Sams STAR NR-10 Service Data

09068

HOWARD

W.

SAMS

SiCOMPANY

COMPUTERFACTS

8

Technical

Service Data

STAR®

MODEL

NR-10(VERSIONS

1,2,3)

PRINTER

FEATURES

COMPLETE

SCHEMATICS •

PRELIMINARY

SERVICE CHECKS

•

TROUBLESHOOTING TIPS

•

EASY-READ

WAVEFORMS

• REPLACEMENT

PARTS LISTS •

SEMICONDUCTOR CROSS-REFERENCE

SflR

S

COMPUTERFACTS

STAR

MODEL

NR-10(VERSIONS

1,2,3)

(/)

©

EC

2

|>*

o

PRELIMINARY

SERVICE

CHECKS

This data provides

the user with a time-saving

service

tool which

is

designed

for quick Isola-

tion and

repair of Printer malfunctions.

Check all Interconnecting cables

for

good

connection

and

correct hook-up before making

service checks.

Always turn Printer Off before connecting or

disconnecting

connectors, boards

or

Computer.

Replacement

or repair of

the Fuse Board,

Control Board,

Control Panel Board or

connectors may be

necessary after malfunctions

have been Isolated.

TEST

EQUIPMENT

Digital Volt/Ohm Meter

Logic

Probe

TOOLS

Print Head Cleaning Equipment

Contact and

Switch Cleaner (non-spray

type)

Phil

lips Screwdriver

Low Wattage

Soldering Iron

Desoldering

Equipment

REPLACEMENT PARTS AND

DESCRIPTION

Control Board
Control Panel

Board

Fuse Board

CM1 Carriage

Motor

DB1

Bridge

Rectifier

DB2 Bridge

Rectifier

Fi Fuse

4A

125V

AC (Fuse Board)

F2

Fuse 5A 125V

AC

(Main Board)

F1,3,4,5 Fuse

3A

125V

DC (Main

Board)

IC1 Voltage

Regulator

(5V)

LF1

Paper

Feed

Motor

Ml Home Position Sensor

M2

Paper End Sensor

M3 Release Lever

Switch

M4

Automatic

Sheet Feeder Switch

PH1

Print Head

SW1

Power

Switch

T1

Power Transformer

TR1 Voltage Regulator 3.6V

TR2

Voltage

Regulator

39V

XTAL1

14MHz Crystal

SAMS.

Howard

W. Sams

&

Co.

4300

West

62nd Street,

P.O.

Box

7092,

Indianapolis,

Indiana

46206

U.S.A.

The

listing

of any available replacement

part herein

does not

constitute in

any case

a

recommendation,

warranty or

guaranty

by

Howard

W. Sams

& Co. as to the quality and suitability

of

such

replacement part.

The numbers of these

parts have been

compiled from

information furnished

to Howard

W. Sams

& Co.

by the manufacturers

of the particular

type of replacement

part

"sted.

90CP19104

DATE

2-90

Reproduction

or

use, without express

permission,

of

editorial or pic-

torial

content, in

any manner,

is prohibited.

No

patent

liability is

assumed

with respect

to the use of the

information

contained herein.

©

1990 Howard

W. Sams & Co.

4300 West 62nd

Street, P.O.

Box

7092, Indianapolis,

Indiana

46206

U.S.A.

Printed in

U.S.

of

America

PRELIMINARY

SERVICE

CHECKS

(Continued)

POWER

SW1

1

20VAC

190mA AC

ADJUSTING

PLATE

SLOT

INTERCONNECTING

DIAGRAM

iNTERCONNECTING

DIAGRAM

XI

PRELIMINARY

SERVICE

CHECKS

(Continued)

CONTROL

BOARD

X

© ©

cot

cm

x

XTAL1

v,--\

ZJ

39¥

©

CONTROL

BOARD

III

PRELIMINARY

SERVICE

CHECKS

(Continued)

GENERAL

OPERATING

INSTRUCTIONS

PRINTER

SELF-TEST

Printer has a short

and

a

long Self-Test.

