215665 9701_Silent_700__720_730_Operating_Instructions_Aug_1970 9701 Silent 700 720 730 Operating Instructions Aug 1970

User Manual: 215665-9701_Silent_700__720_730_Operating_Instructions_Aug_1970

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SILENT 700

Electronic

Data

Terminal

//~n\

Model 720/30

Series

li\VW)

. 8&1'

\"

.....

~

Operating li1structions

MANUAL NO. 215665-9701

REVISED

14

AUGUST,

1970

TEXAS

INSTRUMENTS

INCORPORATED

DIGITAL.

ilviiTP.

QIVI.loN

P.O.

BOX

e8027

HOUSTON.

TEXAS

77008

Copyright

1970

B-y

Texas Instruments Incorporated

All

Rights Reserved

The information

andlor

drawings set

forth

in

this document and

all

rights in

and

to

inventio_ns disclosed herein and patents which might be granted thereon

disclosing

or

employing

the

materials, methods, techniques

or

apparatus

described herein are the exclusive property

of

Texas Instruments Incorporated.

No disclosure

of

the information.or drawings shall be made

to

any

other

person

or

organization without the prior consent

of

Texas Instruments Incorporated.

IMPORT

ANT

NOTICE

Only use

paper

in

this equipment which meets the requirements

of

TI

Specification 213714.

Other

papers may permanently damage

the

printhead

and/or

mechanism.

r

[,

(

r

(

(

[

[

I

(

(

I

(

(

[,

r

Section

II

TABLE

OF

CONTENTS

Page

GENERAL

DESCRIPTION

.......

1-1

1-2 Scope

of

Manual

...........

1-1

1-2 Description

of

Equipment

.....

1-1

1-2.1

Model720

..............

1-1

1-2.2

Model721

..............

1-1

1-2.3

Model722

..............

1-2

1-2A

Model

723

..............

1-2

1-2.5

Model730

..............

1-2

1-2.6

Model731

..............

1-2

1-3

Standard

Equipment

........

1-2

1-3.1 Keyboard and Transmisssion

Code

.................

1-2

1-3.2

Data

Format

...........

.

1-3.3 Communication Interface

...

.

1-3.4 Auxiliary Device Interface

1-3.5

Interrupt

..............

.

1-3.6 Parity Checking

.........

.

1-4 Options

................

.

1-4.1

40

Character/Second

Operation

(Model

720/21)

.........

.

1-4.2 Answer-Back Memory

(Model

720/30)

.........

.

1-4.3 Lower Case (All Models)

1-4.4 Built-In

Data

Sets

........

.

1-5 Specifications

............

.

1-5.1 Printer

...............

.

1-5.2 Physical

..............

.

1-3

1-3

1-5

1-5

1-6

1-6

1-6

1-6

1-6

1-6

1-6

1-7

1-8

INSTALLATION AND CHECKOUT

2-1

2-1

Equipment

Installation

.......

2-1

2-1.1 Power Connections

........

2-1

2-1.2

Communication

Interface

Connection

.............

2-2

2-1.3 Auxiliary

Input/Output

Device

Connection

......

, 2-2

Section

III

APPENDIX A

iii

Page

2-1.4 Model 722 Connection

..

..

2-2

2-1.5 Model

723

Connection

..

. . 2-2

2-2 Preliminary Checkout

.....

, 2-5

2-3 Paper Loading

..

. . . . . . . . . 2-5

2-4 Programming the

Answer-Back Memory . . . .

..

2-6

EQUIPMENT OPERATION . . . . . 3-1

3-1 General

...............

3-1

3-1.1 Model

720/30

..........

3-1

3-1.2 Power Switch

..........

3-1

3-2 Controls . . . . . . . . . . . . .

..

3-2

3-3 Condition Indicators

3-4 Operating Sequence

......

.

3-4.1

Operation

With A

Remote

Device

........

.

3-4.2

Operation

With Auxiliary

Input

Device

..........

.

3-4.3

Operation

With Auxiliary

Output

Device

.........

.

3-4.4

Operation

With

Answer-Back Memory

.....

3-5 Model

721/31

Operating Sequence

......

.

3-5.1

Operation

With A

Remote

Device

........

.

3-5.2

Remote

Device

and

Auxiliary

Output

Device

.........

.

3-6 Model

722

Operating Sequence

3-7 Model 723

..........

..

.

3-7.1 Controls . . . . . . . . . . . . . .

3-7.2 Condition Indicators

....

.

3-7.3 Operating Sequence

.....

.

3-8

Abnormal

Events

........

.

3-2

3-2

3-4

3-4

3-4

3-4

3-4

3-4

3-4

3-5

3-5

3-5

3-5

3-5

3-5

A COMPARISON BETWEEN TELETYPE

KEYBOARD AND MODEL

720/730

KEYBOARD

Figure No.

1-1

1-2

1-3

1-4

2-1

2-2

2-3

2-4

2-5

2-6

Table No.

1-1

1-2

LIST

OF

ILLUSTRATIONS

Page

silent

700 Electronic

Data

Terminal

1-1

Serial

Data

Timing Diagram

.......

1-2

Code

System

and

Character

Set

1-7

Outline Dimensions

............

1-8

120V

and

240V

Operations

.......

2-1

Terminals

Connections

..........

2-1

TTY

Neutral

Interface

Model 730,

Full

Duplex

Wiring Diagram . . . . . . . 2-3

TTY

Neutral

Interface Model 730,

Half

Duplex

Wiring Diagram

......

2-3

TTY

Neutral

Interface

Model 731,

Receive

Only

Wiring Diagram

......

2-4

TTY

Polar

Interface

Model 730,

Full

Duplex

Wiring Diagram . . . . . . .

2-4

Figure No.

2-7

2-8

3-1

3-2

3-3

3-4

3-5

LIST

OF

TABLES

Page Table No.

Model

720/21

Data

Terminal

1-3

Data

Set

Interface

Table

.........

1-3

Model

730/31

Data

Terminal 1-4

Communication

Interface

1-4

iv

r

[

Page

TTY

Polar

Interface

Model 731, r

Receive

Only

Wiring Diagram

......

2-5

Paper

Loading

Diagram

..........

2-6

Internal

Controls

..............

3-1

Model

720/30

Keyboard

[

Arrangement

.................

3-2

Keyboard

Codes

Generated

When

Shift

and

Control

Keys are [

not

Depressed

................

3-3

Keyboard

Codes

Generated

When

Shift

Key

is

Depressed

..........

3-3

Keyboard

Codes

Generated

When (

Control

Key

is

Depressed

........

3-3 I

I

(

(

Page

Model

722/23

Data

Terminal

Signal

Interface

Table

...........

1-4

Model 720, 721, 730, 731

Data

Terminal

Auxiliary Interface Table

..

1-5 (

I

I

I

[

[

SECTION I

GENERAL DESCRIPTION

1-1 SCOPE

OF

MANUAL.

