Paia 9308 Guide

FatMan

Analog

MIDI

Synth

Details

specific

to

the

installation

of

the

FatMan

circuit

board

in

the

9308C

Desk

Top

enclosure

are

covered

in

the

9308C

Supplement.

Follow

the

assembly

instructions

in

this

manual

until

instructed

to

reference

the

9308C

Supplement.

Model

9308

Assembly

and

Using

Manual

|

.

@O@->-

___

LIM

a

Fitch

‘el

Bole

It's

hard

to

beat

analog

synths

for

fat,

punchy

bass

lines.

And

for

discovering

new

sounds,

nothing

comes

close

to

real

knobs

operating

in

real

time.

The

FatMan

has

all

of

the

features

that

give

analog

it's

warm,

full

tone

in

a

MIDI

controlled

package.

The

classic

normalization

scheme

of

twin

VCO/

VCFNCA

and

Dual

Transient

Generators

is

brought

up

to

date

with

the

inclusion

of

Velocity

CV

not

available

on

pre-MIDI

synths.

FatMan

learns

from

the

past

by

including

features

that

were

eccentricities

of

classic

synths

such

as

a

unique

“punch"

switch

that

adds

a

subtle

but

useful

fifth

segment

to

the

standard

ADSR

response.

PAIA

Electronics,

Inc.

ASSEMBLING

THE

FatMan

MIDI

Synth

Before

beginning

assembly,

go

through

the

manual.

Look

at

the

drawings.

Feel

the

parts.

You're

naturally

eager

to

plunge

right

in,

but

take

a

few

deep

breaths

first.

Check

the

parts

supplied

against

the

packing

list

on

the

last

page

of

this

manual.

In

some

cases,

notes

packed

with

the

parts

will

be

used

to

call

your

attention

to

special

situations.

These

notes

may

be

in

the

"MISSING

PARTS"

postcard.

If

parts

are

missing

please

notify

PAiA

at

phn

405.340.6300,

fax

340.6378,

or

[email protected]

.

Notice

that

each

step

in

the

manual

is

marked

with

a

checkoff

box

like

this:

DESIGNATION

VALUE

COLOR

CODE

(

)

R27

100

ohm

brown-black-brown

Checking

off

each

step

as

you

do

it

may

seem

silly

and

ritualistic,

but

it

greatly

decreases

the

chance

of

omitting

a

step

and

also

provides

some

gratification

and

reward

as

each

step

is

completed.

Numbered

figures

are

printed

in

the

Illustrations

Supplement

in

the

center

of

this

manual.

These

pages

may

be

removed

for

easy

reference

during

assembly.

THE

CIRCUIT

BOARD

The

FatMan

is

built

on

a

single-sided

circuit

board.

The

solder

side

of

the

board

is

soldered

masked

with

a

conformal

coating

and

conductors

are

tin-lead

plated

for

ease

of

soldering

and

assembly.

No

cleaning

of

the

circuit

board

or

other

special

preparation

is

necessary

before

beginning assembiy.

TOOLS

You'll

need

a

minimum

of

tools

to

assemble

the

kit

-

a

smail

pair

of

diagonal

wire

cutters

and

pliers,

screwdriver,

sharp

knife,

ruler,

soldering

iron

and

solder.

Modern

electronic

components

are

small

(in

case

you

hadn't

noticed)

and

values

marked

on

the

part

are

often

difficult

to

see.

Another

handy

tool

for

your

bench

will

be

a

good

magnifying

glass.

Also

use

the

magnifier

to

examine

each

solder

joint

as

it

is

made

to

make

sure

that

it

doesn’t

have

any

of

the

problems

described

in

the

SOLDERING

section

which

follows.

CAUTION-SMALL

WIRE

Use

particular

care

when

stripping

the

#

26

insulated

wire

supplied

for

panel

witing.

A

low-cost

wire

stripping

tool

available

from

any

electronics

supply

store

is

a

good

investment

and

can

be

set

so

that

only

the

insulation

is

stripped

away

without

nicking

and

weakening

the

wire

strands.

When

instructed

to

“tin”

the

end

of

a

wire,

make

sure

the

solder

wicks

into

the

entire

length

of

the

exposed

wire

strands

-

don't

just

put

a

blob

of

solder

on

the

end.

