Aries Ar323 User manual

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AR323

Pjiai

Mixer

Assembly

page

1

of

5

27

Oct

75

*

ARIES

System

300

Music

Synthesizer

Module

AR

323

Dual

Mixer

Assembly

Instructions

The

were

written

as a

general

ftiiide,

to

familiarize

the

builder

with

the

components.

Here,

now,

are

the

specific

assembly

instructions

for

building

your

Mixer.

It

is

recommended

that

you

do

the

following

before

you

proceed;

Find

a

place

where

you

can

work

through

completion,

without

disturbing

your

set-up.

Use

adequate

lighting,

Wash

your

hands

before

starting.

This

removes

contaminating

oils

and

perspiration

and

makes

assembly

more

comfortable.

As

you

proceed,

check

off

each

step

with

a

pencil.

1.

Preparation

Lay

the

circuit

board

down

on

a

sheet

of

white

paper.

PLACE

METAL

SIDE

DOWN!

Turn

board

so

that

connector

strip

is

to

the

left.

Lay

the

assembly

drawing

down

near

the

board.

Unpack

the

parts

carefully

and

place

in

a

large

box

or

tray

so

they

won't

get

lost*

Have

the

following

tools

nearby:

Pencil

tip

soldering

iron,

hot

and

tinned

(solder

coated)

Solder—Use

only

thin

rosin

core

solder!

Small,

diagonal

wire

cutters

Small

wire

strippers

Small

long-nose

pliers

Regular

pliers

Flat

blade

screw

driver

2.

Jumpers

Find

jumper

Jl

on

the

drawing.

Measure

Jl

on

the

PC

board.

Cut

a

piece

of

insulated

wire

one

inch

longer

than

Jl

measures

on

the

PC

Board.

Strip

1/2

inch of

insulation

from

each

end

being

careful

not

to

damage

the

wire

itself

/

Bend

the

bare

ends

to

a

right

angle

and

insert

into

the

holes

on

the

board,

according

to

the

drawing.

While

holding

the

ends

down

against

the

board,

bend

them

at a

^5

degree

angle

on

the

foil

side

of

the

board

to

hold

the

wire

in

place.

Solder

and

cut off

the

excess.

(Refer

to

introduction

on

parts

installation.)

Install

J2

in

the

same

way.

3.

Resistors

Carefully

install

all

22

resistors

on

the

circuit

board

(Rl

through

R22).

R23

through

R26

will

later

be

mounted

on

the

panel.

To

avoid

breaking

the

resistor

leads,

bend

the

leads

at

least

1/16

of

an

inch

away

from

the

body

of

the

resistor.

For

example:

.

^

C

orrec

t

I

nc

orrec

t

~~

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°

h^

/

AR323

Mixer

Assembly

p

2

of

>.

Capacitors

Install

all

Ik

capacitors

on

the

board,

(Cl

through

C14)

5.

Integrated

Circuit

Amplifiers

Install

all

6

Integrated

Circuit

Amplifiers

on the

board.

(Ai

through

A6)

MODULE

ASSEMBLY—

Please

refer

to

Module

Assembly

Drawing

1.

Unpack

the

frame,

bag

of

hardware,

and

front

panel.

(\y

2.

Snap

the

two

plastic

card

guides

into

the

holes

in

the

frame.

Be

sure

that

the

pairs

of

tabs

in

the

guides

which

hold

the

board

point

toward

the

rear

of

the

frame.

(The

bottom

one

is

shown

installed

in

the

drawing.,)

Slide

the

circuit

board

into

the

frame,

holding

the

top

and

bottom

of

the

frame

together

against

the

board

so

that

the

board

fits

snugly

in

the

card

guides.

Be

sure

that

the

pairs

of

plastic

tabs

/

pinch

the

edge

of

the

circuit

board

properly.

(^)

4.

Using

4-40X3/8"

screws

and

nuts,

mount

the

.two

angle

brackets

to.the

frame

as

shown

in

the

drawing.

The

brackets

should

be

/

entirely

on

the

component

side

of

the

board.

n

(sj

5.

Now

screw

the

board

to

the

brackets.

Insert

the

4-40

X

3/8"

screw

from

the

foil

side

of

the

board.

DOUBLE

CHECK

THAT

THE

HEAD

OF

THE

SCREW

DOES

NOT

TOUCH

ANY

FOIL

11!

Unpack

the

front

panel

carefully*

Avoid

scratching

its

surface.

AT

THIS

POINT

you

may

if

you

wish

skip

steps

7-8

and

proceed

through

the

first

few

steps

in

the

panel

wiring

(those

in

which

wiring

is

done

between

components

on

the

panel,

but

not

to

the

board)

before

finishing

the

module

assembly.

Mount

the

top

of

the

panel

to

the

top

of

the

module

frame

usipg

the

top

two

potentiometers

as

follows:

If

there

are

tabs

sticking

up

parallel

to

the

shaft

on

the

pots,

bend

.

90

degrees

inward

out

of

the

way*

Put

the

locking

washer

on

the

pots*

Insert

the

pot

shafts

through

the

matching

3/8?t

holes

in

the

frame

and

the

top

of

the

panel.

Put

on

the

nuts

and

tighten

them

very

/snugly,

but

avoid

scratching

the

panel.

