Dynaco Dynakit DSC 1 Service Manual

Page 1

This number must be men-
tioned in all communica-
tions concerning Dynakit.

INSTRUCTIONS
FOR ASSEMBLY
OF DSC-l
DYNAKIT
STEREO CONTROL

Price 25¢

DYNA COMPANY m
PHILADELPHIA 4, PA.

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INSTRUCTIONS FOR ASSEMBLY OF DSC-l

The Dynakit Stereo Control (DSC-l) adds com-
plete stereo control functions to two Dynakit pre-
amplifiers (use with other types of equipment is
also possible as described later). The Dec-1
does not amplify or change the signal in any way.
it is completely distortionless and free from
noise. Its function is to add convenience and flex-

ibility to two monophonic systems so that every
desired stereo function is available from the mono-
phonic equipment. Thus complete compatahility is
offered for those who have monophonic systems and
wish to add stereophonic functions without having
to replace the existing system.

Assembly of the Dynakit Stereo Control is quite
simple and can be done by following either the step
by step directions or the pictorial layout. How-
ever, for greatest ease of assembly, it is re-
commended that both the step by step directions
and the pictorial be followed. one being used as a
check against the other. it is also suggested that
the instructions be read all the way through before
commencing construction.

Upon opening your kit. check the components with
the parts list. Familiarize yourself with the com-
ponents; they can be identified by comparison with
the pictorial diagram and by specified color coding.
Proper color coding will be mentioned for each re-
sistor as it is used.

Component leads should be trimmed as they are
used; the length should be such that the proper con-
nection can be made from point to point without
strain on lugs or components. Cars shouldbe exer-
cised not to allow wires to touch one another un-
less they are actually connected to the same point.

USE ROBIN CORE SOLDER ONLY - Do not use
acid core solder - itisinjurioustoelectronic com-
ponents and does not make satisfactory electrical
connections. Dyna Company assumes no responsi-
bility for the function of any kit in which acid core
solder is used. if you have solder on hand the origin
of which is doubtful it is wise to obtain new 50/50
or 60/40 rosin Core Solder.

Whenever a connection is made the instructions
will specify (8) if the joint ls'tobe soldered; other-
wise the leads should be crimped in place and left
unsoldered to be soldered at a later step. if good
soldering procedure is followed all that is needed
is an iron of 35 to 50 watt rating. When a soldering
iron of a higher rating is need. care must be taken
not to OVerheitt the components. Both the wire and
the lug to be connected should be clean and shiny.
The wire should first be stripped (the insulation re-
moved for about 1/4 inch) and then tinned by ap-
plying the hot iron to the bore portion of the wire
while simultaneously applying a small amount of
solder to the wire. The iron should heat the wire
enough to cause the solder to flow smoothly on the
wire. Note that the solder is applied to the work
and not the iron. Similar procedure is followedwhen
soldering a joint. The wire or pigtail lead from the

component is connected to the point by booking it
through the hole in the lug and crimping the hook
closed. The iron is applied to the joint to heat both
the lug and the wire. and then solder is applied to
the joint till a small amount flows smoome on the
joint. The iron is then removed and the joint allow-
ed to set at least 10 seconds. The joint should not
be disturbed while the solder is setting. and it
should set smooth and shiny. if the soldered con-
nection has a dull crackle finish. it is a cold"
joint and should be redone.

All the tools necessary for construction of this
kit are a small tip soldering iron. as medium size
screw driver. long nose pliers. and cutting pliers.

it takes very little time to construct this kit. so
go slowly and double check your work . . . . . . . .

MECHANICAL ASSEMBLY

1. ( ) Mount the four rubber feet in the holes in
the bottom of the chassis. insert the small
end from the outside with a twisting motion
until the foot seats snugly against the bottom
of the chassis.

2. ( ) Mount the three slide switches on the inside
of the front panel with '4 screws. Nuts are
not necessary as the holes in the switches
are threaded.

3. ( l Mount the dual volume control (each sec-
tion has four lugs). in the single hole be-
low the slide switches. Put a 3/8" lock-
washer on the shaft. insert control through
the hole and fasten from the outside with
a 3/8 nut. Orient the control with the three
lugs facing to the left as in the pictorial
(the single lug on each section faces to the

right).

4. ( j Mount the blend control (with switch on the
back). in the right hole above the slide
switches. Use a lockwasher on the shaft.
orient with three control lugs facing down.
and fasten with a 3/8 nut.

5. ( ) Mount the balance control in the remaining
hole. Use a lockwasher on the shaft and
orient with the lugs facing down. and
fasten with a 3/8 nut.

6. ()With M screws. nuts. and lockwashers
mount the pair of four socket connectors or
jacks on the inside of the rear chassis
panel. insert the screws from outside the
chassis and fasten on the inside with a
lockwasher and nut. Note that each jack has
both a long lug and a short lug. These will
be referred to in the connection instruc-
tions.

WIRING PROCEDURE

1. ( ) Connect a 3 wire to lug M ofthe dual vol-
ume control. Connect the other end to lug
05 of the loudness switch (8).

2. ( ) Connect one end of a 4" wire to lug 08 of
dual volume control. Connect the other end
to lug #2 of the loudness switch (8).