Short Self-Test prints

six lines

of 80-column

text

In

Draft

mode, then

stops. Short test

Is

started

by loading

paper and closing the

cover,

then

holding ON

LINE button down

while

turning

Printer

On.

Long Self-Test prints

80-column text In

Draft

and Near

Letter Quali-

ty

modes

In both

Standard

Roman

characters and

Italic

characters.

The long test

Is started

by

holding PAPER FEED

button

down while

turn-

ing Printer On.

The

long test continues

printing

until Printer

Is turned Off.

PANEL

CONTROLS

Cover

and Paper

switches

must be

activated for

the

printer to

go

ON

LINER. When ON LINE

Indicator LED Is On,

Printer

Is ready to

receive

data from Computer.

The MODE, PRINT

PITCH, TOF, and PAPER

FEED buttons are

disabled

when Printer

Is ON LINE. Pressing ON

LINE

button once stops

Printer from receiving

data from Computer and

activates the other

buttons.

Each time MODE button Is

pressed print mode

changes

between DRAFT

and NLQ. Pressing the

PRINT PITCH

button

cycles

thru Proportional,

80,

"96

and

136.

MODE

and PITCH selection Is

Indicated

by

Control

Panel LEDS.

Pressing PAPER

FEED

button advances paper one

line. Pressing TOF

button advances

paper

to

top of next

page

or form (Form Feed). Printer

has a

forward and reverse

microfeed

function

to

help

in

aligning the print start position.

To forward

microfeed, put

Printer Off

Line

then

hold

ON LINE button

down

and press PAPER

FEED button.

To reverse microfeed hold ON

LINE button down and press

TOF

button.

Margins can be set

while

printer If OFF LINE.

For left

margin hold MODE

down and press

TOF

until

the prlnthead reaches

the desired

posi-

tion.

For right margin

hold

MODE down

and

press PAPER

FEED

until

prlnthead

reaches

the

desired

position.

To make the current paper

position

the Top of

Form, hold PRINT PITCH down

and press TOF.

To disable software control

of

MODE and

PRINT

PITCH, hold either or both

buttons

down while

turning

Printer

On.

Button

selection will

work normally. To select

Italic mode

and

disable software

control of character

style,

hold the

TOF

button down

while turning

the

Printer

ON.

A

hex dump

can be

performed

by holding PAPER

FEED and MODE buttons

down while turning

Printer On. Printer will print

contents of

print buffer In hex form.

DISASSEMBLY

INSTRUCTIONS

UPPER

CASE UNIT REMOVAL

Remove Paper

and Printer

ribbon.

Disconnect

power

and remove

the Platen Knob.

Remove

the

Interface cover,

and remove

the

Parallel

Interface Board

by

pulling

It straight

up.

Remove the two

screws

securing

the Upper

Case.

Lift the back of the

Upper

Case slightly and

push it towards the

front

of printer to

separate the tabs

of

Upper

Case

from

the Lower

Case.

Disconnect

chassis lead

to Control

Panel and Connectors

(CN2

and CN3). Remove

the Upper Case.

CONTROL PANEL BOARD

REMOVAL

Remove the Upper

Case

unit, remove

the

tapping

screw

securing the

Cover

Switch.

Remove four

screws

securing

the

control

panel board.

Remove the Control Panel

Board and the

switch

out of

the Upper

Case unit.

PRINTER MECHANISM

REMOVAL

Remove

the

Upper

Case. Remove

the

plastic

door

covering the

ribbon

cable

and disconnect

the print Head

Cable

(CN11) from

the

Control

Board.

Remove

four

screws

securing the

Printer

Mechanism

to the

Lower

Case. Dis-

connect Connectors

CN6,

CN7, CN9

and CN10 from

the

Control Board.

Lift

the Printer

Mechanism

out of Lower Case.