SOLDERING

Select

a

soldering

iron

with

a

small

tip

and

a

power

rating

not

more

than

35

watts.

Soldering

guns

are

completely

unacceptable

for

assembling

solid

state

equipment

because

the

large

magnetic

field

they

generate

can

damage

components.

Use

only

rosin

core

solder

(acid

core

solder

is

for

plumbing,

not

electronics

work).

A

proper

solder

joint

has

just

enough

solder

to

cover

the

soldering

pad

and

about

1/16-inch

of

lead

passing

through

it.

There

are

two

improper

connections

to

beware

of:

Using

too

littie

solder

will

sometimes

result

in

a

connection

which

appears

to

be

soldered

when

actually

there

is

a

layer

of

flux

insulating

the

component

lead

from

the

solder

bead.

This

situation

can

be

cured

by

reheating

the

joint

and

applying

more

solder.

If

too

much

solder

ts

used

on

a

joint

there

is

the

danger

that

a

conducting

bridge

of

excess

solder

will

flow

between

adjacent

circuit

board

conductors

forming

a

short

circuit.

Accidental

bridges

can

be

cleaned

off

by

holding

the

board

upside

down

and

flowing

the

excess

solder

off

onto

a

clean,

hot

soldering

iron.

Use

care

when

mounting

all

components.

Never

force

a

component

into

place.

CREDITS:

Bits:

Kent

Clark

Timbre

and

Dynamics:

Jules

Ryckebush

Pitches

and

Transients:

John

Simonton

Very

special

thanks

to

Scott

Lee

for

making

sure

it

all

worked,

frequently

fixing

it

when

it

didn't

and

making

as

sure

as

humanly

possible

that

there's

a

dot

over

every

i

and

a

cross

for

every

t.

PAIA

Electronics,

Inc.

disclaims

any

association

with

Mr.

George Sanger

a//a

The

Fat

Man®

and

The

Fat

Man®

-

Interactive

Sound

Design

services

and

products.

PAIA

Electronics

FatMan

MIDI

Controlled

Analog

Synthesizer™

is

neither

sponsored

nor

approved

by

The

Fat

Man®

or

any

entity

with

which

he

is

affiiated.

2

FatMan

MIDI

Synth

001015

FatMan

1

8031

8

Bit

MicroController

2

74HC373

8

Bit

Latch

1

2764

8k

EPROM

1

DACO8

8

Bit

DAC

(may

be

1408)

{

6N138

Opto

{solator

1

74HC14

Hex

Inv.

Schmitt

Trig.

1

LM339

Quad

Comparator

1

4052

Dual

1/4

CMOS

MUX

2

LM324

Quad

OpAmp

(CA324)

1

4016

Quad

Analog

Switch

1

TLO84

Quad

Bi-fet

Amp

(CA084)

2

LM13600

Dual

OTA

(or

13700)

2

SSS

Timer

1

7805

+5V

Voltage

Reg.

1

7808

+8V

“ :

1

7912

-12V

“ ,

3.

100uF/16V

Electrolytic

Capacitor

2

10uF/16V

7

,

5

1uF/16V

$ .

5

2.2uF/16V

.

*

2

470uF/25V

- $

3

1uF

Mylar

Capacitor

2

.O1uF

:

.

2

33pF

Ceramic

Disk

Capacitor

6

OtuF

“

.

1

.OO1uF

“ : =

3

OSuF

“

ig

7

2.

560pF

Polystyrene

Capacitor

2

1N4001

Power

Diodes

8

1N4148

Signal

Diodes

3.

Red

LED

5

2N4124

NPN

Silicon

Transistors

7

2N4126

PNP

Silicon

Transistors

1

1/4”

Phone

Jack

2

PC

Mount

5

DIN

Sockets

3.

PC

Mount

Phono

Jack

2

10k

ohm

PC

Mount

Trimmer

3.

1k

ohm

PC

Mount

Trimmer

8

10kohm

Panel

Mount

Pot

6

tmegohm

c

‘

:

1

1k

ohm

a

«

‘

{

100k

ohm

-

pe

tty

1

§00kohm

=

a

1

Skohm

a : “

001015

Packing

List

IC1

1/4W

5%

resistors

oe

3.

