Centronics 730-1 Owner's Manual

MODEL 730-1

PRINTER

©MNlg^

AMtUJAlL

DECEMBER

1979

Centronics

No. 37400741

Rev.

-2

CERTRDniCS

data

computer

corporation

Hudson,

New

Hampshire

03051

Telephone

(603)

883

-

0111

TABLE

CONTENTS

OF

SECTION

INTRODUCTION

SPECIFICATIONS

SETTING

RIBBON

UP

INSTALLATION

OPERATION

PRINCIPLES

PRINTER

OF

INTERFACE

MAINTENANCE

OPERATION

PAGE

• •

•

1

2

3

8

10

12

^

21

7/

_i-

INTRODUCTION

Model

The

dot-matrix,

characters

second.

per

9-1/2"

1.

position

multipart

Rolled

2.

printer

edge

printed

operator

Single

3.

typewriter.

printer's

The

characters

which

are

730-1

is

impact

inch

per

printer

The

(9"

pin to

up

to

3-1/2 to

pins

paper,

includes

allows

easy

within

attendance.

sheets

of

character

printed

be

can

double-width

operationally

an

printer.

line

in

features

pin)

wide

ensure

three

parts.

8-1/2-

roll

a

removal

five

lines

8-1/2

set

inch

at up

characters

unit

The

lengths

three-way

standard

pinfeed

wide,

paper.

of

holder.

tear

paper

of

wide

consists

to

simple,

prints

up

paper

edge.

paper,

of

characters

80

be

can

compact,

7x7

to 8

inches

paper

computer

registration.

1"

core

built-in

A

first

The

Two ply

hand

ASCII

US

96

printed

microprocessor

matrix

dot

rate

a

at

handling.

fanfold

and up

to

rip-and-read

of

line

paper

fed as

with

characters.

line.

per

at up

to

characters

of 100

forms,

paper

The

5"

diameter.

following

may be

an

Elongated

characters

40

controlled,

characters

with

fixed

can

cutting

page is

used

ordinary

Normal

characters

at

be

The

with

size

per

10

line

Other

1.

2.

3.

4. Fast

5. Special

6.

significant

Reliable

Microprocessor

Full

line

carriage

Compact size

features

free-flight

technology.

buffer.

return

line

feed

(5"H x

include:

head.

10"

at

buffer

14-1/2"W x

second.

per

host-controlled

for

11

M

D).

forms

control.

-1-

SPECIFICATIONS

Ribbon

12 per box)

(

Paper

Printing Speed

Characters

Per Line

Print Width

Character Structure

Line Feed Buffer

Feed Repeat Rate

Line

Vertical Spacing

Horizontal

Spacing

20-yard

(Centronics

Cut Sheets

Rolls

with

(3-1/2"

*'

1

Fanfold

28 lines per minute (1pm) at 80 characters

line (cpl)

per

80 maximum

8 inches maximum

pack

zip

Part

(8-1/2-

to

Core

(9

,

)

W

pin-to-pin),

mobius

No.

8-1/2"

2

ply

or

(204

loop

63701468-6003)

wide)

wide

3 ply

74

1pm at

mm)

5

x

20

cpl left

H

diameter

justified

7x7 Dot Matrix

Capacity for

9 line feeds/second

6 lines

10

characters per inch

per

255

inch

pending line feeds.

Parallel Data Input Connector

Code

Character Set

Input Character

Format

Input Data Rate

Input Voltage/Frequency

Power Requirements

#

Size

Weight

40-pin PC edge

Standard

96

US

8 parallel data

Up to

120 VAC

100

watts

14-1/2-W x

127

(

12

lbs.

US ASCII-2

ASCII

9300

+10%

mm)

(5.4

alpha-numeric character codes.

characters/second.

60 Hz

11"D x 5"H?

Kg)

connector

bits.

(368

mm)

(279 mm) x

x

=2-

INSPECTION

SETTING

UP

Visually

Notify

QUICK

1.

2.

SET-UP

Install

paper.

Remove

paper

removed.

inspect

the

guide.

the

common

PROCEDURES

paper

roll

cover

top

printer

carrier

Any

printer

cause

holder

and

Ensure

When

RESET

be

prevent

tween

and

for

immediately

attempt

voids

further

and

check

that

ribbon,

head

turning

ON/OFF

placed

in

erroneous

host

the

prevent

to

signs

of

NOTE

operate

to

the

damage.

roll

restraint

CAUTION

power

switch

ON

the

device

damage

of

any

a

warranty

paper,

on

or

reinstall

then

should

position

received

discrepancies.

damaged

and

fanfold

ribbon

and

off,

the

always

to

communications

and the

the

to

printer

printer.

may

paper,

cover

be-

during

cover

shipment.

single-sheet

or

install

and

packing

has

top

been

3. Place

ON position.

in

4. Connect

Connect

5.

Place

6.

through

7. Place

POWER

power

interface

POWER

paper

RESET

switch

cord

switch

exit

ON/OFF

in

to a

cable

in

slot.

switch

the

3-wire,

to

position

ON

position

OFF

printer

OFF

in

grounded

interface

observe

and

position

place

and

AC outlet.

connector.

receive

to

that

RESET

the

ON/OFF switch

illuminates

LED

data.

Figure

1.

MODEL

-3-

730-1 PRINTER

.

