Netronics ASCII-A User manual

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FOR USE WITH NETRONICS VIO VIDEO BOARD

Ase

·

11

-A

'

ASSEMBLY INSTRUCTIONS

.

"

SPECIFICATIONS

Power

Requirements:

6.3 -8V

AC

or

+5,

-12V

DC

Full

128

character

ASCII

set

2

key

rollover

Upper

and

lower

case

Selectable

parity

Positive

or

negative

logic

output

Shift

lock

key

G

-

IO

glass expoxy

printed

circuit

board

Connects

to

any 8-bit

parallel

I/O

port

Alpha

lock

jumper

(permits

upper

case

only

operation)

Drive

capability

(one

TTL

load)

NETRONICS

RESEARCH

AND DEVELOPMENT

LIMITED

333

LITCHFIELD

ROAD

(RTE

.

202)

NEW

MILFORD

.

CONNECTICUT

06776

(203)

354

-

9375

I

\

)

-

ASCII KEYBOARD

ASSEMBLY

INSTRUCTIONS

Check

all

parts

in

your

kit

against

the

following

list.

Description

Quantity

Momentary

Switches

Latching

Switch

Caps

as

per parts

layout

Space

Bar

Wire

Form

Space

Bar

Wire Form

Holder

Screw

#4

x

3/8"

Nut

#4

Wire

Form

Mounting

Yoke

Printed

Circuit

Board

40

Socket

Ribbon

Cable

Assembly

with

14

Dip

Headers

(6")

Diode

IN4001

IC-1

KR2376-0l2

Ql

UA79Ml2

(-l2V

Regulator)

Q2

LM340T

or 7805

(+5V

Regu,a~r)

,

C-2 .00luf

Mylar

Capacitor/)GJ~

C-3

.047uf

Mylar

Capacitor

C-4 lOuf

Electrolytic

Capacitor

C-5

56pf

or

68pf Disc

Capacitor

C-6,7

47uf

Electrolytic

Capacitor

C-8

lOOuf

Electrolytic Capacitor

R-2,3

Resistor 4.7K

(yellow,

violet,

red)

R-4

Resistor 680K

(blue,

gray,

yellow)

R-S

Resistor

lOOK

(brown,

black,

yellow)

R-6

Resistor

lOK

(brown,

black, orange)

5S

1

56

+

space

bar

1

2

I

1

3

1

2

1

2

1

tional

Price

Deluxe

Steel

Cabinet

(IBM

blue

&

black)

2.50 P&H

(Refer to

Keyboard

Assembly

Figure)

DO

NOT

INSTALL

IC's

UNTIL

POWER

CHECK

HAS

BEEN

MADE

()

1.

Mount

wire

form

mounting

yoke

on

top side

of

P.C.

board.

Use

2

#4

screws

and

nuts.

()

2.

Install

40

IC

socket

at

location

IC-l.

(Solder)

()

3

.

Install

key

switches.

Note:

Solder

one

lug

only.

The second

lug

will

be

soldered

after

the

key

caps

have been

installed

and

straightened.

There

are three

possible

sets

of

holes

for

the

RETURN

key

switch.

Use

the

center

set

of

holes.

The

shift

lock

key

is

the

latching type switch

and

should

be

installed

first.

()

4.

Install

key

caps

(do

not

install space

bar

yet).

()

5.

Check

alignment

of

keys

and

straighten

keys

by

heating

solder

connection

and

repositioning

switch.

-1

()

6.

Solder remaining

unsoldered

switch

lugs.

()

7.

Install

the

two

space

bar

wire

form

holders

into

the

end

slots

on

the

bottom

of

the

space

bar.

The holes

must

face

the

middle

of

the

space

bar.

()

8.

Install the

wire

form into

the

mounting

yoke

on

the

P.C.

board,

as

shown.

()

9.

Install

the space

bar

on

the

key

switch.

Then

insert

the

wire

form into

the

wire

form

holder

on

the space

bar.

( )

10.

Install

resistor

R-2,3,

4.7K

(yellow,

violet,

red)

~

(Solder)

( )

11.

Install

resistor

R-4

680K

(blue,

gray,

yellow).

(Solder)

( )

12.

Install

resistor

R-5 lOOK

(brown,

black, yellow).