CONTROL

BOARD REMOVAL

Remove

the

Printer

Mechanism

and disconnect

the

power

supply

connector

CN1. Disconnect

the

Fan

connector

CN4. Remove

eight screws

fastening

the

Control Board

to Lower Case.

Lift

the

Control

Board out

of the

Lower Case.

PAPER

FEED MOTOR

REMOVAL

Remove

the

Printer

Mechanism. Remove

two

screws

holding

the Paper

Feed Motor to

the

Printer

Mechanism.

Remove the

Paper

Feed

Motor.

CARRIAGE

MOTOR REMOVAL

Remove

the

Printer

Mechanism. Remove four

screws

securing

the

Carriage Motor Holder to

Printer

Mechanism.

Remove

two screws

fasten-

ing

the

carriage motor

to holder

and

remove

carriage

motor.

When the

carriage motor

Is

replaced,

adjustment

of Timing

Belt Tension Is

required.

PRINT

HEAD

Remove

the

Printer

Cover and ribbon cartridge.

Remove

the hook holding

the Print Head

In

place and

pull up the

Print Head. Remove the

Print

Head

Connector

Cover mounted to the

frame,

then remove

the

Print Head Cable

connected

to CN11 on the

Control Board. When

a

new Print Head

is

installed,

perform the

Print

Head Gap

Adjustment.

IV

PRELIMINARY

SERVICE

CHECKS

(Continued)

MISCELLANEOUS

ADJUSTMENTS

PRINT

HEAD

GAP

Set

Adjustment

Lever

to

position

1.

Measure

gap

between

Platen

and Ribbon

Guide

with

Carriage

Assembly

at

center,

left

end,

and

at

right

end.

All three

measurements

should

be

0.20mm

to 0.25mm.

See

Figure

A. If

any

mea-

surement

Is

out

of

tolerance,

loosen

Adjust-

ment

Lever

Nut.

Insert

a

small

rod

Into

hole

at left

end

of

Rear

Carriage

Shaft,

see

Figure

B.

To

adjust

right

end

gap,

rotate

Rear

Carriage

Shaft,

with

rod,

until

proper

gap

measurement

Is

obtained.

To

adjust

center

and

left

end

gap, hold

Rear

Carriage

Shaft In

position

with

rod,

and

rotate

Left

Adjustment

Bushing

until

proper

gap

measurement

is

obtained.

After

adjustment

is

complete,

tighten

Adjustment

Lever

Nut,

while

ensuring

that

Left

Adjustment

Bushing

and

Rear

Carriage

Shaft

do

not

move.

TIMING

BELT

TENSION

Set

Adjustment

lever

to

position

1,

see

Figure

A.

Position

Carriage

Assembly

to

right

end.

Check

Timing

Belt

Tension

for

25+4g

(3/4

to

1

oz)

to

deflect

the

back

length

of

the timing

belt

5/64"

to

the

front,

measured

5

Inches

to

the

right

of

the

center

of

the

Timing

Pulley.

If

measurement

is

not

correct,

loosen

screw

securing

Adjusting

Plate,

see

Figure

C.

Insert

a

common

screwdriver

Into

slot

on

Adjusting

Plate

and

adjust

until

proper

Timing

Belt

tension

Is

obtained.

Tighten

adjusting

Plate

Screw.

ADJUSTMENT

LEVER

FIGURE

A

0.20mm

To

0.25mm

POSITION

1

PLATEN

ADJUSTMENT

N.

BUSHING

ADJUSTMENT

LEVER

NUT

RIBBON

GUIDE

FIGURE

C

ADJUSTING

PLATE

TIMING

BELT

25±4g.

ADJUSTING PLATE

SLOT

j^y

ADJUSTING

PLATE

SCREW

HOME

POSITION

DETECTOR

FIGURE

B

LEFT

ADJUSTMENT

BUSHING

RIBBON

GUIDE

REAR

CARRIAGE

SHAFT

HOLE

REAR

CARRIAGE

SHAFT

Initiate

Printer

Self

Test.