This is the operating instruction manual for the Silent

700

Electronic Data Terminal, Models 720/30, produced

by

the

Digital Systems Division

of

Texas

Instruments. This manual

provides

the

information necessary for installation and

operation

of

the

following models: 720, 721, 722, 723,

730,

and 731

Data

Terminals.

1-2 DESCRIPTION OF EQUIPMENT.

The terminal

is

a self-contained electronic page printer

designed for a wide variety

of

telecommunications. (see

Figure 1-1) Silent electronic printing

is

achieved with the

use

of

a

dot

matrix on a monolithic solid-state printhead

that

moves across

the

page, printing

80

characters per 8

inch line. The matrix

is

composed

of

35 separate solid-state

heating elements, each electronically controlled. During the

printing operation,

input

data

is

decoded and voltage

is

applied

to

the

proper elements, causing a transfer

of

thermal energy to the heat-sensitive paper which creates the

image.

1-2.1 MODEL 720. The Model

720

terminal

is

a KSR

(keyboard send/receive),

Input/Output

unit. Choice

of

speeds and options

give

flexibility in applications such

as:

timesharing, point-to-point telecommunications, remote

access and computer console use.

1-2.2 MODEL 721. The Model 721 terminal

is

a receive-

Figure 1-1. Silent

700

Electronic Data Terminal

1-1

only configuration

of

the

Model

720

and incorporates

an

EIA serial

data

interface for receipt

of

data

transmission

over private

communication

lines. Areas

of

application

include public and private telecommunications systems

as

well as wire service

remote

stations.

1-2;3 MODEL 722. The Model 722 terminal

is

a receive-

only configuration

of

the Model 720 with a parallel-by-bit

data interface.

It

may

be

used

as

a hard-copy

printer

with

video

data

terminals, desk-top computers

and

calculators,

or

with

another

remote

data

terminal. This

terminal

is

designed

for

hard-wire

connection

to

a source

of

parallel

data

output

and

is

similar in

appe~rance

and

operation

to

the

Model 721.

1-2.4 MODEL

723.

The

Model 723 terminal

is

a

KSR

(keyboard send/ receive) configuration

of

the

Model

720

with parallel-by-bit

information

interchange.

It

is similar in

operation

to

the Model

722

with

the

addition

of

a

keyboard

for parallel transmission

of

information.

1-2.5 MODEL

730.

The Model

730

terminal

is

a

KSR

(keyboard send/receive)

unit

similar

to

the Model

720

but

designed for telegraph-grade dc signal

data

transmission.

It

has special application in areas using low-speed mechanical

teletypewriters, such

as

private

and

public telecommunica-

tions systems,

remote

terminals and

computer

consoles.

This terminal is provided with a Teletype interface circuit

SPACE

-T-,

-

-r

-T

(+12V) I I I I

I t I I

OV I I r

• I I

I I I

MARK

I I I I

for direct compatibility with existing terminals.

1-2.6 MODEL

731.

The

Model 731 terminal

is

a receive-

only

configuration

of

the

Model 730.

It

has a

dc

signal

interface for receipt

of

telegraph-grade

data

from wire

services

and

other

public

and

private telecommunications

systems. This terminal may also

be

used as a hard-copy

printer for desk-top

computer,

calculators and

computer

terminal applications.

1-3 STANDARD EQUIPMENT.

The terminal comes

complete

with printhead,

control

electronics

and

data

set interfaces.

i-3.1

KEYBOARD

AND

TRANSMISSION CODE

a.

Model

720/21/30/31

-USASCII, 7-leve1, 11

bits per

character

including

parity,

start

and

2

stop bits

at

10

characters per second speed;

10

bits per character with 1 stop

bit

at

higher.

speeds.

Standard

operating

speeds

of

10, 15,

or

30

characters per second are provided

by

a

selector switch (see Figure 1-2). Printable

characters, 68 plus 4

printer

control

characters

and 5

terminal

control

characters. (See Figure

1-3.)

b. Model

722/23

-USASCII, 7-level, parallel

-T-T-'--l

I I I I

I I I t

I I I

I I I I

I I

I I I I I

(-12V)

L_.L_..L_-L_-L_J.._..l.

, I

--

-

START

DATA

DATA

DATA

DATA

DATA

DATA·

DATA

PARITY

STOP STOP

START

BIT

BIT

1 BIT 2

BIT

3

BIT4

BIT

5 BIT 6

BIT

7

BIT BIT BIT

BIT

'I.

T1

~

T2

CHA RACTE RS/SEC

n(MS)

T2(MS)

10

9.09 100

15

6.66 66.6

30

3.33 33.3

40

2.50 25.0

Figure 1-2. Serial

Data

Timing Diagram

1-2

r

[

(

('

I

(

I

I I

[I

['

[

[

input;

printable

characters 68, plus 4

printer

control

characters. (See Figure 1-3.)

1-3.2

DATA

FORMAT

a.

b.

c.

d.

Model

720/30

-

An

internal

switch provides

choice

of

half

or

full-duplex

operation.

Serial

transmISSIOn

is

asynchronous

serial-by-bit,

s e rial-by-character. Auxiliary

Input/Output

parallel-by -bit, serial-by-character.

Model

721/31

-Simplex,

asychronous

serial-

by-bit,

serial-by-character. Auxiliary

output

parallel-by-bit, serial-by-character.

Model

722

-Simplex,

asychronous

parallel-by-

bit,

serial-by-character. Terminal

controlling

source

must

provide

required

serial characters

in

the

bit

parallel.

Asynchronous

operation

obtained

by

requiring

that

input

lines be

strobed

when

ready.

Completion

of

print

opera-

tion

is

indicated

by

READY-BUSY line.

Model

723

-Full-duplex,

asychronous

parallel-

by-bit,

serial-by-character. (Same as

722)

1-3.3 COMMUNICATION

INTERFACE

a. Model

720/21

-

Data

set interface

per

EIA

TABLE

1-1

b.

c.

Standard

RS

23

2B.

The

signals and

connector

pins involved are described in Table 1-1. A

5-foot

data

set cable

with

25 pin

connector

is

supplied

with

terminal.

Model

730

-

Teletype

interface, neutral

keying.

The

signals

and

connetor

pins involved

are described

in

Table 1-2.

1.

Input

current

-

60

rnA

2.

3.

4.

5.

6.

Input

switching

currents

-30

mA

Output

current

capability -60

mA

Output

voltage capability -

130

VDC

Signal

interface

-4 spade lugs

Convertible

to

20

mA loop

by

clipping

out

one

resistor

Model

731

-

Teletype

interface, neutral

keying.

The

signals

and

connector

pins involved

are described in Table 1-2.

1.

Operates

in receive-only

mode

on

2 wires.

2.

Input

current

-

60

mA

MODEL 720/21

DATA

TERMINAL

SERIAL

COMMUNICATION

INTERFACE

TABLE

Connector

Pin

Numbers

J-13

Pin

Function

Terminal

(Yellow)

Data

Set

1 1

Protective

G rou nd4

2 2

Transmitted

Data

4

,6

NOTES

3 3 Received

Data

4

1 Held

to

a high

condition

by

data

terminal.

