Brother International MD-817 Service Manual - Page 71

Treadle

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Treadle unit Phot Int & VC chart 9.2 4000 t CP5 (VC) V SPM 2.2 1000 } 0.5 215 } -8 is -2 0 2 FRONT L H level 4.5V or more REAR L PRESSER H DOWN Trim Pres. up Neutral Pres. down 141 12 .5 1I6 STROKE (mm)-0- L level 0.5V or less Low sp Top Variable sp. sp. Adjustments Shutter 231079001 O1 Q2 O3 Shutter O1 Adjust the shutter position so that it uniformly makes contact with both Q2 and Q3 at neutral. Note: When the treadle is fully depressed, the edge A of the shutter must be within the left 1/3 of 01. Connector related 1) Connect only the power-supply connector of the external con- nectors. 2) For the internal connectors, remove only CN5 from the D printed-circuit board. 3) Making the above adjustments will set the machine speed to approximately 4000spm (105 pulley), so, in the condition after the adjustments are completed, use VR3 to set to maximum speed. - 67 -

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Treadle
unit
Phot
Int
&
VC
chart
FRONT
L
9.2
CP5
(VC)
V
2.2
}
0.5
—8
is
—2
REAR
L
PRESSER
H
DOWN
Adjustments
4000
t
1000
215
}
0
2
H
level
4.5V
or
more
SPM
L
level
0.5V
or
less
12
14
1
.5
1
I6
STROKE
(mm)
-0-
Trim
Pres.
up
Neutral
Shutter
231079001
Q2
O3
O1
Pres.
down
Adjust
the
shutter
position
so
that
it
uniformly
makes
contact
with
both
Q2
and
Q3
at
neutral.
Note:
When
the
treadle
is
fully
depressed,
the
edge
A
of
the
shutter
must
be
within
the
left
1/3
of
01.
Connector
related
1)
Connect
only
the
power
-supply
connector
of
the
external
con-
nectors.
2)
For
the
internal
connectors,
remove
only
CN5
from
the
D
printed
-circuit
board.
3)
Making
the
above
adjustments
will
set
the
machine
speed
to
approximately
4000spm
(105
pulley),
so,
in
the
condition
after
the
adjustments
are
completed,
use
VR3
to
set
to
maximum
speed.
Low
sp
Shutter
Variable
sp.
Top
sp.
O1
-
67
-