Left margin

should

be

In

line

with

"0"

on

Ball

Roller

Scale

±lmm.

If

left

margin

Is

out of

position,

loosen

Home

Position

Detector

Screw.

Reposition

Home

Position

Detector

so

left

margin

Is

properly

positioned,

see

Figure D.

Tighten

Home

Position

Detector

Screw.

FIGURE

D

1

mm

1

mm

-HI-

CARRIAGE

ASSEMBLY

FRONT

CARRIAGE

SHAFT

o| mo z i

p

jmm i

c

H M H

hi

H

H H

H

M H M

H

PRELIMINARY SERVICE

CHECKS

(Continued)

SWITCHES

AND

JUT

DIP

SWITCH SETTINGS

"Caution": Do

not

change

the

Dip

Switch

setting when

the

prfnter

or

connected

computer

power Is "ON".

DSW1-1

If. "ON"

the

printer

will

stop

printing

when It

runs out

of

paper.

If "OFF"

this

switch disables

the

paper out detector*

DSW1-2 If "ON"

the

SELECT IN signal

of the

parallel

Interface

Is

held low.

If "OFF"

the

SELECT

IN

signal

Is

controlled

by host

computer

(when

High,

printer

cannot

accept

data

)

DSW1-3

If "ON"

the

down

load

character

definitions

are

Ignored

and the

RAM Is

used as

a print buffer.

If "OFF"

the

down

load

character

definitions

are

enabled

and the

buffer Is reduced

to

one

line.

DSW1-4 If "ON"

the

default

line spacing

is set

to 1/6 Inch.

If "OFF"

the default

line

spacing Is set

to 1/8

inch.

DSW1-5 If "ON"

Line

Feed

Is required

from the

host computer.

If

"OFF"

one Line

Feed

is auto-

matically performed

with

every

carriage

return.

DSW1-6 If "ON" bottom

margin

Is

not

set at

Power On.

If

"OFF" bottom

margin

Is

set

to

one Inch.

DSW1-7 If

"ON"

the

default

pitch Is

normal

Pica pitch

(10CPI).

If

"OFF" the

default

pitch

Is condensed

Pica

pitch (17CPI).

DSWJ-8

If "ON"

the

zeros will

be

printed

without

slashes.

If

"OFF"

the

printer

will

print

slashed

zeros.

DIP

SWITCH 2

DSW2-1

If "ON"

the default "character

style

Is

normal draft.

If

"OFF"

the

default

character

style

Is set

to Near

Letter

Quality.

DSW2-2

If

"ON"

the printer

emulates

the

Epson

FX-85

printer

(Standard).

If

"OFF"

the

printer uses

the

"IBM" compatible

mode.

DSW2-3 If

r

ON"

and DSW2-2

Is

"OFF", the

printer

emulates

IBM-P

(Propr Inter

5.

If "OFF"

and DSW2-2 Is

"OFF",

the

printer

emulates

IBM-G

(Graphic printer).

DSW2-4

This

switch

function depends

on

the

setting

of

Switch

DSW2-2.

If DSW2-2

"ON":

DSW2-4

"ON"

sets

MINIMUM

line

feed value to

1/216 inch,

DSW2-4

OFF

sets MINIMUM

line feed

value

to 1/144

Inch.

If

DSW2-2

Is 0FF:DSW2-4

"ON"

selects

Character

Set

#1,

OFF

selects

Character

Set

#2.

DSW2-5

If

"ON" the print

head

will return to

the

left margin

after

the paper

advance.

If

"OFF"

the print

head

will not return to

the

left margin

after

the

paper advance.

DSW2-6

thru

2-8

will

select

the default

International

character

set.

See Chart.