4 4

Request

to

Send

l

,4,6

5 5 Clear

to

Send

2

,4;6

2Held

to

a high

condition

by

data

set

during

6 6

Data

Set

Readl

,4

transmission.

7 7 Signal G rou nd4 3 Held

to

a high

condition

when

data

set

is

8 8

Data

Carrier

Detector

4 operative.

A

20

Data

Terminal

Readyl

,4

4 Used

only

with

external

modem,

EIA interface,

B

and

data

set

cable

assembly 215563-0001.

C S Used

only

with

internal

modem

and

phone

line

D

Communication

LineS

cable

assembly 215619-0001.

E 6

Not

present

on

Model 721.

F

G

H

Communication

LineS

1-3

Pin Number Pin Function

Terminal (Yellow)

1

2 Teletype Line*,1

3

4

5

6 Teletvpe Line2

,3

7

8

A

B

C

D Teletype Line*,1

E

F

G

H Teletype Line2

,3

Parallel

Output

Connector Connector

(81

ue

J-11)

Pin Number

Output

from Keyboard

1 Data Line 18

2 2

3 3

4 4

5 5

6 6

7 7

8 Data Line 8

A

a

C Signal Ground

D

E

F

Output

Strobel

G

H

TABLE

1-2

MODEl

730/31

DATA

TERMINAL

COMMUNICATION INTERFACE

NOTES

1 Full duplex transmitter

output

loop.

2

Full

duplex receiver input loop.

3 Pin 0

and

Pin H must

be

tied together

for

half

duplex operation.

*Not

used

on

Model 731.

TABLE

1-3

MODEL

722/23

DATA

TERMINAL

SIGNAL

INTERFACE

TABLE

Parallel

Input

NOTES

Connector (RedJ-12)

Input

to

Printer

All

logic levels

are

TTL

compatible, Le.:

Data Line 18

+0·

.

2

+5-

2.6 VDC

for

logic high

3 0+. 5

-0 VDC

for

logic low

4 11.0

]Js

minimum high pulse

to

indicate validity

5

of

data lines.

6 2 Held

to

a

low

condition

by

the terminal when a

7

ch~racter

is

being printed, indicating busy.

Data Line 8 3

Not

used

on

Model.

723.

Ready/Busy2 41.0

].Js

minimum high pulse

to

initiate

print

Signal Ground cycle.

Printer Start3

,5

5100

].Js

minimum high pulse

to

turn

on data

Input

Strobe4 ,7 terminal. (Holds printer

to

"ON"

state when

Printer Stop3

,6

held high.

6100

].Js

minimum high pulse

to

turn

off

data

terminal (Ineffective

if

printer start held high.)

7

Used

to

initiate printing action.

I! Data line 1

thru

data line 7 corresponds

to

b1

thru

b7

of

ASC-II code

(see

Figure 1-2). Must

precede input strobe

by

1

].Js.

*Not

used

on Model 722.

1-4

r

r

[,

[

[

[

I

[

[

[I

I

(

I

I

I

[

(

d.

3.

Input

switching currents -

30

mA

4.

Signal interface - 2 spade lugs

5. Convertible

to

20

rnA

loop

and

polar

operations

by

clipping

out

resistors.

Model

722

-

The

red

connector,

J12,

is

used

to

connect

the

terminal

to

a source

of

parallel

coded

data.

The

signals

and

.connector

pins

involved are described in Table 1-3.

e. Model

723

1.

The

red

connector,

J12,

is used

to

connect

the

terminal

to

a source

of

parallel

coded

data.

2.

The

blue

connector,

J11,

is

used

to

pro-

vide

connection

to

the

terminal's parallel

keyboard

output.

Signals

and

connector

pins involved are described

in

Table 1-3.

1-3.4

AUXILIARY

DEVICE

INTERFACE

a. Model

720/30

-

The

Model

720

and

the

Model

730

have

identical

auxiliary

input

and

output

device interfaces.

The

signals

and

the

connector

pins involved are described in Table 1-4.

b.

Model

721/31

-

Neither

terminal

has

provi-

sions

for

use

of

an

auxiliary

input

device;

however

both

models have identical auxiliary

output

device interfaces.

The

signals

and

the

connector

pins involved are described

in

Table

1-4.

1-3.5

INTERRUPT

a.

b.

Model

720

-Allows

operator

to

interrupt

transmission

from

computer

to

terminal

when

necessary

by

means

of

the

BREAK key. Com-

munication

is

immediately

established

with

the

remote

computer

by

transmission

of

a space for

longer

than

140

ms,

which

is

interpreted

as

an

interrupt

or

break.

This feature requires a

full-duplex

modem

and/or

transmission media.

Model

730

-Same

procedure

as Model

720,

but

no

modem

is used.

In

full-duplex

operation,

the

break

signal is

transmitted

on

the

separate

send

loop

while

data

is being received

on

the

TABLE

1-4

Connector

Auxiliary

Output

Pin Connector (Red)

Number

J·ll

1 Data

Line

19

2 2

3 3

4 4

5 5

6 6

7 7

8 Data Line 8

A

B Signal Ground

C

Auxiliary

Output

Device Start!

D

Auxiliary

Output

Device Strobe2

E

Auxiliary

Output

Device Stop3

F

G

H

MODEL

720, 721, 730, 731

DATA

TERMINAL

AUXILIARY

INTERFACE

TABLE

Auxiliary

Input*

NOTES

Connector (Blue)

All

signals

are

TTL

compatible, i.e.:

J·12

Data Line 19 +5+0

·2.6 VDC

for

logic high

2 +5

3

O·b

VDC

for

logic

low

4 1100U; minimum high pulse

to

turn on auxiliary

5

output

device when

"DC2"

is

received.

6 2100l1s minimum high pulse

to

indicate validity

of

7

output

data lines.

Data Line 8 3100l1s minimum high pulse

to

turn

off

auxiliary

Auxiliary

I

nput

Device Stop4

output

device when

"DC4"

is

received.

Terminal Readys

4100115

minimum high pulse

to

turn

off

auxiliary

Signal Ground input device when

"DC3"

is

received.

5 Held high

to

indicate terminal

is

ready

to

accept

Auxiliary

Input

Device On6 data.

6 Held

to

a

low

condition

by

auxiliary

input

device

Aux

il

iary I

nput

Device

Stare

when operational.

7100l1s

minimum high pulse

to

turn on auxiliary

Auxiliary

Input

Device

input

device when

"DC1"

is

received.

Data StrobeS s10.0f,ls minimum high pulse

to

indicate validity

of

data on auxiliary

input

data lines.

9 Data line 1

thru

data line 7 corresponds

to

b1

thru b7

of

ASC

II

code,

(see

Figure 1-2).

*Not

used

in Model

721

or

731.

1-5

receive loop.

For

half-dupleJ!:,

the

break

signal

will

break

the

receipt

of

data

from

the

remote

transmitting

unit

to

allow its receiver circuits

to

sense

the

interrupt

condition.

