Teletype Basic KSR, Basic Ro Repair Manual

e

the

113

teleprinter

T.M

.

TELETYPE

,

InrI:'

REPAIR MANUAL

for

BASIC

TERMINALS

without

an

Internal

Data

Set

©

1978

by

Teletype Corporation

Printed

in

U.S.A.

The

43

TELEPRINTER

REPAIR MANUAL

REP

AIR

MANUAL

391

Comments concerning be

welcomed. This

Corporation. This

sheet

this manual.

content,

may

be removed

may

usability,

also be used

and

adequacy

and

mailed directly

for

ordering additional copies

of

this manual will

to

Teletype

of

Comments

to:

Order manuals from:

Mail To: Teletype Corporation

5555

Touhy Skokie, Dept.

3212

IL

Avenue

60076

Dept. 2181-3

The

43

TELEPRINTER

REPAIR

Issue

MANUAL

1,

April

391

1978

This

manual

Terminals The

manual

that

parts 43

Basic interface information

provides

without

is

include repair, servicing

KSR

or a TTL

for

All replaceable sembly, included

adjustments on

wiring diagrams isolation using or

shop

facilities are required teleprinter perform installed

The

43

tion

extracted

and

schematic diagrams

sheets

terminals

or

simulate on-line

on

location.

Teleprinter Circuit Diagram, Manual

for

the

components.

complete

an

internal

intended

and

RO

for

Sprocket

interface. Manual

all versions components

and

an

oscilliscope

or

components

from

this

manual. for

convenience

REPAIR

MANUAL

INTRODUCTION

repair

data

field

or

and

or

Friction

information

set

(modem)

shop

how

369

of

the

Basic

43

Teleprinter.

are identified in

troubleshooting

and

charts

or

volt-ohmmeter.

for

and

interface

The

are provided

repair operations, however

or

local strapping

testing when

component

each circuit are

of

field

or

shop

for

43

and

major

use

and

is arranged

to

operate

Feed

provides

the

instructions

Teleprinters,

complete

manual along

information.

for

No specially designed

may

the

385,

provides

layouts, lead designations

combined

personnel

into

when

Basic

Teleprinter

components.

into

various for

with

an

servicing

with

Waveforms are

additional

trouble

standard

be

required

teleprinter

circuit

single

informa-

fold-out

repairing

the

EIA

disas-

tools

43

to

is

not

major

The

task

flow

chart

servicing activities

Spare

units

and

parts

on

the

for Service personnel should before

attempting

Corporation on

43

Teleprinters.

service

Technical Training Center,

the

associated

manual

repair are available

be

properly

or

repair

trained

of

the

312-982-3940,

parts.

from

and

have access

43

Teleprinter.

the

intended

Teletype

Contact

for

courses available

repair

Corporation.

to

these spares

Teletype

or

The

43

TELEPRINTER

REP

AIR

MANUAL

PART PART 9

PART PART PART PART PART PART PART

TABLE

1 2 3 4 5 6 7

TESTING TROUBLESHOOTING DISASSEMBL CIRCUIT DESCRIPTION AND DIAGRAMS ADJUSTMENTS PARTS PACKING

OF

CONTENTS

Y AND REASSEMBLY

AND SPRING TENSIONS

AND UNIT CODES

AND MARKING

SUPPLEMENTAL MANUALS INCLUDED

8

KSR INSTALLATION AND

ROUTINE

SERVICING MANUAL

RO INSTALLATION AND ROUTINE SERVICING MANUAL

368

373

Issue 3

Issue 2 PART PART

10 11

KSR HOW RO HOW

TO

OPERATE

MANUAL

367

372

Issue 2

REPAIR

MANUAL

391

TASK

FLOW

CHART

+

DISASSEMBL Y REASSEMBLY

" !

AND

PART 3

INTRODUCTION

"

TESTING

+

I

"

TROUBLESHOOTING (Isolation and Correction)

+

" !

CIRCUIT

DESCRIPTIONS

AND

DIAGRAMS

PART 4

ADJUSTMENTS

AND SPRING

TENSIONS

l

" :

PART 5

~

I

" I

PARTS AND

UNIT CODES

PART

6

PART

1

2

......

~

PACKING

MARKING

r

ST ATION INSTALLATION

AND

VARIABLE

ROUTINE MAINTENANCE

AND LUBRICATION

,r

STATION

AND

FEATURES

"

.4

~

OPERATION

KSR Installation and Servicing Manual

RO Installation and Servicing Manual

KSR

How

Manual RO

{

How

Manual

368

373

367

to

372

to

Operate

PART

PART 8

PART

7

9

10

11

PART 1-TESTING

MANUAL

391,1-1

GENERAL

1.

TEST

2. KSR

3. OFF-LINE V ARIABLE

CHECKOUT A.

B.

4.

RO

OFF-LINE V ARIABLE

CHECKOUT A.

B. Variable

1.

GENERAL

1.01 RO

Teleprinter.

1.02 nents

are operate ating

conditions.

1.03

not

provided in

is

found

and

is

used

this

in

CONTENTS PAGE

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

EQUIPMENT

TESTING

TESTS

FEATURES

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

Loopback Variable Features

TESTING

TESTS

FEATURES

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

Loopback

This

part

provides testing

and

procedures

The

information

determine

if

operating

for

extended

Endurance, electrical

parameter

this

to

some

extent

to

isolate

part.

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

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

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

Mode

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

Checkout

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

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

Mode

Features

properly

for

in

th~

terminal

periods

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

Checkout

the

this

and

under

environmental

testing

part.

This

type

in

Part

2,

and

correct

...

requirements

43

Basic

KSR

part

is

intended

and

its

compo-

will

continue

normal

oper-

extreme

information

of

information

Troubleshooting

troubles

indicated

12 12

12 15 15

20 20

20

and

to to

or

is

(b) A questionable

teleprinter

1 2

repair. (c) A questionable teleprinter, in service

received

3 3

properly

1.05

or

requires repair.

Following installation ance calls

this

part

or

an

HTO

manual should

the

teleprinter

1.06

On

is operational.

trouble

verification

test

station isolate After

confined

1.07

(if available) should

the

trouble

correction

to

the

specific

The

checkout

table

form in a specific sequence. A response is given verify

the

test

condition

1.08

factory

1.09

step performed factory,

1.10

Always given.

results

If

the

in

any

to

make sure

properly.

refer

to

Teleprinters minal

perform The of

indicated

step

Data locally developed and

procedures

If

test

station

procedure

Note:

late

The

most

to

is

should

local

on-line

component

operates

from a customer,

at a location,

installation

be

performed

calls, a local test

under

within

or

of a trouble,

area

that

routines

with

test

has

passed.

the

test

steps are based

installed

properly

or

routine

either

checkout

to

test

the

direction

be

performed

to

the

was failing.

are

presented

conditions

tests in

or

requires

is

operating

mainten-

the

testing

using

make

or a trouble

teleprinter.

test

may

arranged

the

on

all previous steps.

response is

of a test

that

the

If

the

procedure,

procedure

results

not

repeat

are

still unsatis-

obtained

has

Page 2-1, Troubleshooting.

with

TAUs

Unit

must external perform

remote, a copy

be

available

tests

specified

tests

for

or

be

testing

actual

at

the

in

these

with

no

associated

arrangements

On-Line Tests.

of

the

test

station.

this

part

teleprinters.

in

the

or

in

the

sure

of

a

to be

in

to

order

satis-

the

been

Ter-

with

testing

simu-

1.04

The

testing

should

normally

(a) A repaired

before

being

information

be

used

teleprinter

returned

is

placed in service.

provided herein

to

determine

operating

properly

to a customer

if:

or

--1.11

Before

the

remote

an

on-line

testing vided with advance details under terminal option

test,

such as,

(KSR

exceptions

telephone

or

RO) (friction

present,

test

station

about

speed,

can

be

must

the

number,

or

etc.

performed,

be

pro-

teleprinter

type

of

sprocket)

391,

1-2

1.12

Before proceeding procedure,

(a) Is

grounded

teleprinter

check

and (b) Are all cable (c) Are

printer

with

the

following:

connected

polarized ac

connectors

paper

and

the

to

outlet?

fully seated?

ribbon

installed? (d) Are Page

to

2-1.

Manuals

any

option

(Part 8 or

exceptions

368

(KSR)

9)

present?

and

Procedures in Off-Line Tests are based factory exceptions as

furnished

shown

options

are present,

in

the

KSR

being present.

the

test

response will

or

RO

Variable

Checkout.

1.13 index

head

All references

second delay,

two

character

indicates

the

to

spaces

allow

the

to

the

character

are right.

position

printed.

2.

TEST

EQUIPMENT

and

2.01 Off-Line cedures are provided

Tests where

are

not

connector

external

available.

terminals, as follows, should

Variable

communication

To

perform

Feature

to

simulate On-Line

these

checkout

a properly

properly

373

(RO),

on

standard

If

option

Features

after

a one-

print

head

The

Test pro-

test

devices

tests,

be

strapped

Refer

be

to

print

to

be

the

before

proceeding terminals should specified

Note:

during

Contact Department, a

43

Teleprinter

vides

:S

5

6

25)

7)

4)

2.02

Teleprinters

checks off-line devices are

2.03

both

EIA INTERFACE

SEND DATA

RECEIVE DATA

CLEAR TO SEND

DATA SET READY

DATA TERM READY

ANALOG LOOP

GND

REQUEST TO SEND

A

43

KSR

CAA

or

to

not

A

volt-ohmmeter

arrangements

perform when available

measure ±12 volts

continuity

checks is required.

with

the

tests.

be

connected

the

test

steps.

Teletype

312-982-2000,

Interface

~~

.:

V

11)

1~

~

1)

3)

6)

Test

TTL

INTERFACE

RECEIVE

SEND DATA

TERMINAL READY

DATA READY

DIGITAL LOOP

ANALOG LOOP

REQUEST TO SEND

Operator

CAB

can

be

tests

external

for

on-line

or

equivalent means

and

+5 volts

The

remaining

or

measured as

Corporation

for

availability

Box, which pro-

shown

as follows:

DAT,&

f

+5V

·12V +12V GND

Console,

substituted

and

variable

communication

Use meter. (Indicators vided Test box.)

43K101/

in

feature

operation.

and

perform

Sales

of

volt

pro-

on

RO

test

to

3.

KSR TESTING

OFF-LINE TESTS

TABLE A

OFF-LINE TEST PROCEDURES

MANUAL

391,1-3

TEST

Power On/Off

Printer

Option

431.a.

432.a.

STEP

1.

2.

3.

PROCEDURE

ON

t

OFF

(Rear

~PRINT

HEAD

MARKER

I 10

"PRINT

Hold

PRINTER

approximately eight lines are printed.

INDICATOR

TEST

key

SCALE

depressed

View)

until

~

RESPONSE

Print

head returns

left-hand margin. Paper feeds TERM

ANSW)

Print first

mark

scale.

ALARM (LOCAL-TALK) Characters

Fig.

1.

431

and

any

exceptions.)

Bell rings line. (Right-Hand Margin and

Test Message.)

to

READY (AUTO

turns

head

marker

on

and

printed

(Refer

432b

at

end

to

on.

points

indicator

LOCAL

turn

as

to

Options

and c for

of

each

the

on.

in

to

Note

1:

First line

~nopqrstuvwxyZ{:

• ".tX&/().+,-.IOt23456789:;<=>!@ABCDEF6HIJKLMNOPDRSTUVUXYZ(\]h_'abcdefghiJklMnopqrstuvwxyz{

• ".tX&'()*+,-.IOt23456789:;<=>?@ABCDEFGHIJKlHNOPURSTUVUXYZ[\)'_'abcdefghiJklMnopqrstuvwxyz{

• ".tX&'()*+,-.IOt23456789:;<=>!@ABCDEF6HIJKLHNOPDRSTUVUXYZ[\]'_'abcdefghijklMnopqrstuvwxyz{ }P

• "'$X&'().+,-.I0123456789:;<=>?@ABCDEF6HIJKLHNOPDRSTUVUXYZ(\]h_'abcdefghijklMnopqrstuvwxyz{

• ".tX&'().+,-.IOt23456789:;<=>?@ABCDEF6HIJKLHNOPGRSTUVUXYZ[\]h_'abcdefghijklMnopqrstuywxyz{

• "'$X&'()*+,-.IOt23456789:;<=>?@ABCDEF6HIJKLMNOPGRSTUVUXYZ[\]h_'abcdefghijklMnopqrstuvwxyz{

• "ItX&'().+,-.IOt23456789:;<=>?@ABCDEF6HIJKlMNOPGRSTUVUXYZ[\]A_'abcdefghijklMnopqrstuvwxyz{

• "'$%&'().+,-.IOt23456789:;<=>?@ABCDEF6HIJKLMNOPDRSTUVUXYZ[\]h_'abcdefghijklMnopqrstuvwxyz{

Note

See

/ does

"tllVW>:YZ{:}"

•

'"I.X&'().+,-./01234567891;<=>?@ABCDEFGHIJKlHNOPQRSTUVUXYZC\J~_'abcdefghiJkl"~

pqrstuyw)(yz{I}"

•

~"I.X"().+,-.I0123456789:;<=>"ABCDEFGHIJKlHNOPQRSTUVUXYZC\]h_'abcdefghiJkl"n

pqrstuywxyz{!}"

•

!"N.X&'()*+,-./0123456789:;<=)?IABCDEFGHIJKlHNOPQRSTUVUXYZC\JA_'abcdefghijkl"n

pqrstllYW)(Yz{:}"

•

!"N.%&~()*+,-./Ot23456789:;<=)?@ABCDEFGHIJKlHNOpaRSTUVUXYZ(\JA_'~bcdefghijkl"n

pqrstllYWXYz{:}-"'

1.

may

}

....

start

with

any

character

Sprocket Feed -

Friction Feed

for

13

-10 Fig. 1

sprocket

Characters

or

friction feed printers.

per

inch

Note

2:

The lower case

not

print

per

inch

on

80

character line.

}N

}H

}H }H }N

}N }N

"0"

\

391,

1-4

KSR OFF-LINE TEST (Cont)

TABLE A (Cont)

OFF-LINE TEST PROCEDURES

TEST

Printer (Cont)

Operator Console

STEP

4.

5.

6.

PROCEDURE

Release

Hold CTRL

PRINTER

key

depressed

TEST key.

key.

Place CAPS LOCK Starting with to

right, depress unshaded keys

key

in

top

row and moving from

and

depress RETURN

DOWN position.

left

in

Fig. 2.

RESPONSE

ALARM

turns

off.

Character printing stops. Print head is

left-hand margin

to

feeds Characters

returned

and

line.

as

to

paper

in

Fig. 3.

TEST STEP

Operator Console (Cont)

7.

8.

9.

Fig. 2

1234567890-+'OWERTYUIOP=\ASDFGHJKL;~{ZXCVBNM,.1

Fig. 3

'1

23456?890-+

···qwer'tyuiop:=\asdf'3hjkl;··

{z;.:cvbnf"l,

.1

Fig. 4

TABLE A (Cont)

OFF-LINE TEST PROCEDURES

RESPONSE

head

is

Depress RETURN

PROCEDURE

and

then

LINE

FEED

key.

Print left-hand margin feeds

to

Depress RETURN and

and

release CAPS LOCK

UP position. Starting with

to

right, depress each unshaded

then

top

LINE

key

row

key

FEED

so

it

returns

and

moving

in Fig. 2.

key.

Characters

printed

Fig. 4.

Print head returns

hand

margin

to

returned

and

line.

as

to

and

paper

to

paper

in

left-

feeds

TABLE A (Cont)

OFF-LINE TEST PROCEDURES

lV1ANUAL

391,

1-5

TEST STEP

Operator Console (Cont)

10.

PROCEDURE

Hold left SHIFT key depressed and starting with

top

row and moving from left

each unshaded

depressed

key in Fig. 5. Hold right SHIFT key

and

depress

!

@#$:.~

rn

;"

(~:t:

Fig. 5

( )

... ] ....

Fig. 6

to

right, depress

key.

1:·

[ : :

II

}<>

'?'f

RESPONSE

Characters printed

Fig.

6.

as

in

TEST STEP

Operator Console (Cont)

II.

12.

13.

14.

15.

TABLE A (Cont)

OFF-LINE TEST PROCEDURES

PROCEDURE

Depress RETURN and then LINE FEED key.

Hold

CTRL

key.

Hold

CTRL

key.

Hold

CTRL

key. H

Depress SPACE BAR.

key

depressed

and

depress

~

S~B

~

"ilL

rn

~

RESPONSE

head returns

Print hand margin and paper feeds

to

Signal bell rings.

Print head moves character position left.

Print head moves character position right.

line.

to

one

to

one

to

left-

the

391,1-6

KSR OFF-LINE TESTS (Cont)

TABLE A (Cont)

TEST

Operator Console (Cont)

Cover Inter-

lock

Right

Margin

and

Signal Bell

STEP

16.

17.

18.

19.

20.

21.

OFF-LINE TEST

PROCEDURE

Depress BACK SPACE key.

Depress LINE FEED key.

Depress

Depress TERM READY

Raise cover.

Close cover.

Depress RETURN and

Space (See Space

and

print

1.13) print

hold

head head

REPT and

(AUTO ANSW) key.

the

to

column

to

column

PROCEDURES

rn

LINE

125 73

keys.

FEED

(sprocket feed).

(friction feed).

key.

RESPONSE

head

is

printed

is

reached.

turns

to

Print character position left.

Paper feeds The k of

line

, Signal bell rings

line. TERM READY

ANSW) goes off. LOCAL (LOCAL-TALK) ALARM

ALARM goes off.

Print head returns hand margin feeds

to

and

line.

one

to

end

(AUTO

and

on.

to

paper

line.

the

end

of

left-

Margin

Set

and

Clear

(Remem-

ber

Lower Case)

22.

23.

24.

25.

Depress

Depress SPACE BAR nine times.

Depress (ESCL lower case.)

~

""Ii'

~

key.

SPACE BAR six times.

SPACE BAR

ESC

and

ESC and

then

two

times.

~

c~

~

rn

L

key. (ESCx)

key.

Signal bell operates as

is

character b printed.

Signal bell does

Print head moves six

ate. character positions right.

Signal bell operates times.

Print head returns

left-hand margin and indi-

cates beginning Print head moves

Column 10.

being

not

of

to

oper-

to

two

to line.

the

TABLE A (Cont)

OFF-LINE

TEST

PROCEDURES

MANUAL

391,

1-7

TEST

Margin Set

and Clear (Cont)

STEP

26.

27.

28.

29.

30.

3l.

PROCEDURE

Space

print

head

to

Column

Depress ESC and

Depress Depress BACK SPACE key. Space

Depress SPACE BAR.

Depress

Depress ESC

Depress SPACE

Depress ESC

RETURN

print

SPACE BAR.

head

and

then

~

D~2

key.

to

Column 50.

then

m key (ESC

BAR

four

then

~

EJ:

5l.

~

key. (ESCr)

times.

~

key

m

(ESCw).

)·

RESPONSE

Print

head

returns

margin

Signal bell rings. Signal bell operates.

Print 5l.