100hm

(brown-black-black)

R38,R39,R93

ICS

10

1000hm

(brown-black-brown)

*R73,R16,R20,R26,R44,

Ics

R53,R81,R83,R91,R95

IC7

15

10k

(brown-black-orange)

R6,R7,R8,R9,R29,R30,

IC8

R46,R55,R67,R76,R77,

ico

R79,R86,R101,R106

ic1Olct3

1

100k

(brown-black-yellow)

R57

IC11.

2

10megohm

(brown-black-biue)

R41,R100

Ic12

1

120

ohm

(brown-red-brown)

R22

ici7ic18

5

12k

(brown-red-orange)

R70,R72,R75,

1C15,IC16

Rvs,

R108

Ic1

9

3

15k

(brown-green-orange)

R14,R58,R62

IC20

1

18k

(brown-grey-orange)

R89

iC14

1

1800

ohm

(brown-grey-red)

*R33

8

10000hm

_(brown-black-red)

R31,R35,R37,

R48,R59,R60,

28,628,030

sees

C15

C18.C31

3.

=2200hm

(red-red-brown)

R2,R4,R5

C32

C33

j

4

22000hm

(red-red-red)

R49,R85,R116,R119

C5

C6

019.022

4

22k

(red-red-orange)

R36,R66,R68,R107

C25

‘

:

2

2700hm

(red-violet-brown)

R3,R19

C26.C27

1

2700

ohm

_

(red-violet-red)

R10

C7

C8

C12

2

330k

(orange-orange-yellow)

R98,R99

C14

C17

3

33k

(orange-orange-orange)

R45,R54,R109

C2

C3

1

390

ohm

(orange-white-brown)

R17

C4.c9

C10,.C11,

2

39k

(orange-white-orange)

R103,R105

C1

3,C1

6

:

3.

470hm

(yellow-violet-black)

R23,R43,R52

C24

2

470o0hm

(yellow-violet-brown)

R110,R111

C34

035.036

10

47000hm

_

(yellow-violet-red)

R1,R12,R15,R27,R28,

€20,621

R61,R65,R88,R97,R112

:

1

§60hm

(green-blue-black)

R25

D10,D11

56k

(green-blue-orange)

R47

D1,D3,D4,D5,

1

68000hm

—_

(blue-grey-red)

R14

Soo.

2

150hm

1W.

Power

Resistor

R117

(see

pg

6)

Q1,Q2,Q7

3

SPST

Panel

Mount

Toggle

Switches

*$1,°S3,°S4

Q10,011

,

{

8

Position

DIP

Switch

$2

Q3,04,05,6,

1

12-14VAC,

PWR1

Qs

Q9.Q12

400mA

(or

greater)

Wall

Mount

Transf.

ie

1

12mHz

Crystal

x1

er

JS

18

Set

Screw

Knobs

av

1

28

IC

Socket

1

40

IC

Socket

R13,R42

2

=

“L”

Brackets

R18,R21,R24

ep

yeer

ies

4

440X

1/4"

Machine

Screws

*R34*R56,

1

4-40

X

1/2"

Machine

Screw

*R6O*R71

1

#4

Fiat

Washer

*R104*R115

42°

Bare

Wire

*R32*RB2

8"

Small

Insulated

Sleeving

*RB4*ROZ,

38'

#26

insulated,

stranded

wire

(4

ea.

9.5'

lengths)

*RO4*ROG

1

Voltage

Regulator

Cooling

Fin

«ROO.

1

9308

FatMan

Printed

Circuit

Board

Ri

4

parts

marked

*

mount

on

the

front

panel

*R113

Designations

R50,

RStand

R87

are

not

used.

FatMan

MIDI

Synth

3

Wire

Jumpers

Assembly

begins

by

forming

and

installing

the

forty

three

wire

jumpers

indicated

by

bold

fines

on

the

circuit

board

parts

placement

designators

and

numbered

in

the

illustration

to

the

right.

For

each

jumper,

cut

a

length

of

the

bare

wire

supplied

by

measuring

it

against

the

distance

between

the

circuit

board

holes

and

adding

about

1/2".