ROLL PAPER

1

Set the

for the roll

2. Refer

3.

Insert

support arms.

4.

Remove

paper

bottom

m

HOLDER

printer

paper

to Figure

support

core hub

roll

of

core and

roll.

\

SLIDE

FOR PROPER

ALIGNMENT

CORE ON

INSTALLATION

on a

2

arms into two

from

flat

holder.

and

squeeze

plain

place roll

AXLE

ROLL

surface with

the

support

holes

end and

provided

insert roller

on holder

£

7

PLAIN END

enough room

arms

as shown

together

at

rear of

PUSH THIS

INTO CORE ENDS

in back

through

with

of the

slightly.

printer

standard

paper

PORTION OF

printer

and

1-inch

feeding

release

from

/

HUBS

PAPER

ROLL

TOP PAPER

GUIDE

PAPER ROLL

HOLDER

PAPER

GUIDE

ARM

PAPER

SUPPORT

ARM

PLATEN

PAPER

ROLLER

PRINTER

CABINET

(CUTAWAY)

FACE

DRIVE

Figure 2. ROLL

PAPER

HOLDER

-4-

INSTALLATION

PAPER

INSTALLATION

Printer

The

cut

type of your

1. Precise

Forms

printer

sheet,

has the

roll, and

paper

application, you should

registration, 6 lines

continuous

wherever

2. The last

registration is critical

line

page when

3.

pinch-feed

In

line spacing

Check the paper for

forms.

appropriate procedure to install

Refer to

single

or

the

sheets/forms.

Selection Guide

unique ability to

fanfold.

Line

being used. To select

consider the

to

fanfold edge-punched

can be printed

using cut sheet

up

paper.

applications when using

vary

can

depending upon

your application

NOTE

When

installing ribbon or

always back print

handle three

common types of

registration can vary

the ideal type

following

inch, can

the

paper. This type

such as in

to

1.6"

roll

the

(40.6

finish

before use

roll

of paper or

guidelines:

be

best

of paper

preprinted

mm) from

paper or

and weight of

procurement of

or

paper, fanfold

paper,

head away

from

paper;

depending on

form for

maintained by using

should

forms

the bottom

be

applications.

of the

cut-sheet paper,

the paper.

preprinted

paper,

the

used

the

.5-

.

Roll

Paper

Install the

1

Remove top

2.

cover

Retract

3.

lever

4.

Push

Feed the

5.

printer

6. Align

straighten

7. Remove

the roll

cover

then

and

head to

fully

pinch-roller

the

paper

under

edges

the

as

skew

any

on the

roll

on the paper

lifting rear

by

slide

the

cover back to

paper/ribbon

counterclockwise.

release

over the paper

the paper

of

drive roller.

free end

the

required.

between paper roll

holder

axle to

THUMB

holder

as

described

edge until latches

disengage front clips.

load position by

lever

guide

towards rear of printer.

arm and through the bottom rear of the

of paper with

and the

align the

paper-drive roller by sliding

paper as shown in

WHEELS

previously.

are

clear

of main

rotating head release

paper-drive roller edges and

Figure 3.

8. Push

Advance paper into

9.

the

through the

10. Check

to

ribbon

print position,

head assembly

paper

upon

as a

type

pinch-roller

printer by

top of

the printer.

position,

and install top

indicate

general rule.

of

paper

being used.

ALIGN

"THIS

Figure

3. PAPER DRIVE

release

remove slack

head-release

Note that

PAPER WITH

ROLL

DIMENSION

lever

forward

turning

if necessary,

cover. Print

lever positions

print-head

either

ROLLER

secure paper.

to

thumbwheel until

head-release

move

position

for

position

paper

numbers

number

may vary

exits

lever

print

on

of plies

depending

of

-6-

Fanfold Paper

1.

Remove the

position (open).

top cover,

retract head

and make

sure

release

lever

is in down

2. Engage

3. Hold

paper onto

paper in place

through

4.

Be sure

5.

Check

to appropriate

ribbon

numbers on

number

of

position may vary

pins

while

the top of the

the paper

supply

position,

print

print head

plies of paper

depending

When

pinch

be

from

using pinfeed

roller

left

printer). This

positive

and

prevents imprinting

third

by

copies of

pressure of the paper-drive

rings on

copies.

of paper-drive

turning

printer.

is feeding

remove slack

position and

assembly

as a general

upon

indicate

type of

NOTE

type paper,

release lever

in the

drive by the

down

multipart paper

the carbon paper

roller

either

at

thumbwheel

properly.

if

necessary;

install

head

rule.

top

cover. Print

release lever

Note

paper being

the

should

position (away

provides more

feed pins

on second and

caused

roller

between the

bottom

until

move

that the

rear

of printer.

the paper

head-release

position

positions for

print-head

used.

exits

lever

Single Sheets/Forms

1.

Push

pinch-roller release

2.

Insert

under

3.

Slide

sheet/form

4.

Match

5.

Pull

6.

Manually

top edge

the

paper drive

sheet/form

rises

up top and

pinch-roller

turn two

printed line.

lever

of sheet/form

roller.

into rear of

through

bottom

release

paper-exit

edges

lever forward

thumbwheels

towards

through

printer

slot.

of paper.

until

sheet is in

rear to the open

opening

under

in the rear of

paper-drive

Straighten paper

to closed

position.

position for

position.

the printer

roller until

as required.

the first

-7-

.

