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Heathkit IO-4205 - Page 50

Heathkit IO-4205
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Page
48
Refer
to
Pictorial 2-12 for
the
following steps.
( ) Prepare
the
following wires:
8"
Org
6-1/2" Wht-Blk
6-1/2" Viol
6-1/2" Wht-Blu
4-1/2" Blk
8"
Red
7-1/2" Wht-Viol
9-1/2" Wht-Yel
9-1/2" Wht-Gry
Connect only one
end
of
each
of
the
following
wires
to
the
horizontal circuit
board
.
Their
free
ends
will
be
connected
later.
8"
Org
wire
to
hole
K (S-1).
6-1/2" Wht-Blk
wire
to
hole
L (S-1).
(
./)
6-1/2" Viol
wire
to
hole
AA
(S-1).
(
;;
6-1/2" Wht-Blu
wire
to
hole
BB
(S-1).
(
/(
4-1/2" Blk
wire
to
hole(~)
ground
(S-1).
(J )
8"
Red
wire
to
hole
B (S-1).
( j ) 7-1/2" Wht-Viol
wire
to
hole
N (S-1).
(
~
9-1/2" Wht-Yel
wire
to
hole
C (S-1).
(
1'9-1/2"
Wht-Gry
wire
to
hole
A (S-1).
( ) Prepare
the
following wires:
7"
Wht-Brn
8"
Wht-Grn
9"
Brn
8-1/2" Yel
12" Grn
12" Wht-Org
12" Wht-Red
12"
Wht
10" Blu
9-1/2" Gry
Connect
only
one
end
of
each
of
the
following
wires
to
the
horizontal
circuit
board.
Their
free
ends
will
be
connected
later.
8"
Wht-Grn
wire
to
hole
P (S-1).
7"
Wht-Brn
wire
to
hole
Q (S-1).
9"
Brn
wire
to
hole
EXT (S-1).
~
)
8-1/2" Yel
wire
to
hole
R (S-1).
Jil
ij
II II
1 I I I
Q .5 1
(CM)
2
(INCHES)
I I I I
Ill
3
e
I I
3
0 I 0 I 0
I I I
8
12"
Grn
wire
to
hole
E (S-1).
12" Wht-Org
wire
to
hole
F (S-1).
12" Wht-Red
wire
to
holeD
(S-1).
12"
Wht
wire
to
hole G (S-1).
Remove
an
extra 1/2" of
insulation
from
only
one
end
(total 3/4") of
the
remaining
blue
and
gray
prepared
wires. Pass
the
longer
bared
end
of each
wire
through
the
ferrite
bead
in
the
next
two
steps.
Connect
only
one
end
of
the
two
following wires to
the
foil
side
of
the
horizontal
circuit
board.
Their
free
ends
will
be
connected
later.
10" Blu
wire
with
a long ferrite
bead
to hole
X2
(S-1).
9-1/2" Gry
wire
with
a long ferrite
bead
to hole
Xl
(S-1).
CIRCUIT BOARD CHECKOUT
Carefully
inspect
the
circuit
board
for
the
following
conditions.
Unsoldered
connections
.
Poor
solder
connections.
Solder
bridges
between
foil
patterns
.
Protruding
leads
which
could
touch
together.
Transistors
for
the
proper
type
and
installation
.
Electrolytic capacitors for
the
correct
position
of
the
positive (
+)
end.
( ) Diodes for
the
proper
type
and
the
correct posi-
tion
of
the
banded
end.
( ) IC's for
the
proper
type
and
installation.
There
are a
number
of
unused
holes
in
the
circuit
board
that
will
be
used
later.
Set
the
circuit
board
aside
temporarily.
Save
the
remaining
parts
for
use
later. J
~
4 5
6
~
j
1
1
I I
1
I 1
1
~
I,
,
1
1
,,
I
1
1
,.
\ ,
,1
,
1
I 1
1
, J ,
1
1
1
1
I
9
10
11 1'2
13
14
1~
HS
11

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