8*

Attach

the

bottom

of

the

panel

to

the

frame

using

the

remaining

4-40

screws

and

nuts.

(<)

9.

Install

the

other

pots

onto

the

panel.

(1)

s

10,

Install

all

12

mini-phone

jacks

as

shown

in

the

panel

drawing.

>

'

(vf

11.

Turn

all

pot shafts

fully

counterclockwise

and

mount

the

knobs

pointing

to

the

leftmost

number*

Tighten

knob

screws.

PANEL

WIRING—Refer

to

panel

wiring

diagram

and

board

assembly

drawing.

Run

an

insulated

wire

connecting

pins

1

of

all

four

pots

Pi

through

P*k

Rim

a

wire,now,

from

\Ax\

1

of P2

to

the

grounds

of

all

12

Jackr.,

ar,

shown.

Connect

a 100K

resistor

to

2

of

all

four

pots,

as

shown.

Sol

dor

an

Insulate:!

wire

to

the

unattached

end

of each

re:>.lsl.or

1/16

of

an

inch

away

from

the

body

of

the

resistor.

Run

the

wires

to

the

center

terminals

of

the

switches,

connecting

Pi

to

Sly

P2

to

S2f

P3

to

P3,

and

Fk

to

3k.

Run

an

insulated

wire

connecting

the

negative

terminals

of

Si

and

S?

together

and

from

there

to

the

appropriate

point

on the

board

labelled

"A-fl

nn

the

assembly

drawing.

Wire

the

positive

terminals

inthe

same

manner.

...

Wire

S3

and

Sk

as

you did

Si

and

S2

.,

/

5.

Connect

pins

3

of

all

four

pots

to

the

appropriate

point

on

the

,<_(

j

board

as

labelled

on

the

assembly

drawing.

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AR324

Dual

LFO

Assembly

p

/

(\j

6.

Wire

all

12

jacks

and

1

of

P2

to

the

appropriate

point

on

the

board

near

the

edge

connector

corresponding

with

the

letters

on

the

wiring

diagram.

THIS

COMPLETES

ASSEMBLY OF

YOUR

AR323

DUAL

MIXER.

There

is

no

calibration

or

test

procedure

required.

Your

AR

323

Dual

Mixer

is

now

ready

to

use0

(y

-rv

r-

■';■■-

•:'/!.-

G

\

;

r.-.

.

.»

v

O,,

,

-4.

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FRAME

SHORT

BRACKET

LONG

BRACKET

FRONT

PANEL

AR323

Dual

Mixer

Module

Assembly

Drawing

(D

H

CO

(A

o

'#

Ul

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AR3.23

Assembly

p

5

of

5

AR

323

DUAL

MIXER

PANE*I

WIHIM

151

AGRAM--rear

view

side

view

of

pot

r

o

Arrows

indicate

a

wire

to

the

PC

board.

All

wires

with

arrows

and

ground

bus

with

thick

lines

must

be

insulated.

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THEORY

OF

OPERATION

AR-323

DUAL

MIXER

Signals

from

inputs

A3

and

A4

are

mixed

by

Rl

and

R2

into

Alf

T;;hich

inverts

the

signals.

A2

re-inverts

the

signals

to

come

out

non-inverted

again,

Al

and

A2,

however,

are

first

controlled

in

level

(attenuated)

by

PI

and

P2f

and

switch

selected

^o

go

either

directly

into

A2,

in

which

case

they

come

out

iny/erted,

or

into

Al,

in

which

case

they come

out

non-inverted.

Mixer

B

works

the

same

way.Now,

A3

is

a

differential

^nplifier

which

mixes

the

outputs

of

mixer

A

and

mixer

B,

but

B'

is

inverted,

while

A

is

not.Thus,

the

output

is

A-B.

A6,

on

the

other

hand,

is

a

non-inverting

mixer^which

adds

the

two

outputs

from

A

and

B

to

give

A+B.

-

All

6

amplifiers

are

LM

301A

op

amps

with

feed-forward

compensation

(the

150

pf

capacitor)

for

good high

frequency

response.

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cw

HIGHEST

REFERENCE

DESIGNATION:

P4

R26

CI4

S4

U6

AR-323

DUAL

MIXER

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AR323

Dual

Mixer

parts,

p

1

of

1

PARTS

LIST

*

AR-323

*

DUAL

MIXER

NUMBER

QUANTITY'

DESCRIPTION

VALUE AND

RATINGS

v

/

y

v

y

Cl,3,5,8,10,12

PI,2,3,4

"

12^13^-14,18

19,20,

21,

23,24,26,27,28,29

R6,11,17,22

j-3

f

4

L

6

2

4

22

4

6

12

1

4

1

2

6

Capacitor,Disc

Potentiometer

Resistor

Switch,Toggle

Operational

Amplifier

Jack,Mini-Phone

Printed

Circuit

Board

Front

Panel

Knob

Frame

Brackets

(one

long,one

short)

P

C

Card

Guides

iead

Screw,

4-40

x

3/16"

Nut,4-40

150

pf

33

pf

0.1

mfd

at

50v

100k,

linear

100k,

5%

Ik,

10%

SPDT

LM301A

-rts

.it

board

(Rl

through

i

the

panel.

To

avoid

t

least

1/16

of

an

inch

Incorrect

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Aries AR323 User manual

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