Zip-Pack

ribbon

1. Remove

2.

3.

is as follows:

Retract

Refer

and

4.

Remove

5.

Place Zip-Pack

ribbons are

printer

used

top

Use the throwaway

provided with

performing the

the head

to Figure

by rotating

and

4

unthread the old

the

Zip-Pack from

in printer tray

RIBBON

with the

cover to

push the

ribbon and

the plastic bag.

INSTALLATION

printer.

gain access

NOTE

plastic gloves

the new ribbon

following

the

head-release

steps.

driven roller

discard

as shown in Figure

The procedure

to ribbon tray.

when

lever

fully counterclockwise.

away from

it.

5.

for installing

the

drive roller

the

6.

Pull ribbon

threading

side (See

7.

Hold

shell

8. Remove

9.

Manually

ribbon

piece and then remove

and discard

out

diagram, being

Figure

in place by pressing down

advance drive roller

ribbon

10.

Engage head and

RIBBON SPECIFICATIONS

The

printer uses a

on upper and lower

ribbon

life. The specifications

180°

portions of the ribbon

LENGTH: 20 yards

WIDTH:

THICKNESS:

from both

ends

of

careful to

4).

wrapper by

shell and

plastic strip.

clockwise

install top cover.

mobius loop ribbon

are as

(18.3 meters)

9/16

inch

+

0.0004 inch

Zip-Pack and

position mobius

on

plastic

pulling end

until slack

configuration

on alternate

follows:

inch

1/64

+

0.00025

thread

(14.3 mm

inch

(0.01 mm

according to

loop

twist on the

strip through hole

of wrapper.

is removed from

that allows

printing

passes, thereby

+

0.4

mm)

+

0.0064

mm)

ribbon

left

in

increasing

Ribbons

number for a package

may be obtained from

63701648-6003.

is

Centronics

_o

packages

in

The ribbon

of

one dozen. The

color

is black.

part

DRIVE

ROLLER

(MANUALLY

ONLY

TO REMOVE SLACK)

ADVANCE

PAPER/RIBBON

POSITION

LOAD

CW

ZIP PACK

RIBBON

TENSIONER

RIBBON

ARM TO THREAD

OPEN

RIBBON. INSURE

RIBBON IS

THE

RELEASE

DOWN ALL

WAY. THEN

ARM

THAT

Figure 4.

RIBBON

THREADING

SHELL

DIAGRAM

Figure 5.

ZIP-PACK

INSTALLATION DIAGRAM

_

9

.

USING

THE

•

OPERATION

PRINTER

1

Be sure

of

Place RESET

2.

prevents

paper

that a

has been installed.

the

ribbon

ON/OFF switch in

printer

is

from

When turning power on

RESET

be placed in the

ON/OFF

prevent erroneous communications be-

tween

and to

3. Place

visible through

4. Place RESET ON/OFF switch

accept

5. To

place

POWER

ON/OFF switch

paper-exit slot.

data.

turn

printer off,

POWER ON/OFF switch in OFF

host device

the

prevent damage

place RESET ON/OFF switch

installed in the

ON position. (Refer to Figure 6.)

the

printing

and keeps

printer

it

and an adequate

"off-line".

CAUTION

off, the

or

switch should always

ON position

and

to

the printer

the printer.

in ON position. "Power On" LED should

in the OFF position. Printer is ready to

ON position.

in

position.

supply

This

be

Then,

HINTS AND TIPS

• Always plug

• Do not leave or place objects

• Do

• Use

not subject

a sudden change in temperature, to dust, or to extreme shock.

to

only a dry, soft cloth

detergents or

• Avoid touching print-head print wires when handling paper or

printer into a 3-wire grounded outlet.

printer

on any

temperatures below

to

clean printer surfaces. Do not use

to

part of printer.

+40

°F (4°C)

chemicals.

during operation,

ribbons

• Periodically clean ink

from

interior.

build-up

from

ribbon guide

path and remove paper dust

harsh

changing

-10-

00821

RESET

ON/OFF

REMOVABLE

(Provides access to

ribbon and

load paper.)

SWITCH

TOP COVER

change

POWER SWITCH

FRONT

RED LED

Indicates

slot.

(Visible

power is ON

through paper

~+5

exit

volts.]

POWER

CORD

PARALLEL

CONNECTOR

(40

Figure 6» OPERATOR CONTROLS

INPUT

pin edge connector)

REAR

PINCH ROLLER

RELEASE

(Used to load

LEVER

paper.)

PRINCIPLES

OPERATION

OF

All logic,

printed

mounted on

forward

the

column.

advances

actuated.

times

except

carriage

host

and

The

device sense,

+24

host

control,

circuit

a

direction

The paper

paper one

The ribbon

position.

for the

VAC

device

strobe signal

achieved

using

printer logic.

