
the
sensor
magnet
in
front
of the
right
position
sensor.
Move
the
K
carriage
until the
reference
mark
comes
to
the yellow
4
needle,
and
then
operate
it
across
and
back between
the yellow 4
needle
and
green
4
needle.
5-12. The mark
sensor
is
moved
when operating
the
K carriage
slowly
to
the other
side.
When
the
mark
sensor
is
moved,
the
reference
mark
of
the
MC cam
button
must be placed on
the
green
1 needle.
The mark
sensor
must
be moved
while
the
reference
mark
of the
K
carriage
is moving
the
inside
of
the yellow
1 needle
and
the
green
2
needle.
(Fig.41).
lf
the
mark
sensor
is
moved
outside
of
these
needles,
re-adjust
the
voltage
of
the
check
pin
(CH301).
Fig.
41
1. lf
the mark
sensor is
moved
outside (leftside)
of
the
yellow
1
needle,
lower
the
voltage
of
the
check
pin
(CH301)
to the
1.6V
gradually.
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Y2
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