Bend

1/4"

of

each

end

down

and

push

through

the

circuit

board

holes.

Press

the

jumper

fully

against

the

board

and

solder

both

ends.

Trim

off

excess

wire

flush

with

the

solder

joint.

®

Sleeving

on

these

Notice

that

five

of

the

jumpers

will

be

covered

with

the

insulating

sleeving

supplied.

Cut

a

piece

of

sleeving

slightly

shorter

than

the

distance

between

the

holes

and

slip

it

over

the

jumper

before

bending

the

wire

ends

down

and

placing.

(

)

As

outlined

above,

form

and

install

the

43

wire

jumpers

used

on

the

circuit

board.

Os:

é

7

i

U1,

LI.

.

Resistors

Solder

each

resistor

in

place

following

the

parts

placement

designators

printed

on

the

circuit

board

and

the

assembly

drawing

fig

1.

Note

that

resistors

are

nonpolarized

and

may

be

mounted

with

either

lead

in

either

of

the

holes

in

the

board.

Before

mounting

each

resistor,

bend

its

leads

so

that

they

are

at

a

right

angle

to

the

body

of

the

part.

Put

the

leads

through

the

holes

and

then

push

the

resistor

firmly

into

place.

Cinch

the

resistor

in

place

by

bending

the

leads

on

the

solder

side

of

the

board

out

to

an

angle

of

about

45

degrees.

Solder

both

ends

of

each

resistor

in

place

as

you

install

it.

Clip

each

lead

flush

with

the

solder

joint

as

the

joint

is

made.

Save

a

dozen

or

so

of

the

longer

lead

clippings

for

use

as

jumpers

in

later

9388

FatMan

MIDI

Synth

43

Jumpers

sere.

disgregard

gold

or

silver

band

A

tip:

If

you

can’t

find

the

location

for

a

resistor,

go

on

ABC

to

the

and

come

back.

DO

NOT

CHECK

OFF

\

A

PART

UNTIL

IT

IS

INSTALLED

AND

SOLDERED.

DESIGNATION

VALUE

COLOR

CODE

A-B-C

listed

below:

4700

ohm

yellow-violet-red

| | |

()R1

( )

R12

(

)R15

(

)

R27

(

)

R28

(

)

R61

(

)

R65

(

)

R88

(

)

R97

(

)

R112

(

)R2

220

ohm

red-red-brown

i i i

(

}R3

270

ohm

red-violet-brown

| | |

()R4

220

ohm

red-red-brown

| | |

(

)R5

220

ohm

red-red-brown

j i i

listed

below:

410k

brown-black-orange

| | i

( )

R6

()R7

()R8

(

)R9

(

)

R29

(

)

R30

(

)

R46

(

)

R55

(

)

R67

(

}

R76

(

)

R77

(

)

R79

( )

R86

(

)

R101

(

)

R106

4

FatMan

MIDI

Synth

001015

DESIGNATION

(.)

R10

()RM

listed

below:

listed

below:

(

)

R70

(

)

R108

listed

below:

(

)

R36

listed

below:

listed

below:

( )

R49

( )

R52

(

)

R58

(

)

R57

(

)

R62

(

)

R89

( )

R93

()

R98

(

)

R99

( )

R100

(

)

R103

(

}

R105

(

)

R110

()R111

001015

VALUE

2700

ohm

6800

ohm

1000

ohm

(

)

R35

(

)

R6O

12k

(

)

R72

10

megohm

47

ohm

56k

2200

ohm

10

megohm

39k

470

ohm

470

ohm

COLOR

CODE

A-B-C

red-violet-red

Hil

blue-grey-red

i

|

brown-black-red

Hil

(

)

R37

(

)

R48

(

)

R63

(

)

R64

brown-red-orange

HES

(.)

R75

(

)

R78

red-red-orange

Ty

(

)

R68

(

)}

R107

brown-black-brown

HEE

(

)

R26

(

)

R44

(

)

R83

( )

R91

brown-green-orange

BES

orange-white-brown

BCE

red-violet-brown

naa

brown-red-brown

iT

|

yellow-violet-black

[EM

green-blue-black

nal

orange-orange-orangell

§

(

)

R109

brown-black-black

HEE

brown-black-black

HEHE

brown-black-blue

Hid

yellow-violet-black

!