HOST

DEVICE

board

carriage

drive

line

when the

+

transmits

the

to

the busy,

PRINTED CIRCUIT

8

DATA

-BIT

DATA STROBE

I

BUSY

power supply

drive,

and

within the

assembly

only

driven

(left

roller is

(1/6

drive

carriage

power supply

The

regulated

12V

ribbon

inch)

motor

assembly

drive

8-bit

printer logic.

demand,

BOARD

•

CPU

•MEMORY

•CONTROL

LOGIC

printer

(Figure 10).

by a DC

right),

to

driven by

each time

(AC) moves

actuates

provides

motor drive,

for

motor.

parallel (US

Control of

acknowledge signals

and

circuits

motor.

are

Printing is

printing up to

a line

the

ribbon

feed

line feed

past the

sensor

the

+5V regulated,

+17

the

data

transfer

IPRINTER

• MECHANICS I

DRIVE

ASCII)

SOLENOID

FWD/REV

contained

print

The

seven

solenoid

solenoid is

at

solenoid

for

signals

generated

on one

head

is

performed in

dots per

which

print head

the leftmost

at all

+5V EXT SENSE

drive,

andadata

data

of

-PIN

7

PRINT

HEAD

CARRIAGE

DRIVE

MOTOR

(DC)

by

is

the

00819

for

«

printer accepts

The

buffer

code

content

until either

received. If

is

of

achieved by

against the

carriage

drive motor forming

completion

paper is

advanced one

DEMAND

ACKNOWLEDGE

EXT SENSE

+5V

Figure

7.

and stores input

the

the buffer is

the holding

energizing

ribbon, paper,

of printing

line by energizing

•

DRIVE

CIRCUITS

I

POWER

SUPPLY

730-1

buffer is

solenoids in

the

PRINTER BASIC

printed.

and platen as

the characters

print

head is

+5V

character

filled or

the print

the

moved to the left

the

LINE FEED

VAC

24

BLOCK

carriage return

a

a CR

DIAGRAM

data in

code

an

Printing of the

head which drive

print

in

line

head

a 7x7

dot-matrix

feed solenoid.

LINE

FEED

SOLENOID

RIBBON

DRIVE

»-

MOTOR

(AC)

80-character

(CR)

received,

is

characters is

circular

moved by the

is

pattern.

margin

I

holding

control

the

pins

Upon

and the

-12-

Line feed (LF) control codes Each line feed code received

printer has a special which can

at the same

second).

Additional

buffer. Line feed

intermixed,

data

The initial

line feed

however, all

line

of data.

transfer

line feed buffer,

line feed commands.

rate as character

LF code causes

codes received are stored

codes and character data

line feeds received

received by the

causes

the

paper

separate from the

immediate

an

printer control paper

to be advanced one

holding

LF control codes are

data

(up to

advance

a

as

sent to the

are performed before

9300

characters per

of one line.

count in the

priinter may be

movement.

line.

buffer,

The

received

line feed

printing the

Automatic

removing

function is disabled,

code is received

line of

not advanced. The

least

or overprinting will

Line feed

feed code

desired to move

CR control code

Elongated characters can

printing each column

by

line

feed upon

resistor R34 on

data,

one

the

LF control code

codes

may

moves the paper

the paper 12 inches, 72 line feed

is sent.

completion of printing

the printer

the first line

a buffer

or

print

head

second line

full condition

is returned to the left margin and

(and subsequent lines)

preceed each CR control

occur.

be used for limited

one-sixth of

be printed which are

of dots within each character

characters are also twice as wide.

characters per inch

and elongated character

Elongated characters

sequence (or data bit 8

SI code sequence

automatically

terminated at

sequence causes

Control code

be

printed

sequence ESC,

normal

(cpi) from

styles.

are initiated by

logically

data

(or

all data following

size. Elongated

bit 8 logically low).

any number of times within a

printing of elongated

by

the ESC, SO code sequence preceeding

characters

in

the next line

characters, and

10

the

SI causes all data following the

line. The

will be printed normal

logic

of

printer

data

paper

will be printed when

occurs. After

handling

an inch.

double

This effectively

cpi to 5

cpi.

using the escape code ESC,

high)

end

and terminated

a

of

line. Reception

the code sequence to

characters may

end of a print

unless elongated characters

the data

each

line

circuit board.

may

be disabled by

If this

a CR control

printing the first

paper

the

of data must have at

code or buffer full condition,

functions.

Thus, for example,

codes are required

width

twice.

characters

Each line

if

before

Spaces between

is

it

formed

halves the number of

Figure 8 shows

by the escape code

Elongated characters

of

the normal

SO code

an

ESC SO code

ESC,

are

be printed elongated.

code

be initiated and terminated

line terminates

sequence to

are initiated

for the next line, the

size.

a

-13-

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(

)

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Figure

8.

730-1

PRINTER

-14-

CHARACTER STYLES

Figure 9 shows the printer interface

sent to the printer

the host device. Within 50 nsec following

by

STROBE signal a BUSY signal

host device.

processing the

will be accepted

The

BUSY signal informs the

input

by the

data an acknowledge (ACK)

the data sent by the

nsec following the leading

indicating that the printer

DEMAND

signal is also generated

device. The DEMAND

(positive) indicates that

strobed by the DATA STROBE

is

generated

is

data

and that

rinter. After completion

p

signal is sent

host device has be

edge of

again ready

is

by the

signal is the inverse of the BUSY

the printer is not busy and is ready to accept

timing. Each set

no

the

data.