Signal bell rings. Print Column

Print Column

Print hand and

(Column

head

head margin

paper

indicates

remains

5l.

moves

55.

returns

(Column

feeds

10).

to

left

Column

at

left-

10)

Turn

off

before

If

connector

Loopback

proceeding

the

43

TEST

POWER switch

to

Teleprinter Interface

(TTL

or

STEP

32.

~---

32.a.

and

Step

32.

EIA). See instructions furnished

Place

teleprinter

or

32

b.

1------------------

EIA

INTERFACE -Connect

Term

Ready.

Turn

on

connect

Test

Teleprinter

the

Box

OFF-LINE

test

arrangement

is available,

TABLE A (Cont)

TEST

PROCEDURE

in

loopback

POWER switch.

shown

connect

with

mode:

Carrier

the

test

box.

PROCEDURES

Perform 32 a

Detect

test

on

to

box

Data

Page 1-2

to

the

teleprinter

1----------

Print

left-hand margin.

feeds turns EIA

INTERFACE

CONNECTOR

+

12

V will pin 4 (Issue GND will be pin

7.

the

interface

RESPONSE

head is

to on.

2A

returned

line.

present

connector

interface

to

Paper

DATA

present

Logic Card)

on

391,

1-8

KSR OFF-LINE TESTS (Cont)

TABLE A (Cont)

OFF-LINE TEST PROCEDURES

TEST

Loopback (Cont)

----

Option

434.a.

STEP

32.b.

33.

TTL

INTERFACE -

Data

Ready. Measure interface

Tum

Depress

(PARITY ON).

Place DUPLEX DUPLEX).

Place CAPS LOCK

continuity

connector.

on

Teleprinter POWER switch.

and

release PARITY

key

PROCEDURE

Connect

between

in

UP

key

in DOWN position.

Terminal Ready

pins 6

key

position (HALF-

and 9 on

to

UP position

to

TTL

RESPONSE

Print

head

is

returned

left-hand margin. Paper

feeds

to

0

should read (Issue

2A

DA T A

INTERFACE

+5 V pin

-12 pin + pin GND will

9.

AANNAALLOOGG is printed.

434b

turns

dc

7. V

dc

II.

12 V dc

13.

for

ohms

Logic Card).

on.

CONNECTOR

will be

will

(Refer

present

be

will

be

present

to

any

exceptions).

present present

on

Option

to

on

----

Option

433.a.

----

34.

35.

36.

37.

Type

the

following:

ANALOG

Depress SPACE BAR. Place DUPLEX key.in DOWN position

DUPLEX). Type

the

following:

TEST Watch TERM READY (AUTO ANSW)

hold

CTRL

Depress

Hold key.

INTRPT

CTRL

key

depressed

key.

depressed

and

depress

and

depress RETURN

(FULL

key,

then

~

E~T

~

key.

TEST is

DATA

(AUTO ANSW) indicators flash as depressed.

433b

INTRPT momentarily.

Signal bell rings. Print

printed.

and

TERM READY

EOT key

(Refer

for

any exceptions.)

turns

on

head

does

not

is

to

Option

return.

MANUAL

391,

1-9

TEST

Loopback (Cont)

Option

435.a.

Option

435.a.

STEP

38.

39.

OFF-LINE TEST PROCEDURES

PROCEDURE

Depress RETURN and

REPT

and

Depress

down

time

CPS

until

key

Hold

(Check

Place Depress REPT

down

Hold (Check time

until

to

K keys.

two

to

print

line.)

in

DOWN position. (10 CPS.)

and

K keys.

two

print

line.)

TABLE A

then

LINE FEED key.

lines

of

lines

of

(Cont)

Ks

are printed.

Ks

are printed.

RESPONSE

Continuous printed

Ks

will

across entire

be

new

line.

at

end

of

line

Bell rings automatic feed will

printed

occur

be

line plus

in approximately:

return

performed. One

return

and

and line

will

4 seconds (sprocket feed)

2.5 seconds (friction feed) to

(Refer

for

Option

any exceptions.)

Continuous printed

Bell rings

and

across

at

automatic line feed will One

printed

will occur 14

seconds (sprocket feed)

8.5

seconds (friction feed)

in

435b

Ks

will

be

entire

line.

end

of

line

return

be

line plus

and

performed.

return

approximately:

Low

Paper

(Friction

Feed) Paper-Out (Sprocket

Feed)

40.

41.

the

Remove

paper Lift paper roll from feed).

Watch DATA key key eight times.

- paper-out (sprocket feed). paper

support

and

depress LINE

- (friction

FEED

part

of

First

second

(approximately

rate

to

be

of

speed.

Option

acters) will faster (Refer any

exceptions.)

line

18

char-

printed

435b

at

for

Signal Bell rings (sprocket feed only).

turns

Alarm

on.

S:Qrocket Feed DATA

(LOCAL-TALK)

as

8th

turns

LINE

off. LOCAL

turns

on

FEED

is

received.

Friction Feed

on.

DATA remains (LOCAL-TALK)

LOCAL

remains

off.

a

391,1-10

KSR

OFF-LINE

TESTS

(Cont)

TEST

Low Paper (Friction Feed) Paper-Out (Sprocket Feed) (Cont)

Loopback Clear

Analog Loop

STEP

42.

43.

44.

45.a.

----

45.b.

46.

TABLE A

OFF-LINE

PROCEDURE

Depress

Replace

Depress

EIA Data

TERM

the

DATA

INTERFACE -Disconnect

Term

READY (AUTO ANSW)

paper.

key.

Ready

and Carrier

TEST

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

TTL

INTERFACE -Disconnect

Data

Ready

I

Depress ESC

Hold

SHIFT

and

Terminal Ready.

-

key.

key

depressed

and

(Cont)

PROCEDURES

key.

strap

between

Detect.

strap

between

depress IT]

key.

RESPONSE

SQrocket DATA LOCAL (LOCAL-TALK)

remains

Friction DA

LOCAL (LOCAL-TALK) turns

Alarm

DATA LOCAL (LOCAL-TALK)

turns

TERM ANSW) DATA

ALARM flashes EIA CONNECTOR DATA READY

turns

+12 interface Loop). TTL

CONNECTOR

o V will

interface Loop).

Feed

remains

on.

Feed

T A

turns

off.

on.

turns

off.

turns

on.

off.

READY

turns

on.

turns

off.

INTERFACE

turns

on.

(AUTO

off.

V will

be

present

25

INTERFACE

be

present

3 (Analog

off.

(AUTO

TERM

ANSW)

(Analog

on

TTL

47.

Depress ESC

key

and

then

m

key.

ALARM EIA

CONNECTOR

DATA TERM

(AUTO

-12 V will interface

Loop).

TTL +5 V interface

Loop).

turns

INTERFACE

turns

off.

READY

ANSW)

be

25

INTERFACE

dc

will be

3 (Analog

off.

turns

present

(Analog

present

on.

on

MANUAL

391,

1-11

TEST

Digital 48. Loop

Low Paper

(Friction Feed)

Paper-Out

(Sprocket Feed)

STEP

49.

50.

51.

TABLE A

OFF-LINE

PROCEDURE

TTL

INTERFACE

Hold

SHIFT

TTL

INTERFACE

then

m key.

Sprocket Friction

support.

Depress TERM READY (AUTO ANSW) key.

key

Feed

- Remove paper.

Feed -Lift

~

depressed

TEST

- Depress ESC key.

- Depress ESC key

paper

(Cont)

PROCEDURES

and

depress

roll from

paper

rn

roll

key

RESPONSE

o V will

interface pin 1 (Digital Loop).

+5 V TTL (Digital

Signal bell rings

feed only).

TERM ANSW) LOCAL (LOCAL-TALK) and

TERM

ANSW) LOCAL (LOCAL-TALK)

and

be

present

dc

will

interface

Loop).

READY

turns

ALARM

READY

remains off.

ALARM

be

present

pin 1

(sprocket (AUTO

off.

turn

(AUTO

remain

on

on.

TTL

on.

on

52.

53.

This

completes

ON-LINE testing.

the

Replace

Place CPS Place DUPLEX

DUPLEX).

OFF-LINE

the

test

paper.

key

in

of

UP

key

the

position

in

UP

position

43

KSR

(30

CPS)

(HALF-

Teleprinter. Use local

ALARM

procedures

turns

off.

and

arrangements

for

391,1-12

KSR VARIABLE FEATURES CHECKOUT

the

factory are checked in

Table A.

the

Off-Line Tests in

3.01 exceptions only.

A.

EIA shown Connect Turn

TTL shown Connect Tum

The

procedures in Tables

proper

Loopback

INTERF

on

INTERF

on

ACE - Connect

Page 1-2

Carrier

Teleprinter POWER switch.

ACE - Connect

Page 1-2 Terminal Ready Teleprinter POWER switch.

operation

The

features as furnished from

Mode

PROCEDURE

to

the

Detect

to

the

Band

of

variable features

LOOPBACK MODE PROCEDURES

the

test

interface connector.

Data

Term Ready.

the

test

interface connector.

to

Data

Ready.

C verify

arrangement

3.02

printer

TABLE B

Print head returns Printer performs one line feed. DATA

Off-line and 435b will require placing

into

turns

checkout

the

loopback

on.

of

Options

mode

RESPONSE

to

left-hand margin.

(see Table B).

433b,

the

434b,

tele-

B.

Variable Features Checkout

V ARIABLE FEATURES CHECKOUT PROCEDURES

CHECK

Option

431.b. and c.

(Option

•

!",.%&,()*+,-./J'234567B9:;<=>T@ABCDEFGHIJKLHN~PGRSTUVUXYZ[\J!!'abCdefghijkl~nOpqrstuvwXYZ{:}N

(Option

•

!"It%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLHNIPQRSTUVUXYZ[\J

Depress

431.b.)

431.c.)

and

+ f H

PROCEDURE

hold

PRINTER

TABLE C

TEST key.

Fig.

6-Printer

Test

RESPONSE

Characters printed as in Fig. 6.

at

end

Bell sounds

Message

••

'abcdefghijkl~nopqrstuvwxY2{:}N

of

each line.

MANUAL

391,

1-13

CHECK

Option

432.b. andc.

*(Option

•

Depress

!"'.ZI~C)*+,-.I0123456789:;<=>!'ABCDEFGHIJKLHNOPQRSTUVUXYZ[\]A_

and

432.b.)

hijkl"nopqrstuvwxyz{I}N

•

!"'.ZI'C)*+,-.I0123456789:;<=>!@ABCDEFGHIJKLHNOPQRSTUVUXYZ[\]~_'abedef

hijkl"nopqrstuvwxyz{l}"

*(Option

•

!"'.ZI'C)*+,-.I0123456789:;<=>!@ABCDEFGHIJKLHNOPORSTUVUXYZ[\]A_'abcdefghijklMn

432.c.)

pqrstuvwxyz{I}N

•

!"'.Z&'C)*+,-.I0123456789:;<=>!@ABCDEFGHIJKLHNOPORSTUVUXYZ[\]h_'abcdefghijklMn

pqrstuvwxyz{l}"

VARIABLE

PROCEDURE

hold

PRINTER

TABLE C

FEATURES

TEST

key.

(Cont)

CHECKOUT PROCEDURES

RESPONSE

Line length will 432

b -

72

432

c -

80

Characters

Bell sounds

Note:

not

The

print

be:

characters

printed

at

end

lower

on

72

Note:

not

print

as in Fig. 7.

of

each line.

case

"g"

character

'abedef

The

lower

on

80

does

lines.

/

case

character

"0"

does

lines.

'

*Sprocket

CHECK PROCEDURE

Option

433.b.

Feed

(13

characters

VARIABLE FEATURES CHECKOUT PROCEDURES

Place

teleprinter Depress DUPLEX position

Depress ABC Hold CTRL

depress

(FULL

the

ij

EgT

DUPLEX).

following keys:

key

~

key.

per

inch), Friction Feed (10 characters

in

loopback

key

to

depressed

Fig.

mode.

DOWN

and

7-Printer

TABLE

Test

Message

C (Cont)

per

inch)

will

Printer DATA remains TFiRM off

(does

depressed.

print

READY (AUTO ANSW) remains

not

flash) as

RESPONSE

ABC.

on

(does

not

EOT

flash).

key

is

391,1-14

CHECK

Option

434.b.

Option

435.b.

VARIABLE

Place

teleprinter Depress position

Depress position Place CAPS LOCK posiiton.

PARITY

Place Place (FULL

Depress Hold

DUPLEX

(FULL

and

(PARITY

Depress TEST

teleprinter DUPLEX

DUPLEX).

REPT

down

in

DUPLEX).

release

in

key in DOWN

and

until

end

FEATURES

PROCEDURE

loopback

key

to

PARITY

ON).

key

the

following keys:

loopback

K keys.

of

mode.

DOWN

key

in

DOWN

mode.

line is reached.

TABLE C

to

UP

position

(Cont)

CHECKOUT

PROCEDURES

Printer

••

Characters of Automatic

not

Bell will keys

will

print:

Rrr.

TE.T

will be

line is reached.

return

be

performed.

sound

are released.

RESPONSE

printed

and

continuously

until

line feed will

end

until

Note:

cedure.

Options

Disconnect

433,

434,

Interface

and

Test

435

- Depress LOCAL (LOCAL-TALK)

Arrangement

if

present.

key

to

terminate

checkout

pro-

4. RO TESTING OFF-LINE TESTS

(Cont)

OFF-LINE

TABLED

TEST

PROCEDURES

MANUAL

391,

1-15

TEST

Power On/Off

Printer

Option

431.a.

432.a.

STEP PROCEDURE

1.

Turn

on

POWER SWITCH.

2.

3.

~PRINT

"'PRINT

Hold

PRINTER

approximately

HEAD

MARKER

INDICATOR

TEST

SCALE

key

depressed

eight lines are printed.

(Rear

until

View)

RESPONSE

Print

head

returns

left-hand margin. Paper feeds TERM READY

Print first

mark

to

head

'marker points on

indicator

scale.

ALARM Characters

Fig. (Refer 432b

6.

to

and c

turns

printed

Option

for

on.

any

exceptions. ) Bell rings

at

end

of line. (R.H. Margin Message.)

to

line.

as

431

each

or

the

on.

to

in

or

Test

Note:

l{nopqrs

•

• !"

•

Note

Iu

•

~lqj"stllYWXYZ{:

•

pqi"stllYwxyz{:

•

pqr'stllYwxyz{:

•

~Iqr'stllvwxyz{:

First line

may

start

with

any

character.

tuvwxyz{ : }..,

!"'.ZI'().~,-.I0123456789:·<=>?IABCDEFGHIJKLHNOPORSTUVUXYZ(\]A_'abcdefghiJkl"nop~rstuvwxyz{

!"'.ZI'()*+,-.I01234~6789:

!"'.%I'()*+,-.I01234~6789:

!"'.ZI'()*+,-./0123456789:

••

ZI'()*+,-.I0123456789:

!"'.ZI'().+,-.I01234~6789:

!"ltZI'()*+,-.I0123456789:

!"I.ZI'()*+,-.I0123456789:

1:

First line

Y W)( Y z { I } N does

!"HS%&'()*+,-.I0123456789:;<=>?@ABCDEFGHIJKlHNOPQRSTUVUXYZC\J~_'abcdef9hijkl"~

}"

may

start

<=>"ABCDEFGHIJKlHNOPORSTUVUXYZ(\]~_'abcdefghijkl"nopqrstuvwxyz{

<=>?'ABCDEFGHIJKL"NOPORSTUVUXYZ(\]~_'abcdefghiJkl"nopqrstuvwxyz{

<=>"ABCDEFGHIJKlHNOPORSTUVUXYZ[\]A_'abcdefghiJkl"nopqrstuvwxyz{ <=>?IABCDEFGHIJKlHNOPORSTUVUXYZ(\]A_'abcdefghijkl"nopqrstuvwxyz{ <=>"ABCDEFGHIJKlHNOPORSTUVUXYZ(\]A_'abcdefghijkl"nopqrstuvwxyz{ <=)?IABCDEFGHIJKlHNOPORSTUVUXYZ(\]A_'abcdefghijkl"nopqrstuvwxyz{ <=>"ABCDEFGHIJKlHNOPORSTUVUXYZ(\]A_'abcdefghijklMnopqrstuvwxyz{

(Sprocket Feed

with any character. Note

-13

Characters

per

inch)

2:

not

The lower case

print

on

80 character

"0"

}N

}N }N }H }N }N }N }N

lines~

!"HS%&'()*+,-.I0123456789:;<=>?@ABCDEFGHIJKlHNOPQRSTUVWXYZC\JA_'abcdefghijkl"n

}"

!"HS%&'()*+,-.I0123456789:;<=>?@ABCDEFGHIJKlHNOPQRSTUVUXYZC\J~_'abcdef9hijkl"n

!"

H S % &.' ( ) * + , - • I 0 1 2 3 4 5 6 7 8 9 : ; < = > ? @

}, }

....

..

ABC

II

(Friction Feed -

E F G H I J K l H N 0 P Q R

10

Characters per inch)

STU

V U X Y Z [ \ J

.... _ .,

it

bed

e f 9 h i j

",

1 III n

Fig. 8

391, 1-16

RO TESTING

4. OFF-LINE TESTS (Cont)

TABLE D (Cont)

TEST STEP

Printer (Cont)

Cover Interlock

Loopback

---

i---

1-----

4.

5.

6.

7.

S.

Release PRINTER TEST key.

Raise cover.

Close cover.

Depress RESET key.

Tum

off

POWER switch arrangement shown connector.

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

S.a.

- -

S.b.

TTL INTERFACE - Connect Terminal Ready

Data Ready. Turn

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

EIA INTERFACE - Connect Carrier Detect Data Term Ready. switch.

1------------------

S.c.

9.

Measure In terface Connector. TTL INTERFACE Data Ready.

Tum Remove Operator Console. Remove cover Switch during

continuity

off

POWER switch.

RO

OFF-LINE

PROCEDURE

on

Turn

on

Operator

and

manually depress INTERLOCK

test

procedure.

TEST PROCEDURES

and

connect

on

Page 1-2

Teleprinter POWER switch.

on

between pins 6

Connect Terminal Ready

Teleprinter POWER switch.

Console

to

the

Teleprinter POWER

and 9 on

and

install KSR

the

test

interface

to

TTL

to

RESPONSE

ALARM Character printing stops. Print head returns hand Paper feeds

ALARM TERM READY

ALARM remains on.

ALARM TERM READY

10---------

--

Print head returns hand margin. Paper feeds

DATA

turns

margin.

turns

----------

Print head

hand

margin. Paper feeds DAT A EIA INTERFACE CONNECTOR

+

pin Card). GND will be present pin

turns

12

V will

4 (Issue 2A Logic

7.

1-----------

Meter should read 0

(Issue 2A Logic Card).

head

Print hand

margin.

Paper feeds DAT A

turns

off.

to

turns

off.

turns

to

returns

to

be

present

returns

to

line.

to

line.

to

line.

to

line.

left-

off.

on.

left-

on

ohms

left-

TABLE D (Cont)

MANUAL

391,

1-17

TEST STEP

Loopback (Cont)

~---

10.

10.a.

II.

