Specifications
41
(vf
Twist
together a
pair
of green
and
black wires,
each
2%"
long. Connect one
end
of
the
black wire to
lug
#1
of terminal
strip
T8-2;
connect
the
other
end
to
pin
#5
of V-6
(8-2).
Connect one
end
of the
green wire to lug
#2
of T8-2'. Connect
the
other
end
Jof
the
green wire to
pin
#4
of V-6
(8-2).
42 (
~
Twist
together a
pair
of green
and
bla<;k
wires,
each
10%"
long. Connect one
end
of
the
black-wire to
eyelet
#9
on
PC-11
(8).
Connect
the
same
end
of
the
green wire to
eyelet
#10
on
PC-ll
(8).
Connect
the
other
end
of
the
black wire to lug # 1 of
tenninal
strip
T8-2. Connect
the
other
end
of
the
green wire
j to lug
#2
of T8-2.
43 (.,J)
Twist
together a
pair
of black
and
green wires, each
3"
long.
Connect
one
end
of the black wire to
eyelet
#3
on
the
front
PC-lO
(8).
Connect
the
same
end
of
the
green wire to
eyelet
#4
on
the front PC-lO
(8).
Connect the
other
end
of the black wire to
pin
# 5 of V
-7.
Connect the
other
end
of
the
green wire
j!!
pin
#4
of V-7.
44 (
V!wist
together a
pair
of black
and
green wires, each
2%"
long. Connect one
end
of the black wire
to
pin
# 5 of V
-7
(8-2).
Connect
the
same
end
of
the
green
wire to
pin
#4
of V-7
(8-2).
Connect the
other
end
of
the
black wire to
pin
# 5 of V-8,
and
the
other
end
of
the
green wire
to
pin
# 4 of V
-8.
45(Vf'Twist
together a
pair
of green
and
black wires, each
3"
long. Connect one
end
of
the
black wire to lug
#4
of
tenninal
strip
T8-2. Connect the same
end
of
the
green wire
to
lug
#5
of T8-2.
Connect
the
other
end
of
the
black wire to
pin
#5
of V-8
(8-2).
Con-
nect
the remaining
end
of
the
green wire
to
pin
#4
/!.f V-8
(8-2).
46
(1'>
Twist
together a
pair
of green
and
black wires each
12" long. Connect
one
end
of
the
black wire to eye-
let
#15
on
PC-11
(8).
Connect the
same
end
of
the
green wire to
eyelet
# 13
on
PC-11
(8).
Connect
the
other
end
of
the
black wire to lug
#4
of
tenninal
strip
T8-2.
Connect
the
remaining
end
of
the
green
wire
to
lug # 5 of T8-2.
WIRING
TO
THE
PC-11 CIRCUIT BOARD
The
following wires
are
all
to be connected from
the
top
of
the
PC-11 preamplifier circuit board to
the
selector
switch.
To
make
the
wiring to
the
selector switch easier
when
it
is
done
later
in
the
assembly process,
the
wires
are
connected
to
the
circuit
board
now.
The
pictorial dia-
gram shows exactly which wires
are
connected
to
each
of
the
eyelets.
Insert
the
wires from the top,
and
solder
the
wires
in
place
by
heating
the
eyelets from below
the
board,
while
checkin~
the
eyelet
numbers to be
sure
that
they have
been
inserted
in
the
proper
eyelets.
\
LENGTH
COLOR
EYELET
1(
Vl
1%"
red
#16
2('£{
2"
red
#17
3(
2%"
red
#14
4(0
1%"
red
#19
5(a
4"
red I
#20
6(
5
H
black
#5.
7(~
1%"
green
#2
8('
4"
green
#3
9(
~
51,4"
black
#1
10(~
1%"
green
#8
H(
2%"
green
#11
12(
)
2"
green
#7'
14
FINAL
ASSEMBLY
The
top of
the
selector switch
is
marked
with a red dot.
With
the
shaft pointing toward you,
and
the
dot
at
the
top,
a locating lug
protrudes
from
the
left front.
The
pictori
diagram shows the
tenninal
numbers,
and
identifies
th
wafers
as
A
(front)
and
B
(rear).
Whenever
a
terminal
location has separate lugs
on
the
front
and
back
of
the
wafer, be
sure
you
solder each wire to
both
lugs.
1
(n
Connect one lead of a 1.5 megohm (brown-green-
green) resistor to selector switch lug B-2. Connect
the
other
lead to lug B-5. .
2
(Y5
Connect one lead of a 3.3
nf
capacitor
to
selector
switch lug B-5
(8-2).
Connect
the
other
lead to
lug B-2.
3
(VConnec1
one
lead of
the'
other
1.5 megohm (brown-
green-green) resistor to selector switch lug A-2.
"connect
the
other
lead to lug A-5.
4
(v'fConnect
one
lead
of
a.
3.3
nf
capacitor to selector
switch lug A-5
(8-2).
Connect
the
other
lead to
lug A-2.
5("-'r"Attach
the
front
panel
sub-assembly to the main
chassis with four
sheet
metal screws, using two
on
each
side
in
the
holes provided.
Note
that
all
but
the
two wires from
the
stereo-mono switch
pass
under
the
chassis.
6
(\If Carefully install the selector switch
on
the
front
panel
as
shown
in
the
pictorial diagram.
Place
a
%" lockwasher
on
the
bushing
at
the
front
of
the
switch,
insert
the
switch
in
the
hole providf'd
on
the
front
panel
and
rotate
it
so
that
the
red
dot
which
indicates
the
top of
the
switch
is
toward
the
top
of
the panel.
In
this position
the
locating lug
on
the
front of
the
switch should engage
the
small hole
in
the
front panel.
Fasten
the
switch securely
in
plac
with a
%"
nut.
7(
~Connect
the
red
wire from
eyelet
#16
on
the pc-n
circuit board to lug A-7
on
the
selector switch
(8).
B(
if
Connect
the
red
wire from eyelet
#17
on
the
PC-11
circuit
board
to
lug A-9
on
the
selector switch
(8).
9 (
lI"I
Connect
the
red
wire 'from
eyelet
# 19 to lug
>-J;.
(8).
lOvP0sition
the
black wire from
eyelet
#5
over to
the
red
wire from
eyelet
# 20
and
twist
them
together.
Position
the
twisted
pair
in
front of selector switch
wafer A (between the wafer
and
the front flange of
the
main
chassis).
Connect
the
red
wire to lug A-4
(8).
Connect
the
black wire to lug A-3
(8).
11
(~onnect
the
red
wire from
eyelet
#14
to lug
A-2
(8-3).
'
12
C0
Connect
the
green wire from eyelet # 8 to lug
B-7
(8).
13 ( lIIf
Connect
the green wire from
eyelet
# 7 to lug
B-9
(8).
14(
~
Connect
the
green wire from
eyelet
#2
to
lug?
fi-6
(8).
15 (
"'1'
Position
the
black wire from
eyelet
#
lover
to
the
green wire from
eyelet
#3
and
twist them together.
Position
the
twisted
pair
in
front of selector switch
wafer B (between wafers B
and
A,
but
close
to
B).
Connect
the
green wire to lug B-4
(8).
Connect
the
black wire to B-3
(8).
16
C,j)
Connect
the
green wire from
eyelet
# 11 to
lu
B-2
(8-3).
17
(\l'.Connect
the
red wire from
the
stereo-mono switch •
to lug
A-l.
-