MTA

"™

Jis+aH-Jsfc

signal

the trailing

by the printer

host device that

additional data

of data

sent to the

which

from the host device

bits

edge of the DATA

is sent to the

the printer

of processing the input

to

the host device indicating that

en

accepted and processed. Within

ACK signal the BUSY

accept

to

printer and

additional

available

is

signal is

signal and

**

J^t-i-t^"

(1-8)

rinte

p

is

terminated

input

to the host

data. A

when present

r

50

DATA

STROBE

ACK

BUSY

DEMAND

The

time

between

edge of the ACK

be performed

which

do

For LF control

msec +10,

by the printer.

fill the line

not

codes which

-0%.

approximately 10%

occurs which

extends the time from a nonimal

Figure 9. INTERFACE

the

trailing edge of the DATA STROBE

signal (data transfer

normal

For

feed buffer, the duration

fill the line feed buffer, the maximum

The maximum time

of the normal data

for carriage return codes is

\h

•as--"

-th

-!V

S5T--

Hi

h-

Hp^

lb

•

usee

100

do not fill tha line feed buffer.

is for

TIMING

cycle

time)

data inputs and LF control codes

transfer cycles

100

usee to

reception and line feeds

data

is

1

the maximum time i

For

10 msec

line

+10%. -0%.

signal and

varies

with the functions to

nominally 160

is

2.6 seconds. In

a microprocessor interrupt

approximately

that

feeds

that

the leading

usee.

time

is

200

110

usee.

Figure 10

turned

stabilize.

and

the printer remains

signal

shows

on, approximately 20 msec

acknowledge

the

Within 30

is then terminated and the

pulse indicating that the

to accept data.

signal is sent

Data should not

to the host device.

timing on power-up. When power is

is required for internal voltages

msec

after

in the BUSY condition for the

power

turned on the BUSY signal is

is

printer generates the first

printer is no longer

be sent to

BUSY,

the

-15-

is on line,

printer

170

acknowledge

and is

until the first

initially

(+5V)

to

generated

BUSY

The

rea

ACK

dy

ON

POWER

SWITCH

5V

BUSY

ACKNLG

LINE

OFF

+5V

WVWWA

W/M////M

ON

OV

indeterm.nate

COND.T.ON

20MS

H

-30MS-

200MS

ACKNLG

1ST

(PRINTER

ON

PULSE

LINE)

Figure

The Power

printer. When

indicates that

ON/OFF

power

the

printer modes of operation.

placed in a local mode

the printer electronics are reset,

placed

is

data

in the OFF

returned to the left margin,

be sent by the host device. If

to

when the printer is processing

printing

the line of data,

10. ACKNOWLEDGE TIMING ON

switch controls

turned on, an LED visible through

is

+5

volts is active. The

the application of primary power to the

When placed

in

of operation, a BUSY signal is sent

and the print buffer is

position, the printer electronics are

and the

BUSY

the switch

a line of data,

return the print head to the left margin,

reset the printer electronics and clear the

performing

multiple line

feeds at

time when the switch is

the

position, the line feed operation currently being

and

the remaining

line

feeds will be processed

POWER-UP

RESET ON/OFF switch controls

ON

the

signal is discontinued

the

print buffer. If the

performed will be

when the printer is

the on-line mode. The RESET ON/OFF switch should be

when turning power

signals

off.

occur during the periods when

can

the printer on or off as extraneous

to

power

is

CAUTION

Actuation

of the On Line/Off Line switch

results in loss of data contained in

print

buffer.

the paper exit slot

position,

the printer is

to

host device,

the

cleared. When

reset, the print

allowing

is

placed

the ON position

in

printer will complete

then

printer

placed in the

completed

returned to

placed in

the

acknowledge

initially turned

position

ON

(ACK)

on

the

head

is

ON

or

16-

)

PRINTER

INTERFACE

PRINTER INTERFACE CONNECTIONS

Printer

40-pin printed

A

Interface Connector

circuit

edge card

connector located at

printer provides the means for connecting

mating connector

procured from Centronics (Part No.

connectors

The

physical and electrical characteristics,

are 3M

pin-outs of the

for preparing a customer

31230032). Two

(Part

No.

3464-0001)

and T&B

printer interface connector

the left rear of the

the printer to an input device. A

supplied interface cable may be

alternate sources

of

mating

Ansley (Part No. 609-4015M.)

pin orientation, and connector

are shown below.

15°

H*

TYP

Figure 11. TOP

PIN SIGNAL

1

3 DATA 5

7

9

11

13 15

17

19

21

23

25 27

29

31

33 35 +5V

37

39

DATA

STROBE

BIT 1

DATA

BIT 2

DATA BIT

DATA

DATA DATA

DATA

BIT 4

BIT 5 BIT

BIT

BIT 8

3

6

7

ACKNOWLEDGE

BUSY

ALWAYS ALWAYS

SIGNAL

NOT

SIGNAL CHASSIS

LOGIC

LOGIC 1

GROUND

USED

GROUND

SIGNAL

NOT

USED

NOT

USED

0.02x45°

CHAMFER

PRINTER

(ACK)

(GROUND)

(+5V)

(P.S. ON)

VIEW OF PRINTER

INTERFACE

CONNECTOR PIN-OUTS

2

4 TWISTED PAIR

6

3

10

12

14 16 18

20 22 TWISTED 24

26

28 ALWAYS

30

32 PIN 34

36 DEMAND

38 NOT 40

KEY BETWEEN

0.035

PINS

36 & 38

PINS

ON .100

INTERFACE

_

,

4-S

CONNECTOR

SIGNAL

TWISTED PAIR

GROUND

(DATA STROBE)