OFF-LINE

Tum

on

POWER switch.

f----------------

Depress

(P ARITY ON). Place DUPLEX DUPLEX). Place CAPS LOCK Type ANALOG Depress SPACE BAR.

and

the

following:

release PARITY

key

TEST

PROCEDURE

in

UP position (HALF-

key

in

PROCEDURES

key

to

DOWN position.

UP position

--

RESPONSE

TERM READY

[TTL

7. V will

11. V will be

13.

9.

turns

Interface

be

present

be

present

ANSW)

----------

W +5 V will pin

-12 pin +

12 pin GND will pin

AANNAALLOOGG is printed.

(AUTO

on.

Onl~

present

on

f-----

Option

433.a.

---

12.

13.

14.

Place DUPLEX DUPLEX). Type

the

TEST

Watch TERM READY (AUTO ANSW) key then' hold

CTRL

Depress

Hold CTRL key.

INTRPT

key

following:

key

depressed

key.

key

depressed

in

DOWN position (FULL

and

depress

and

depress RETURN

~

Eg"

~

key.

TEST

DATA

(AUTOANSW) flash as depressed.

(Refer for

INTRPT tarily. Signal bell rings.

Print return.

is

printed.

and

EOT

to

Option

any

exceptions.)

turns

head does

TERM READY'

key

is 433b

on

momen-

not

391,1-18

4. RO TESTING OFF-LINE TESTS (Cont)

TABLE D (Cont)

TEST STEP

Loopback

(Cont)

Option

435.a.

436.a.

1-----

Option

436.a.

r---'-

1-----

Option

437.a.

15.

16.

OFF-LINE TEST

PROCEDURE

Depress RETURN and

Depress

Hold

(check time

REPT

down

and

until

to

print

K keys.

two

line).

then

lines

LINE

of

1----------------------

Measure connector

Enable Depress

PARITY TEST

continuity

of

RO

Option

the

434b.

following keys:

between pins 4

opcon

that

1--------------------

Measure connector

continuity

of

RO

opcon

between pins 4 and

that

PROCEDURES

FEED

Ks

are printed

was removed.

key.

and 7 on

20

on

RESPONSE

Continuous printed line.

Bell rings automatic

feed will

One printed line plus return approximately: 4 seconds (sprocket feed)

2.5 seconds (friction feed) (Refer 436b

ro-

-

--

Meter should read circuit. (Refer 436b

Printer will

..RI"T.

(Refer any exceptions.)

---------

Meter should read

circuit.

Ks

will

across entire

at

end

of

return

be

will occur in

to

Option

for any exceptions.)

- -

to

Option

for any exceptions.)

TE.T

to

Option

and

performed.

435b

----

an

435b

print:

437b

an

be

new

line

open

and

or

--

open

or

for

-

Low-Paper (Friction Feed)

Paper-Out

(Sprocket Feed)

17.

18.

Remove Lift feed).

Watch DATA key key eight times.

the

paper

roll from

- Paper-out (sprocket feed). paper

support

and

depress LINE

- (friction

FEED

to

(Refer

for

Signal bell rings (sprocket feed only).

Alarm

S:Qrocket Feed

DATA LOCAL (LOCAL-TALK) turns is

received.

Friction Feed DATA remains

LOCAL (LOCAL-TALK) remains off.

Option

any exceptions.)

turns

on

as

8th

437b

on.

off.

LINE FEED

on.

for

TABLE D (Cont)

MANUAL

391,1-19

TEST

Low-Paper

(Friction Feed)

Paper-Out

(Sprocket Feed) (Cont)

Loopback

Clear

STEP

19.

20.

2l.

2l.a.

OFF-LINE

TEST

PROCEDURES

PROCEDURE

Depress TERM READY (AUTO ANSW) key.

Replace

the

paper.

Depress DATA key.

EIA

INTERFACE

Term

Ready

- Disconnect strap between

and

Carrier Detect.

Data

RESPONSE

SQrocket DATA remains

Feed

off.

LOCAL (LOCAL-TALK)

remains

on.

Friction Feed DA

T A

turns

off.

LOCAL (LOCAL-TALK)

turns

on.

ALARM flashes (sets

W/TDU).

ALARM

W/O

DATA

turns

TDU).

turns

off

on.

(sets

LOCAL (LOCAL-TALK) turns

off.

DATA

turns

off.

TERM

READY (AUTO ANSW)

turns

on.

----

21.b.

Low-Paper 22.

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

TTL

INTERFACE

Ready

Sprocket

and

Terminal Ready.

Feed - Remove paper. (Friction Feed)

Paper-Out

Friction Feed -

support. (Sprocket Feed)

24.

This completes

the the

KSR Interface

Remove

23.

Depress TERM READY (AUTO ANSW) 'key.

the

OFF-LINE

Operator

Replace

Console

test

paper.

of

and

Test Arrangement (if present)

Use local procedures and arrangements

- Disconnect strap between

Lift

paper

roll from

the

43

RO Teleprinter.

replace

for

the

ON-LINE testing.

RO

Operator

and

replace

paper

Data

roll

Console.

the

bustle cover

Signal bell rings

(sprocket feed only). TERM READY ANSW)

turns

(AUTO

off.

LOCAL (LOCAL-TALK) .

and

ALA:B.M

t\!J'Il

on.

TERM READY (AUTO ANSW) remains off. LOCAL (LOCAL-TALK)

and

ALARM

and

turns

paper

remain

off.

holder.

on.

~

391,1-20

RO VARIABLE FEATURES CHECKOUT

4.01 only. The features

are checked in

A.

Remove RO KSR Operator Console.

EIA

; shown

Connect Carrier Detect Tum

TTL 'shown 'Connect Terminal Ready

Tum

The procedures in Table F verify operation

Loopback Mode

INTERF

on

Page 1-2

on

Teleprinter POWER switch.

INTERF

on

Page 1-2

on

Teleprinter POWER switch.

of

variable feature exceptions

as

furnished from

the

off-line tests in Table D.

PROCEDURE

Operator

ACE - Connect

Console and install

the

to

the

interface connector. Printer performs one line feed.

to

Data Term Ready.

to

the

interface connector.

to

Data

LOOPBACK MODE PROCEDURES

test

the

test arrangement

Ready.

the

arrangement

proper

factory

TABLE E

4.02 teleprinter

the

Console (See Table E.)

Print head returns DATA

Off-line through

RO

turns

into

the

Operator

on.

checkout

437b

Console

RESPONSE

to

of

Options

will require placing

loopback

left-hand margin.

mode

with

and

a KSR

433b

the replacing Operator

B.

Variable Features

CHECK

Option

431.b.

andc.

(Option

•

!"It%'~()*+,-./112J456789:;<=>1'ABCDEFGHIJKl"NOPORSTUVUXYZ[\]+~'abcdet9hiJklMnopqrstuvwxyz{I}N

(Option 431.c.)

•

!lIlt%,~()*+,-./m23456789:;<=>?@ABCDEFGHIJKl"N!PORSTUVUXYZ[\]ti'abCdef9hijklMnOpQrstuYWXYZ{I}N

Depress

431. b. )

Checkout

TABLE F

FEATURES CHECKOUT PROCEDURES

TEST key.

and

VARIABLE

PROCEDURE RESPONSE

hold

PRINTER

~ ~

~

Fig.

9-Printer

Test Message

Characters Bell sounds

~~

printed

at

end

as in Fig. 9. of

each line.

TABLE H (Cont)

MANUAL

391,1-21

CHECK

Option

432.b. and

c.

*(Option

•

Depress

!"IS%I'()*+,-.I0123456789:;<=>?@ABCDEFGHIJKLHNOPORSTUVUXYZ[\)A

and

432.b.)

hijkl"nopqrstuywxyz{I}N

•

!ttIS%&'()*+,-.I01234S6789:;<=>?@ABCDEFGHIJKLHNOPORSTUVUXYZ[\]A_

hijkl"nopqrstuywxyz{I}N

*(Option

•

!"IS%I'()*+,-.I0123456789:;<=>1@ABCDEFGHIJKLHNOPORSTUVUXYZ[\]A_'abcdefghijkl"n

432.c.)

pqrstuywxyz{:}N

•

!"IS%I'()*+,-.I0123456789:;<=>!@ABCDEFGHIJKLHNOPORSTUVUXYZ[\]A_'abcdef~hijkl"n

pqrstuywxyz{:}N

*Sprocket

Feed

(13

V ARIABLE

PROCEDURE RESPONSE

hold

PRINTER

characters

FEATURES

TEST key.

CHECKOUT PROCEDURES

Note: The lower case

per

inch), Friction Feed

Fig.

10-Printer

Line length will be: 432 432 Characters Bell sounds

Note: . The

not

"0"

(10

characters

Test Message

b c -

pnnt

does

72

characters

80

characters

printed

at

lower

on

72

not

print

per

end

character

inch)

as in Fig.

of

each line.

case

"g"

-'abcdef

'abcdef

on

80

10.

does

lines.J

character

lines .

f

V ARIABLE FEATURES CHECKOUT PROCEDURES

CHECK PROCEDURE

Option

433.b.

Option

434.b. Option

435.b.

Place teleprinter in Depress position

Depress ABC Hold

depress

Place Depress DUPLEX key position

Depress REPT Hold

DUPLEX key

(FULL

the

following keys:

CTRL

teleprinter

down

key

ij

EgT

NOT APPLICABLE

(FULL

until

loopback

DUPLEX).

depressed

~

key.

in

loopback

DUPLEX).

and

K keys.

end

to

of

line is reached.

I

mode.

DOWN

and

mode.

DOWN

TABLE H (Cont)

RESPONSE

Printer DATA remains TERM READY off depressed.

Checked Characters will

of Automatic not

Bell will

keys are released.

will

print

(does

not

flash) as EOT

inStep

line is reached.

return

be

performed.

sound

ABC.

on

(does

not

flash).

(AUTO ANSW) remains

key

is

16

of

Off-Line Tests.

be

printed and

continuously

until

end

line feed will

until

391,1-22

RO

VARIABLE FEATURES CHECKOUT (Cont)

CHECK Option

436.b.

Option

437.b.

VARIABLE

PROCEDURE Place teleprinter Depress DUPLEX

in

loopback

key

to

DOWN

position (FULL DUPLEX). Place CPS

key

in DOWN position

(10 CPS). Depress REPT Hold

down

and

until

K keys.

two

lines

printed.

Measure 1 7

Enable

Place

continuity

on

RO

Option

teleprinter

opcon

434b.

between

connector.

in

loopback

TABLE H

FEATURES

mode.

of

Ks

are

pins 4

and

mode.

(Cont)

CHECKOUT PROCEDURES

RESPONSE

Continuous Ks will

entire line.

at

return

end

and

Bell rings matic performed.

One printed line plus occur

in

approximately:

14

seconds (sprocket feed)

8.5 seconds (friction feed) part

of

First imately printed

second line (approx-

18

characters) will be

at

a faster

Meter should read

be

printed

of

line

and

line feed will

return

rate

of

speed.

0 ohms.

across

auto-

be

will

Place

CAPS

Depress (FULL

DUPLEX).

Depress PARITY

Measure 20

on

RG.

LOCK

DUPLEX key

the

following keys:

TEST

continuity

opcon

key in DOWN position.

to

DOWN position

between

pins 4

and

connector.

Note: Disconnect Interface Test arrangement,

Printer will

PARITY TEST.

Meter should read 0 ohms.

if

present. Replace RO

print:

operator

console.

MANUAL

391,2-1

CONTENTS

1.

GENERAL TROUBLESHOOTING FLOW

2. DIAGRAM

TROUBLESHOOTING

KSR

3. TROUBLESHOOTING GUIDE

(Teleprinter

4.

RO

TROUBLESHOOTING

TROUBLESHOOTING GUIDE

(Teleprinter

5.

POWER SUPPLY TROUBLE-

SHOOTING TROUBLESHOOTING GUIDE 410700

PONENT SEMICONDUCTORS AND

INTEGRATED IDENTIFICATION AND LEAD DESIGNATION

SEMICONDUCTOR IN-CIRCUIT STATIC FORWARD RESISTANCE

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

without

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

CIRCUIT CARD COM-

LAyOUT

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

TDU)

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

CIRCUITS

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

PART

......

........

.....

2 - TROUBLESHOOTING

PAGE

1

3 4

4

10

15 15

16

17

STATIC

8.

KSR

OPERATOR

TROUBLESHOOTING TROUBLESHOOTING GUIDE 410080

COMPONENT COMPONENT

AND LEAD DESIGNATION SEMICONDUCTOR IN-CIRCUIT

STATIC ANCE

ST ATIC CIRCUIT RESISTANCE TRANSMITTED CODES RO

9. TROUBLESHOOTING

TROUBLESHOOTING 410741

COMPONENT COMPONENT

AND LEAD DESIGNATION

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

OPERATOR

CONTENTS

CIRCUIT RESISTANCE

CONSOLE

...........

LOGIC

FORWARD

LOGIC

CARD

LAyOUT IDENTIFICATION

CONSOLE

CARD

LAyOUT IDENTIFICATION

..........

......

RESIST-

.........

...........

GUIDE

..........

......

.....

...

PAGE

26

27 27

32

32 32 33

35 35

37

ST ATIC CIRCUIT RESISTANCE

PRINTER

6. TROUBLESHOOTING GUIDE LOGIC CARD TROUBLE-

7.

SHOOTING

TROUBLESHOOTING GUIDE 410740

CARD COMPONENT COMPONENT IDENTIFICATION Center

AND LEAD TEST

READINGS SEMICONDUCTOR IN-CIRCUIT

STATIC FORWARD RESISTANCE

TROUBLESHOOTING

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

AND

410742

DESIGNATION

POINTS AND VOLTAGE

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

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

CIRCUIT LAYOUT

.....

...

......

...

..

17

18 18

20 20

23

'

23

24

26

STATIC TEST POINTS AND VOLTAGE

READINGS

GENERAL

1.

1.01 power

including KSR

and

should be sent

for

1.02 and

the

these

components

the

component. component paragraphs.

CIRCUIT

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

This

part

provides

mation

supply, friction

Teleprinter

isolation

correction

the

print

RO

operator

repair.

is

provided

for

the

head

to

the

troubleshooting

of

troubles of

in

the

Isolation

RESISTANCE

43

or

and

console. Defective TAUs

Teletype

troubles,

teleprinter in

troubleshooting

KSR

and

RO

sprocket

logic cards,

to

of

troubles

the

feed

Product

is based

major

components,

by

replacement

or

major

by

...

teleprinter,

within

component

37

38

infor-

printer,

and

the

Service

on

of

repairing

the

391,2-2

1.03

Major ated

component

either troubleshooting major

component

observed.

1.04

Analysis in graph is

within

the

major

interface.

1.05 component

the no

1.06

When

When a

replacement

does

not

should

step

of

steps provided, go

component ponent) be

within the teleprinter

1.07

the

used

to

the

trouble

When

major

help

component.

is

not

paragraph

Service

or

major

tainer

includes with protection.

components

in

which

the

KSR

conductive

Refer

information.

1.08 346392

for are provided saved

The

KSR

be

damaged

static discharge

use

by

service personnel. Maintenance spares

for

reuse

in

repair.

by

paragraph

is

"suspected"

the

limited

component

correct

be

the

trouble

(by

component

isolate in

the

for

returned

Center

the

replacement

opcon

to

operator

anti

static bags which should

when

troubleshooting

the

KSR

or

RO

teleprinter

or

when

trouble

from

symptoms

major

to

the

reinstalled

is verified

replacement

component

isolating

up

to

of a major

trouble,

before

analysis.

to

the

to

the

its electrical

component

the

original

going

If

there

last step.

be

in a major

of

that

paragraph should

and

correct

the

Where analysis indicates

component,

further

to

the

for repair,

shall be

return

analysis.

Teletype

the

packed

Product

teleprinter

in

the

is received. This

(black) plastic bag used

and

the

Packing,

logic card

Part 7 for

for

packing

console circuitry

by

static discharge.

ground

retur:r~ing

strap

is available

components

is initi-

in

the

para-

trouble

to

are

com-

trouble

to

the

con-

static

can

The

be

for

1.11 before

1.12

When replacing

wait

10

removing

The

printer

replaceable corrected maintenance

1.13

by

Use

adjustments

spares

meter

resistance readings. Resistance readings shown lower

are

approximate

than

those

used.

1.14 circuit cards

1.15

Verify

sent

and

or

Before applying

sink removed power located

nector

1.16

supply,

on

the

or

on

If

the

either

marks (see Fig.

(a) Red line (b) Red

1.17

each

of

and

If

the

dot

C9.

the

mark

three

trOUbleshooting

1.18 and

mark

C9

is

If

the

for

not

one

heat

vent present

the seconds the

fuse.

is

after

not

item.

or

other

RX1

and

specified,

proper

operating voltages are pre-

correct

replacing

before

integrated

power

or

attempting

check

circuit

number

of

end

the

board

of

the

is

9300

following

1): under

fuse.

on

top

ID

number

is

present

capacitors,

or

repair procedures.

of

the

marks

sink

and

check

mark. Replace

(see Fig. 1).

power

supply

turning

off

fuse,

power

considered a field

Any

trouble

by

replacement

replaceable

scale

when

may

depending

be

can

parts.

making

higher

on

meter

with

troubleshooting

circuit

with

cover

repair

identification

the

packs.

or

heat

of

number

ac con-

line filter (see Fig. 1).

or

less,

check

identification

of

capacitors

9300

or

under

the

proceed

is

not

present

C7, C8

greater

fuse

with

remove

or

capacitors C7, C8 capacitors

if

vent

be

or

the

for

if

on

the

1.09 before

vent the

1.10 Make certain

properly Replace cables

Check resistance

connecting

overloading

fuse

when

and

of

them

the

power

verify

defective

to

the

power

is

turned

proper

major

teleprinter,

supply

on.

Before disconnecting internal cables replacing

polarized

circuit

power

before

cards,

cord is

and

grounded

turning

tum

on

static circuit

components

and

blowing

off

ac power.

connected

ac

power.

to

pre-

or

to

outlet.

1.19 from

charge 430704

1.20

a

indelible felt proceed

Replacement purpose can be

Teletype

per

Corporation

Manual

capacitor.

Mark

top

of

dot

and

draw a red

tip

marker). Replace

with

the

vented

capacitors

obtained

by

indicating

391"

on

the

vented

capacitors

line

under

troubleshooting

at

no

order

heat

or

for

this

charge

"No

for

the

with

red

fuse (use

sink

and

repair

procedures.

LINE

FILTER

CAPACITORS

MANUAL

391,

2-3

.............:::::::!!!~'t;t.L.;;;,

CAPACITOR

VENT

MARK

(Obs~rve

polarl~Y

replacmg.)

proper

when

CONNECTOR

AC

'Ii""

;,

"Js.

-~

~I!

II

4i:"-'7'

IDENTIFICA

NUMBER

Fig.

TION

1-430704

2. TROUBLESHOOTING FLOW DIAGRAM

III

PART

1

Paragraph 3

in

this

Part.

As

directed

Paragraph 3

in

this Part.

Paragraph 5, and 9 in

this

and

in

and

6, Part.

