Dynatuner FMX-3 Istruzioni per il montaggio Operazione di allineamento - Pagina 4

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4 ( ) Snip off at the socket, all of the wires connected to
the
tuning
eye socket VB. Snip off
all
wires con-
nected to the volume control. Set the front panel
aside. Remove the tuning dial disc to prevent break-
age. Remove V6 and V7 for convenience in making
future connections.
5 (
Remove the tuning eye socket V8 from the front
panel. Save the hardware.
6 (
Remove the volume control from the front panel.
Save the
%"
lockwasher, and the
%"
nut which was
removed in step #2.
7( ) Remove the seven wires which are connected to eye-
lets
h25,
#26, #28, #30, #36, #37 and #38. Heat the
eyelets from below and withdraw the wires from the
top.
8 ( ) Remove the following four parts from the PC-8
board, checking with the pictorial diagram for loca-
tion: R20 (blue-gray-yelJow); R30 (brown-black
orange); R35 (blue-gray-orange); C28
(.0075
disc
capaci tor). These should bc removed by pulling
gently on the component with a pilir of pliers as
each lead is heated from the other side of the board
with
a soldering iron. Clear the hole of solder by
sweeping away the solder with the tip of the iron,
after wiping the tip of the iron clean. Do this quickly
with very light pressure to avoid excessively heating
the board. Propping the tuner up with books will
make the removal of these components simpler.
9( ) Mount the tuning eye socket V8M (with mounting
flange), on the front panel with two sets of #4 hard-
ware. Note that it is now installed with the blank
space between pins #1 and #9 at the top of the panel.
1O( ) Place the
%"
lockwasher on the shaft of the dual
volume control and insert the control into its hole
in the front panel. Locate the lugs as shown in the
pictorial diagram. Fasten loosely with the
Ye"
nut.
11 ( ) In the location marked R20 on PC-8, insert a
100,000 ohm (brown-black-yellow) resistor R20M.
Solder both leads and snip oft· the excess close to the
bottom of the board.
.
12 ( ) In the location marked R35, insert an 18,000 ohm
(brown-gray-orange) resistor R35M. Solder both
leads and snip off the excess.
13 ( ) In the location marked C28, install resistor R39M.
This resistor is 22,000 ohms
(red-red-orange) .
Squeeze the leads together to fit the present hole
spacing. Soldel' both leads and snip off the excess.
14 ( ) Refer to Detail A, and make the
"piggy-back" combination of the 470
mmfd capacitor C41M and the 22,000
ohm (red-red-orange) resistor R30M.
Solder. This combination is installed
in the location marked R30. Solder
both leads and cut off the excess.
15 ( ) Strip
114"
from the ends of the black
DETAll"A"
and green twisted pair of wires which
protrude from the small slot in the front of the
chassis. Connect the black wire to pin #4 of the
socket V8M (S). Connect the green wire to pin #5
of socket V8M (S).
16( ) Cut a
3/1
black wire. Strip one end
%",
and feed it
through pin #3 and connect it to pin
hI
of socket
V8M. Solder both pins. Position this wire under the
right-angled mounting bracket for V8M and close to
the front panel.
17 ( ) Connect one end of an 8
1
12"
red wire to pin #6 of
socket V8M (S). Feed the other end through the
small slot in the front of the chassis.
18 ( ) Connect one end of an 8" grf>en wire to pin #7 of
socket V8M (S). Feed the other cnd through the
slot in the chassis.
19 (
Connect one end of a
3"
red wire to pin #8 of socket
V8M (S).
20 (
Connect one end of a 3
1
12"
green wire to pin #9 of
socket V8M
(S). Position this wire under the
bracket and close to the front panel.
21 ( ) Connect one end of a 3" red wire to eyelet h30 on
PC-8 (S). When soldering to an eyelet on the board,
tin the wire with solder first, and then insert the
wire from above as the eyeld is heated from below.
Make certain that the eyelet is soldered to the
board as well as to the wire lead. Do not allow any
bare wire to show above the board, as it could short
to the volwne control.
22 ( ) Cut a 3
1
12"
black wire. Strip one end
3/1"
and feed
it through lug #l of the volume control and connect
it to lug #4 of the control.
23 (
Connect one end of an 8" black wire to lug #1 of
the volume control (S).
24 (
Connect one end of an 8" red wire to lug #2 of the
volume control (S).
25 (
Connect one end of a 6" red wire to lug #3 of the
volume control (S) .
26(
Connect onc end of an 8" black wire and one end of
a 5" black wirc to lug #4 of the volume control (S).
27 (
Connect one end of an 8" green wire to lug #5 of
the volume control (S).
2R (
Connect one end of a 5" green wi re to lug #6 of the
volume control (S).
29 (
Position the red wire from eyelet #30 down between
the resistors near it and towards socket V6.
30(
Slide the tuning dial indicator disc fully onto the
tuning capacitor shaft. The hub goes on the shaft
first, and its flat side engages the flat section of the
brass shaft.
31 (
Mount the front panel to the chassis using three sets
of #4 hardware.
32 (
Connect the red wire from pin #8 of socket V8M to
eyelet #28 (S). On this, and all future connections
to eyelets on the board, make sure that the eyelets
are soldered to the board as well as to the wires.
33 (
Connect the black wire from pin #3 of socket V8M
to eyelet #25 (S).
34 (
Connect the green wire from pin #9 of socket V8M
to eyelet
h26
(S).
35(
Connect the red wire from eyelet 830 (below the
volume control) to pin #2 of socket V8M (S).
Access to pin
h2
can be gained through the front
panel cutout.
36( ) Connect the short black wire from lug #1 of the
volume control
to
eyelet #37 (S).
3