WIRING PC-44 AND CONTROL BRACKET
The next two steps will call for the connection of the
shielded audio cable. To prepare this cable for connection,
first remove 3/4" (2 cm) of the outer plastic insulation. Use
care doing this, so that you do not cut the fine strands of
wire underneath. With the insulation removed, draw the fine
"shield" wires to one side and twist them together. Then
remove the conventional 1/4
"
(.6 cm) of insulation from the
center wire, and also twist together these strands of wire.
Finally, "tin" the shield and the center strands with your
hot iron and a very small amount of solder to prevent
fraying.
1( ) Prepare both ends of a 12
1
/
2
" (31.5 cm) length of
shielded cable, as described in the above paragraph.
Connect the shield wire at one end to RCA input lug
#4 (S-2). Connect the corresponding center wire to
RCA input lug #3 (S-3). Be certain that no strands
of wire touch nearby
hardware
or other than the in-
tended lug. Feed the cable over all the other wires to
the front of the chassis, and then through hole G2.
The other end will be connected later.
In future steps connections will be made to plated-
through holes on the PC-44 circuit board. Insert the wire
in the hole so that bare wire is visible on
both
sides of the
board. Let the soldering iron contact the junction of wire
and board circuitry as you feed solder to the junction.
Solder should flow smoothly from the circuitry,
around the
hole
to completely surround the wire. Keep the wire steady
while the connection cools, and then wiggle it to make sure
the connection is secure. If in doubt, reheat the connection
and add more solder.
2( ) Select the PC-44 circuit board, and place it com-
ponents side down (foil pathway side toward you).
Connection will be easier if all 12 of the numbered,
solder-filled holes are cleaned out. Use a wood tooth-
pick and a hot iron.
3( ) Prepare both ends of a 4 1/2
"
(11 cm) length of
shielded cable, as described. Connect the center wire
at one end to PC-44 hole #4
from the components
side
and solder the wire on the other (foil pathway)
side. [Hole #4 is partially hidden by a resistor.]
Connect the corresponding shield wire to PC-44 hole
#3 from the components side, and solder the wire on
the foil side. Feed the cable through hole G2 in the
chassis from the inside. The other end will be con-
nected later.
4( ) select the "L" shaped control bracket assembly, the
four 1 1/8" #6 screws and
KEP
nuts, and the four 3/4"
spacers. Insert two of the screws first through the
bracket assembly from inside the bend, and mount
the bracket over the two front holes from outside the
chassis between the transformers so that the control
shafts face front. Insert spacers inside the chassis,
then install the properly oriented circuit board, and
loosely affix with
KEP
nuts. Insert the other two
screws through the chassis, install spacers inside,
followed by the circuit board, and the
KEP
nuts. Now
tighten all the hardware.
You will now connect the free ends of many of the wires
fed through chassis holes G1, G2, and G3 to the controls
BC and LC, and the switch MS on the bracket assembly.
For access, place the chassis so the front edge is flat on the
work surface, and the transformers point toward you. Refer
to the accompanying sketch for connection of these parts.
5( ) Select the straight black wire from chassis hole
G3
and connect it to BC lug #3 (S). (Ignore the black
wire which has been twisted with the violet-white
wire.)
6( ) Select the yellow wire from hole
G3,
and connect it
to BC lug #2 (S).
7( ) Select the black wire
with a hook bent in it
from
chassis hole G3 and connect it to BC lug #1 (S).
8( ) Select the shielded cable which has been connected
to the RCA input socket and is fed through hole G2.
Do not confuse this with the shielded cable con-
nected to PC-44, which will be called for in the next
step. Connect the center wire to LC lug #5 (S).
Connect the shield wire to LC lug #6.
9( ) Select the shielded cable which has been connected
to PC-44 and is also fed through hole G2. Connect
the center wire to LC lug #4 (S). Connect the
shield wire to LC lug #6 (S-2).
10 ( ) Select the yellow wire from hole G1, and connect it
to MS lug #4.
11 ( ) Select the remaining 5600 ohm,
1/2
watt resistor
(green-blue-red), bend its leads 90° to its body, and
cut its leads to
1/2
"
(1.3 cm) each. Connect one lead
to MS lug #4 (S-2). Connect the other lead to MS
lug #3. Position this resistor across the back of MS,
but do not permit a resistor lead to touch any metal
portion of the switch.
NOTE: If the alternate (Japanese) unit has been supplied, se-
lect instead the remaining 7500 ohm, 1/2 watt resistor (violet-
green-red), and install the part as indicated above.
12 ( ) Select the 12,000 ohm,
1/2
watt resistor (brown-red-
orange), bend its leads 90° to its body, and cut its
leads to
1/2
"
(1.3 cm) each. Connect one lead to
MS lug #3 (S-2). Connect the other lead to MS
lug #2 (S). Also position this resistor across the
back of MS.
NOTE: If the alternate (Japanese) unit has been supplied,
select instead the 15,000 ohm, 1/2
watt resistor (brown-green-
orange), and install the part as indicated above.
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