4

7, 8

,

LOCAL AND ON-LINE TESTS

TROUBLE IN

CONFIRM

REPLACE MAJOR COMPONENT

OR

OTHER

CORRECTIVE ACTION

TROUBLE CORRECTED

IN

TELEPRINTER

CIRCUIT

BOARD

Capacitor

Replacement

\JV

TELEPRINTER

/

r"

\V

DEFECT

......

'"

\V

NO

......

'"

YES

\/

ISOLATE AND CORRECT TROUBLE IN

MAJOR COMPONENT

FUSE

DISASSEMBL Y

AND

REASSEMBLY

PART

3

REINSTALL MAJOR COM-

PONENT IN

TELEPRINTER

i

PARTS AND

UNIT CODES

PARTS

\1

DISASSEMBL Y

AND

REASSEMBLY

PART 3

\1

CIRCUIT DESCRIP-

TION AND

DIAGRAMS

PART 4

\V

ADJUSTMENTS

SPRING

AND

TENSIONS

PART

5

391,2-4

3.

KSR

TROP~~

....

ESHOOTING

TROUBLESHOOTING

QUESTIONS

1.

Are

any

of

the

mode

indicators

and

set

power

keys

if

proper

--

1a.

- - - - - - - - - -

Is

there

any

in

the

set?

(Indicators power lamp

is

on

turned power

- - - -

1 b. Is

red

lamp

GUIDE

three

lit?

on.)

(Depress

indicator

indication

on

and

supply,

.-

- - - -

on

power

(Teleprinter

communications

(Power

not

of

power

flash

off,

etc.)

available

other lit.)

when

red

--

supply

lit? Check

without

Go

~-

Go

to

2.

-

lb.

TDU)

YES

--

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

P107

opcon

connector. Replace logic card. Replace

opcon.

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

lc.

Does

red

lamp

on

power

now

light?

~

..

- - - - - - - - - - -

1d.

Does

red

lamp

on

power

still ligh

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

1e. Does

go printer one

~

- - - - - - - - - - -

2. Does ALARM

1. Flash?

2.

t?

red

lamp

out

after

cables are

at a time?

Light

(cover closed

paper

installed)?

on

power

the

TAU,

reconnected

indicator:

supply

opcon

and

Unplug opcon cables. Reconnect

cable. Go

-I-

- -

Go

-I-

- - - - - -

Replace or (refer shooting) lamp

-I-

- - - - - -,-- - - - -

1. Replace logic card. Go

2. Replace

TAU,

and

to

1d.

,,-

- -

to

1e.

the

printer

to

printer

that

to

extinguish.

to

printer

shooting.

if

printer power

TAU,

component

caused

opcon

trouble-

NO

Go

to

1a.

--_._---------

Check if

Replace blows again.

If

cable

--

present,

(6) supply. Replace

supply

..

- -

opcon

trouble-

or

refer

Disconnect Go

--

Check

Replace

,-

-I-

Replace logic card.

-I-

Intermittent Check between terminals.

and

replace

blown.

power

not

to

blown

lc.

go

power

- - - - - - - -

F2

fuse

power rear

frame assembly.

- - - - - - -

-.

- - -

short.

for

foreign

circuit

--

- - - - - - -

to

3.

set

FI

supply

to

if

lb.

supply cable.

-.-

on

power

if

blown.

supply.

--

-.

- - - - -

objects

lands

or

fuse

---

--

- -

--

MANUAL

391,

2-5

QUESTIONS

3. Does

100--

3a. Does

4.

--

4a.

~-

4b.

I---

- - - - - -

4c. Does

LOCAL

when

depressed?

--

DATA

Does

test

properly

key

is

depressed?

--

Is

red

lamp

- -

Does

red

light? cable.

anything

indicator

--

-

--------~-

indicator

message

while

the

----.----------,---~-----------

on

power

-----

lamp

on

print

light

go

out?

print

and

PRINTER

supply

power

supply

.-

or

perform?

perform

TEST

lit?

----~---

- -

Go

Replace logic

Go

now

Reconnect

Unplug motor nect

isolate cause

lit.

Replace

nent

troubleshooting).

-I-

- - - - - - -

Go

to

-

to

one

(refer

to

4.

4c.

YES

--

---

card~

5.

------~---

power

print

head

cables

4d.

then

at a time

of

defective

to

printer

supply

and reconto

lamp

compo

-

not

Go

-1---

Replace

Check

Go Disconnect Go

Replace

..

-1--

Place

SPD4-2

position.

NO

to

3a.

- - - - - - - - -

opcon.

option

to

4a

to

4b.

- - - - - - - - - -

printer

431

power

- - - -

power

on

logic

If

test

ok

supply.

replace

and

supply

bypass

card

432.

-.--

switch

to

ON

opcon.

cable.

- -

4d.

------

Does

anything

---

print?

1---------------1-------

4e. Are

- - -

4f.

--------------------1---

4g. Is

'----

characters

--

Are

the

print

ribbon)?

-

--

proper

density

---~-

properly

--

-

characters

acceptable

formed?

-----1-----

printed?

(good

- -- - - - - -

---

Go

to

4e. Replace logic card.

Go

to

4f.

Go

to

4g.

May

be

undefined

ing

problem.

Refer

to

printer

shooting.

Replace logic

Go

to

4h.

---

----

card.

---

-

--1------

---

print-

trouble-

--

R(\place logic card.

--

-----------

Refer

to

printer

shootin~,

troublp-

----

Refer

to

printer

shooting. Replace logic card.

trouble-

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

Replace logic card.

---

Refer

to

shooting,

-

--

printer

--

trouble-

--

---

391,

3.

2-6

KSR

TROUBLESHOOTING

(Cont)

TROUBLESHOOTING

QUESTION

4h.

Does

paper

feed

supply

--

4i. Does

properly?

5.

Did prin

free)?

- - --

print

ALARM ter

test?

-----

head

indicator

----------'

5a. Does ALARM

cover is

6. Does ALARM when

1.

2. cover is

opened?

paper

is

out

opened?

indicator

GUIDE

properly

space

and

when

(Teleprinter

(paper

--------

and

return

light

during

------

light

when

light

without

Go

to

4i.

TDU)

YES

(Cont)

-----

Undefined printer

Refer shooting.

Go

to

test

to

6.

printer

problem

functions.

trouble-

---

Replace logic card.

Go

to

7.

Check

Replace line feed blows again.

Refer shooting.

Replace logic

--

in

Refer

shooting.

Replace logic card.

Go

----------

Replace

1.

2. Replace

F3

fuse

to

printer

------

to

printer

to

5a.

opcon.

Check shooting.

printer

NO

on

motor

trouble-

card.

trouble-

opcon.

logic card.

if

fuse

--

-----

trouble-

7.

Do

all

characters

tions

(except

perform keyboard

mode)?

S.

1'----

Does signal bell ring

---------

Sa.

Did signal bell ring printer

9. Does signal bell ring

~~nb~oreri~tmar~nmd~

left

and

10.

Are margins properly?

when

are

test?

right

bell

operated

margins?

set

the

and

print

and

keys

on

during

eight

cleared

and

func~

margin set)

on

the

(local

CTRL

G?

----

char-

Go

to

S.

Go

to

9.

- -- - - - - -

Replace logic card. Replace

Go

to

opcon.

10.

11.

3. Replace logic card. Replace

Replace logic card.

Go

-.-

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

Check

Refer

shooting.

Replace logic card.

Check ing Replace logic card.

opcon.

to

Sa.

PI06

bell

to

printer

column

adjustment.

connector.

(bell)

indicator

trouble-

position-

MANUAL

391,2-7

QUESTION Does

11.

12.

13. Does external device

(TTL interface - Data Ready, pin

printer

to

key board operation in loop-

mode

back strapped)?

Did ALARM indicator flash and DATA indicator light during loopback?

interface mode

(DATA indicator depressed,

exclusion key lifted, etc)?

respond properly

(interface

connected

connector

go

connector

to

data

15

to

on,

Go

to

YES

12.

13.

14.

o V) (EIA interface - Carrier Detect,

on,

pin 8

~------------~--------r------

13a. Is Terminal Ready

'----

13b. Does external device require Use issue 2A logic card

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

13c. Is

+3 V)

interface on,·

READY

-

----

Request to

interface

(AUTO ANSWER)

---

to

be

on?

Data

Term Ready

on,

5, TTL Go

0 V? TERM

on?

----

Send (EIA interface) strap ON in cable. in external device.

--

---

to

13b.

---

Sets with TAU - go

13c.

- - -

to

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

20

EIA Trouble

+3 V? device.

is

in external Replace TAU.

Check P301

Replace logic card. Replace Terminal Aux. Unit

(if present).

Replace logic card. Replace opcon.

to

13a.

Go

Replace logic card.

-~-

or

Sets

--

without

- - - -

---------

NO

connector.

-----

TAU -

trouble

---

is·

on

14.

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

14a. Is EIA interface Clear

(Request external device - strapped logic card present.)

Does DATA indicator light when external device is in data

mode?

5, Carrier

Data

to

Set

Send

Detect

Ready, pin 6

on

if

required

opcon

to

Send, Go

8,

on,

+3 V?

by

or

Issue

and

2A

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

14b.

15.

Is

TTL

15

on?

data

Are and

received in

interface

messages properly sent

Data

the

Ready, pin Replace logic card. Replace TAU.

data

mode?

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

15a.

16.

Do

PARITY, DUPLEX

keys alternately

up

release Can any

when depressed.

data

be received?

lock

and

down

CPS Go

and

Go

to

15.

---------

to

14b.

---

Go

to

18.

-~

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

to

16.

to

17.

Go

-

--

Go

to

--

Trouble

-.~-

- -

Go

to

Replace opcon.

Go

to

14a.

---------

is

external device.

---

15a.

25.

--

-

---

-'-

391,

3.

2-8

KSR

TROUBLESHOOTING

(Cont)

TROUBLESHOOTING GUIDE

QUESTION

17.

Does on

some

substitute

characters (PARITY

character

key on)?

18.

Does

printer transmit (DATA

Is

19.

printer

transmission

(DAT A

20. Does

the matically right

of

are received (DATA

copy

properly

indicator

blinded

in

full

indicator

carriage

when

characters

the

right

and

data

in

half-duplex

lit)?

to

keyboard

duplex

lit)?

return

hand

margin

indicator

lit)?

(Teleprinter

print

auto-

to

the

without

Remote sending be

at

different

to

Go

to

Go

to

Go

to

TDU)

YES

station

incorrect

22.

19.

20.

21.

(Cont)

may

parity

speed.

be

Go

to

18.

or

Check

Replace

option

opcon.

Replace logic card.

Go

to

25.

Replace

opcon. Replace logic card. Check

option

Replace logic card.

NO

434.

435.

Does

21.

Term momentarily and

when

(in

data

on

switched

Is

22.

INTRPT

----------

22a. Does

23.

INTRPT off

when

Does

INTRPT briefly INTRPT

Ready

on

carrier

mode)

(call

network)?

indicator

depressed?

indicator

and

bell ring

indicator

turn

off

received

is

not

EOT

received

disconnect

lit?

go

light

when

is depressed?

Go

to

22.

(Interrupt Go

to

22a.

~--------

Go

to

23.

Go

to

24.

received)

Check

option Replace logic card. Replace

Go

1--.

Replace

to

23.

----------

TAU

opcon. Replace logic card. Go

to

25.

Replace

opcon.

Replace logic card.

433.

if

present.

MANUAL

391,

2-9

24.

25.

26.

Does

remote

interrupt?

station

Does end

tests

trouble

Is by

Questions 1

QUESTION

station

receive

pass on-line end-to-

with

Testing

present

to

but 25?

Station?

not

defined

YES

Go

to

26.

Trouble in

Refer

remote

to

(if

any)

station.

printer troubleshooting symtoms.

Replace supply, and/or correct

opcon,

TAU,

print

head

trouble.

is

or for

power

logic

opcon

other

card

to

Go

to

25.

Perform

or

distortion,

other

locally developed

including digital

control isolate

of

Testing

trouble

logic card.

NO

dBm

loop-back

Station

to

line,

level,

to

TAU

tests

under

or

391,2-10

4.

RO

TROUBLESHOOTING

QUESTIONS

1. Are

--

la.

- - - -

lb.

----

lc.

~.--------

ld.

any (Power (Depress not

lit.)

-'-

---

Is

there

~n

the

set? power lamp

on

Is

red

lamp

Does

red

now

light?

Does

red

still ligh

of

the 3 mode

available

other

-

any

indication

(Indicators

is

turned

power

.-

on

-

--

lamp

t?

and

keys

on

supply,

power

on

--------

Ie.

Does

red

lamp

on

go

out

after

the

TAU, printer one

cables

at a time?

are

GUIDE

if

--

and

(Teleprinter

indicators

set

power

proper

-

of

power

flash

off,

etc.)

on.)

key

---

when red

lit?

without

Go

to

2.

-----

Go

to

lb.

TDU)

YES

-',-------

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

supply

-

power

----

power

opcon

reconnected

lit? Check

--,

--

supply

----~------

supply

and

PI07

opcon

connector.

Replace logic card. Replace

- - - - - -

Unplug opcon

cables.

Reconnect cable.

Go Go

--

-----------,---------

Replace

or (refer shooting) lamp

to to

the

and

ld. Ie.

printer

to

opcon.

-------

TAU

~f

present,

pnnter

power

the

TAU,

component

printer

that

caused terminals.

extinguish.

cable

(6)

supply

opcon

trouble-

NO

Go

to

la.

------

Check if

Replace blows again.

If

--

Disconnect Go

Check

supply. Replace

Replace Replace rear

1---------

Replace logic card.

Intermittent Check between

and

blown.

not

blown

- -

to

lc.

--

F2

replace

power

go

--,

power

---------

fuse

power

frame

short.

for

foreign

circuit

set

FI

supply

to

if

lb.

- - - -

supply

on

power

if

blown.

supply.

assembly.

objects

lands

or

fuse

--

cable.

----

2. Does ALARM

1. Flash?

Light

2.

paper

indicator:

(cover installed)?i

closed

and

1.

Replace logic card.

2. Replace to shooting.

printer

opcon

trouble-

or

refer

Go

to

3.

MANUAL

391,

2-11

QUESTIONS

3. Does

4.

5.

.....

- - -

5a. Is

1--

5b.

RESET carriage the

TERM

depressed (ALARM

Does

PRINTER

the

printer line feed READY

Does

test properly key

is

red

lamp

- -

Does

red

light? cable.

key

return

depressed?

line feed

READY

TEST

to

carriage

and

tum

indicator

message

while

the

----.-

on

power

-----

lamp

on

cause

the

and

indicator

key

return

on

the

when

released?

print

and

PRINTER

supply

power

printer

turn

when

off)?

cause·

and

TERM

perform

TEST

---~

lit?

-

supply

---~---

to

on

now

YES

Go

to

4.

Go

to

5.

Go

to

6.

-

---

Go

to

5c.

---

Reconnect

Unplug motor nect isolate cause lit.

print

cables

one

at a time

-,--

power

head then

of

lamp

-------

supply

and reconto

not

Replace

Replace logic card.

Replace Replace logic card.

Check

Go

-~--

Disconnect Go Replace

opcon.

option

to

5a

.

---------

to

5b.

power

NO

431

and

power

- - - -

supply

supply.

432.

cable.

-.--

Replace defective nent

(refer

troubleshooting).

--

5c. Does

----------

5d.

~-.-----------""-----------------

5e. Are

--

5f. Are

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

5g. Is

- - - -

anything

Does

anything

characters

- -

the

print

ribbon)?

--

proper

density

-'--

print

or

print?

properly

--

-

characters

acceptable

--~

perform?

.......

--

formed?

----------

printed?

(good

- -

Go

to

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

Go

to

Go

to

Go

to

May

be

ing

problem.

Refer shooting.

to

--

5d.

5e.

5f.

--

5g.

undefined

to

printer

compo

printer

-

-----

--

print-

trouble-

..

-

the

ON

replace

----

position.

Place switch SPD4-2 to Ifok,

Replace logic card.

-

Replace logic card. Refer

to

shootin~.

Refer

to

shooting.

Replace logic card.

- -

-

Replace logic card.

--

---

Refer

to

shooting.

printer

on

opcon.

--------

printer

trouhle-

trouble-

--

printer

trouble-

test

logic

--

bypass

card

--

---

-.--

---

-------~-

Replace logic card.

Go

to

5h.

-

--

-

---

--'--

-------

- ----...,j

391,2-12

4.

RO

TROUBLESHOOTING

(Cont)

TROUBLESHOOTING

QUESTION

5h.

Does

paper

supply

- - - - -

5i.

Does properly?

6. Did

-

6a.

7.

printer

--

Does cover

Does

1.

paper

2.

cover

ALARM

feed

free)?

--

print

head

test?

--

ALARM

is

opened?

ALARM

is

out

is

opl'ned?

indicator

GUIDE

properly

--

- - -

space

and

---

indicator

and

when

(Teleprinter

(paper

return

light

during

-----r--

light

whpn Replacp logic

light

when

without

Go

-r-

-

Undefined printer

Refer

shooting.

Go

to

--

TDU)

5i.

test

to

7.

8.

printer

(Cont)

YES

--

problem

functions.

trouble-

--

card.

NO

Check Replace blows

shooting.

--

-

--

in

--

----

F3

fuse

line

again.

Refer

to

printer

Replace Refer

shooting. Replace logic

Go

Rl'placl'

1.

2.

logic

--

to

printl'r

to

6a.

OpCOI1.

Clwc k shooting.

Replace

printer

on

feed

motor

troublt'-

card.

--

troublt·-

card.

-

---

opcon.

logic

card.

--

- - -

trouble-

if fuse

---

8.

Does

signal bell ring

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

CTRL

8a.

9.

10. properly

G?

Did

signal bell ring

printer

Does

signal bell ring acters left

and

Are

margins

test?

before

right

on-line?

right

margins?

set

and

on

received

during

eight

margin

cleared

----

char-

and

at

Go

to

9.

- - - - - - - - -

Replace

Go

to

logic

opcon.

10.

11.

card.

3.

Rpplac(' logic

Go

to

8a.

.~

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

Check

Rl'fer shooting.

Replace

Rt'place

Replace

PI06

to

print!'r

logic card.

logic

card.

bell

connector.

(lwll)

card.

troubh·-

MANUAL

391,

2-13

QUESTION

II.

(TTL

o V)(EIA

pin 8 on,

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

11a.

Does

external interface mode sion key

interface -Data

interface

+3 V)

Is Terminal interface

UTO ANSW)

(A

connector

(data

lifted,

- Carrier

on,

key

Ready

0 V, TERM READY

device

go

depressed, exclu-

etc)? Ready,

indicator

t------------------

lIb.

--

11c.

12.

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

12a.

Does

Request to

be

---

----

Data

Is EIA interface

Does DATA light

when

mode?

Is EIA pin 5, Carrier Data

external

to

Send

on?

Term

indicator

external

interface

Set

Ready,

device require Use issue 2A logic card

(EIA interface)

----

Ready

on,

Detect

+3 V?

device

Clear

pin 6 on,

connected

to

data

15

Detect,

5,

TTL

on?