1-3.6 PARITY CHECKING. No parity check

is

provided

on

data received. Even parity

is

generated with data

entered

from

the

keyboard. Through an internal reconnection,

parity transmissions can be overridden

by

causing a logic

one

to

be continuously transmitted for

thc

parity bit.

1-4 OPTIONS

1-4.1·.40 CHARACTER/SECOND. OPERATION (MODEL

720/21).

A fixed

speed

for

serial

data

transmission

and

printing

of

40

characters per second

may

be provided

in

lieu

of

normal switch-selected speeds for Model

720

and

Model 721.

1-4.2 ANSWER-BACK MEMORY (MODEL

720/30).

A

21-character, 8-bits-per-character

memory

is

provided.

Readout

is serial-by-bit

and

serial-by-character, activated

remotely

or

loc;tlly.

Readout

speed

is

that

of

the

terminal

transmission rate. Message

is

not

printed

or

transmitted

to

auxiliary data device.

1-4.3 LOWER CASE {All Models). Lower case alphabetic

printing, from a 5 x 5

portion

of

the

5 x 7 matrix, character

size .0715 in x

_080

in. giving 94 printable characters, is

provided.

1-4.4 BUILT-IN DATA SETS.

a. Model

720

- A field interchangeable modem

(DS100TH or DS100TL data set) may

be

supplied in

the

form

of

a plug-in printed circuit

card. The

connector

pins involved are indicated

in Table 1-1.

1. DS100TL

DATA

SET -Compatible with

the

Bell

103F1

originate

mode

transmit/

receive data set.

Modulation -frequency shift keying

Transmit carrier

frequencies -

1270

Hz -

mark

1070

Hz -space

Receive carrier

frequencies -

Transmitter

output

level -

2225

Hz -mark

2025

Hz -space

0-15 dbm, adjustable

1-6

b.

c.

2.

Receiver

input

level -

Input

and

output

line impedances -

Transmit-control

function

-.

Receive

control

function -

Type

facility -

operation

between

+5 .

dbm

and

-35

dbm

600/900

ohms

request

to

send/clear

to

send,

265

±65 mc

Carrier

detect

time

operate,

150

rns

±50

msr'elease,

50 ms

±25ms

3002

line (no con-

ditioning)

DS100TH

Data

Set

-

Compatible

with

the

Bell

103F2answer

mode

transmit/

receive

data

set. Similar

to

DS100TL

data

set except:

Transmit carrier

frequencies -

Receive carrier

frequencies -

2225 Hz -mark

2025

Hz -space

1270

Hz -

mark

1070

Hz

-space

Model 721 - A field interchangeable modem

(DS100RH

or

DS100RL data set) may

be

supplied in the form

of

a plug-in preinted-

circuit card. The DSIOORH

is

the

receive-only

version

of

the

DSlOOTH. The DSIOORL

is

the

receive-only version

of

the

DS100TL. The

connector

pins involved are indicated in Table

1-1.

Model

730/31

-Teletype interface, polar key-

ing.

The

connector

pins involved are indicated

in Table 1-2.

Input

currents -5 rnA

to

60

rnA

Input

switching currents - 5 rnA

Output

current

capability -

60

rnA

Output

voltage capability -

130

VDC

1-5 SPECIFICATIONS.

[!

[;

r

[

r

[

r

I ' I

(:

[

r:

I

(,

(

[i

I

[

r

[

1-5.1

PRINTER

e.

platen

-

Friction

feed

a. Printing

method

-5 x 7

dot

matrix,

electron-

f.

Carriage/Return

time -

195

milliseconds

ically

heated,

printing

on

maximum

heat

sensitive paper.

b. Line

length

- 8 inches,

80

characters

g.

Line feed time -25 milliseconds

c. Line spacing -6 lines

per

inch h. ·Printable characters -

up

to

94, see figure 1-3

d.

Paper -

~T.I.

Part

No.

213

14-0001)-'

Roll, 8.5 inches wide i. Carriage

return

and

by

3.625

inches maxi- Line feed

(CR/LF)

-

Automatic

at

column

81,

mum

diameter

(300

No

code

is

transmitted.

feet),

heat

sensitive.

b7 0 0 0 1 1 1 1

b6 0 1 1 0 0 1 1

b4 b3 b2 bi bs 1 0 1 0 1 0 1

0 0 0 0

SP

0 @ P

..

P

0 0 0 A Q a q

0 0 0 2 B R b r

0 0 # 3 C S c s

0 0 0 $ 4 D T d t

0 0 % 5 E U d u

0 0 & 6 F V f v

0

~

7 G W 9 w

0 0 0 8 H X h x

0 0 9 Y y

0 0 * J Z j z

0 + K [ k {

0 0 < L \

0 M m }

0 > N t n

1 / ? 0 +- 0

NOTE:

All

lower

case

alphabetic letters

will

be

printed

as

upper

case

unless the

"Lower

Case

Alphabetic

Print"

option

is

incorporated

L--

__

---I,

PRINTABLE

CHARACTER

REF: USAS x 3.4·1967

_

PRINTER

CONTROLCHARACTER

[j,~?/

~/

',~;

I

AUXI

LlARY

DEVICE

CONTROL

CHARACTER

_II

CODES

GENERATED

BY

KEYBOARD,

BUT

NO

ACTION

TAKEN

Figure 1-3.

Code

System

and

Character

Set

1-7

1-5.2 PHYSICAL.

a.

Terminal

size

See figure 1-4

Width

Depth

Height

17.75

inches

18.25

inches

6.75

inches

b.

c.

Terminal

weight -Models

720,

723,

730

38

pounds

Models

721,

722,

731

32

pounds

Power

requirements

-

120

VAC ±10%,

50/60

Hz,

240

watts

maximum.

240

volt

operation

optional,

see

Section

II,.

INST

ALLA

TION.

1-8

1

.........

----18.25---~~

I

=

c=:::::J

c=:::::J

c=:::::J

c:==

=

==

==

c::::=::=l

c::::=::=l

c:=::::J

c:::=:::::J

'-

-"

Figure 1-4.

Outline

Dimensions

[

[

17.75 (

(I

I

I

(

('

I

I

(

I

I

SECTION II

INSTALLATION AND CHECKOUT

2-1 EQUIPMENT INSTALLATION

The

Electronic

Data

Terminal

is

a self-contained

unit

requiring

no

auxiliary

equipment

for usual

data

terminal

operation.

2-1.1

POWER

CONNECTIONS.

The

normal

power

connec-

tion

is

120

VAC,

50/60

Hz, 3 wire.

To

use

the

optional

240

VAC,

·50/60

Hz

power

changes

must

be

made

in

the

terminal.

Disconnect

the

yellow,

brown

and

green leads

from

their

present

location,

(See Figure 2-1).

Connect

these

three

leads

to

the

center

connector

of

the

terminal

block.

Remove

the

molded

120

volt plug from

the

power

cord

and

install a

240

volt, 15 amp

rated

tandem

blade plug.