EE

green-blue-orange

HED

red-red-red

ann

{

)

R116

(

)

R119

yellow-violet-black

HM

brown-green-orange

HEE

brown-black-yelow

HH!

brown-green-orange

HED

brown-grey-orange

HEE

brown-black-black

naa

orange-orange-yellow

Bl!

orange-orange-yellow

Bl!)

brown-black-blue

ii

|

orange-white-orange

BOE

orange-white-orange

HOE

yellow-violet-brown

[HE

yellow-violet-brown

[EB

FatMan

MIDI

Synth

5

The

final

resistor

to

be

mounted

on

the

circuit

board

is

in

fact

two

parts.

Locate

the

two

15

ohm

(brown-green-black)

1W

resistors.

These

are

eZ

roughly

twice

the

size

of

the

1/4W

resistors

used

in

the

Cut

the

leads

of

these

parts

to

a

length

of

1"

and

twist

and

solder

one

lead

of

Twist

leads

together

each

together

before

folding

the

resistors

side

by

side

as

shown

in

the

and

solder.

Fold

parts

itustration.

Install

by

pushing

the

two

leads

of

the

composite

part

through

side-by-side.

the

holes

in

the

circuit

board.

These

parts

will

get

very

warm

during

operation.

For

better

air

flow

and

cooling

DO

NOT

seat

them

flush

with

the

board;

instead,

allow

them

to

stand

clear

of

the

board

by

about

1/4".

Solder

-

in

place

and

clip

the

leads

off

flush

with

the

solder

joint.

(

)

R17

30

ohm

2W.

as

detailed

above.

Yo

4,

Disk,

Mylar

and

Polystyrene

Capacitors

i

See

aia

:

.

space

between

parts

Many

of

the

capacitors

used

in

the

FatMan

are

nonpolarized

Ceramic

Disk,

and

circuit

board.

Mylar

and

Polystyrene

types.

For

all

of

these,

either

lead

can

go

in

either

of

the

holes

in

the

circuit

board.

The

leads

of

the

Ceramic

Disk

and

Mylar

capacitors

are

already

parallel

to

each

other

but

still

may

need

to

be

bent

slightly

to

match

the

spacing

of

the

circuit

board

holes.

The

leads

of

the

Polystyrene

capacitors

will

need

to

bend

down

prior

to

installation

and

may

be

further

apart

than

the

spacing

of

the

circuit

board

holes.

Like

the

resistors,

insert

the

leads

of

these

parts

through

the

holes

in

the

board

and

push

the

part

against

the

circuit

board

as

far

as

it

wants

to

go.

Don't

force

it,

i's

OK

if

it

sits

a

little

off

the

board.

Solder

each

capacitor

in

place

as

it

is

installed

and

clip

the

excess

leads

off

flush

with

the

solder

joint.

Capacitors

are

often

marked

with

obscure

codes

that

indicate

their

values.

Capacitors

The

3

digit

number

that

specifies

value

may

be

preceded

or

followed

by

letters

indicating

such

things

as

tolerance.

If

you

get

confused

about

which

capacitors

are

which,

it

may

help

to

group

them

by

same

type

and

check

ee

im

f

them

against

quantities

on

the

packing

list

on

page

3.

{

}

|

"

Disk

Mylar

Polystyrene

Ceramic

Disks

DESIGNATION

VALUE

MARKING

(

)C2

33pF

33

(

)C3

33pF

33

listed

below:

.O1UF

103

(

)C4

()c9

(

)}

C10

(

}

C11

(

)C13

(

)

C16

( )

C24

.001uF

102

listed

below:

.047

uF

473

(may

be

.05uF

-

503

(

)

C34

(

)

C35

( )

C36

Polystyrene

and

Mylar

(

)

C20

560pF

poly

560

(

)C21

560pF

poly

560

(

)C7

.1

uF

mylar

104

(

)c8

.1

uF

mylar

104

(

)Ci2

uF

mylar

104

(

)C14

01

uF

mylar

103

( )

C17

.01

uF

mylar

103

6

FatMan

MIDI

Synth

ootots

Electrolytic

Capacitors

The

remaining

capacitors

are

electrolytic

types.