DIP Switch

1

DIP

Switch

2

The

DIP Switches

are located

under

the

Printer Cover

International

Character

Sets

Courtesy of

Manufacturer

SWITCH

USA

FRANCE

[

GERMANY

|

ENGLAM)

DENMARK SWEDEN

ITALY SPAIN

2-6

ON

OFF

ON

OFF

ON

OFF

ON

OFF

2-7

ON

ON

OFF

OFF

OH ON

OFF

OFF

M

ON

ON

ON ON OFF OFF

OFF

OFF

VI

PRELIMINARY

SERVICE CHECKS

(Continued)

SERVICE

CHECKS

MATCH THE

NUMBERS

ON THE

INTERCONNECTING

DIAGRAM AND

PHOTOS

WITH

THE

NUMBERS

ON THE

SERVICE

CHECKS

TO BE

PERFORMED.

©

PRINTER DEAD

(A)

Verify

connection of

chassis slip

connector to

pin on

Control

Panel

Board. Check

Cover

Open Detector

switch (SW8)

for

closed

continuity,

and

Control

Board connector CN3, pin

11 for

ground when SW8

is

closed.

(B)

CAUTION: If

printer

is still

turned

on,

Printhead may be

hot. Turn

off

printer

and

disconnect

printhead

cable from

Control Board.

Secure

printhead cable to

carriage

and

start

printer

self test.

If

carriage travels as

it

should in

self

test,

check

Printhead by

substi-

tution.

(C) Check AC

Fuse on

Fuse

board.

If

open

check Power

Transformer

(

I i

for possib le

short.

(D) If AC

Fuse is

good, check for

120VAC

between pins

of

Transformer Con-

nector on

Fuse Board. If

voltage

Is

missing,

check Fuse

Board by

substi-

tution.

(E)

Check for

30.2VAC

between pins 1

and

2 and

5.2VAC

between pins 3

and

4

of

connector CN1. If

either

voltage Is

missing, check

Power

Transformer

(T1) by

substitution.

(F)

Check for 39V

at

both ends of

Fuses

(F1,F3,F4,F5)

and 4.4VAC at Fuse

(F2)

on

the Control

Board.

(G) Check for

8.9V at the

collector of

Regulator

Transistor (TR1).

(H) If

8.9V is

missing check Diode

Bridge (DB2).

(I) Check for

5V at

the output of I

CI,

if

5V is

missing check I

CI by sub-

stitution.

(J)

Check for

3.6V at the

emitter of

Regulator (TR1).

If

3.6V

is

missing, check transistor TR1

and

Zener Diode

(ZD1 ) by

substitution.

(K) Check for

36.8V at the

emitter of

TR2.

(L)

Check for

pulses at pins

of XTAL1.

If pulses are

missing

check

XTAL1

by

substitution.

©

CARRIAGE ASSEMBLY

DOES NOT OPERATE

(A)

If

carriage

assembly moves,

then

stops

and alarm

buzzer sounds,

check

connectors

CN10

and CN7.

Check

voltage at CN7

Pin 8 for

over

1V

with

paper

loaded and under

.2V

wlth^}

no paper. Check

CN7 Pin 5 for

over

^m

,5V

when the Home

Position

Sensor

*»

(Ml) Is

clear and under

.25V

when

Oj

the sensor is

blocked.

""^i

(B)

Check the

timing belt.

(C)

Check

Carriage

Motor

winding

®

resistances.

Check the

motor by

sub-

^

stitution.

r

35

S3

(D5 Check Control

Board by

substitution.

©

PAPER

FEED MOTOR MALFUNCTIONING

(A)

Check Paper

Feed Gear Assembly.

(B) Check

Paper Feed

Motor.

(C)

Check

Connector CN9.

(D) Check Control

Board by substitution.

©

PRINT HEAD

MALFUNCTIONING

(A)

Check Print

Head for

damage

or

contamination.

(B)

Check the

resistance of Print

Head

solenoids.

WARNING; Shorted

Driver can

damage

Prtnt

Head.

Check

Drivers for short

before

re-

placing the

Print

Head.