LEADS

FROM

POWER

CORD

CAUTION

A visual

inspection

should

be

made

of

the

terminal

before

applying

power. Check for

obvious shipping damage.

Open

the

top

cover

and

remove

the

card

cover

from

the

card rack.

Check

that

no

foreign

objects

are present.

Insure

that

all cards are tightly plugged

into

their

sockets

and

that

all

connectors

to

the

electronics assembly are secured. Replace

the

card

cover

and

close

the

top

cover. Check

that

all keys

on

the

keyboard

operate

freely.

GREEN

AND

BROWN

TRANSFORMER

LEADS

WHITE

TRANSFORMER

LEADS

BLACK

&

GREEN

LEADS

FROM

TRANSFORMER 7 BROWN &

WH

ITE

LEADS

FROM

TRANSFORMER

BLACK

TRANSFORMER

120V

OPERATION

FAN

LEADS

(YELLOW)

POWER CORD

LEAD

240V

OPERATION

Figure 2-1.

120V

and

240V

Operations

2-1

2-1.2 COMMUNICATION

INTERFACE

CONNECTION.

Connection

is

made

at

the rear

of

the

terminal

with

an edge

connector

(see Figure 2-2).

a.

Data

Set Cable (Part No.215563-1)

is

used

to

connect

a

standard

Model

720

or 721

to

an

external

data

set. A standard RS232B

compatible 25-pin

connector

is

provided

at

the

end

of

the

5-foot

cable.

For

pin assignments,

see Table 1-1.

b.

phone

Line

Connection

(Part No.215619-1)

is

used

to

connect

a Model

720

or 721

with

the

built-in

data

set

option

to

a

phone

line.

Connection

consists

of

an

edge

connector

for

connection

to

the

terminal

and a 5-foot cable

terminated

with

two

spade lugs for

connection

to

the

Bell

System

Direct

Access Arrangement.

For

pin assignments, see Table 1-1.

c.

Teletype

Connection

(Part No.215620-1)

is

used

to

connect

the

Model

730

or

731

to

the

communication

line.

Connection

consists

of

an

edge

connector

for connection

to

the

terminal

and

a

5-foot

cable

terminated

with

four

spade

lugs.

The

standard

Model

730

is

shipped with

the

60

rnA

input

current

level.

To

set for

20 rnA,

R2

on

card assembly

244552-0002

or

-0001 (rearmost card

in

the

card rack)

must

be

clipped

out.

On

Model

731

to

set for polar

operation,

R2

and

R1

must

be

clipped

out

on

244552-0001.

For

specific connections, see

Figures

2-3,2-4,2-5,2-6,

and

2-7.

2-1.3

AUXILIARY

INPUT/OUTPUT

DEVICE

CONNECTION.

Connection

is

made

at

the

rear

of

the

terminal

with

an edge

connector

(see Figure 2-2).

For

pin

assignments, see Table 1-4.

2-1.4 MODEL

722

CONNECTION.

The

parallel

input

connection

is

made

at

the rear

of

the

terminal, below

the

red

dot,

with

an

edge

connector

(see Figure 2-2).

For

pin

assignments, see Table 1-3. A

connector

kit

21,5584-0001

is

provided for

connection

to

the terminal.

2-1.5 MODEL

723

CONNECTION.

The

parallel

input

is

identical

to

that

of

the

Model

722.

The

parallel

output

is

made

at

the

rear

of

the

terminal

below

the

blue

dot.

See

Table 1-3 for pin assignments.

Two

connector

kits

215584-0001

are provided for

connection

to

the

terminal.

Figure 2-2. Terminals Connections

2-2

[.

r

(

I

(

('