Unlike

the

electrolytic

capacitors

are

polarized

and

the

leads

are

not

interchangeable.

Leads

are

marked

*+”

and/or

“-"

and

the

“+”

lead

must

go

through

the

“+”

hole

in

the

circuit

board.

Frequently

the

positive

lead

of

the

capacitor

is

significantly

longer

than

the

negative

lead.

Usually

the

Negative

lead

of

the

capacitor

is

marked

rather

than

the

positive.

It

naturally

goes

through

the

unmarked

hole.

Solder

each

capaci-

tor

in

place

as

it

is

installed

and

clip

both

leads

off

flush

with

the

solder

joint.

Capacitors

supplied

with

specific

kits

may

have

a

higher

Voltage

(V)

rating

than

the

minimum

specified

below.

DESIGNATION

VALUE

{

)C1

10uF

/

16V

listed

below:

2.2uF

/

16V

(

)c5

(

)cé

(

)c19

(

)

C22

(

)C25

listed

below:

1uF

/

16V

(

)

C15

(

)C18

(

)C31

(

)

C32

(

)

C33

(

)

C23

10uF

/

16V

(

)

C26

470uF

/

25V

(

)

C27

470uF

/

25V

(

)

C28

100uF

/

16V

(

)

C29

100uF

/

16V

(

)

C30

100uF

/

16V

Diodes

Two

types

of

diodes

are

used

in

the

FatMan,

eight

1N4148

silicon

signal

diodes

in

small

transparent

glass

cases

and

two

1N400x

power

diodes

in

larger

opaque

cases.

Like

the

Electrolytic

Capacitors,

diodes

are

polarized

and

must

be

installed

so

that

the

lead

on

the

banded

end

of

the

part

corresponds

to

the

banded

end

of

the

designator

on

the

circuit

board.

Bend

the

leads

so

they

are

at

tight

angles

to

the

body

of

the

part

and

insert

them

through

the

holes

provided

in

the

circuit

board.

Diodes

are

also

somewhat

heat

sensitive

so

the

soldering

operation

should

be

done

as

quickly

as

possible.

DESIGNATION

VALUE

listed

below:

1N4148

or

1N914

Silicon

Signal

Diodes

(

)01

(

)

D3

(

)

D4

(

)D5

(

)D6

(

)

D7

( )

D8

(

)

D9

(

)

B10

1N400x

(may

be

4001,

4002

or

4003)

(

)D11

4N400x

i

001015

Stripe

is

usually

*"

se

Longer

lead

is

“+

INS14/

IN4

148

li

The

polarizing

color

band

corresponds

to

the

filled

end

of

the

circuit

board

graphic.

FatMan

MIDI

Synth

7

Transistors

Install

the

transistors

by

inserting

their

three

leads

through

the

holes

provided

for

them

in

the

circuit

board.

Note

that

the

transistors

are

polar-

ized

by

the

flat

side

of

the

case.

When

the

transistors

are

properly

installed

this

flat

will

align

with

the

corresponding

mark

on

the

circuit

board

legending.

Solder

each

transistor

in

place

as

it

is

installed

and

clip

the

excess

leads

off

flush

with

the

solder

joint.

Notice

that

two

different

types

of

transistors

are

used.

The

type

will

be

printed

on

the

body

of

the

part.

DESIGNATION

TYPE

listed

below:

2N4124

NPN

Silicon

Transistor

(

)Q1

(

)Q2

(

)Q7

(

)

Q10

(

)

Qt

listed

below:

2N4126

PNP

Silicon

Transistor

(

)Q3

(

)Q4

(

)Q5

(

)

Q6

(

)

Q8

(

)Q9

(

)Q12

Trimmer

Potentiometers

Mount

the

five

trimmer

potentiometers

by

inserting

their

three

pins

into

the

holes

provided.

Press

them

down

until

the

“shoulders”

of

the

solder

pins

are

resting

on

the

surface

of

the

circuit

board.

After

making

sure

that

the

trimmers

do

not

touch

each

other,

solder

all

three

pins

on

each

part.

