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Brother Electroknit KH-910 Service Manual page 34

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2.
White
parts
of
the pattern
card .
.
.
2.4V
(1.4V-3.0V)
3.
Blackpartsof
thepatterncard
.
...
lessthan
1.0V
The mark
sensor stops reading
after counting the 60
signals
(sampling
clock) of the
card guide
A.
The
output
voltage
of
the mark
sensor comes
down
to
3.0
V,
if
the
specular surface
of
the
card guide
A
is
dirty
or
some
dust sticks
to
the
face
of
it.
lf
the
pattern card
is
soiled
with
the coffee,
oil,
etc.,
the
voltage
of
the mark
sensor
gose
over and
/or
comes
down
from
the proper
levels.
They
will
cause
the incorrect
needle
selection.
lf
incorrect
needle
selection
apears
when
using
the
original pattern
card,
check
voltage
of the mark
sensor
and adlust
them
to
the proper
levels.
lf
the
level
of
them
is
not
within
the proper
levels.
lf
the
level
of
them
is
not
within
the
proper
range, re-draw
the
black parts
of
the
pattern.
XI.
CHECKING THE PATTERN
VARIATION
SWITCHES.
lf
there
are some
defects
on
the pattern variation
switches,
replace
the pattern
case
whole
unit
or the main
P.C.B.
assembly
with
a
new
one.
Pattern
variation switch
No.
4
(DOUBLE LENGTH)
and
No.
6
(NEGATIVE)
are
already checked
by item
lX
and X.
Set
the pattern variation switch which
will
be
checked
at the
upper
position
and
the
other
switches at
the lower position.
lf
the position
of
the
pattern selector switch and/or the
programming
are changed,
re-program
the
information
according
to
the
item
llX.
6.
Make
sure
that
the
set
line
of
the pattern
card
No.
1
is
set
at
the
card
inlet
and
push
the
CF key.
1).
Pattern
variation switch No.
1
(PATTERN A.REVERSE).
For
the first
row,
the following
needle are selected
to
position
D.
(And
for
every
odd row).
Y
(yellow)
.
. .
.
26,24, 18,16,
10,
8,
2.
G
(sreen)
.2,4,1O,12,18,20,26,28.
For
the
second
row, the
following
needles are
selected
to
position
D.
(And
for
every
even
row).
Y
(yellow)
.....
25,23,17,15,9,7,1.
G
(green)
1,3,9,
11
,
17
, 19,25,27.
2.
Pattern
variation switch No.
2
(PATTERN B
REVERSE).
*
Push
"1"
key
and
CF
key.
For the
first
and
for
every
odd row.
Y
(yellow)
....
29,27,21,19,'13, 11,5,3.
G(sreen).,..
.5,7,13,15,21,23,29.
For the
second
row
and
for
the
every even
row.
Y
(yellow)
30,28,22,20,
14,
'12,6,4.
G
(sreen)
6,8,
14,
16,22,24,30.
3.
Pattern
variation switch No.
3
(DOUBLE WIDTH)
Make
sure
that
the
ready
lamp
is on.
Set
the
pattern selector switch
to
the lowest position at
first,
and
then
re-set
it
to
the upper position,
(Full
pattern
-
pattern A).
Push
the M key continuously
until
the
step lamp No.
6
is
lit
up,
and check
if
the number in the display
is
yellow
8.
lf
the
number
in the
display is yellow
4,
the No.
3
pattern variation switch
does
not
work
correctly.
.G
ea
!a
ia
&
ia
ac
9A
&
ta
&
4A
tc
la
ta
8A
a
8R
8A
ffi
ta
ta
46t
ta
8R
a
ta
&
'G 8g
8R
8S
ER
qa
8A
ta
&
a
,a
&
aa
8R
8A
ta
ta
9A
ee
8A
8A
8A
!a
a
m
8R
8R
8R
,Ct
ta
&
8R
&
ta
&
ta
4A
ea
8R
AE
-33-

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