Chassis Wiring - Heathkit SW-717 Assembly

#6 TOCKWASHER
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#8
PTAIN
SOLDER
LU3
6-32
NUT
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#6
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PICTORIAL
13
Refer
to
Pictorial
13
for the
following
steps.
( )
Cut
a 1"
length
of
double-adhesive
tape
from
the
1-foot length furnished. Lay
this piece
aside
for
use
later.
NOTE:
When
the circuit
board
is
mounted,
lockwashers
must be installed between
the
chassis
and
the
foil
side
of
the
circuit
board. This
assures
a
good
ground
between
the
circuit
board and
the
chassis.
This
operation
can
be
simplified
if
you
place
a
1-112" piece
of
tape over
each
screw head
after
the
screws
are
placed in the
holes
from the
lettered side
of
the
circuit
board. The tape
will
hold the
screws
in place
until
lockwashers
and nuts are installed.
The tape furnished
has
adhesive
with a protective covering
on
each
side.
Remove
the
covering
from
one side
only
when you
tape the
screw
heads.
( )
Cut
six
1'1
12" lengths
of
tape.
( )
Mount
the circuit
board
on the
chassis.
(Position
the
board as shown
in
Plctorial 14.)
Use
6-32
x
318"
hardware. Tape
the screw heads
into place
with
the
1-1
12"
pieces
of
tape.
On the
lettered side
of
the
circuit board,
place a #6
solder
lug under
the
screw
head
at
BE.
At
BD
place a
#8 plain solder
lug
on the
screw instead
of a lockwasher. Then
raise
the circuit
board
into
place
and
secure
the
screws with
lockwashers
and nuts.
Do not
place nuts
or
lockwashers
on the
screws
at
BF
or
BS.
Tighten the
nuts
f
inger
tight
onlY'
( )
Install
a 6-lug
terminal strip on
circuit board mounting
screw BF. Position
the
mounting
foot
as
shown' Note
the lockwashers used.
( )
Place
a #6 solder lug and a 6-32
nut on the
screw at
BS.
Be
sure
to position the
solder lug
as
shown.
( )
Remclve
the
tape
from
the screw heads,
position
each
solder lug
as
shown
in the Pictorials,
and
tighten
each
mounting
screw
securely so
the lockwashers
will
bite
into the
circuit board
foil to form
a
good
connection
to
the
chassis.
NOTE:
In the
following step,
after you
raise
the
circuit
board
into place but
before
you
install the hardware
to
hold
CHASSIS Wl
RING
it, carefully
inspect
the
circuit board along
its lower edge
(as
shown
in the
pictorial) to
make sure
that
';;
J;.t;
Refer
to
Pictorial 14
for
the
following
steps'
connections contact the
chassis
edge.
lf
they
do, remelt the
solder and
clip the
leads as necessary
to
allow
the
circuit
NOTE: The metal braid furnished is actually
flattenec
board
to
lie flat
against
the
chassis,
Failure
to
do
this
may
tubular
braid;
the end
can
be
opened
up
by
inserting
the tip
result in
a
cracked
circuit
board. of
a
knife blade'