(Solder)

( )

13.

Install

resistor

R-6

10K

(brown,

black, orange).

(Solder)

( )

14.

Install

diode

CR1,

CR2,

CR3

(IN4001). NOTE:

Band

must

face

as

per assembly

drawing.

( )

15.

Install

Q1

(UA79M12),

as

shown. (Solder)

( )

16.

.

Install Q2

(LM340T

or

7805),

as

shown. (Solder)

( )

17.

Install

C-2

.001

Mylar

capacitor.

(Solder)

( )

18.

Install

C-3

.047

Mylar

capacitor~

(Solder)

( )

19.

Install

C-4

10uf

capacitor.

Note

polarity.

(Solder)

( )

20.

Install

C-5

56pf

or

68pf disc

capacitor.

(Solder)

( )

21.

Install

C-6,7

47uf

capacitor.

Note

polarity.

(Solder)

(

)

22.

Install

C-8

100uf

capacitor.

Note

polarity.

(Solder)

JUMPER SELECTION

If

you

are

using

the ASCII

keyboard with

your

ELF

II

or

Explorer

85,

connect

jumpers

as

follows.

If

you

are

using

a

different

computor,

check

the

jumper

table

and

connect

as

per

your

requirements.

(

)

23.

Connect

J2,

J4.

(Solder)

Note

no

parity

signals

are

used

on

ELF

II.

JUMPER

TABLE

J1

_

-

LOGIC,

~UPPER

_

&

_

1

0~3

__

£ASE,

J5

ODD

PARITY

@2

LO(lJh

)

-

.f

UPPER

CASE

ONLY,

J6

EVEN

PARITY

(

)

24.

Solder ribbon

cable

assembly

as

per

assembly

drawing.

Note

#1

must

be

positioned

as

shown.

(A

socket

could

be

used

but

will not

be

as

reliable)

•

-2

1

.

_

POWER

SUPPLY TEST

Check

all

soldering

and

components

for

proper

value.

There

are

three

alternative methods

to

power

your ASCII

keyboard:

(1)

use

6

.

3

-8V

AC transformer,

(2)

use

your Netronics expansion

power

supply

kit,

(3)

use

a

separate

+SV

and -12V

(regulated) supply.

If

you

are

using

an

AC supply (lor

2

above):

(

)

1.

Connect

the 6.3

-8V

AC

to

the

P.C.

board

.

If

you

are

using

a

separate

AC

transformer

be

sure

to

connect

the

ground

terminal

on

your

keyboard

to

the

ground

on

your

computor

or

video

display

board.

( )

2.

Measure

the

DC

voltage

at

the +SV and

-12V

pads

on

the

P.C.

board.

They

should

read

within

5%

of

the

specified

values.

Do

not

proceed

to

install

the

IC

if the

voltage

is

improper.

If

you

are

using

a

separate

+SV

and

-12V

supply

measure

the

voltage

before

inserting

the

IC.

( )

3.

Disconnect

the

power

supply.

(

)

4.

Install

IC-l.

Note location

of

#1.

( )

5.

Plug

the

14

pin ribbon cable

into

the

video

display

board.

Note

the

posi-

tion of pin

#1.

WARRANTY

All

of

the

components

supplied

in

this

kit

are

under warranty

for six

months

from

the

date

of purchase.

Any

parts suspected

to be

defective

should

be

returned

to

Netronics

with

$1.00

for

postage

and

handling.

They

will

be

tested

and

returned

postpaid.

IN

CASE

OF

DIFFICULTY

Tn

the

event

of

difficulty,

check

all

wiring

against

the instructions.

Check

for

solder

bridges

and

all

component

·

values

.

If

you

still

cannot

determine

the

problem,

return

the

defective printed

circuit

board

ONLY.

Please enclose

a

check

or

money

order

for

$7.00

and

pack

the

board

securely,

and insure

the

parcel.

Your

unit

will

be

tested

and

returned

insured

and

postpaid.

Mailing

address:

NETRONICS

RESEARCH

&

DEVELOPMENT

LIMITED,

333

Litchfield

Road,

Route

202,

New

Milford,

Connecticut

06776,

Attention: Service

Department.

-3

+S--:-:O -

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Netronics ASCII-A User manual

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