[

I

[

[

1

[

I

[

, SPADE LUG

TRANSMIT

CABLE ASSY

#215620:.0001

WHT

GRN

BLK

*

,RED

*

MODEL 30

TERMINAL

r--------,

I

TTY

INTERFACE CARD I

# 244555-0002

J13-6 I I

~~~~

I

CURRENT I

SENSOR

.113-H

CURRENT

SWITCH

TELETY!~

{

LOOP

~----~------------~~~~-+---<

I

I

I

I

I

I

I

L

_______

-1

Figure 2-3. TTY Neutral Interface Model 730, Full Duplex Wiring Diagram

(Yellow Dot)

*ARROW

INDICATES POSITIVE CURRENT DIRECTION

A DOUBLE ARROW INDICATES POSITIVE CURRENT CAN

BE

EITHER DIRECTION

TO

TTY

LOOP

SPADE LUG

CABLE ASSY

# 215620:.0001

WHT

GRN

*

MODEL

30TERMINAL

r

--------,

I

TTY

INTERFACE CARD I

#244555-0002

J13-6 I I I

+---+~I"'-I

CURRENT I

J13-H I I

SENSOR

~--------~~~

I I

I I

J13-D

BLK

RED

I I

CURRENT

SWITCH

I

I

I

I

L

_________

.J

Figure 2-4. TTY Neutral Interface Model 730, Half Duplex Wiring Diagram

(Yellow Dot)

2-3

*ARROW INDICATES POSITIVE CURREN-T DIRECTION

TO

TTY

LOOP

NOT

USED

SPADE LUG

CABLE ASSY

# 215620-0001

WHT

GRN

BLK

RED

J1

J1

3-6

/

"

-H

/

3),

f

"

3-2

/

"

MODEL

31

TERMINAL

r------l

I

TTY

INTERFACE CARD I

#244555-0001

I

~

1

...

1

'

......

I

I CURRENT I

I

SENSOR

..... 1 I

I

~

I I

L

______

-1

Figure 2-5. TTY Neutral Interface Model

731,

Receive only Wiring Diagram

(Yellow

Dot)

**ARROW

INDICATES DIRECTION

MARK

CURRENT

SPADE LUG

MODEL 30

TERMINAL

CABLE ASSY

r------,

TTY

INTERFACE CARD

#215620-0001 I #244555-0003 I

3-6

I t

/

".

I CURRENT I

J1

TTY

RECEIVE LINE < WHT * *

••

~----~--~~~~

+-~-+---------~-+-<

-H

I SENSOR I

/

" I I

J13

TTY

COMMON < GRN

.•

~--~~~------~

~~-~----------~~

I I

3-D

I I

/

" I

N.C.

I

I CURRENT I

3-2

I Q SWITCH t

/

"

N.D.

I I

BLK

J1

r-

---'1

s~~11

IJJ-4-<1

LINE I

i

Il~

~-+-

__

R_E_D

_--+-<J1

L

____

,..J

L

______

J

EXTERNAL

LOOP

SUPPLIES

Figure 2-6. TTY Polar Interface Model

730,

Full Duplex Wiring Diagram

(Yellow

Dot)

2-4

[,

[,

['

[:

. ,

(

I

I

(

(

('

r

[,

**ARROW

INDICATES DIRECTION

MARK

CURRENT

TO

TTY

LOOP

NOT

USED

SPADE

LUG

CABLE

ASSY

# 215620-000 1

WHT

**

MARK

CURRENT

GRN

J13

-6

/

~

J13

-H

/

-~

J13

"/

J1

3)

,.

"

t/·

.

MODEL

31

TERMINAL

r

--------

..,

I

TTY

INTERFACE CARD I

# 244555-0001

I I

I I

I CURRENT

I

SENSOR

I

I I

I I

L -

------

__

.J

Figure 2-7.

TTY

Polar Interface Model

731,

Receive only Wiring Diagram

(Yellow

Dot)

2-2 PRELIMINARY CHECKOUT.

A visual check

of

the

data

terminal

should be made before

applying power. Check for

any

obvious shipping damage

such as

broken

plastic scale,

dents

in

the

case or packing

material inside

the

case.

Check

to

see

that

the

top

opens

freely

without

interference. Remove the black cover from

the

top

of

the

cardrack

and

power supply. Visually check

that

there are

no

foreign objects present

that

could possibly

short

any

of

the

circuits. Press

down

on

the

card ejectors

of

all cards

to

be

sure

they

are all plugged

into

their sockets

tightly.

Check

to

be

sure

that

none

of

electrical

connectors

to

the

cardrack are loose, especially

the

terminal

block. Also

check

to

see

that

all keys

on

the

keyboard

operate properly-

without

binding. Lift

the

pinch roller and move

the

printhead

across the carriage

to

see

that

the

printhead

moves freely

without

interference.

Before plugging

the

power

card

into

a 240-volt

outlet

verify

that

the

terminal

block

has

been

connected

as

described in

Paragraph 2-1.1.

2-3 PAPER LOADING.

Only

use

paper

in

this

equipment

which

meets

the

requirements

of

TI

Specification

213714.

Other

papers may

permanently

damage

the

printhead

and/or

mechanism.

2-5

The

terminal must be

loaded

with

paper before turning on

power.

The

paper

is

loaded

as follows:

a.

Open

terminal cover

and

lift pressure pinch

roller. (See Figure 2-8.)

b. Lift

out

paper supply axle and remove any

paper

that

may be in the drive.

c.

Put

a roll

of

paper

on

the

supply

so

that

the

paper feeds as shown in Figure 2-8.

d.

e.

f.

g.

h.

i.

Unroll

about

12

inches

of

paper

and

form a

point

to

aid in threading

the

paper.

Thread

the

paper

as

shown in Figure 2-8.

Be

sure

the

paper

is

centered

in

the

paper chute.

Lower

the

pinch roller.

Check

that

the

paper

is

straight in

the

feed

mechanism.

Turn

on

the

power switch

and

depress

the

PAPER ADV key.

Feed

out

about

six inches

of

paper

to

insure

proper

operation.

Close

the

terminal

cover, being sure

that

the

paper

is

fed

through

the slot in

the

plastic

shield.

PAPER

GUIDE

DRIVE ROLLER

PINCH

ROLLER

FLANGED

ROLLER----------~~l

PRINT HEAD

PAPER

SUPPLY ROLL

Figure 2-S.

Paper

Loading

Diagram

2-4

PROGRAMMING

MEMOR Y OPTION. THE ANSWER-BACK

The

Answer-Back

memory

is

a Sx21

diode

matrix

which

can

be

programmed

for

any

message desired.

The

unit

is

shipped

initially

with

all

ONEs

in

the

matrix

indicated

by

all diodes in place. A

ZERO

may

be

generated

in

any

bit

location

and

any

character

by

clipping

out

or unsoldering

2-6

one

end

of

the

appropriate

diode.

The

card assembly is

244531-0001

and

is

located

in

position

3 as

indicated

in

Figure 3-1.

The

data

bit

number

and

character

number

are

marked

on

the

cards

with

diodes

CR1

thru

CR168

used

for

the

matrix.

Note

that

the

delete code

with

even

parity

(all

ONEs) can

not

be

transmitted

as this

is

the

code

which

resets

the

memory.

[,

(

[

(i

[

r

I

I

(

(

[

[,

SEC'~ION

III

EQUIPMENT OPERATION

3~1

GENERAL.

This section provides

the

information necessary for an

operator

to

carry

out

transactions with a computer using

anyone

of

the Model

720/30

Series data terminals. Those

operations which are common

to

the entire Series are

discllssed initially followed

by

a discussion

of

each

of

the

different models individually.

3-1.1 MODEL

720/30.

From

the operator's point

of

view,

the operation

of

the Model

720

and Model 730

is

identical.

The

only distinction between the two

is

the type

of

interface between

the

terminal and

the

other device with

which

it

is

communicating.

HALF/FULL,

DUPLEX .

SWITCH'

~1.2

POWER SWITCH. The power switch

is

located on

the keyboard (see Figure 3-1). In the

OFF

position,

both

sides

of

the power line are disconnected from all circuits in

the terminal with the exception

of

the fuse. In the ON

position, power is supplied

to

all circuits in the terminal.

