Heathkit SW-717 Assembly page 34

Pase34
@
()
At
end
A
(314"
end) connect
the
clear wire
to
lug
3
(S-1
),
the black wire
to
lug
2
(S-1
),and
the drain
wires
to
lug
1
(S-1
)
of
control B.
Make sure
the
control
solder lug remains soldered.
At
the other end
of
the cable,
connect the black wire
to
hole
K
{S-1
)
and
the
clear wire
to hole
BC (S-1
)
on
the circuit board. BC
is not
marked
on the circuit
board.
Prepare
a
16" black hookup wire.
Connect one end
of the black hookup wire
to
lug
1
of
switch
D
{S-1). Connect
the other end
of
this wire
to
hole
G on the circuit board
(S-1). Position the
wire
under the
chassis
lip.
Prepare a
15" blue and a
15"
black hookup wire.
Then
form
a
twisted
pair from
these
two
wires'
At
one end
of
this twisted pair, connect
the blue
wire
to
lug
3
(S-1)
and
the black
wire
to
lug
2 (NS) of
switch
D.
At
the other end
of the twisted
pair,
connect the black
wire
to
hole
F (S-1)
and
the
bluewireto
hole D
(S-1)
on the circuit board' Position
the twisted pair
under
the chassis
lip.
Cut
each
lead
of a
10 prF electrolytic capacitor
to
3/4".
Connect
the lead at
the
positive (+) end of
the
capacitor
to
lug 2
of switch D
(S-2). Connect
the other
lead
to
lug 11F
of wafer #1 of
switch C
(S-2).
Prepare
a 24"
white hookup
wire and
a 24"
blue
hookup wire. Then
form
a
twisted
pair
from
these
two
wires,
At
one end only
of
the twisted pair, cut
off
and
discard
2" of
white wire. Remove
114"
of
insulation
from the
cut
end.
Pass
this
end
of
the twisted pair
under
the
metal braid
coming
from
terminal
strip X' Then connect
the white
wire
to hole
A
{S-1)
and the
blue
wire
to
hole
O
(S-1)
on the
circuit
board.
()
()
(VERY THIN)
()
()
CUT
THE CABLE ACCORDING TO THT
DII\lTNSIONS
BELOW
PREPARE EACH TND
AS
SHOWN.
END
A
AT
THIS
END
TAKING
CARI
NOT
TO CUT THE OUTER
DRAIN
WIRES.
REI\'\OVE
THE OUTER INSULATION.
PEiL
OFF
OUT
THT
AND
RTI\'lOVT THE
FOIL AND
STRAIGHTEN
DRAIN
WIRES.
()
()
()
()
()
()
REMOVE
1/4'OF
INSULATION FROI\1
IACH
INNIR
WIRT.
TWIST THE
DRAIN WIRES TOGTTHER.
APPLY
SI\/1ALL
AMOUNTS OF
SOLDER
TO THT END OF THE
DRAIN WIRES
AND
THT INNER LTADS,.
SOLDTR
f_
AND SOLDTR
Detail 21A
Refer
to
Pictorial
21
(fold-out from
Page
32)
for
the
following
steps.
( )
Refer
to
Detail
21A
and
prepare
a
7'1
12" length
of
two-conductor shielded cable.
CAUTION: When
you
remove
the insulation
from the
ends
of the two
inner
wires, be
very
sure
you do not
pull the wire out of the
cable.
Grip the wire firmly
before removing the
insulation.
( ) At
the
ends
of
each
wire, twist the fine
strands
together
and
melt
a
small amount
of
solder
on
each'
Also
melt
a
small amount
of solder on
the
ends
of the
twisted drain wires.
-
DRAIN WIRTS
lt