-----

20,

on

opcon

in

data

to

Send,

8,

and

+3 V.

to

Go

to

on,

~----------

-

Go

to

-----------

strap

Sets

with

Go

to

to--------

Trouble device.

Go

to

~---------

Go

to

YES

12.

lIb.

ON in cable.

TAU

if

present,

11c.

-----

is

in

external

13.

12b.

Go

to

11a.

to-

-----

Replace logic card.

t------

or

Sets

without

in

external

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

Replace

Go

to

TAU

12a.

----

Trou

ble

is

NO

---

-

------

TAU -Trouble

device.

if

present.

--------

external

devi,ce.

---

is

(Request external logic card

t----

12b.

15.

16.

------

13.

14.

Does on enabled)?

Does matically the gin are received (DATA lit)?

to

Send

on

device -

present.)

Is

TTL

15

on?

Are and

Can

some characters

right

strapped

interface

data

messages

received in

any

data

substitute

the

carriage

when

of

the

,if

required

or

Issue 2A

---------

Data

Ready,

properly

the

data

be received?

character

(option

return

characters

right

hand

by

pin Replace logic card.

sent

mode?

print

437a.

auto-

to

mar-

indicator

-----------

Go

to

16.

Go

to

15.

Remote sending be (Check

Go Go

at

different

option

to

18.

to

17.

station

incorrect

may

parity

speed.

436).

be

t-o-----

Replace

Go

Replace logic card. Replace

Go

or

Check Replace logic card.

to

TAU

13a.

TAU

19.

16.

option

---

if

present

if

present.

435.

-----

391,2-14

4.

RO

TROUBLESHOOTING

(Cont)

TROUBLESHOOTING GUIDE (Teleprinter

QUESTION

17.

18.

Does call EOT

and

received (in

Does

remote

disconnect when

carrier

data

mode)?

station

receive

on

received

is

not

interrupt? Does

19. end

20. Is

station

tests with

trouhle

by

Questions 1 to

pass on-line end-to-

Testmg

present

hut

Station?

not

28?

defined

without

TDU)

YES

Go

to

18.

Go

to

29.

TrouhlE' (if in

rE'motl'

H.,pfer troubleshooting symtoms.

to

printer

any)

station.

(Cont)

is

or

opcon

for

othpr

NO

Check

option

433.

Replace logic card.

Replace

Go

Perform or including digital control isolate present

TAU

if

present.

to

28.

distortion,

other

locally developed tests,

loop-back

of

Testing

trouble

or

to

logic card.

dBm

Station

line,

TAU

level,

under

to

if

Replace

opcon, supply, TAU, logic

card

and/or

head

to

correct

power

if

present,

print

trouble.

5. POWER SUPPLY TROUBLESHOOTING TROUBLESHOOTING GUIDE

MANUAL

391,2-15

Is

1.

--

1a. Does

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

lb.

the

(Power applied

----

flash then turned

Are J201:

1-------

1c.

I--

1d.

1-------

1e.

~-

1f.

Is +5 range

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

Is -12 V range

Is +12 V

range

-

Is +42 V range

----------~--------I----------.-

QUESTION

red

indicator

--------

the

red

(tum

on

go off)

on?

any

voltages

5,6 +5 V

8

7 +12 V

1,3

present

on

J201

present

on

J201

present

on

J201

present

J201

YES

lamp

on

and

on)?

--

indicator

momentarily

when

-12 +42

lamp Check ML5, ML6, ML7.

and

power

present

V

V diagram).

is source. (See

on

------

and

within

5?

and

within

8?

--

- -

and

pins 1

7?

and

--

within

3.

Go

to

-

----

Apply Circuit Diagram.)

Check overvoltage circuit.

- -

--~-

-------

Go

to

-----

Go

to

------

Go

to

---------

Go

to

Check Check

2.

- - - -

external

components

1c.

1d.

1e.

1f.

ML4. CR28.

voltage

Power

Supply

in

-

--~----

- -

Go

to

1a.

------

Check Go

to

---

----

Check ac-dc

circuit

Check

control

Note

202

Check primary

Check CheckML5. Check

--

Check

CheckML6.

Check

~---------

Check CheckML7. Check

Check Check Check

NO

--

fuse

F2.

lb.

components

..

oscillator

circuit

on

components

circuit.

and

(see

crrcuit.

---'

CR16. T1

(F

-M).

--

CR18. T1 CR19. T1 fuse

CR17. T1

--

(C-D).

(B-C).

F2.

(E-A).

--

in

----

---

2.

Are all voltages range

on

J201

present

?

and

No

problem -good

power

supply.

Check Check Go

to

ML4. CR28.

lb.

391,

2-16

5. POWER SUPPLY TROUBLESHOOTING (Cont) 410700

CIJl,CUIT CARD COMPONENT LAYOUT

NONCOMPONENT SIDE before applying

Caution: See paragraphs removed

or

power

attempting

with cover

repair

1.15

of

through

or

heat sink

the

power

1.20 supply.

~--~~==~~------------~~~----~

0

9ftiDo~

~

~:

tC\

~

8

'':'-i!~~~

__

;};~

-ll:

~:c:5

~

CR"

CRI4 CRI7

(j1i)c(CJ=

~"" " ~·G

-u..ii-J"""

8

Mll

CR21

Anode

~

- "U_...r -

,-_...r

CR5

=a=:::}o 9CJ=

~~

~""~:~J-:~+,,

I r • "

r :

I I

I I L_J

"CJ

SEMICONDUCTORS AND INTEGRATED CIRCUITS IDENTIFICATION AND LEAD DESIGNATION

CI

CR25

~4~1=

..........

'c

-an-

~

9I:::::P~~CR9

~

9!!l)=>

@

Q3

3

D

~

c{!D=o

rJ4

[I

J'

,~l

T2

C~,:3

0 0

2

0 8

CRI6~

CRI9

CR20-tI:J-

~

-c::::IJ-

~

a 0

R28

~

t;;

Bu

-rnnr-

~

i~"1xr

+ +

CI3

- -

~ ~

~

~n~

CR24~

a

~

-mIl-

5-1

BL3

~

~~r~~

~

~ I ~

~a@

~-cBm-

g-¥.lili:

ML

"-

(('~

' c

I\Ml6

, @

@a/-~

~

,,@(

ML7

~/

)~

-mn:r-

~

-«rn-

0

~

FI-

a

Anode

Ga~

Cathode

CR5-CR20 CR22-CR24

CR26 CR27 CR31

c

Cathode

A

Anode

Cathode

CR1-4 CR29 CR30 CR32

c

Cathode

A

Anode

MANUAL

391,

2-17

SEMICONDUCTOR -

COMPONENT

CRI CR2 CR3 CR4 CR5 CR6 CR7 CR8 CR9 CRI0 CRll CR12 CR13 CR14 CR15 CR16

CR17

CR18 CR19 CR20 CR21

G-C

G-A CR22 CR23 CR24 CR25

G-C

G-A CR26 CR27 CR28 CR29

CR30

CR31 CR32 CR33

IN

CIRCUIT STATIC FORWARD RESISTANCE

RESISTANCE {AEErox}

28

ohms

28

ohms

28

ohms

28

ohms

30

ohms

28

ohms

24

ohms

95

ohms

24

ohms

24

ohms

24

ohms

24

ohms

24

ohms

24

ohms

26

ohms

24

ohms

22

ohms

26

ohms

24

ohms

32

ohms

48

ohms

42

ohms

32

ohms

34

ohms

32

ohms

COMPONENT

Ql Q2 Q3 Q4 Q5 Q6 Q7 B-E Q8 Q9 QI0 Qll

MLI

110'ohms

38

ohms 34 34

110

28 28 28 28 24

ohms

(LED

on)

ML5

ML6

ML7

B-E B-C B-E B-C B-E B-C B-E B-C B-E B-C B-E B-C

B-C B-E B-C B-E B-C B-E B-C B-E B-C

1-2 4-6 5-6

B-E B-C

RESISTANCE {AEEroxl

24

ohms

22

ohms

30

ohms

30

ohms

32

ohms

32

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

30

ohms

60

ohms

48

ohms

48

ohms

40

ohms

25

ohms

70

ohms

25

ohms

38

ohms

25

ohms

ST

ATIC CIRCUIT RESISTANCE (See

CONNECTOR TERMINAL

J201J201J201J201-1

Note:

6 (+5 V) 7 (+12 V) 8 (-12 V)

(+42 V)

Take

resistance reading, reverse

Note)

REFERENCE

J201

- 9 {logic gnd)

J201

- 9 {logic gnd)

J201

- 9 {logic gnd)

J201

- 2

(power

meter

leads

POINT

and

gnd) 24

take

second

RESISTANCE (AQQrox}

HI

2K 400 8K

5K

ohms

ohms ohms ohms

38

32 70

LO

ohms ohms ohms ohms

resistance reading.

391,

6.

2-18

PRINTER

TROUBLESHOOTING

QUESTION

Does

test

1.

advance TEST 2 switch on)

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

Does carriage space

1a.

properly?

message

properly

key

is depressed?

on

logic

GUIDE

print

while

card

is

and

paper

PRINTER

(or

No.

operated

return

YES

Go

to

2.

--------

Go

to

lb.

NO

Go

to

1a.

-------

Check moving carriage manually power

Check spring tension.

Check ment.

Check motor

Check switch head.

Replace encoder

for

mechanical

off. for

proper

platen

end

continuity and

encoder.

No.1

motor or

and/or

cable.

---

bind

spacing

play adjust-

of

spacing

on

print

by

with

belt

~--------

Does

paper

lb.

~-

1c.

(Sucessive lines uniformly spaced)

-

--

Sprocket Do

sprocket

with

paper

advance

- -

Feed

and

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

1d.

Are

any

characters

--

-

pins

with

-------

properly?

--

on

platen paper

printed?

- -

line

up

guides?

r---------

Go

to

--

----------

Go

to

1----------

Go

to

1c.

1d.

1e.

Replace lead screw

----------

Check line feed Check

rotating power

Check ment.

Check line feed follower pulley pressure roller bail adjustment

With

platen

rotation

knob. Check

motor. Replace

for

platen

off. platen

stop

(friction feed).

power

detenting

by

continuity

motor

---------

Check adjustment.

Check guide

-

---------

Check head

left

adjustment.

continuity

and

belt

mechanical

manually with

end

bracket

on

(reset)

turning

or

and

right

and

right

cable.

nut.

tension.

bind

play adjust-

and

check

through

of

cable.

of

full

platen

line feed

sprocket

paper

print

by

MANUAL

391,

2-19

QUESTION

1e.

Are

any

dots

missing

characters?

from

printed

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

1f. Are

- - - - - - - -

19. Are

r----------------f------

1h.

any

on

characters

or

expanded

Is

proper (good paper)?

dots

print

ribbon,

noticeably

with

excessively compressed Check

horizontally?

density

proper

out

vertical

--

obtained

multi-copy

of

line

segments. guides

- -

--f-

YES

print

Check open

coil, guides, split armature

Check ture

adjustment.

Replace cable.

Examine

Replace

- - -

Check between

Replace lead screw

head

cracked

or

missing

sleeves.

print

head

print

head

print

head

for

cracks

print

head.

---

for

loose

encoder

for

excessive play

lead screw

or

--------

Go

to

1i.

NO

Go

to

Go

to

1f.

19.

1h.

for:

wire

arma-

or

wire

wear.

- - - - - - - - - -

and

nut.

Go

disc.

nut.

---

Check adjustment.

With moved ribbon without and carriage is

print

power

manually, moves

slipping

does

not

head

off

with

move

moved

- -

to

and

check

carriage

during

when

to

---

platen

carriage

that

return

the

right.

f----------------------

2.

Sprocket Does

'with

on

each

Did bell ring TEST.

1i.

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

2a.

Does bell ring

(CTRL

Sprocket

3.

Does

a

paper

Feed-

printed

edge

ALARM

copy

of

paper

side

of

page

during

under

G R.H. margin,

Feed

-

indicator

out

condition

align

properly

(prints

equally

perforation)?

PRINTER

any

conditions

etc)?

light

is sensed?

when

Undefined PRINTER

Go

to

Teleprinter

shooting.

Go

to

3.

r------

Go

to

Teleprinter

shooting.

Undefined

Go

to

Teleprinter

shooting.

-

------

problem

TEST.

trouble.

during

Trouble-

---

Trouble-

Check

bracket "one

-

-------

Check

adjustment.

Go

to

-

---,-----

Check tinuity.

Check plunger.

Check out

cable

Check adjustment.

carriage

ribbon

way"

rotation.

printed

2a.

bell coil

for

freedom

continuity

and

paper

and

left

rollers

line

position

and

of

contacts.

alarm

contact

for

---

cable

bell

paper

--

con-

391,2-20

7. LOGIC TROUBLESHOOTING

CARD

TROUBLESHOOTING

GUIDE

QUESTION

1.

2.

3.

opcon (function and

on)?

Are

characters

or

not

printed

printer

Does any

conditions?

lamps fail

performed,

improperly (from

line feed

Do

any

4. Does carriage space properly

5. Are characters performed

under

when

any

printed

received

board?

data

mode

data

and

messages

(local

be

received

in

the

data

CPS ok)?

copy

6.

7.

Are data

Can properly (local

to

power

formed

any

source)?

properly

and

return

conditions?

and

functions

from

properly

ok)?

and

printed

mode

light

applied

under

key-

sent

in

the

Go

to

14.

15.

4.

5.

6.

7.

8.

YES

Go

to

NO

2.

3.

15.

17.

18.

19.

20.

8.

9.

10.

11.

12,

13.

Does return

printer

and

line feed

automatically

received line?

Terminal

Does momentarily when

Carrier is

mode

(call

on

disconnect

network)? Does ALARM

cover

is

opened

cover is closed? Do

analog

function

and

properly?

Does ALARM paper

is

out?

Does

test

message

form

properly

TEST

indicator

stop

printing

key

is released?

when

at

end

Ready

turn

received

not

received

on

indicator

and

turn

digital

loop

indicator

print

and

while

the

is depressed

PRINTER

carriage

of

off

EOT

and

in

data

switched

light

when

off

when

modes

light

when

per-

PRINTER

and

TEST

Go

To

Go

to

9.

10.

11.

12.

13.

26.

Check

SPD4-SW5

Replace

Go

to

21.

Go

to

22.

Go

to

23.

Go

to

24.

Go

to

25.

MLC7.

and

SW6.

MANUAL

391,

2-21

QUESTION

Do

14.

15.

~---

15a.

all lamps fail

Are signals on

MLC7

present

print

- - - - - - - - - - -

data

bits

Are at

MLC7

present

inputs?

ro---------------

15b.

Is LDP pulse

present

ro----------------

15c.

16.

17.

Is RNC pulse Are line feed

4 signals MLC7

Are carriage 4 signals outputs?

outputs?

present

motor

present

motor

present

to

level

and

light?

and

correct

outputs?

Check circuit.

Check

Check circuits.

----------

and

correct

--

at

MLC7-14? Replace MLC7.

at

MLC4-18?

phase 1

correct

phase 1

correct

through

at

through

at

MLC7

Go

to

~--------

1----------

Replace MLC4. Check

phase drivers.

Check carriage phase drivers.

Check velocity

YES NO

power

clock

print

on

reset

circuit.

wire driver

Check outputs

incorrect) Check

Check Go

MLC4lamp

for SPD4-SW7

to

15a.

f----------

15b.

Go

to

15c.

----------

Go

to

15c.

--------

Replace MLC7.

line feed

motor

encoder.

Replace MLC7.

driver

(replace MLC4

.

open

circuits.

and

if

SW8.

--

Is

18.

19.

keyboard

MLC4-32? Is

correct

MLE3-2?

send

voltage levels

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

19a. Is

20.

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

20a.

21.

send

data

MLB5-13?

1

Is

correct

MLE3-2

Is receive

Is MLB5-11?

and

correct

present

voltage level

6?

data

present

voltage level

data

and

present

on

Replace MLC4.

Go

to

19a.

---------

correct

present

on

Check P301

Replace MLB5. Go

to

for

from

20a.

----------

on

MLB5-6? Replace MLC4.

Replace MLC7.

present

on

Check P301 Replace MLB5.

continuity

from

continuity

MLB5-12.

to

MLB5-10.

to

Check

Check JI07 Replace MLE3.

for

open

continuity

from

MLE3-1.

1-----------

Check Replace MLC4.

Check J107. Replace MLE3.

SPD4-SW3.

continuity

---------

Check P301 Replace MLB5.

Replace

continuity

from

MLB5-5.

MLC4.

circuit.

to

391,2-22

7. LOGIC CARD TROUBLESHOOTING

TROUBLESHOOTING GUIDE (Cont)

QUESTION YES

22. Is

23.

----

23a. Are voltages levels

24. Is

25.

correct

MLE3-10?

All voltage levels correct?

voltage level

on

MLB5-1

present

and

- - - - - - - - -

on

MLB5-2

8 correct?

correct

MLC4-28

correct

Is MLE3-4?

voltage level

and

22?

voltage level

present

on

9 Go

--

and

on

(Cont)

Replace MLC4.

to

23a.

1--------

Check cable circuit.

Replace MLC4.

for

open

Check MLE3-11

Replace MLB4. Replace MLC4.

--

r----------

Replace MLB5.

Check MLB4 pins 3 JIOI.

Replace MLB4. Check

Check MLE3

Replace MLE3.

NO

continuity

to

J107.

continuity

and 5 to

SPD4-SW2. continuity pin 3 to

JI07

from

---

from

26.

trouble

Is questions

present

I

through

but

not

defined

25? refer

by

Undefined

to

Circuit Descrip-

tions

and

trouble

Diagrams, etc.

-

Review initial indication trouble.

of

MANUAL

391,

2-23

410740

Note:

NOT PRESENT

ON

ISSUE

NOT PRESENT ON

ISSUE

IB

AND

410742

0.025

inch

"""-::::-;.~~

CIRCUIT

dot

CARD

diode

COMPONENT

represents

cathode.

LAYOUT

(8)

II)

CODceDDD

aODCODDD

(9)

lis)

JI05

NOT

PRESENT~

ON ISSUE

IB

JI06

.,

(I)

.,

~

-a:I)o

GJ

.;:::}-R14

.;:::}-RI3

-c::JoRI2

Q21

-cJ-R5I

R52

-<:::I-

-j[JCR27

CR26

PRESENT

ISSUE

IB

.,"

IILC4

ca:iP

-C::PCIO

~

ON

ONLY

COMPONENT

c

CRI-CR27

Cathode

A

Anode

MLA8 MLB4 MLB5 MLEI MLE3

1 0

2

3

4

5

6

7

(Top

14 13

12

11

10

9

8

View)

POSITIONS

REVERSED

IDENTIFICATION

QI-Q5

Q7-Q20

MLD2 MLE6 MLE7 MLE8

1 0

2

3

4

5

6

7

8

(Top

16 15 14

13

12

11

10

9

View)

AND

ON ISSUE

LEAD

DESIGNATION

B = Base E =

Q6

IB

(1)

(20)

Emitter

(40)

D

C =

Collector

MLC4 MLC7

Q21

Collector

BMe~

Emitter

391,2-24

7. LOGIC

TEST

POINTS

CARD

AND

TROUBLESHOOTING

VOLTAGE READINGS

Note: Use Volt-Ohm-Milliammeter

approximate

Q1-B

Q1-C

Q2-B

Q2-C

Q3-B

Q3-C

Q4-B

Q4-C

Q5-B

and

may

be

Idle = -4 V Repeat

Idle = Repeat

Idle Repeat

Idle = Repeat

Idle Repeat

Idle = +42 Repeat

Idle Repeat

Idle = Repeat

Idle = +43

Repeat

higher

or

lower

B = Base

line feed = -2.5 V

+42

V

line feed =

= -4 V

line feed = -2.5 V

+70

V

line feed = +37 V

= -4 V

line feed = -2.5 V

V

line feed = +37 V

= -3.5 V

line feed = -2.5 V

+42

V

line feed = +37 V

V

line feed = +51 V

(Cont)

dc

Volts Scale (use ac Volts Scale

than

those

E

=

Emitter

specified,

depending

C =

®Q10-B*

@Q10-C*

+37

V

Q11

thru

Q11

thru

Q20-B

Q20-C

MLA8-7 MLA8-8

for

on

Collector

Q19-B

Q19-C

MLA8-9). Voltage readings are

meter

used.