@

PRINTER WILL NOT

RECEIVE

DATA

(A)

Check interface

Board

and cable.

CB)

Check

connector CN8 on Main

Board.

(C)

Check Control

Board by substitution.

©

CONTROL PANEL

MALFUNCTIONS

(A)

Check

connectors CN2

and CN3

on

Control

Board.

(B)

Check Control Panel Board

by

substi-

tution.

(C5 Check Control Board by

substitution.

<

5

m

o
z

m

M

PRELIMINARY SERVICE

CHECKS (Continued]

:.

:

?c

APER

FEED

CARRIAGE

COVER

OPEN

MOTOR

**OTOP

PHK.7W

CONTROL

PANEL

LF1

CP;

SW8

BOARD

PAPER

FEED

SEAR

ASSEWLY

0(30

)

PAPER

END 1

SENSOR

K2

20V

AC

FUSE

:->:

TIMING

p;

/TT\

/"~"\

BOARD

PRINT

PELT

HOME

POSITION

v!)

(!!)

md|

HEAD

SENSOR

PRINT HEAD

x_«^

W

00

Q

CABLE

CHASSIS-OVERALL

VIEW

VIII

PRELIMINARY

SERVICE

CHECKS

(Continued)

m

IIII6;

j^^p

o

o

o>

Nl

f^\

s

l

1D

J

O

v_y

s

12GVAC

i-

Z

30
_t

^a

m

>

f~\

33

33

(ic)

(0

vl/

5

,

"**_«*'

z

FUSE

(A

F1

3»

US

FUSE

BOARD

IX

PRELIMINARY

SERVICE

CHECKS

(Continued)

CONTROL

BOARD

X

CONTROL

BOARD

ill

PRELIMINARY

SERVICE

CHECKS

(Continued)

POWER

SW1

1

20VAC

190mA AC

ADJUSTING

PLATE

SLOT

INTERCONNECTING

DIAGRAM

iNTERCONNECTING

DIAGRAM

XI

PRELIMINARY

SERVICE

CHECKS

(Continued)

PREVENTATIVE

MAINTENANCE

ENVIRONMENT

Computers

perform

best in

a clean, cool area

that is

below

80 degrees

Fahrenheit

and free

of

dust and

smoke particles.

Even

though home

Computers

are not

affected

by cigarette smoke

as much

as commercial

Computers are

affected, it

is better

to mantain

a

smoke-free area

around

the Computer.

Do not

block cabinet vents

of Computer,

Monitor,

Printer, or

other

power

devices.

ELECTRICAL

POWER

Variations

in the line

voltage

can

affect the

Computer. Try

to avoid

these

fluctuations

by using

an

AC

receptacle

that is on

a power

line not

used by

appliances or

other

heavy current

demand

devices.

A

power-surge

protector,

power-line

conditioner,

or

non-interruptable

power supply

may

be needed

to cure the

problem.

Do not

switch

power On

and Off

frequently.

KEYBOARD

Liquids

spilled

into the

Keyboard

can ruin it.

Immediately

after

a spill occurs,

disconnect

the

Computer

power

plug from AC

power

outlet. Then, if

circuitry or

contacts are contaminated,

disassemble

the

Keyboard

and carefully

rinse the

Keyboard

printed

circuit board with

distilled

water and

let it dry.

Use a cotton swab

to clean

between the

keys.

Use a non-abrasive

contact

cleaner

and lint-free

wipers

on

accessible

connectors and

contacts.

DISK

DRIVES

Clean the

read/write

heads of the

Disk Drives

about

once a month or

after 100 hours

usage.

Use only

an approved

head

cleaning kit.

Handle

carefully

to preserve

proper disk

head alignment.

A sudden bump

or jolt

to

the Disk

Drives

can knock

the disk

head

out

of

alignment. If

Disk Drive must

be transported,

place an

old disk

in slot

and close

door during

transport.

Store

disks in their

protective

covers

and never touch the disk

surface. Observe

the disk

handling

precautions

usually found

on the back

of disk protective covers.