NOTE

In earlier models

of

the terminal the

power switch may be located under the

cover.

3-1.3 DATA TRANSMISSION SPEED SWITCH. The data

transmission speed switch sets the serial data transmission

Figure 3-1. Internal Controls

3-1

speed

at

10,

15,

or

30

characters per second. This

control

is

not

present in the Model

720

data

terminal

equipped

with

the 40 character per second speed option.

3-1.4 TRA:"NSMISSION MODE SWITCH. This switch

selects

either

Half

or

Full Duplex operation

of

the

communication interface.

3-2 CONTROLS.

The

'Model

720/30

keyboard

arrangement

is

shown in

Figure 3-2. Figure 2-2 shows

that

the specific codes

generated

by

the terminal

and

Figures 3-3, 3-4,

and

3-5

show the

status

of

the

shift and

control

keys

to

generate

the

codes.

PAPER

ADV

(Paper Advance Key) -The Paper Advance

Key

is

used

to

advance the paper through the printer during

paper loading or clearing

of

the inachine. A manual paper

advance

knob

is

also provided on

the

right side

of

the

printing mechanism.

NOTE

Extended

operation

of

paper advance key

may

calise fuse t() blow. This

is

designed

for

maximum

protection.

LINE

FEED

(Line

Feed

Key) -The line feed

key

generates

the line feed code.

Upon

re'ceipt

of

this code

the

printer

advances the paper one line while printhead retains its

position

on

the

page.

Backspace Key (BS)

-c,

The

backspace code is generated

when the

control

key

and .the

BS

key are depressed. (See

Figure 3-5.)

The

printhead

is

stepped one position

to

the

left as long as the pril;lthead

is

not

in column one when"

code

is

received

by

the

printe,r.

Bell (BEL) -

The

bell

code)s

generated when the

control

key

and

the BEL

key

are depressed (see Figure 3-5).

The

audible alarm is actu<\:ted

when

this code

is

received

by

the

printer.

CAR

RET

(Carriage

Return)

-

The

carriage

return

key

generates

the

carriage

return

code;

The

printer

~auses

the

printhead

to

return

to

the left-hand margin

when

CR

is

received. NOTE:

The

paper

is

not

advanced one line.

REPEAT (Repeat Key) -When

the

repeat

key

is

depressed

in conjunction'

~ith

any

other

coded

keyboard

character,

that

character

is

generated

repeatedly

at the terminal's

operating speed.

NOTE

The

REPEAT

key must be depressed

first, prior

to

the

key

desired

to

be

repeated.

HERE IS (Here

Is

Key) -

The

Here

Is

key

triggers

the

Answer-Back Memi;lry causing

its'

contents

to

be

transmitted

(but

not

printed).

BREAK (Break Key) -

The

Break key causes

the

terininal

to

transmit

a space

for

greater

than

140

ms

if

the

ON-LINE

key

is depressed. The first time

the

key

is

depressed, the

BREAK light

is

turned

on

and

the

interrupt

signal is

transmitted.

The

light remains

on

until

the

BREAK

key

is

depressed again.

ON-LINE

(On~Line

Key) -

The

On-Line key

is

an alternate

action

key

which controls the

transmitter

and

receiver

circuit connections

to

the

communication

interface.

Depressing the

key

once

puts

the

terminal in the

"On

Line"

state, i.e., connects the

transmitter

and

receiver circuits

to

the

communication

line. Depressing

the

key

again

puts

the

terminal in the LOCAL state, i.e.,

transmitter

connected

to

receive circuits and

not

to

the

communication

line.

3-3 CONDITION INDICATORS.

POWER -

indicat~s

that

the

power switch

is

in

the

ON position.

ON LINE -indicates the

On

Line key

is

depressed.

LOCAL -indicates

the

On

Line

key

is

not

depressed.

BREAK -indicates

the

Break

key

'has

been

depressed.

n-lltlfOC-1llETBl[ENQI[Dc.2I[DC-4I[EMlfNAKl(HTI[SIIIDlEI~Ir::Ir;z1

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EJ

ICTRLI

IS~HIID~.3'IE~T'IA~K'IB~L

II

~s

I

QI

~T

11

F

t,

CJ

[J

I

CAR

RU

..

I_S_H_IF_T_

...

I

S~B'

[ZJ

[TI

[TI

ITJ

CS[J

[fJ

lTI

CJ

OJ

I

SHIFT

(SPACE

BAR) I

Figure 3-2. Model

720/30

Keyboard

Arrangement

3-2

I~I

~

[

r

[,

f:

[

r

r

[

[

r

('

[

BQQwQQwQQQQ~QQ~§~

[J

0

GJ

GJGJ[JQ[JQQGJeJD

EJ

§ B

o 0

GJ

[J

GJ

Q

[J

Q

[J

Q Q 0 0 I

CAR

RETURN

I §

I

1[J[JQOQQGJDDeJl

I

I (SPACE BAR) I

NOTE:

Upper

case

alphabet

codes

are

generated

unless

the

lower case

option

is

included.

Figure 3-3.

Keyboard

Codes

Generated

when

Shift

and

Control

Keys

are

not

Depressed

BDDD~~~~D~~DDD~§~

DCJ~~~c:J~~~tJ~c:J~EJ~8

o 0

~J

~

~

c:J

~

~

[J

c:J

[J

0

LJ

I

CAR

RET

I §

I

SHIFT

I

~ ~

~

~

~

~

c:J

[J

[j

[J

I

SHIFT

I

I (SPACE BAR) I

Figure 3-4.

Keyboard

Codes

Generated

when

Shift

Key

is

Depressed

~DDD~~~~DDDDLJD~§~

DDEjEJEJ~~EJEJEJc:J~EJEJ~B

EJ

0

EJ

~

EJ

EJ

EJ

EJ

rJ

c:J

EJ

0 0 I

CAR

~T

I [;j

I

IEJ~EJEJ[7JEJEJc:JEJEJI

I

I (SPACE BAR) I I . I f

~)9

I

JOf'l

v

Figure 3-5.

Keyboard

Codes

Generated

when

Control

Key

is

Depressed

3-3

3-4 OPERATING SEQUENCE.

3-4.1 OPERATION WITH A REMOTE DEVICE.

a.

Make

the

appropriate

communication

interface

connection

(See Section II).

b.

Lift

the

top

cover

and

set

the

switches for

the

appropriate speed

and

type

of

communication.

c. With the

On

Line

key

released, move

the

power

switch

to

ON.

d.

Lower

the

top

cover, threading

the

paper

through

the

clear plastic window.

NOTE

The LOCAL and POWER indicators

should

be

on. The terminal is

now

in

the

local

mode

of

operation, allowing keyboard

information

to

actuate

the printer.

e. Depress the ON LINE key, turning

the

LOCAL

light

off

and

the

ON LINE light on.

The terminal

is

now

in

the

transmit

mode

of

operation.

If

the

switch

is

in

the

Half-Duplex

position, keyboard

information

is

allowed

to

actuate

the

printer, otherwise

no

action is

taken

by

the printer when a key

is

depressed.

3-4.2 OPERATION WITH AUXILIARY INPUT DEVICE.

a.

Connect the terminal

to

the

auxiliary

input

device (Refer

to

Section II).

b. Place the Auxiliary

Input

Device in a

mode

such

that

it

can be controlled remotely

by

the

terminal.

c.

d.

place

the

terminal

in

the Local

mode

by

turning

on

the power switch with

the

On

Line key

released.

Depress

the

control

key (CTRL)

and

the

DC1

key (see Figure 3-5)

to

start the transfer

of

information

from

the

Auxiliary

Input

to

the

terminal.

This transfer continues until

the

auxiliary

input

device transmits

the

DC3

control

character

or

is

manually

turned

off.

If

the

terminal

is

in

the

transmit

mode,

i.e.

On

Line key depressed. and