Even

column

Odd

column = -4

Even

column = +53

Odd

column = +45

Idle

= -4 V

Repeat

= -1.75 V

character

V

printing

=

-3.7 V Idle = +42

Repeat

V

character

printing

=

+40V Idle

= 0 V

Repeat Idle = +42

Repeat Repeat Manually

motor alternate

bell =

V

bell =

space =

rotate

shaft.

between

+0.5

+30

+2.4

carriage

Motor

V

should

+4.8 V and

-4.8 V.

Q5-E

Q6-B

<V

Q7-B*

@Q7-C*

@Q8-B*

@)Q8-C*

(1)

Q9-B*

@Q9-C*

Idle =

+43

V

Repeat

line feed = +51 V

Idle = +0.75

Repeat

Idle

Repeat

Idle =

Repeat

Carriage Odd

Even Odd

Even Idle

Repeat Idle =

Repeat Carriage

line feed = -3.5 V

= -3.75 V

space = -2 V

+49

V

space =

returning

column

column = -4

Column = +53

column = +45

= -3.75 V

space =

+49

V

space = +

returning

V

+50

V

= + 3 7 V

= -1.75 V

V

-2

V

50

V

= +

37

V

MLB5-6

MLB5-12

MLB5-13

MLC4-32

MLC7-15

MLD2-6 MLE1-2 MLEl-6

and

Idle (Data space = +3 V (Data null = +0.5

(Data (Data space = +1.5 V

(Data (Data space = +3 V

Idle = +4.8 Repeat

Idle = +4.8

Repeat +7.5 +7.5

7

+6 V

= 0 V

Mode) Receive Mode) Receive

V

Mode) Idle = Mode)

Send

Mode) Idle = 0 V Mode)

Send

V

space = +3.5 V

V

character

printing V V

repeat repeat

+4.2

repeat

V

MLEl-9 MLEl-13 MLEl-14

MLE6-2*

®

<D

MLE6-3*

® MLE6-4*

+2.75

+9.5

V

+6.5

V

Odd

column

Even

column = -4

Odd

column

Even

column = -3

= -3.75 V

Idle Repeat

V

space =

= -1.75 V

V

=

+O.B

V

-2

V

MLE7-3

@MLE7-4*

CDMLE7-5*

@MLE7-6*

@MLE7-7*

MANUAL

=

-3

Idle Repeat

Even Odd

V

line feed = -1.25 V

column

Idle = -3.75 V Repeat

Idle = -3

Repeat

space = -2 V

V

space =

391,

= -1.75 V

= -4 V

=

+O.B

= -3 V

-2

V

2-25

V

@MLE6-5*

MLE6-6

MLE6-7

MLE6-9

MLE6-10

MLE7-2

*v

oltage readings

Readings

shown

at<D,®,@,

Idle = -3 Repeat

Idle Repeat

V

space =

=

+0.75

line feed = -3.5 V

= +5 V

line feed = -3.5 V

= -3 V

line feed = -1.25 V

Idle = -4 V Repeat

Idle Repeat

line feed = -2.5 V

= -4 V

line feed = -2.5 V

are typical.

@(phase 1 and

V

-2

V

3)

may

appear

MLE7-14

Idle Repeat

MLE7-15

Idle Repeat

MLEB-4 Idle = -3.5 V

Repeat

MLEB-5 Idle = -2.1 V

Repeat

MLEB-6

Idle Repeat

MLEB-7

Idle Repeat

on@

,@,®,(D(phase 2 and

= -3 V

printing

= -4 V

printing

= -2.75 V

= -3.7 V

line feed = -2.5 V

line feed = -1.25 V

= -4 V

line

feed

= -2.5 V

= -3 V

line feed = -1.25 V

4)

respectively.

391,2-26

7. LOGIC CARD TROUBLESHOOTING (Cont) SEMICONDUCTOR IN-CIRCUIT STATIC

FORWARD RESISTANCE

COMPONENTS

CR1-CR27

CR28,

CR29

Q1-Q5, Q7-Q20

Q6

Q21

STATIC CIRCUIT RESISTANCE (See Note)

CONNECTOR TERMINAL

P201-6 (+5 V)

(+12 (-12

V)

meter

Note:

P201-7 P201-8 P201-1 (+42

Take

resistance reading, reverse

RESISTANCE

B-E B-C B-E B-C B-E B-C

REFERENCE

POINT

P201-9 (logic gnd) P201-9 (logic gnd) P201-9 (logic gnd) P201-2

leads

(power

and

take

(Approx)

30

ohms 20 ohms 70 ohms 30

ohms

35

ohms 35 ohms 30

ohms 30

ohms

RESISTANCE

LO HI

24

ohms

Infinity

95

ohms

55

gnd)

ohms

second resistance reading.

(Approx)

1100hms

Infinity

600

ohms

8K

ohms

B.

KSR OPERATOR CONSOLE TROUBLESHOOTING

MANUAL

391,

2-27

TROUBLESHOOTING

QUESTION

Does failure involve

1.

operational indicator?

power

With

2. communications LOCAL (LOCAL TALK), DATA, TERM

Is ALARM indicator lit.

3. installed, cover closed)?

Do

4.

5.

any conditions, ie, depressing keyswitch, ALARM paperon

by

key? Do each

mode

tions light when its keyswitch is depressed?

control

applied are

READY (AUTO ANSW) lit?

indicators light

out,

LOCAL (LOCAL TALK)

depressing

of

the

keyswitch indicators

GUIDE

either

an

or a station

any

of

the

mode

indicators;

(paper

under

indicator

PRINTER

three

communica- Go

any

indicator

on

TEST

Go

to

YES

2.

5.

20.

6.

9.

Go

to

NO

12.

3.

4.

lB.

6.

6. Does

LOCAL (LOCAL-TALK) indi-

cator

light when its keyswitch is

depressed?

1---------

LOCAL (LOCAL-TALK) indi-

6a.

r---------

Does cator

light

when

PRINTER

key

is

depressed?

7.

Does DATA when

its keys witch is depressed?

indicator

--------

7a.

Does DATA any conditions, ie, loop-back, automatically (AUTO ANSW)

Does TERM READY (AUTO ANSW)

B.

indicator is

depressed following depression

LOCAL (LOCAL-TALK) keyswitch?

indicator

from

TERM READY

mode?

light when its keyswitch

1------------------

Ba.

Does TERM READY (AUTO ANSW) indicator set ditions)?

9. Does INTRPT keys witch is depressed while in loop-back

light when

is first

INTRPT

turned

indicator

mode?

power

on

-

--

light

(no

alarm con-

flash when

----

TEST

or

flash

under

to

the

of

Go

---

---------

Go

---------

Go

-----------

Go

to

7.

20.

B.

20.

9.

20.

10.

Go

to

6a.

1---------

Go

to

1Ba.

to

Go

7a.

r----------

Go

to

1Ba.

Go

to

Ba.

--------

Go

to

1Ba.

Go

to

9a.

391,

8.

2-28

KSR

OPERATOR

CONSOLE

TROUBLESHOOTING

(Cont)

TROUBLESHOOTING

QUESTION

9a.

10.

1------

1I.

12.

13.

Does remote interrupt?

Does ALARM

the

released

lOa.

Does

a

Do

DUPLEX

properly

Do

Are

only

Do

14. to function depressed up)?

INTRPT

station

INTERLOCK

up

indicator

(cover

--

ALARM

paper-out

PRINTER

any

REPT

any

upper

condition

TEST,

and

CPS keyswitch

under

keys generate characters?

characters

key

characters

case,

or

when

(CAPS LOCK

GUIDE

sends

indicator

keyswitch is

open)?

- - -

indicator

all

conditions?

is

depressed?

repeat,

become a control

only

(Cont)

light

an

on-line

light

--

light

exists?

PARITY,

generated

shift

that

key

when

---

when

operate

when

is

released

YES

Go

to

20.

Go

to

1I.

1---------

Go

to

20.

Go

to

12.

Go

to

13.

Go

to

27.

Go

to

28.

Go

1---

Go

Go Go

Go

to

to to

to

-----

NO

18a.

lOa.

- -

18a.

20.

21a.

14.

15.

Are

any generated keyswitch ping other

16.

Do

all (Shift, Case)?

----------

16a. Are

17.

proper

for

each Does

within Amp

See

Part

Console Circuit Diagram.

erroneous

when

is

not

on

keyboard

keyswitch)?

data

keys generate characters

Control,

characters

key?

more

than

only

one

groups fail?

4,

KSR

characters

the

corresponding

depressed (ie, tap-

or

depressing

Upper

and

Lower

-------

generated

one keyswitch of

the

Sense

Operator

any

Go

to

28a.

Go

to

16a.

---

Review original failure symptom.

Go

-------

to

25.

Go

to

16.

Go

to

17.

----------

(1) Check (2) Replace keyswitch logic.

Go

to

24.

for

proper

key

top.

MANUAL

391,

2-29

QUESTION

IS.

Is

-12 V present

card

cable

conector

keyswitches

light

------------_.

Is

ISa.

--

ISb.

19.

-12 V present

switch

in

question

--------

Is

-10 V or

keyswitch

Is +5 V cable question?

present

connection

+5 V

in

question?

on

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

19a. Is + 5 V

connector

20. Does keyswitch in the (depress click,

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

20a. Is

TEST, or

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

20b.

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

20c. Is 0 V

Is +5 V when position)?

in closed (depressed

on

the

mechanical

and

etc)?

keyswitch

PARITY,

CPS?

present

keyswitch

present

question

corresponding

at

requirements

release

in

question:

on

when

on

pin 2 of PI07

go

to

Step

on

pin 4 of

?

-

---

present

circuit

of

keyswitch

P107?

question

properly,

Interlock,

pin 1 of

is

open

pin 1 of keyswitch

down

position)?

circuit

(if

any ISa)?

key-

-

on

pin 3 of

card

in

meet

latch

PRINTER

DUPLEX

keyswitch

(released

keyswitch

is

---

up

YES

Go

to

lSa.

1----------

Go

to

lSb.

---------

Replace defective key-

switch.

Check circuit keyswitch

---------

Check cable.

Go

---------

Go

----------

Go

for

broken

land

in

for

open

to

20a.

to

20b.

to

20c.

---------

to

29.

or

to

pin 3 of

question.

circuit

open

in

NO

Check cable.

for

open

circuit

in

--------

Check circuit solder board.

----------

If

to Go

1---

Replace defective keyswitch.

----------

Go

for

broken

land

connection

voltage is

19. to

19a.

- - - - - - - -

to

21.

or

defective

-12

V dc, go

or

on

open

circuit

---------

Check cable

-------

Check PI07

pin Check at

pins

Replace keyswitch.

for

open

4.

for

open

of

keyswitch.

open

circuit.

---

circuit connection

to

any

Are

21. several

~-

- - - - - -

Are supply voltages

21a.

circuit

characters

"data"

card

cable

printed

keys

are

--

present

connection?

depressed?

--

1'-----------------

21b.

Is

-S V present

of

CRl?

---------

21c. Is

-12 V present

of

CRl?

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

21d.

Are supply voltages integrated

22.

01L

Are and

correct

02

clocks

MLAl,

and

MLA6

on

circuit

02L

at

MLA5

present

and

the

--------

on

the

preset

packs?

clocks

and

MLB4?

cathode

anode

present

correct

when

- -

on

at

01

and

all

at

Go·to

--

--------

Go

-----_.----

Go

-,---------

Replace

r----------

Check

circuit

Go

24.

--

to

21b.

to

21d.

CRI.

for

open

circuit

board.

to

24. Go

on

Go

to

21a.

-----------

Check

-------

Go

to

cable

21c.

-----------

Check circuit

f--------

Go

to

for

open

board.

22.

23.

for

open

circuit

circuit.

--

on

---

391,

2-30

8. KSR OPERATOR CONSOLE TROUBLESHOOTING (Cont)

TROUBLESHOOTING GUIDE (Cont)

QUESTION

23.

24.

25.

26.

560

Is MLB3?

Is depression pulse present Amp depressed?

Is depression pulse present

keyswitch logic 11 keys

With in question depressed, data

KHz clock present

input

with

or

12

with key

in

question depressed.

REPT key and keyswitch Check cable P107-6

on

MLA5-2 present? Check

on

pin 1

of

on

Sense Go

keyswitch in question

on

input

MLA5-10,

or

one

of

the

is

serial

YES

Check clock generation

and

driver circuitry.

to

25.

Go

to

26.

for continuity.

CR2

and

CR4.

NO

Check cable circuit.

Check visually between terminals switch.

If

there remove and check signal again input

If

a depression signal present, replace defective sense amp.

If

a depression signal present, replace defective keyswitch.

Replace defective sense amp.

Replace MLA5.

for

is

no

the

keys witch

to

sense amp.

open

for a short

of

short

visible,

is

the

at

not

key-

Does keyswitch in question

27. mechanical requirements (depress release properly, latch, click, etc)?

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

Is depresssion pulse present

27a.

switch logic no

keys depressed?

--------

Is depression pulse present

27b.

Amp - logic inputs with depressed? depression pulse does

Does keyswitch in question;

28. left or

CTRL requirements (depress properly, latch, click, etc)?

and

MLA5-10,

---------

right SHIFT, CAPS LOCK

meet

the

------------'-

28a. With

'---

- - - - - - - - - -

jumper

of

pin 2 its associated sense amp failure corrected?

strap

keyswitch in question

meet

on

11

or

on

no

mechanical

and

release

connected

input,

__

the

and

Go

to

1---------

Go

key-

12

with

Sense Check for

keys

REPT

---

from

to is

- - - -1..--

to

~--------

tion

to

not

appear keyswitch, pin Check connections of

keyswitch.

Replace keyswitch. Go

to

~---------.

Check for joint from sense switch.

Replace keyswitch.

27a.

27b.

open

connect-

key switch , ie,

at

associated

1.

for

cold solder

at

terminals

28a.

cold

solder

or

broken

amp

land

to

_______

key-

Replace defective keyswitch.

----------

Replace MLA5.

----------

Replace defective sense amp.

Replace defective keyswitch.

1------------

Go

to

28b.

...._---------

MANUAL

QUESTION YES NO

391,

2-31

Is depression pulse present

28b.

keyswitch logic inputs

or

12

with

present

29.

11 Is trouble

MLA5-10, amp.

no

keys depressed?

but

not

on

defined?

Replace defective sense

Undefined

to

refer tions

Circuit Descrip-

and

trouble

Diagrams, etc.

-

Replace MLA5.

Review initial indication of

trouble.

391,2-32

8. KSR 410080

OPERATOR

CIRCUIT CARD COMPONENT LAYOUT

o

[::.::~::]~.,!

DLILJD

CONSOLE TROUBLESHOOTING (Cont)

I ,

i

~

,

..

mOLD

c@&

~

!

J J

o OITJUJDI J

,.,

,.,DDOCTIODD D D

C~-~G:J~'

G:J

€r

D:::::":::J

D

~

",[j

DDDD

c@}>

i

-€E}

-@}-

~

[:::::.::]

",,,'"

i

,:~

[:~::.:::]

<+>Ou

",ITI]

...I

.J

~

...10

410080[:::J

D D

-@}-

0

Not

present

COMPONENT IDENTIFICATION AND LEAD DESIGNATION

SEMICONDUCTOR

STATIC CIRCUIT RESISTANCE (See

on

Issue

1A.

C

A

CONNECTOR TERMINAL

P107-3 P107 P107-8

CR1·eR9

Cathode

Anode

IN

CIRCUIT STATIC FORWARD RESISTANCE

COMPONENT RESISTANCE (Approx)

CR1-CR9

(+12 V)

-2

(-12 V) (+5 V)

MLA4 MLB1 MLB2 MLB3

Note)

REFERENCE

14

13 3 4 5

6

7

-4

P107 P107-4 (logic gnd) PI07-4

12 11 10

9

8

30

ohms

POINT

(logic gnd) (logic gnd)

MLA1 MLA5

MLA6 MLB4

RESISTANCE

1.5K

1 • 2 3 4 5 6 7

8

9

10

11

12 13 14

LO HI

30

ohms ohms

28

ohms

28 27 .

26

25 24 23 22 21 20 19 18 17 16 15

(Approx)

Infinity Infinity 150

ohms

Note: Take resistance reading, reverse

meter

leads and

take

second resistance reading.

SENSE

AMPS

UNSHIFT

SHIFT

CONTROL

Sense

Data

B8B7B6B5B4B3B2B1

BO

B8B7B6B5B4

B3B2B1

BO

B8B7B6B5B4B3B2B1

BO

Positive

Logic

Amp

Enable

Switch

Address

Character

Mark

-

1

No.

,

Space

-

0

11

1 1 0

NON-SEND

Shift

(RH)

NON-SEND

Shift

(RH)

NON-SEND

Shift

(RR)

11 2

1

NON-SEND

CTRL

NON-SEND

CTRL

NON-SEND

CTRL

Hexadecimal

Code

11 3

1

2

NON-SEND

Shift

(LR)

NON-SEND

Shift

(LR)

NON-SEND

Shift

(LR)

Shown

where

No

10

1

2

3

1 0 o 1 0 1 1 1 1

/

0001111

1 1

?

1 1

1 1 1 1 1 1 1

Character

is

Ass

igned.

10 2

2

4

1 0

1 1 0 1 0

1 1

k

0010010

1 1 K

1 0

0001011

VT

10

3

2

5

1011100

1 1

s

001010011

S

100010011

DC3

9 1

3

6

000101110

100111110

>

111111111

9

2

3

7

101110101

u

001010101

U

100010101

NAK

9

3

8 1 0 0 1

1

o 0 1 0

2

101000000

@

110010001

(91)

8

1

4

9 o 0 0

1 o 0 1 1 1

,

000100010

"

111111111

8

2

4

10

o 0 0

1 1 0 1 0 1

5

100100101

%

110010100

(94)

8

3

4

11

1 0 1

1 1 1 0 1 0 z

001011010

z

100011010

SUB

7

1

5 12

1 0 0 1

1 1 0 1 1

;

000111010

:

111111111

7

2

5

13

o 0 1 1

1 0 0 1 0

r

101010010

R

000010010

DC2

7

3

5

14

001110001

q

101010001

Q

000010001

DC1

6

1

6

15

100101100

.