PRINTERS

Carefully

vacuum

the Printer

regularly.

Wipe surface

areas clean using

a

light

all-purpose

cleaner.

Do not

oil the

machine. The

oil will collect

abrasive grit and

dust.

The

dust will

act as

a

blanket. This

can

cause

components

to overheat and fail.

STATIC

ELECTRICITY

Static

electricity

discharge

can affect the

Computer. In order

to

minimize the possibility,

use

anti-static

mats,

sprays, tools

and

materials, and maintain

good humidity in the Computer en-

vironment.

MONITOR

Use

an

isolation

transformer

with

any Monitor

that

does

not

come as

part

of

the system since

some

Monitors

use a HOT

chassis

(chassis

connected

to

one

side

of

the

AC line). The

face of

the

Monitor

should

never

be left

on

for

long

period of time

at high brightness level except when

pattern

is

being

changed

periodically.

Use caution when

cleaning anti-glare screens, to

preserve

the

glare-reduction

feature.

Xli

SAM

S

COMPUTERFACTS

STAR

MODEL

NR-10(VERSIONS

1,2,3)

Star Micronlcs

Printers

are

warranted for one

year from

date of purchase. If

any

service

or modifications

are

performed during this

time

by other

than

Authorized

Star Micronics

Service

Centers,

the

manufacturers'

warranty

will

be void.

CO

n

ei

</)

z

o

55

cc

cc

'*

o

I

cc

z

-J

HI

Q

O

s

Q.

O

SAFETY PRECAUTIONS

See Page 1

3.

PRELIMINARY

SERVICE

CHECKS

ENCLOSED

INDEX

Page

Block Diagram

21

Disassembly

Instructions , 14

Exploded

Views

35,37,40,41,42

General

Operating

Instructions....

14

GridTrace

Location

Guide

Control Board....

44

Terminal

Guides

34

Line

Definitions.....

, 43

Logic

Charts

18,

19

Miscellaneous

Adjustments

15

Parallel

Interface

33

Parts

List

25 thru 32

Mechanical

36,38,39,40,41,42

Page

Photos

Chassis-Overall

View

23

Control Panel

Board

24

Control

Board...

1

1,12,45,46

Fuse

Board. . .

.'

22

Parallel

Buffer

Board

22

Pr

i nter

Se I f-Test

30

Safety

Precautions

13

Schematics

2 thru

10, 47

thru 57

Schematics

Notes

43

Serial

Interface

33

Switches

and

Jumpers

20,39

Test Equipment

16

Troubleshooting

16,17

o

^1

o

a
m

S.

w

30

33

Crt

O

Z

SAMS

Howard

W.

Sams

& Co.

4300

West

62nd

Street,

P.O.

Box

7092,

Indianapolis,

Indiana

46206 U.S.A.

The listing of

any available

replacement

part herein

does not

constitute in

any case

a recommendation,

warranty or

guaranty

by Howard

W. Sams

& Co.

as to

the

quality

and suitability

of

such

replacement

part. The numbers

of these

parts have

been

compiled

from

information

furnished

to Howard W.

Sams

& Co.

by

the

manufacturers

of the

particular

type of replacement

part

"sted

9QCP1

91

04 DATE 2-90

Reproduction

or

use, without

express

permission,

of editorial

or pic-

torial

content,

in any

manner, is

prohibited.

No

patent liability

is

assumed with

respect

to the

use of the

information

contained

herein.

©

1990 Howard W. Sams

& Co.

4300 West 62nd

Street,

P.O.

Box

7092, Indianapolis,

Indiana

46206

U.S.A.

Printed in

U.S.

of

America

A PHOTOFACT

STANDARD NOTATION SCHEMATIC

with

ansnmHi

O

©

Howard W

Sams &Co.

1990

STAR

MODEL NR-10(VERSIONS

1,2,3)

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1990

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1990

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W. Sams &

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