GROUND (DATA BIT

TWISTED TWISTED PAIR

TWISTED PAIR

PAIR

GROUND (DATA BIT

TWISTED PAIR GROUND (DATA

TWISTED PAIR GROUND TWISTED PAIR

TWISTED PAIR

NOT

USED

LOGIC

GROUND GROUND (ACKNOWLEDGE)

PAIR

GROUND (BUSY) GROUND

1

(DATA BIT

DEMAND

(

GROUND

32 JUMPERED

FOR SENSING PRINTER

TO PIN 34

CONNECTED

USED

NOT

USED

BIT

1)

2)

3)

4)

5)

6)

7)

8)

-17-

^X3

HI

J.lvnlf.

"•"•'

°

volts

0.4

LO

6m

I

•

a

0—

—

O^

Ml

;.4,nl|s

400,,.,

I" 4

/ '"'>

...It .

•

O

DRIVER R?

All

input/output

Figure

12.

smn.ilsair

TTL

INTERFACE

compatible.

DRIVERS

INPUT/OUTPUT SIGNAL DESCRIPTIONS

Data

The

Strobe

data

(Host

strobe

to transfer the incoming

the printer. The pulse

relationship of the

the leading

and

Generated)

(DATA STROBE) signal

data

duration

leading and

trailing edges

from

must

trailing

of the input

is

the host into

be

the interface timing diagram (Figure 9).

Data

The

Lines

eight input

the US ASCII character

indicated by positive going

is

(Host Generated)

data lines

data and control

provide the means

signals.

R

IV!

Cf

AND RECEIVERS

a negative going

the

electronic circuitry of

a

minimum

edges of

data

to

code data.

of one

the DATA

signals must be as

transfer bits 1

The presence

pulse

which

microse

is

cond.

STROBE signal with

shown

through

of logic one

used

The

in

of

8

bits

Acknowledge (Printer

acknowledge (ACK) signal is

The

the printer has processed the

data

can be sent

Generated)

a negative going signal which indicates that

latest

to the printer until

occurred. If the printer receives a

the printer print

pulse will

not

feed buffer becomes

Busy (Printer

The BUSY signal is

printer cannot accept

buffer or line

occur

until after the line

only

Generated)

a positive

new data.

edge of every data strobe

acknowledge pulse.

signal

is

high.

No new data can be sent

partially full.

pulse

feed buffer becomes full, the acknowledge

going signal

The BUSY signal

and remains high until the leading edge

Demand (Printer Generated)

The DEMAND signal

the

DEMAND

signal indicates

+5V Signal (Printer

the

is

Generated)

inverse

of

that the

data transferred from

the leading edge

the host. No new

of

the ACK pulse has

carriage return (CR) control code, or if

has been printed or

which

indicates the time

goes positive

until

on the trailing

the line

when

the

of the

to the printer while the BUSY

the

BUSY

signal. When

printer can accept

high (positive),

data.

+5V

The

signal

operating in the

purposes only and it

(I/O Connector,

printer.

must not be used

The +5V

indicates that the

35)

signal is

intended to be used

to provide power to external

-18-

+5V

power supply is

for signal

equipment.

HOST-GENERATED

CONTROL CODES

Control

the input

code data

data lines.

instructions

and

control code

codes

is

described

Mnemonic

LF

CR

ESC SO

ESC,

Line

Each

advanced

data

sent

SI

Feed (LF)

line

to the

(up

feed (LF)

one

to

printer,

the additional

If more

more

data

than

can be

processed and

character

processed

data

before

is sent to

by the

printer. The

sequences

in

Decimal

10 13

27,14

27,15

Code

code

line. Line

9300

characters

line feed

255 lines

sent

the

line

can

be intermixed,

the next

the printer

Control codes are

recognized by the

detail

Octal

012

015

the

in

Code Hex

033,016

033,017

received by

feed codes

per second.)

the initial

codes are

feeds are

to the printer

line feed

received

feed buffer

however

line

is printed.

along

sent

as data,

following is a

printer.

following

paragraphs.

Code

0A

0D

1B,0E

1B,0F

the

printer

are

received at

When

multiple

code is

stored

in the

the

printer will

until pending

is partially

all

line feeds

with

character

but are

summary

of the

Each

of the

Function

Full

Line

Print

Feed

Command

Start Elongated

Stop Elongated

causes

the

the paper

same rate line feed

acted upon

line feed buffer

line feeds have been

full. Line

in the buffer

immediately

busy,

go

feed codes

code data

interpreted

control

Forward

Characters

to be

as character

codes are

as a count.

and no

will be

via

as

codes

and

Carriage

Return

The carriage

is

received

received^

printed.

and

the line

the

content

ESC,

The

elongated

be

character

printed

(or

SOy ESC,

ESC, SO

sent to

bit

8

normal

characters

data

logically

characters.

unless

character

an ESC, SO

data

(CR)

return (CR)

by the

Upon

If

the

is

of the

SI

code

the printer

The

printer and

receipt

print buffer

printed.

print

Code

sequence

#

(up

to 40

size. The end

for that

Code

code serves

of a

The

buffer is

Sequence

(or bit 8

(doublewidth

at any

characters.)

low)

causes all data

line of

sequence

line.

as

stored

CR

code,

is filled,

print head

printed.

and Data

logically

characters.)

time during

of

a print line

data

will be

is

received

a

print command

in the

the

print buffer

contents

a CR

is returned

code is

Bit 8 Control

high) initiates

The ESC, SO

the transmission

Reception

of an ESC SI code

following

terminates

printed

during the

to the

printer. Data

until a CR code

of the print

buffer is

generated by the

to the left margin

printing of

code sequence may

of a line of

the

code sequence to be

printing of elongated

as standard-width

transmission

is

printer

after

sequence

characters

of the

-19-

US

ASCII

CODE

CHART

Figure

13 is a

characters

various

characters,

which

Indicates

scognized

Printer.

