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Fig.45
6-5.
lf
can
not
adjust
the
voltage.
replace
the
left
position
sensor
board
assembly
with
a
new one.
6-6.
Check
the
voltage
of
the
check
pin
(CH401)
by
referring
to
the item
5-5,
-
5-9.
6-7.
Set
all the
pattern variation
switches
to the
lower position
and
put
the
reference
mark
on
the
center
of
the
L
carriage
(Fiq.
a6).
Pass
the
sensor magnet
of the L
carriage
in front of the left
position
sensor, and move
the
L carriage
until
the
reference
mark
of
it
comes
to
the
green
4
needle and operate
it
across
and back between
the yellow 4
needle
and
green
4
needle.
The mark
sensor
is
moved
when
operating
the L
carriage
slowly
to
the
other
side.
When
the
mark
sensor is
moved,
the
reference
mark of
the
L
carriage must
be
placed on
the
green
1 needle.
The
mark
sensor
must
be moved
while the
reference
mark
of
the L
carriage
moving
between
the
inside
of
the yellow 1
needle and
green
2
needle.
(Fig. 46).
lf
the
mark
sensor
is moved outside (rightside)
of
those
needles.
re-adjust
the
voltage
of
the
check
pin
(CH401)
by
turning the
variable
resister
(vR401).
1. lf
the
mark
sensor
is
moved
outside (rightside)
of
the
green
2 needle,
raise
the
voltage
of
the
check
pin
(CH401)
to 2.0V
gradually.
After
adjusting
the
voltage. check
the
position
were
the
mark
sensor
is
moved
by operating the item
6-8, and
6-9.
lf
the
mark
sensor is
not
moved at
the correct position
even
if
the
voltage
of
the
check
pin
(CH401) is
raised
to
2.0V,
adjust the mounting position
of
the
left
position
sensor
board
assembly.
Slide
it
to
the
left
and move backward, and
then mount
it
securely.
2.
lf
the mark
sensor is
moved
outside (leftside) of the
yellow
1
needle,
lower
the
voltage
the
check
pin
(CH401)
to
1.6V
gradually.
lf
the
mark
sensor
is
not
moved at
the correct position
even
if
the
voltage
of
the check
pin
(CH401)
is
lower
to
1.6V
adjust
the mounting position
of
the
left
position
sensor.
Slide
it
the right
and move
forward,
and
then
mount
it
securely.
6-10.
After
raising
the
voltage
of
the
check
pin
(CH401), check
the following
points.
1.
Set
the
change
knob
to the
position
"N.L."
and
place
the
K
carriage
in
front
of
the left
position
sensor.
6-8,
6-9.
er
8l
ffi
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er
At
Ai
At
'{l
8i
qi
ffi
nl
A1
m
ffi
{\e
*i
&l
8l
at
6*
8i
A1
ffi
as
a
ni
na
a
AT
ffi
a
At
e-t
At
eg
Ai
Ai
A1
<a
a-t
,a
4a!
aa
a
A1
A1
At
a
*1
AI
gi
Ai
a
A!
lli
<1
aa
m
*
A-t
q1
ara
Ai
*
Reference mark
Fig.46
-24
-
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