DESIGNATION

VALUE

(

)

R13

10k

Trimmer

Pot.

May

be

marked

"103"

( )

R42

10k

="

‘

( )

R18

1k

Trimmer

Pot.

(

)

R21

1k

7

=

(

)

R24

ik

.

DIN

Sockets

The

5-pin

DIN

sockets

that

are

the

MIDI

connectors

mount

on

the

circuit

board.

Push

the

seven

pins

of

each

connector

through

the

holes

provided

in

the

circuit

board

and

make

sure

it

is

pushed

down

fully

against

the

board

before

soldering

in

place.

DESIGNATION

TYPE

()Jt

MIDI

Jacks

(

)

J2

MIDI

Jacks

PC

Mount

Phono

Jacks

The

three

Phono

Jacks

that

are

outputs

for

CVs

and

Trigger

mount

to

the

circuit

board

by

pushing

their

three

mounting

tabs

and

the

smaller

center

conductor

through

the

holes

in

the

board.

On

the

trace

side

of

the

board,

bend

the

tabs

inward

slightly

to

cinch

the

connector

in

place

before

soldering

the

smaller

center

conductor

and

mounting

tab

closest

to

the

board

edge.

The

mounting

tabs

on

the

side

of

the

connectors

need

not

be

soldered.

8

FatMan

MIDI

Synth

a»

.

oa

Note

flat

YYffy,

ben,

y

UR

J

/

The

straight

line

of

the

pc

graphic

symbol

corresponds

to

the

flat

face

of

the

transistor

case.

J

001015

Side

tabs

are

DESIGNATION

TYPE

not

soldered

(

)J3

PC

Mount

Phono

Jack

(

)J4

PC

Mount

Phono

Jack

(IS

PC

Mount

Phono

Jack

IC

Sockets

<4

Sockets

are

notorious

for

being

the

weak

links

in

the

chain

of

connections

between

electronic

components.

We

use

them

only

in

places

where

their

advantages

outweigh

their

lack

of

reliability.

The

PROM

is

socketed

so

that

it

can

be

easily

changed

for

upgrades.

The

8031

uP

is

socketed

for

peace

of

mind

-

so

that

if

trouble

shooting

is

needed

it

can

be

easily

removed

and/

or

replaced.

Less

expensive

“glue”

logic

is

soldered

directly

to

the

board.

Sockets

are

polarized

with

a

rectangular

or

semi-circular

notch

at

one

end

of

the

part

which

corresponds

to

a

similar

indicator

on

the

circuit

board

graphics.

The

socket

would

work

just

as

well

if

it

were

inserted

backward

to

the

marked

polarity,

but

this

would

surely

generate

confusion

when

the

time

came

to

install

or

replace

the

ICs.

Insert

the

socket

in

the

circuit

board

holes

and

initially

solder

two

pins

in

diagonal

corners

of

the

pattern.

Make

sure

that

the

socket

is

seated

firmly

against

the

pc

board

by

pressing

it

down

while

remelting

the

solder

joint

at

first

one

corner,

then

the

other.

Finally,

solder

the

remaining

connections.

DESIGNATION

SOCKET

TYPE

()IC4

40

|

CG

Yj

by,

(

)

Locate

the

12

mHz.

crystal.

This

part

is

nonpolarized

and

is

installed

at

Insert

the

leads

through

the

holes

in

the

circuit

board,

solder

both

leads

and

clip

the

excess

off

flush

with

the

solder

joint.

DIP

Switch

(

)IC3

28

CRYSTAL

-

X1

In

both

of

these

examples

all

switches

are

off.

DEFAULT

DIP

SWITCH

-

S2

Locate

the

8

position

DIP

Switch.

Notice

that

the

switch

is

polarized

by

the

numbering

of

the

individual

switches

(1-8)

which

will

be

printed

on

the

package.

Make

sure

that

the

DIP

package

is

mounted

so

that

the

switch

actuator

labeled

as

“1”

is

on

the

end

of

the

package

closest

to

the

edge

of

the

circuit

board.