the

switch

is

in the Full-Duplex position the

Auxiliary.

Input

can be

turned

on

and

off

by

the

reception

of

the

DC1

and

DC3

control

characters, respectively. While the Auxiliary

Input

is

operational the

keyboard

is inoperative

with

the

exception

of

the

Paper Advance key.

3-4.3 OPERATION WITH AUXILIARY OUTPUT DE-

VICE.

3-4

a.

Connect

the

terminal

to

the

Auxiliary

Output

device (Refer

to

Section II).

b. place

the

Auxiliary

Output

de.vice in a mode so

that

it can

be

remotely

controlled

by

the

terminal.

c. place

the

terminal in

the

local

mode

by

turning

on

the

power

switch with

the

On

Line key

released.

d. Depress

the

control

key

(CTRL)

and

the

DC2

key

(see Figure 3-5)

to

turn

on

the

Auxiliary

Output

device.

Each key

that

is

depressed

thereafter

should

be

acted

upon

by

the

Auxiliary

Output

device.

This continues until

the

control

key (CTRL)

and

the

DC4 key are depressed,

turning

off

the

Auxiliary

Output

device.

If

the

terminal

is

in

the

transmit mode,

the

Auxiliary

Output

device

may

be

remotely

controlled

through

use

of

the

DC2 and DC4

control

characters.

3-4.4 OPERATION WITH ANSWER-BACK MEMORY.

The Answer-Back Memory has

the

highest

priority

of

input

information.

When

it

is

used in

conjunction

with an

Auxiliary

Input

device

both

the

keyboard

and

Auxiliary

Input

are disabled while

the

Answer-Back Memory

is

sending its message.

The

Answer-Back Memory may

be

triggered

remotely

by

the ENQ

character

or

locally

by

the

HERE-IS key. The message

stored

in

the

Answer-Back

Memory

is

not

printed when it is triggered.

3-5 MODEL

721/31

OPERATING SEQUENCE.

The

operation

of

the Model 721

and

Model 731

is

identical.

The

only distinction between

the

two

is

the

type

of

interface

between

the terminal

and

the

device which

transmits

information

to

the

terminal.

3-5.1

OPERATION

WITH A REMOTE DEVICE. Opera-

tion

with

a

remote

device

is

accomplished

by

making the

appropriate

communication

interface

connection

(see Sec-

tion II).

Set

speed switch for

the

appropriate

speed

and

then

turn

the

power

switch ON. The

terminal

is ready

to

receive

information.

3-5.2 REMOTE DEVICE AND

AUXILIARY

OUTPUT

DEVICE.

Connect

the terminal

to

a

remote

device

as

above.

Then

connect

the terminal

to

an

Auxiliary

Output

device

(see Section II). The Auxiliary

Output

is

turned

on

and

off

through

the

use

of

the DC2

and

DC4

control

characters,

respectively. .

[:

(!

[!

[:

[

[

[

[

[

[

[

(

[

[

[

[:

[:

[I

3-6 MODEL

722

OPERATING SEQUENCE.

All

that

is necessary

to

operate a Model

722

is

to

connect

the

terminal

to

a source

of

parallel data according

to

Section II

and

turn

the

power switch

to

th~

ON position.

3-7 MODEL

723.

3-7.1 CONTROLS. The Model

723

keyboard arrangement

is identical

to

that

of

the

Model

720/30

(see Figure 3-2).

Figure 1-3 shows

the

specific codes generated

by

the

terminal

and

Figures 3-3, 3-4, 3-5 show

the

status

of

the

shift

and

control

keys

to

generate

the

codes.

LINE

FEED

(Line

Feed

key) -Generates

the

line

feed code.

Backspace key (BS) -Generates

the

backspace code.

Bell (BEL) -Generates

the

bell code.

DEL

(Delete key) -Generates

the

delete code.

CAR

RET (Carriage

Return)

-Generates

the

carriage

return

code.

REPEAT (Repeat key) -Inoperative

HERE

IS (Here Is key) -Inoperative

BREAK (Break key)

-Inoperative

ON LINE (On Line key) -Controls only

the

status

of

the

LOCAL and

the

ON LINE indicators.

3-5

3-7.2 CONDITION INDICATORS.

POWER -Indicates

that

the

power switch is in the

ON

position.

ON LINE -Indicates

the

ON-LINE key

is

depressed.

LOCAL -Indicates

the

ON-LINE key is released.

BREAK -Inoperative.

3-7.3 OPERATING SEQUENCE. First

the

terminal

is

connected

to

a source

that

is able

to

provide

and

accept

parallel data. (See Section II).

The

power switch is then

turned

on

and

the

terminal is ready

to

accept information

and simultaneously provide parallel

data

at

its

output.

3-8 ABNORMAL EVENTS.

Should

the

terminal

not

operate properly check the

following

prior

to

calling service personnel:

1. Check power connections

2.

3.

4.

5.

6.

Check power switch

ON

Check fuse

Check speed switch

Check

that

external connectors are plugged

in

and

screwed down.

Check

that

paper

is

properly loaded.

[

[:

[:

f·

[,

[.

[I

['

[,

[

[I

[

I:

[,

[:

[

[,

[;

[

APPENDIX A

A COMPARISON BETWEEN

THE

TELETYPE KEYBOARD

AND THE MODEL

720/730

KEYBOARD

---

-

-----------------

----------

-

----"-

----"-"----------"-----

-----"-----------

-

[

[,

[

r

[-

[

[,

[

[

[

[,

[

[

[,

[

[

[I

[,

[

~

,!....

SHIFT

CONTROL

SHIFT

&

SHIFT

CONTROL

SHIFT

&

KEY

ONLY

ONLY

CONTROL

KEY

ONLY ONLY

CONTROL

A

SOH

P

DLE

B

STX

Q

DCl

C

ETX

0

SI

H

BS

U

NAK

K C

ESC

V

SYN

L "

FS

W

ETB

M C

GS

X

CAN

N

SO

RS

Y

EM

Z

SUB

CD

r\

(#\

CD

f%\

f&\

{t\

(T\

CD·

f\

()

f=\

t::::d

1\:v\2)4\'v~\.2)'V9\.V:0~

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LTQQ

evRU

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Q Q

CE)AB

Q

Q@INE@E-."-"',

OD

Q W E R T Y U I O· P EED

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....

8

TRL

f\

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f\ f\

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'--../

8G)QG)QG)G)QOOCD8

( )

Figure A-I.

Teletype

Model

733/735

Keyboard

Arrangement

>

N

D

*

D

SHADED KEYS

INDICATE

KEYS WHICH ARE LOCATED IN

DIFFERENT

POSITIONS FROM TELETYPE

MODEL

33/35.

UNDERLINED

KEYS

INDICATE

THOSE KEYS WHICH GIVE

DIFFERENT

FUNCTIONS AS

SHOWN

IN

TABLE

1.

KEYS WITH

AN

ASTERISK

ABOVE THEM INDICATE KEYS WHICH GENERATE CHARACTERS NOT

AVAI

LABLE

ON

THE TELETYPE

MODEL

33/35.

*

n

[JJI

r-:l

f4il

f$I

f7l

r-&l

J.l

f7l1ll

A

~.

1

~

~

~~

~~

~~

~

RITi~~~~~~~~j;l~

llJl.:;J~~WWL2Jl!J~L!.Jl.£J~

*

U

*-

I,::~~:~jl

IcrRLI=I~II~31IE~.IIA~II~LlrnQI~lmrnn

. . ,

~=

t=~

lil::lll,

Mifr:tt::::'1

l:i'~~~~:1

~ ~

~

~

rrul

fSol

fGSl

I<ll>ll?ll

SHIFT

SHIFT

l2J

L2J

~

~ ~

ll::J

~

L:.J

LJ

lLJ

.

..

----

----

----

~--------~

SPACE

-~

_______

~

co

-]

DEPRESSING THE FOLLOWING KEYS WITH THE CONTROL KEY

WILL

GENERATE THE FOLLOWING CHARACTERS

NOT SHOWN

ON

THE KEYTOPS.

, =

FS

. =

RS

/ =

US

Figure A-2.

Model

720/730

Keyboard

Arrangement

~~~~~~~~~~~~~~~~~~~

/~