Netronics ASCII-A Bedienungsanleitung

::.

FOR USE WITH NETRONICS VIO VIDEO BOARD

Ase

-A

ASSEMBLY INSTRUCTIONS

SPECIFICATIONS

Power

Requirements:

6.3 -8V

+5,

-12V

Full

128

character

ASCII

set

key

rollover

Upper

and

lower

case

Selectable

parity

Positive

negative

logic

output

Shift

lock

key

glass expoxy

printed

circuit

board

Connects

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

)

ASCII KEYBOARD

ASSEMBLY

INSTRUCTIONS

Check

all

parts

your

kit

against

the

following

list.

Description

Quantity

Momentary

Switches

Latching

Switch

Caps

per parts

layout

Space

Bar

Wire

Form

Space

Bar

Wire Form

Holder

Screw

3/8"

Nut

Wire

Form

Mounting

Yoke

Printed

Circuit

Board

Socket

Ribbon

Cable

Assembly

with

Dip

Headers

(6")

Diode

IN4001

IC-1

KR2376-0l2

UA79Ml2

(-l2V

Regulator)

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

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)

space

bar

tional

Price

Deluxe

Steel

Cabinet

(IBM

blue

black)

2.50 P&H

(Refer to

Keyboard

Assembly

Figure)

NOT

INSTALL

IC's

UNTIL

POWER

CHECK

HAS

BEEN

MADE

()

Mount

wire

form

mounting

yoke

top side

P.C.

board.

Use

screws

and

nuts.

()

Install

socket

location

IC-l.

(Solder)

()

Install

key

switches.

Note:

Solder

one

lug

only.

The second

lug

will

soldered

after

the

key

caps

have been

installed

and

straightened.

There

are three

possible

sets

holes

for

the

RETURN

key

switch.

Use

the

center

set

holes.

The

shift

lock

key

the

latching type switch

and

should

installed

first.

()

Install

key

caps

(do

not

install space

bar

yet).

()

Check

alignment

keys

and

straighten

keys

heating

solder

connection

and

repositioning

switch.

-1

()

Solder remaining

unsoldered

switch

lugs.

()

Install

the

two

space

bar

wire

form

holders

into

the

end

slots

the

bottom

the

space

bar.

The holes

must

face

the

middle

the

space

bar.

()

Install the

wire

form into

the

mounting

yoke

the

P.C.

board,

shown.

()

Install

the space

bar

the

key

switch.

Then

insert

the

wire

form into

the

wire

form

holder

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

per assembly

drawing.

( )

15.

Install

(UA79M12),

shown. (Solder)

( )

16.

Install Q2

(LM340T

7805),

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

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

you

are

using

the ASCII

keyboard with

your

ELF

Explorer

85,

connect

jumpers

follows.

you

are

using

different

computor,

check

the

jumper

table

and

connect

per

your

requirements.

(

)

23.

Connect

J2,

J4.

(Solder)

Note

parity

signals

are

used

ELF

II.

JUMPER

TABLE

LOGIC,

~UPPER

0~3

£ASE,

ODD

PARITY

LO(lJh

)

UPPER

CASE

ONLY,

EVEN

PARITY

(

)

24.

Solder ribbon

cable

assembly

per

assembly

drawing.

Note

must

positioned

shown.

socket

could

used

but

will not

reliable)

•

-2

POWER

SUPPLY TEST

Check

all

soldering

and

components

for

proper

value.

There

are

three

alternative methods

power

your ASCII

keyboard:

(1)

use

-8V

AC transformer,

(2)

use

your Netronics expansion

power

supply

kit,

(3)

use

separate

+SV

and -12V

(regulated) supply.

you

are

using

AC supply (lor

above):

(

)

Connect

the 6.3

-8V

the

P.C.

board

you

are

using

separate

transformer

sure

connect

the

ground

terminal

your

keyboard

the

ground

your

computor

video

display

board.

( )

Measure

the

voltage

the +SV and

-12V

pads

the

P.C.

board.

They

should

read

within

the

specified

values.

not

proceed

install

the

if the

voltage

improper.

you

are

using

separate

+SV

and

-12V

supply

measure

the

voltage

before

inserting

the

IC.

( )

Disconnect

the

power

supply.

(

)

Install

IC-l.

Note location

#1.

( )

Plug

the

pin ribbon cable

into

the

video

display

board.

Note

the

posi-

tion of pin

#1.

WARRANTY

All

the

components

supplied

this

kit

are

under warranty

for six

months

from

the

date

of purchase.

Any

parts suspected

to be

defective

should

returned

Netronics

with

$1.00

for

postage

and

handling.

They

will

tested

and

returned

postpaid.

CASE

DIFFICULTY

the

event

difficulty,

check

all

wiring

against

the instructions.

Check

for

solder

bridges

and

all

component

values

you

still

cannot

determine

the

problem,

return

the

defective printed

circuit

board

ONLY.

Please enclose

check

money

order

for

$7.00

and

pack

the

board

securely,

and insure

the

parcel.

Your

unit

will

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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