If

there

is

a

piece

of

tape

protecting

the

switch

bats,

peel

it

off

after

installling

the

part.

slide

to

turn

When

assembling

a

FatMan

board

for

Desk

Case

enclosure

the

switch

mounts

on

the

bottom

(solder

side)

of

the

board

as

detailed

in

the

9308C

Supplement.

When

the

FatMan

circuit

board

is

mounted

behind

a

rack

pane!

the

DIP

switch

mounts

on

the

component

side

of

the

board

using

the

following

step.

( )

Install

the

8-positon

DIP

switch

by

soldering

pins

in

diagonal

corners

of

the

pattern.

Check

to

make

sure

that

switch

section

#1

is

closest

to

the

edge

of

the

circuit

board

and

the

package

is

firmly

seated

against

the

board

before

soldering

the

remaining

pins.

001015

FatMan

MIDI

Synth

Integrated

Circuits

Of

all

the

parts,

the

ICs

are

the

most

easily

damaged

and

should

be

treated

with

some

respect.

In

particular,

they

may

be

destroyed

by

discharges

of

static

electricity.

Modern

ICs

are

not

nearly

as

sensitive

to

this

kind

of

|

damage

as

were

earlier

versions,

but

it

is

still

good

practice

to

handle

these

parts

as

little

as

possible.

Also

good

practice:

don’t

wear

nyion

during

assembly.

Don't

shuffle

around

on

the

carpet

immediately

before

assembly

(or

if

you

do,

touch

a

lamp

or

something

to

make

sure

you're

discharged).

Don't

be

intimidated.

It's

rare

for

parts

to

be

damaged

this

way.

ICs

are

polarized

in

one

or

both

of

two

ways;

A

dot

formed

into

the

case

of

the

IC

corresponding

to

1

or

a

semicircular

notch

that

indicates

the

end

of

the

package

with

1.

Take

care

that

this

polarizing

indicator

corre-

sponds

to

the

similar

indicator

on

the

circuit

board

graphics.

The

pins

of

the

ICs

may

be

splayed

somewhat

and

not

match

the

holes

in

the

circuit

board

exactly.

Carefully

re-form

the

leads

if

necessary

so

that

,

they

are

at

right

angles

to

the

part.

Using

the

same

procedure

as

with

the

sockets

and

DIP

switch

S2,

solder

each

IC

in

place

as

it

is

installed.

DESIGNATION

PARTNO.

DESCRIPTION

,

555

itp?

6N138

(

)Ic2

74HC373

8

Bit

Latch

(

)1c4

74HC373

:

(

)IC5

DACOB8

8

Bit

DAC

(may

be

1408)

74HC

14

(

)Icé6

6N138

Opto

Isolator

Be

a

ye

(

)IC7

T4HC14

Hex

inverting

Schmitt

Trig.

4816

(

)IC8

LM339

Quad

Comparator

TLO84

(

)Ic9

4052

Dual

1/4

CMOS

MUX

(

)1C10

LM324

Quad

OpAmp

DAC88

(

)IC114

4016

Quad

Analog

Switch

4852

(

)Ic12

TLOB4

Quad

Bi-fet

OpAmp

Enso0e

(

)1C13

LM324

Quad

OpAmp

(

)1C15

555

Timer

(

)IC16

555

.

(

)IC17

LM13600

Dual

OTA

(may

be

13700)

74HC373

(

)1C18

LM13600

:

Voltage

Regulators

The

three

voltage

regulators

are

polarized

and

must

be

mounted

so

that

their

tabs

correspond

to

the

tab

markings

on

the

circuit

board

graphics.

Solder

all

three

leads

and

clip

any

excess

off

flush

with

the

solder

joint.

(

)1C19

7805

+5V

Voltage

Regulator

(

)1C14

7912

-12V

‘

.

(

)1C20

7808

+8V

. .

LEDs

Note

that

the

LEDs

are

polarized

by

the

flat

in

the

collar

at

the

base

of

part.

When

property

installed,

this

fiat

will

align

with

the

corresponding

fiat

in

the

LED

symbol

printed

on

the

circuit

board.

ff

you

are

assembling

the

board

for

Desk

Case

enclosure

mounting

follow

the

special

instructions

for

mounting

in

the

9308C

Supplement.

10

FatMan

MIDI

Synth

001015

Paia 9308 Guide

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