US

may be

^7

k\

ASCII

and the

h

>>4

code

chart

printed by the

control

>v

*»1

2

t

1

1 15

\Column

Row^s.

b

"3

t

1

1 4

1 1 5

1 1

1

1 1

1

1 1

1

1 1

1

which

shows

730-1

codes recognized

°o

~T^

°°i

1

NUL DLE

STX

ETX

DC1

DC2 DC3

1 SOH

2

3

EOT DC4

ENQ

NAK

SYN

6

7

8 9

10

11

12 FF FS

13

14

ACK

BEL ETB

BS

HT EM

"LP

r

VT

r

CR

r

so

si US

r

CAN

SUB

ESC

GS

RS

standard 96 US

the

printer,

% \

2

SP

! 1 A

"

#

$

%

& 6

'

(

)

•

+

,

-

/

the codes

by the

'o

4 5

3

@

2 B

3

C

4

D

E

5

F V

G

7

H

8

I

9

J

K

;

L

<

a.

M

N

>

?

ASCII

for the

printer.

'io

\

P

Q

R b

S c

T d

U

w

X

Y i

Z

[

\

]

t

4-

\

7

6

4>

P

a

q

r

s

t

u

c

V

f

w

g

X

h

V

z

J

k

1

m

1

-¥

n

I

Figure

/

y>

£~

L*

CONTROL

CODES

s

L*

C

^—

i 3

T

ASCII

US

13,.

CODE CHART

"^

-

STANDARD

tj

-20-

MAINTENANCE

PREVENTIVE

Routine

insure

consists

preventive

MAINTENANCE

preventive maintenance should be

satisfactory performance of the printer. Preventive maintenance

of periodic cleaning, inspection,

maintenance and

maintenance may

upon

used.

printer application, operating

the

performed

and

at regular intervals to

lubrication. The recommended

suggested frequencies are shown

required more

be

or less frequently than

environment, and type of paper/forms

WARNING

When performing

procedures, the

must

input plug must be disconnected. High

be in the OFF

voltages are

within the

printer

preventive maintenance

POWER

present

ON/OFF switch

position

some

in

when

the

and the AC

locations

printer is

turned OFF.

PREVENTIVE MAINTENANCE

below*

indicated

Preventive

depending

ITEM

External

Cleaning

Internal Inspection

Print Head and

Carriage

Assembly

Print Head

General

Cleaning

FREQUEN

As Required Clean

CY PROCEDURE

mild

lint-

Each Ribbon

Change

Visually inspect

for loose

hardware, chafing

badly worn

Each Ribbon

Change

Each Ribbon

Change

6 Months

After

bristle brush

dust

and carriage

Using a soft, clean,

gently remove all dried ink from

front of the print head.

Perform

Clean

mild detergent and water, and a soft,

lint-free cloth. Using a

cleaner with a

carefully vacuum interior of

taking

all external surfaces using

detergent and a soft,

cloth.

free

interior

wires,

or damaged parts.

connectors, and

cables, and

of

removing ribbon, use a

carefully remove

to

and residue from print

assembly.

clean,

of printer

light-

head

lint-free cloth,

all of the above

platen surface using a

the

procedures.

vacuum

soft

brush

attachment

printer

care not to

damage printer.

a

the

-21-

«

ITEM

Carriage

Guide

Bars

Paper

Drive

Roller

TROUBLESHOOTING

PREVENTIVE

MAINTENANCE

FREQUENCY

6 Months

6 Months Using

(cont'd)

PROCEDURE

Move

printer. Apply

paper drive roller After cleaning,

print head

to left

several drops

lubricating

free cloth and

oil

to

lightly

guide bars to remove

residue. Move

side of printer and

a lint-free cloth,

print head to

apply one

light lubricating

oil to both paper

clean,

rub carriage

any

repeat

and plate

roller end plate bushings.

paper

allow

roller using the thumbwheels to

the oil to

seep into the bushings,

side of

of

lint-

build-up of

right

procedure.

clean the

bushings.

drop of

Cycle

the

The troubleshooting

the probable

after

by

performing the

qualified service personnel. Note that the warranty

causes,

to repair the printer result

chart below

and

the

remedies.

remedies

in further damage.

lists

indicated, the equipment

some

malfunctions which may

If the equipment remains

WARNING

When

performing troubleshooting

cedures, the POWER ON

/OFF switch

must be in the OFF position and the

input

AC

plug

High voltages are present

locations

must

within the

be disconnected

some

in

printer when the

printer is turned OFF.