000111100

<

111111111

6

2

6

16

o 0 1

100110

f

101000110

F

000000110

ACK

6 3

6

17

101100001

a o 0 1

00

0 0 0 1

A

100000001

SOR

5 1

7

18

100001000

Back

Space

100001000

Back

Space

010011100

(9C)

5

2

7

19

100100000

Space

100100000

Space

100100000

Space

5 3 7

20

001110111

w

101010111

W

000010111

ETB

3 1

8

21

001101100

l

101001100

L

000001100

FF

3 2

8

22

101110110

v

001010110

V

100010110

SYN

3

8

23

100110001

1

000100001

!

010010000

(90)

2

1

9

24

o 0 1 1 o 1 1 1 1

o

(alpha)

1 0

1001111

0

(alpha)

000001111

SI

2 2 9 25

o 0 1

100011

c

1 0

1000011

C

000000011

ETX

2 3

9

26

o 0 1

111000

x

1 0

1011000

X

000011000

CAN

28

1

10

27

o 0 0

101101

-

o 0

1011111

010011010

(9A)

28

2

10

28

101100010

b

001000010

ii

100000010

STX

28

3

10

29

110000000

LO

(Local/Talk)

110000000

10

110000000

LO

27

1 11

30

000110000

o

(zero)

100101001

)

010011001

(99)

27

2

11

31

101100111

g

001000111

G

100000111

BEL

27 3

11

32

010000001

11

(Data)

010000001

L1

010000001

11

26 1

12

33

101110000

p

001010000

P

100010000

DLE

26

2

12

34

001110100

t

101010100

T

000010100

DC4

26

3

12

35

010000010

L2

(Auto

Ans)

010000010

L2

010000010

L2

24

1

13

36

000101011

+

101011101

]

110011011

(9B)

24

2

13

37

000110110

6

101011110

""

010010101

(95)

24

3

13

38

000011011

ESC

000011011

ESC

110001111

(8F)

23

1

14

39

100111101

=

101011011

[

111111111

~

?'

~

CO

~

I-'

~

r:n

&

a::

~

1-4

0

~

SENSE

AMPS

UNSHIFT

SHIFT

CONTROL

Sense

Data

BSB7

B

6

B5

B

4

B3B2B1

BO

BSB7

B6B

5B4

B3B2B1

BO

BSB7B6B5Bi.B3B2B1

BO

Positive

Logic

Amp

Enable

Switch

Address

Character

Mark

-

1

No. No.

No.

Space

-

0

23

2

14

40

101101110

n

001001110

N

100001110

SO

23

3 14

41

010000100

Spare

010000100

Spare

010000100

Spare

Hexadecimal

Code

20

1

15

42

100001101

RET

100001101

RET

1 1 1 1 1

O·

1 1 1

(F7)

Shown

where

No

20

2

15

43

101101000

h

001001000

H

100001000

BS

Character

isAssigned.

20

3

15

44

110000011

L3 (

Intrpt)

110000011

L3

110000011

L3

19

1

16

45

001111011

{

001111101

}

100011111

US

19

2

16

46

101111001

y

001011001

y

100011001

EM

19

3

16

47

000110011

3

100100011

IF

110010010

(92)

17

1

17

4S

001011100

"-

101111100

I

000011101

GS

,

17

2

17

49

100110111

7

100100110

&

010010110

(96)

17

3

17

50

001100101

e

101000101

E

000000101

ENQ

16

1

IS

51

101111111

Delete

101111111

Delete

000000000

NUL

16

2

IS

52

101101101

m

001001101

M

100011100

FS

16

3

IS

53

101100100

d

001000100

D

100000100

Ear

15

1 19

54

000001010

Line

Feed

000001010

Line

Feed

000001010

Line

Feed

~

"'d

t:r.:I

t:j

~

n

>

0

~

t:j

0

t:r.:I

~

r:n

n

-

0

t:r.:I

Z

~

(j

r:n

......

0

s:::

t""

0..

1-'-

t:r.:I

::s

~

r:n

~

rl-

0

~

C

~

t:J:j

t""

0..

t:r.:I

15

2

19

55

001101010

j

101001010

J

000011110

RS

15

3

19

56

100110100

4

000100100

$

010010011

(93)

14

1

20

57

100111000

S

100101010

*

110010111

(97)

14

2

20

5S

000111001

9

000101000

(

110011000

(9S)

14

3

20

59

001101001

i

101001001

I

000001001

HI

13

1

21

60

001100000

,

001111110

-

110011101

(9D)

13

2

21

61

NON-SEND

REPl'

NON-SEND

REPl'

NON-SEND

REPl'

13

3

21

62

NON-SEND

CAPS

LOCK

NON-SEND

CAPS

LOCK

NON-SEND

CAPS

LOCK

r:n

rl-

::t:

0

"C

0

--

-.

~

n

1-4

0 Z

::s

0

rl-

--

-

n

0

::s

rl-

--

9.

RO

OPERATOR

TROUBLESHOOTING GUIDE

CONSOLE TROUBLESHOOTING

MANUAL

391,

2-35

QUESTION

Do

any

1.

2.

3.

4.

5.

6.

r---

6a.

Is the depressed?

Does turn the (cover closed

Does off turn depressed (cover closed installed) ?

Does ALARM cover is

Is of

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

Is +5 connection

indicators fail

the

test

message

PRINTER

the

on

and

PRINTER

the

(if

on)

on

when

opened?

-10 V or keyswitch in question?

V

present

TEST key is

TERM READY 'indicator

ALARM

TEST

and

ALARM indicator

and

TERM READY

the

indicator

+5 V present

on

of

keyswitch in question?

1------------------

6b. Is +5 V

connector

present

on

at

to

light?

printed

paper

RESET key is

while

turn

off

when

key is released

installed)?

turn

and

paper

light when

on

- -

circuit card cable

the

corresponding

P107?

3

--

YES

Go

to

6.

Go

to

3.

Go

to

4.

Go

to

5.

Go

to

12.

Replace defective key-

switch.

1-----------

for

Check

circuit

keyswitch

~---------

Check cable.

land

for

broken

in

open

or

to

pin 3 of

question.

circuit

open

in

NO

Go

to

2.

Go

to

7.

Go

to

8.

Go

to

9.

Go

to

1I.

If

voltage is

go

to

6a.

-12

V dc

---------

Go

to

6b.

~----------

Replace defective keyswitch.

7. Does switch toggle keyswitch is depressed?

Is negative pulse

8. when released?

9.

Does voltage +5 V

depressed

+5 V

10.

With MLB4-10

pin 1 of

PRINTER

to when

no

PRINTER

from

+ 5 V

present TEST key is

on

MLA3-3 toggle

0 V when RESET key is

and

toggle from 0 V

RESET key is released?

keyswitch depressed, is

and

12

at

+5 V?

1----.;..----------

lOa. Is 0 V

5, 6, 7,

r-----------------

With MLA3-11

lOb.

GND, are clock pulses MLB2-5?

Note:

'----

present

Printer and

8 are

-----

and

15?

may

connected

on

MLB4-1, 2, 3,

and 8 connected

line feed when MLA3-11

---------

TEST

to

0 V when

on

MLA3-3

-

present

to

GND.

key-

from

to

---.

4,

to

on

Check cable cuit.

Go

to

Go

to

Go

to

for

10.

lOb.

f----------

Replace MLB4.

1-----

Go

to

-----------

------

10c.

open

cir-

Replace defective keyswitch.

Check circuitry.

Go

to

lOa.

START

-----------

Go

to

lOb.

1------------

Check CLOCK circuitry.

----------_.

CONTROL

DIVIDER

391,

2-36

9.

RO OPERATOR CONSOLE TROUBLESHOOTING (Cont)

TROUBLESHOOTING GUIDE (Cont)

QUESTION

With MLA3-11 and 8 connected

10c.

to

GND, are MLB2 and MLB3

counting in binary?

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

10d.

With MLA3-11 and 8 connected

at

GND, are waveforms

10

and

present

and correct?

MLB4-12

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

10e. With MLA3-11 and 8 connected

to

GND are pulses present

MLA2-8?

1I.

12.

Note: Remove GND from MLA3-i1

Is 0 V SWITCH, pin 1 when INTERLOCK circuit. SWITCH is closed (depressed)?

Is by

present

trouble

question 1 through 11?

on INTERLOCK

present

but

not

on

defined

Go

---------

to

and 8 after

Go

~---------

Check START LATCH Replace MLB4.

Check

Undefined trouble refer tion

YES

to

10d.

to

10e.

cable

for

open

to

Circuit Descrip-

and Diagrams, etc.

correcting

trouble

NO

Check ADDRESS COUNTER.

-----------

Replace MLB4.

----------

Replace MLA2.

Replace defective keyswitch.

Review initial indication of

trouble.

(if strapped in Step lOb).