TROUBLESHOOTING CHART

TROUBLE

Print too light.

PROBABLE

CAUSE REMEDY

Print head release

open

partially

or

lever

open.

occur,

inoperative

should be serviced

voided

is

if attempts

pro-

.

Rotate print head release

lever clockwise to

printing position.

normal

Roll

Paper

/Cut-

sheet

paper does not

advance properly.

Worn

Pinch

in open position.

defective ribbon.

or

roller release lever

-22-

Replace ribbon

Pull pinch roller

lever forward to

position.

release

closed

•

TROUBLESHOOTING

TROUBLE PROBABLE

Ribbon does not

feed properly.

Ribbon

properly loaded.

Ribbon

engaged

Printer completely

inoperative.

AC

input

connected.

Paper

Fuse F1 blown.

CHART

(cont'd)

CAUSE

twisted

or

im-

drive rollers not

properly.

plug

jam.

not

REMEDY

Check ribbon threading

correct as required.

Open and release driven

roller. Rotate

roller clockwise

proper movement

Connect AC

to power source.

input connector

Remove power

clear paper

condition

of

driven

to assure

ribbon.

of

and carefully

jam. Check

ribbon

before

returning power.

Check

is lit

through

If

not lit, replace

F1.

"Power On"

if

by

looking down

paper exit

LED

slot.

fuse

and

Power applied/data

sent-printer does

not print.

Cable between input de~

vice and

printer not

connected.

RESET

ON/OFF

switch

in

ON position.

Check that

both ends

cable are properly

connected

connectors at

data

of

mating

to

connectors

Place switch in OFF

input

position.

-23-

.

•

DISASSBMLY

In order to replace

return function

Figure

1

Place

from

2. Remove

cover

OF COVER ASSEMBLIES

fuse

it

is

14

proceed as follows:

and

POWER

ON/OFF

power source. Disconnect

top cover by lifting

and then slide cover towards rear

clips

3. Unthread the ribbon

in

ribbon by turning

the two

Phillips-head screws at the front

4.

slack

Release

three Phillips-head screws

Phillips screwdriver.

5.

Gradually

the front of

6.

Reach

connector

raise the

the cover.

under the body

from

connector

F1

or

necessary

switch in

from the

disable

to

disassemble

to

OFF

data

position and disconnect

the auto line feed on carriage

input

connector.

rear edge until

of printer to disengage front

print head carriage

the cover assemblies. Refer

latches are clear of body

ribbon drive roller knob clockwise.

at the rear of the printer

body cover until there

is

cover and disconnect the ribbon

JO

02 on the

logic

PC board.

assembly/

the printer and

of

using a

enough room

drive motor cable

AC

input plug

then

take

No. 1

to reach under

to

up

the

7.

Keep the

to one

8.

To reassemble

body cover

side.

level to prevent ribbon from

printer,

unthreading and set cover

reverse procedure.

00822

RIBBON

ROLLER

DRIVE

KNOB

BODY

COVER

RESISTOR R34

REMOVE

^UTO LINE FEED

CARRIAGE RETURN

TO DISABLE

ON

RIBBON

CABLE CONNECTOR

DRIVE

MOTOR

TRANSFORMER Tl

Figure

14.

BASE COVER

HIGH VOLTAGE SHIELD

FUSE Fl, 1A

SLOW BLOW

.25D x 1.25L

DISASSEMBLY OF PRINTER COVER ASSEMBLIES

-25-

FUSE REPLACEMENT

Fuse F1

adjacent to

and proceed

1. Disassemble cover assemblies

located on

is

the power transformer and POWER

as follows:

the forward

to gain access

the base cover. (See procedure

2. Loosen

screw,

located on right side

screwdriver.

3. Remove the

clear plastic

high

input circuits.

4. Remove and replace

5.

Reinstall the high voltage

the shield

6. Tighten the Phillips-head screw

7.

Reassemble

DISABLING

OF AUTO LINE FEED ON CARRIAGE RETURN

under the

is

the

cover assemblies.

the

defective

shield. Make sure that the

flat washer.

right-hand

for disassembly

of transformer

corner

ON/OFF

to logic

of the

switch.

of cover

using

voltage shield covering

fuse.

to secure the shield

logic P.C.

Refer

P.C.

board

assemblies.)

a Phillips

the

fuse

slotted

and

transformer.

board

to

Figure 14

mounted

and AC

portion

on

of

The auto line feed

resistor R34 on the

Figure 14

1.

Disassemble cover assemblies

and proceed

base cover.

2.

Locate resistor R34 and

chip,

IC

3. Bend

4. Reassemble the

using side cutters.

resistor upward away

The auto line feed

a new resistor (R34, 270

and wicking braid

new resistor in place.

on carriage return function may

logic P.C. board. To disable this

as follows:

(See procedure

cover assemblies.

on carriage return function may

ohms, 1/4

or a

solder

Before installing the resistor, trim and form leads so

they do not extend more than

to gain access

for disassembly of cover

cut the lead that

is most distant from the

from P.C. board and cut

watt).

Use a

sucker to remove old

inch through

1/8

the printed circuit board.

be disabled

function,

to logic P.C. board mounted

by removing

refer to

assemblies.)

large

second resistor lead.

re-enabled

be

25

to 35 watt soldering iron

solder. Then,

installing

by

solder the

on

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