MANUAL

391,

2-37

410741

CIRCUIT CARD COMPONENT LAYOUT

©DDDDD

1

~

~~®

0

~~~

~

0~

~0

2

3

• 4

®

~~

~0

~

0~

~

i

---

aJ

0

~

11

I

$~

I

I I I

I

:

PARITYI1

SPEED

I J

I 10

I

ON

-

5

OFF

c::::x:::::J

SPB5

I

I I

I

:

'

CPS

301

I

410741

I

20 A

D©

ILS

B

r---,

I

L...

___

I

..J

COMPONENT IDENTIFICATION AND LEAD DESIGNATION

MLA2 MLA1 MLA3

MLA4 MLB2

STATIC CIRCUIT RESISTANCE (See

CONNECTOR TERMINAL

P107-8 P107-2

(+5 V) (-12

V)

14 13

12 11 10 9 8

Note)

REFERENCE

P107-4 P107-4 (logic gnd)

MLB1 MLB3

MLB4

POINT

(logic gnd)

I

0

1 2 3 4

5

6 7 8 9

RESISTANCE

22

Infinity

16

15 14 13

12 11 10

LO

ohms

(Approx)

HI

80

ohms

Infinity

Note: Take resistance reading, reverse

meter

leads

and

take

second resistance reading.

391,2-38

9. RO TEST

OPERATOR

CONSOLE TROUBLESHOOTING (Cont)

POINTS AND VOLTAGE READINGS

Note: Use Volt-Ohm-Milliammeter

or

lower

than

those

specified, depending MLA1-7 MLA1-9

MLA2-11

Depress Reset Switch. Meter will momentarily deflect from +4 V Depress

to Depress

to

and

+3.9 V as switch

and

+0.1 V as switch is released.

Depress Reset Switch = +4 V

MLA3-3

Release Depress

to

Reset

and

+3.9 V.

Depress Reset Switch = 0 V Release Reset Switch = +4 V

MLA3-6

Depress Release

Reset

dc

Volts Scale. Voltage readings are

on

meter

used.

release

Printer is

released.

Printer

Test

Switch. Meter will momentarily deflect from +4 V

Test

Switch. Meter will momentarily deflect

Switch = 0 V

release

Printer

Test

Switch. Meter will

Switch = +4 V

Switch = 0 V

approximate

momentarily

and

may

to

+3.9

deflect

be higher

V.

from

0 V

from

+4 V

MLA3-8

MLA4-1

Depress Release

= +7.5 V

Reset

Switch = 0 V

Reset

Switch = +4 V

MLA4-12 = +3.5 V MLB1-6 Depress

Reset

Switch = +4 V

Release Reset Switch = 0 V

MLB1-14 Depress Reset Switch = 0 V

Release Reset Switch = +4 V

MLB4-2,

3, 6 and

7 Depress Reset Switch = +4 V

Release Reset Switch = 0 V

MLB4-12 Depress Reset Switch = 0 V

Release

Reset

Switch = +3.5 V

PAR

T 3 - DISASSEMBLY jREASSEMBL Y

MANUAL

391,

3-1

CONTENTS

GENERAL

1. TOOLS

2. DISASSEMBL Y jREASSEMBL Y

3. KSR

AND

Terminal Auxiliary

A.

(TAU) Power

B.

Power

C.

Operator

D.

Logic

E.

Logic

F.

Printer

G.

Print

H.

DISASSEMBL Y jREASSEMBL Y

4. OF

MAJOR PRINTER A.

Print

B.

Spacing

C.

Line

D. E. Platen F. Lead Screw G.

Carriage With

H. Lead Screw

Collar With

I.

J.

Paper Paper Guides

K.

Signal

L.

OPERATOR

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

REQUIRED

RO

TELEPRINTER

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

Supply Supply Fuse

Console Card Fuse Card

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

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

Head

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

COMPONENTS

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

Head

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

Motor Motor

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

Feed

Motor

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

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

Post

Nut

Link

Tray

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

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

Bell.

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

CONSOLE

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

Belt

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

Unit

..........

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

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

.......

..........

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

Assembly

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

..........

....

.....

...

PAGE

1 2 3

3

3 5 5 6 7 8 9

12

15 15

15 18 19

20

21 22 23 23 24 24 26 27

27

POWER SUPPLY A.

Circuit Card. . . . . . . . . . . . . . . .

B.

Circuit Card Assembly Notes. . .

ENCLOSURES AND HANDLING.

1.

GENERAL

1.01

This

part

sembly

Teleprinter

1.02 ponents

Unit nents

Caution:

performing

1.03 force

removal. how

each removal so plished. cedure

and

The

procedures

break

the

and

sUbcomponents.

Codes illustrate

and

parts.

Remove

any

When removing a part

from

parts

to

provide

Follow

part

that

For

reassembly, reverse

except

given.

1.04 etc,

Reference in

right

refer

to

the

and

ating position.

CONTENTS PAGE

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

36 36

37

PAPER

. . . . . . . . . .

provides disassembly

procedures

their

major

terminal

the

arrangements

all

power

component

the

terminal,

the

removal

is

removed

proper

where

reassembly

different

the

up

or

down

KSR

terminal

..

. . . . . .

and

for

the

43

KSR

and

components.

provided

down

replacement.

major

into

Part

from

component

do

in

major

6,

the

not

this

Parts

of

compo-

set

before

pry

necessary clearance

procedure

and

the

and

sequence

can

be

accom-

removal

instructions

procedures

and

in

top

its

to

left

or

bottom,

normal

37

reas-

RO

part

com-

and

or or

for

note

of

its

pro-

are

and

oper-

Spacebar Mechanism

A.

Keys

B. C. D. E. F. G. H. I.

J.

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

Key Spacer Keyswitches Cable (KSR) Cable

(RO)

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

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

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

Channel (KSR) Channel Circuit Card Keyboard

(RO)

Components

Layout

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

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

...........

.........

.....

27 28 29 29 29 30 31 33

34 35

1.05 number

1.06 and

1.07 charge.

When

tI otherwise specified,

with

ordering

the

Containers

from

maintenance

reused

when

The

MOS circuitry

Console

The

346392

transporting

can

letters

and

packing

be

static

replaceable

prefix

"TP"

(ie,

materials

spares

should

components.

in

the

damaged

discharge

parts,

each

TP430047).

retained

be

KSR

Operator

by

static

ground

unless

part

saved

dis-

strap

391, 3-2

is available nance should nents

1.08

spares are provided

be

for

repair.

Disassembly print

set

housing

1.09

Disassembly

require

1.10

Disassembly carnage

nut

and

collar with

of

the

operator

1.11

After

lubrication

lubricate

1.12

any

Disassembly for

dling

parts

Bustle Cover Bustle Cover Deflector

Paper Holder

Paper Holder Set

Cover

Rear

Frame

for

service personnel. Some mainte-

in

antistatic

saved

for

reuse

when

returning

of

printer

head,

will

require

and

rear

frame.

of

the

removal

of

. . '

WIth

console,

replacing

the

post

link

will require

if

printer

procedures

parts

requiring lubrication.

and

additional

is provided in

Part

enclosures

the

(Sprocket (Friction

(Sprocket

Feed)

Feed) (Sprocket (Friction

parts,

the

printer

of

printer

assembly, lead screw

present.

parts,

in

reassembly

following paragraphs:

Feed)

bags which

compo-

except

removal

motors

the

logic card.

of

the the

will

lead screw

the

removal

refer

to

the

Part 8 or 9 and

information

and

paper

han-

Paragraph

3.01

3.04

3.05

2. TOOLS

2.01

REQUIRED

The

following

performing

tools

the

printer reassembly procedures. Most normally

be

present

in

standard

kits.

Part

No.

75765 94646 95368

Hook, Stick, Screwdriver,

Pull Spring

Orangewood

Blade

96364

100704

Gauge, Screwdriver wlClip,

Blade

100982 108285

110271 124682 125752 129534

135676 135677 135678 142554 142555 151392 152835

346257 346260 346392

Customer

Soldering Desoldering

Provided Tools

Iron

Screwdriver wlClip, 6

Inch Pliers, Long-Nose Wrench, Hex Key Wrench,Hex Key Wrench, Wrench,

and

1/4

Handle Bit,

1/4

Bit,

5/16

Hook, Hook,

Push Spring Tweezers Wrench, and

3/8

Extractor Extractor, Strap,

(Low

Static

Wattage,

Tool

may

be

required

disassembly

of

these

maintenance

Description

1/8

0.010

Inch

Blade

3/16

Inch

Open

End,

Inch Inch

Socket

Inch

Socket

Pull Spring

Open

End,

Inch

Key

top

Discharge

Grounded)

when

and

items

should

tool

Inch, 2 Inch

10

Inch

1/4

Inch,

Socket

3/16

Inch

5/16

Inch

3. DISASSEMBLY IREASSEMBL Y

MANUAL

391,

3-3

KSR AND A.

3.01 (a)

RO

TELEPRINTERS

Terminal Auxiliary Unit (TAU)

To remove Sprocket

the

terminal auxiliary

Feed

unit:

Remove TAU. Grasp each end

and

pull straight up.

Disconnect logic connector

located

card

on

TAU.

Remove

connectors.

plug from

top

of

any

cord

Remove if present.

---

----_I

deflector:r-.'

3 Remove

......

.....

--"".,

......

.....

two

......

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

screws.

......

Remove paper

holder

paper

.

and

391,3-4

(b)

Friction

Feed

Remove TAU. Grasp end

and

pull

straight

and

away

from

low

sensor cable.

each

up

paper

®Remove

bustle

cover. l..

Disconnect plug

from located TAU.

LOW PAPER SENSOR

--

connector

on

t:.

?

logic

card

top

of

Remove

connectors.

any

cord

Disengage mounting straight

up.

latch

from

posts. Pull

Note:

In

reassembly, align

MOUNTING HOLE

LOW PAPER SENSOR

low

paper

sensor

Remove Pull

toward

of

mounting

paper

hole

holder

rear

posts.

with

assembly.

and

slide

mounting

REAR

FRAME

off

hole

in

rear

frame.

B.

Power Supply

MANUAL 391, 3-5

3.02

To

remove

Sprocket Feed

(a)

CD

Remove

(b) Friction Feed

CD

Remove

(!.

Grasp power supply until ac plug can ac plug from low paper sensor cable (if present) to

remove power supply.

o Use screwdriver and

power

paper

and

pry and

supply:

holder, deflector,

holder

continue

two

right)

and

at

each

be

removed. Remove

lifting

clips (left

outward.

if

present,

bustle cover. Perform

end;

lift

up

and

away

and

bustle cover. Perform 3.01, steps 1

3.01,

steps 1

through

f

6.

o Disconnect logic

card cable plugs from

located

power TAU,

POWER SUPPLY

(Friction

Feed

through

connectors

on

supply

if

present.

Only)

5.

top

of

and

C.

Power Supply Fuse

3.03

To remove

Sprocket Feed

(a)

CDRemove

(b) Friction Feed

CDRemove

the

power

paper

holder, deflector and bustle cover. Perform 3.01, steps 1

paper

holder

supply fuse:

and

bustle cover. Perform

3.01,

steps 1

through

6.

Pry

replace.

fuse

5.

from

FUSE

holder

and

391,

3-6

D.

3.04

Operator

To

remove

Disconnect plug

Console

the

CD

Some

are

not

from

logic card.

operator

If

cover is button dovetail

keys

on

present

PI07

console:

being

end

slot

KSR

on

opcon

of

one

by

opcon

RO

cable

removed,

of

the

pushing

shown

opcons.

disengage

arms

from

inward. Dis-

the the

/HOUSING

Lift

rear

it

forward

o Move

rearward free. Remove

Note

1:

In

Note

2:

When replacing

adjustment.

edge

of

on

front

lower

edge

until

opcon.

reassembly,

opcon

isolators are

and

mounting

of

opcon

perform

the

cover

pivot

bushings.

the

KEYBOARD

or

indicator

TO

scale,

COVER

perform

(Top

View)

ALIGNMENT

the

COLUMN

Loosen (one

Tilt

top

of

clamps releasing connected

adjustment.

INDICATOR

front

to

two

screws

each

side).

outward,

isolators

the

opcon.

REAR

RAIL

POSITIONING

Note

3:

Loose

loose envelope. These

side frames.

Note

4: Two

be

retained

and

operator

346409

attached

consoles are shipped

parts

must

spacers, also furnished in

to

the

rear

be

assembled

rail

and

with

to

taped.

184056

the

operator

the

loose envelope

screws

console

and

with

346397

before

KSR

isolators furnished in a

installing

operator

into

the

printer

consoles, should

E. Logic Card Fuse

MANUAL 391, 3-7

3.05

(a)

o Remove

(b)

o Remove

To remove

Sprocket

paper

Friction

Feed paper

the

Feed

logic

card

holder,

holder

fuse:

deflector

and

bustle

Remove (one

each

and

cover.

two

side).

bustle cover.

Perform

screws,

if

Perform

3.01, steps 1

present

3.01, steps 1

through

2

Disconnect

Snap

the

spring clips

and

move aside, releasing

frame. (Pry

with

through

6.

cable plugs.

out

of

the

screwdriver.)

5.

place

rear

Gently lifting at hook-shaped the place.

the

rear

pull

to

disengage

top

front

plate

Remove

the

rear

details

and

the

frame

the

of

the

fit

hold

rear

Remove

to

the

rear

hook-shaped

rear

plate.

into

the

rear

frame assembly.

the

(Rear

details

The

notches

frame

logic

card

View)

while

on

in

fuse.

391,3-8

F. Logic Card

3.06

CD

To

remove

Remove

(Perform

the

3.04,

Slowly extension locking

slight

leftward extension side frame, locking position.

the

logic card:

opcon.

steps 1

rotate

on

hole

engages

through

cover

rearward

cover aligns

in side frame. Apply

pressure

the

until

hole

cover

8.)

with

the

in

until

the

into

Remove

(Perform

~

/ 3 Move

,,/

the

rear

frame assembly.

3.05,

steps 1

Disconnect bell cable from

through

logic card and the locking

logic card.

5.) print

carriage fully

Grasp each

push

sides

of

the

end

front

outward

until

tabs

logic card.

head

and

to

the

of

cover

the

are free

right.

the on

o

Disconnect located

@Pl04

CABLE FROM

ENCODER

ON

@Pl03

the

on

the

6-PIN PLUG

\

PRINTER

I

6-PIN

PLUG

following plugs

logic

card:

CABLE

PAPER

LOWER PAPER SWITCH

®

PlOl

(Rear

FROM

OUT

I

6-PIN PLUG

View)

CABLE FROM BELL

ON

PRINTER

CABLE

PRINT

~

OR

CABLE

POWER SUPPLY card is released

~

Pl05l6-PINPLUG

FROM HEAD

~

TO

CABLE FROM

OPCON

8 Grasp

of circuit

pull logic clears down components

@

Pl02

8-PIN PLUG

/'

CABLE FROM

LFMOTOR

LOGIC

CARD

the

two

logic

card

board

card

the

printer

in middle

nylon

and

supports.

rearward

touch

rings

pull

up

from

the

assembly. Push

of

logic card,

front

at

rear

until two

Slowly

until

cover.

it

if

G. Printer

MANUAL 391, 3-9

3.07 (a)

Front

To remove Sprocket

Remove

CD

(Perform

CD

Remove cover.

(Perform

LEFT

SIDE

FRAME

(Right

View)

the

Feed

paper

3.01,

3.04,

printer:

holder.

step

2.)

steps 1

and

5 Loosen

(one each side).

2.)

two

screws

LEFT

PLATEN

PAPER

LEFT

CD

(!)Remove

@Remove

GUIDE

PAPER

STRIPPER

Slide

until

and

remove.

(Perform

Remove ring separator

paper

it

the

retaining

from

paper

shaft.

separator

clears

the

paper

rear frame assembly.

3.05,

steps 1

operator

3.04,

steps

to

the

stripper,

through

console.

3,

5, 6

and

right

5.)

8.)

CD

Grasp slide

the frame assembly housing

opening.

the

bustle cover

printer

through

and

from

the

Tilt

top releasing connected

and

rear

the

rear

SLOT

REAR

ISOLATORS

of

front

FOR

clamps

isolators

to

the

Remove knobs

outward,

opcon.

by

the

left

and

right

pulling straight

platen

outward.

REAR

ISOLATORS

DIRECTION

INSTALLATION

FOR

)

391,

3-10

(b)

CD

Friction

Remove

3.04,

steps 1 and

Feed

cover. (Perform

2.)

PLATEN

LEFTPAPER

GUIDE

LEFT

PAPER

5

STRIPPER

CD

Slide right left remove.

Push

paper

Remove fro m

paper

shaft.

paper

until

paper

stripper,

release

retaining

separator

it

clears

to

the

ring

to the and

rear.

the

~~:::::::~~~~---I

:::~~~~'~r

4 Push

Slide right until retaining

down

rear

on

roller bail lever

(use screwdriver).

paper

release

and

slowly pull

paper

release clears

ring

and

on

to

lever

the

forward

shaft.

[;

View)

FOR

I~-n---

Remove knobs

- - - - - -

GUI/DE RAILS

~

(Right

Front

HOUSING

C

h_

",

\'--------------

NOTCH

FRONT

BUSHINGS

HOUSING

7

Loosen (one

each

ISOLATOR

Tilt

top

releasing

connected

by

----------

SLOT

REAR

ISOLATORS

two

screws

side).

of

clamps

front

to

the

left

pulling straight

outward,

isolators

the

opcon.

and

right

J

FOR

FRONT

BUSHINGS

® Remove

platen

outward.

ISOLATORS

(Perform

REAR

the

rear

frame

3.05,

steps 1 through

Grasp

the printer housing Rotate

housing

the

DIRECTION

INSTALLATION

-(Push)

assembly.

bustle

and

rear

through

paper

to

clear

BUSTLE

COVER

cover

frame

the

release

properly.

FOR

MANUAL

5.)

and

slide

assembly

rear

opening.

to

allow

391,3-11

the from

the

3.08

CD CD

CD

eD

To

replace Install Install Push

opening the

Lock screwdriver (or

forward.

the the

the

bottom

the

pry)

Caution:

(DTighten

Note:

into large holes in

CD

0)

The

the

housing. Position

Replace Replace

the

printer: operator rear

frame

printer

in

printer

the

two

their tbe the

and

the

rear

of

the

and

into

the

screwdriver

Do

not

overtwist the screwdriver.

clamp

front

respective clamps. paper paper

console,

assembly,

rear

of

the

housing

rear

square

screws.

clamps

each

separator

release (friction-feed

if

previously removed.

bustle

frame assembly

housing.

to

frame

hole

with

should

clamp

and

There

steer

the

assembly

in

the

enough

force

be loosely fastened

so

that

platen

cover

and

into

the

are

two

assembly

into

nut

plate to

draw

the

knobs.

only).

deflector,

housing

molded

into

position.

and

gently

the

front

bushings

if

present.

through

guide rails in

Insert

twist

assembly

to

the

nut

(operator

a

the

(Right

plate

Front

before console)

View)

the

assembly is

protrude

pushed

through

the

o Replace

®

Perform

the

cover

the

KEYBOARD

and

paper

TO

holder.

COVER

ALIGNMENT

adjustment.

391,

H.

3-12

Print

Head

3.09

To

remove

the

print

head:

Caution: When handling loose must tor

be taken

pins

to

prevent

print

from being bent.

0)

Grasp

print

head

pull

forward.

of

print

head

engage locking channels.

(Front

View)

Lift to

dis-

and

~

print

heads, care

head cable connec-

G)

front

Unlock pulling locking forward

the

guide

./"'PRINT

HEAD

Move

the

to

the

right.

Raise cover.

print

head

handle

until

it

strikes

rod.

locking

handle

by

Move

print

right

of

the

Disconnect

from

logic card. straight plug

up

pins.

head

print

to

avoid

Remove

(Refer

To Manual, 372,

11.)

and

carriage head head

Gently

damage

ribbon.

to

How

Operate

367

Part

10

to

cable plug.

cable

plug

pull

to

or or

the

Move

retaining extension carriage wall away

from

o Disengage

roll

Remove

REAR

PROJECTION

clip

on

protruding

approximately

wall. (Pry

print

head

on

end

of

print

head.

NOSE

from

with

link.

locking

left

1/4

screwdriver.)

from

handle

side

of

inch

(Left

Side

--_,

View)

FRONT

Remove

lifting

up

grommets.

GROMMET

print

and

head

away

cover

from,

by

MANUAL

391,3-13

3.10

To

replace

the

print

head:

Caution: When handling loose must tor

pins

be taken to

from being bent.

prevent

2 Move

handle from

print

retaining

extension

left

side of-carriage wall approximately from

wall

if

not

moved. (Pry

with

print

heads, care

head cable connec-

clip

on

locking

protruding

1/4

inch

away

already

screwdriver.)

Rotate

rod

key wall.

performing

locking

then

pull

locking

on

locking

Observe

interaction

step

Note: Collar

handle handle

7. and

Verify attached grommets. secure.)

frontward

handle

engages

of

these

link

may

to

until

the

slot

snap

that

print

securely

(Push

it

strikes

right

until

in

right

parts

for

rearward.

head

cover

to

rubber

down

PRINT

HEAD

COVER

the

collar carriage side use

when

is

until

guide

drive

CARRIAGE

CD

Collar manually held carriage wall ing

the print onto of

link.

COLLAR

and

link

rotated

toward

front

link. Install

head

rear

roll

LINK

must

and

of

by

grasp-

notch

at

end

COLLAR

ASSEMBLY

AND

be

AND

LINK

CARRIAGE

FRONT

WALL

CD

FRONT

Pivot

locking

Hold collar down

on

the

nose

projection

front

of

channel.

and

print

link

forward

head)

in

carriage wall

head

down

(by

while,

to

pressing

inserting

opening.

carriage

(Left

View)

391,3-14

3.10

(Top

View)

(DPosition

(Cont)

ROLLER

and

hold carriage assembly printer wrench

carriage wall.

and

to

use a

push

SHAFTS

----',____

RIBBON

~

REAR

3

OF

GUIDE

--17l

'-..-/

Slowly the

ribbon Apply

ha?dle

prInt

handle

Note: Parts

FRONT

print

head

and

to

right

side

of

5/16

inch

socket

clip against

(Front

View)

push

print

carriage

head

locking

guide is even

continuous

at

its

pivot

forward

engages (snaps)

referred

Move

the locking to necessary does not

the

platen

not

properly

head

rearward

channel

with

center leftward shaft, while slowly pulling

until

collar drive

into

to

were visible

handle

to

move

print

by

detent

to

engage

all

head

the

rear,

the

and

until

the

of

roller shafts.

pressure

slot

in

collar.

way

to

in

close

additional

handle.

the

drive

the

collar

further

rear

to

key

in

the

proximity

force

slot

of

locking

on

step

rear

If

handle

key

did

(step

into the

3.

7).

@Check

and cable cable when

® Install

or

11

that

no

connector

carefully

plug does

the

ribbon.

of

connect

to

the

logic card. Make sure

not

touch

left

carriage moves fully left.

this

(Refer

manual.)

to

the

Part

pins

print

side

10

are

bent

head

frame

Note:

clearance before HEAD

detenting

TO

Check

between

PLA

to

make

print

handle.

l'EN

sure

there

head

and

Check

adjustment.

is some

platen

PRINT

MANUAL

391,

3-19

4. DISASSEMBL Y jREASSEMBL Y

PRINTER

A.

Print

Head

4.01

Cover

4.02

Cable

4.03

To

(DRemove

remove

print

and

the

head

replace

cover:

cable:

cover

the

print

(perform

OF

MAJOR COMPONENTS

head,

perform

3.09

4.02, step 1).

and

3.10.

Remove by

from

GROMMETS

print

lifting

up

grommets.

head

and

cover

away

Remove around pins

of

solder

connector

cable

from

connector.

Warning:

desoldering

Note:

shown.

In

Use

a grounded, low-wattage soldering iron (avoid prolonged contact with

tool

to

prevent

reassembly,

damage

make

sure

to

card circuits and components.

insulator

is

positioned

between

Grasp

the gently insulator

remove

cable

from

connector

•

pinsj

connector

the

connector

the

circuit

and

along with a

and

card.

circuit

card

as

391,

3-16

Ribbon

4.04

Guide

To

remove

Note: Visually

replace

4.05

CD

if

damaged.

To

replace

Remove cover.

(Perform

4.02,

the

ribbon

inspect

the

ribbon

step

the

wire guide

1.)

guide:

for

guide:

ORANGEWOOD

STICKS

Lift

ribbon

of

ribbon

center

cracks

guide

guide slightly

frame.

While

gently

pry

ribbon each Remove

or

guide

side)

up

the

damage whenever

Slowly until thru 96364 between position up

upper

pulling

lower

until

ribbon

no. 1 and

holes

with

locking

forward

they

push

flat

respective

tab

and

pull

until

it

clears

RIBBON

LOWER LOCKING TABS

on

the

ribbon

locking

clear

the

guide.

the

ribbon

no. 9 print

in

wire guide.

gauge

or ribbon wires

guide

until

GUiDE

guide,

tabs

(one

center

guide

equivalent

and

no. 1 and

holes

in

top

the

frame.

onto

wires

Insert

center

the

is

removed,

center

an

into

no.

wire guide.

frame

can

be

0.010 opening

frame

9 wires line

and

seen

inch

and

NO.9

NO.1

COIL ASSEMBLY

®

Remove manually back wire is its respective guide.

CD

Gently no. 1 and

COIL ASSEMBLY

orangewood

move

each

and

forth

and

positioned

hole

wipe

no. 9 print

sticks

armature

verify

properly

in

the

ink

from

and

each

into

wire

surface

wires.

LEFT

BANK

ASSEMBLY

of

REAR

Continue forward locking

Push

and armatures orangewood pole

plate

Print

wires

extend

beyond

Note: Lubricate

pushing

until

tabs

lock

no. 1 and

rearward

stick

and

the

no. 1 and

other

the

print

ribbon

upper

and

snap

into

place.

no.

9

by

placing

between

armature.

wire well area.

no.

9 will

wires.

the

guide

lower

Wire Guide

MANUAL

391,3-17

4.06

Note:

of

Sleeve

4.07

To

remove

CD

Remove

wire guide is against

CD

Remove

(perform

the

RIBBON GUIDE

In

reassembly, insert wire guide

To remove

the

4.02,

the

wire guide:

ribbon

guide

(perform

4.04,

steps 1

and

2).

~WIREGUIDE

I

~

~5

ENCLOSURE

the

cover

step

bottom

sleeve:

of

1).

ribbon

(DInsert

into

ribbon

guide enclosure.

guide as

pointed

under

wire guide bottom enclosure. Grasp wire guide straight

of up

shown

flat blade

and

gently

wire guide clears

to

remove.

above

and

(hobby

pry ribbon and

push

down

PRINT

knife)

up

until

guide

pull

WIRE

until

HOOK

bottom

armature wires) and

armature

gently

until

sleeve slides free

tab

NORMAL

outward

clears

POSITION

(away

of

print

bobbin.

PRINT

ARMATURE

from

wire

ARMATURE

print

hook

WIRE

ARMATURE

Grasp ribbon armature guide) bobbin. gently

RIBBON

TAB

armature

guide

(magnet

away

until

armature

Pull

armature

outward.

GUIDE

and

from

push

will

ribbon

touches

and

COIL

toward

pull

sleeve

CD

Remove sleeve

Note: In reassembly,

extension

edge. Lubricate

from

make

armature

sure sleeve is

any

extension.

armatures

positioned

removed

PULL

over grooves in

and

replaced.

OUTWARD

armature

extension

and

flush

with

391,3-18

Coil Assembly

4.08

CC

o

To

remove

Remove

4.07,

steps 2 and

the

coil assembly:

print

head

BRASS NUTS

armature

(perform

3).

cover

Loosen

(perform

two

4.02,

pole

step

o Pry

0Pull

plate

1).

locking

until

it

clears

the

coil assembly

straight

Use a spring

screws.

up

tab

the

and

hook.

on

bobbin

pole

remove.

SPRING

plate.

Remove

coil assembly terminals.

solder

from

HOOK

around

Note:

nuts

tightening removed

B.

4.09

In

and

Spacing

To

reassembly,

verify

and

correct

screws.

replaced.

Motor

remove

note

position

Lubricate

Belt

the

spacing

positioning

as

shown

any

motor

belt:

of

brass

before

armatures

Warning:

prolonged contact with terminals) along with a

detDldering tool

Use

a low wattage tDlderingiron (avoid

to

prevent

damage

Push tension to

2 Remove belt.

top

arm

remove

to

circuitry.

of

spring

rearward

belt

tension.

MANUAL

391,

3-19

C. Spacing

4.10

To

remove

8 Remove

3.06,

steps 2 through

(Right

Motor

the

logic

Side

View)

Pull pulley off

end

of

spacing

card

(perform

8).,

with

shaft.

motor:

clip

Remove

~

Remove

housing

.

..

::/@ Remove screw, lockwasher,

y

~

motor

7 Remove

and

two

motor

flat

washer

and

encoder.

Remove

and

spring washer.

two

mounting

lockwashers.

belt.

and

tension

spring

Remove

nut.

Remove cable assembly

by

lifting

arm

Remove

post.

tension

screws

upward.

post

spring

from

arm.

@Remove

and

three

screws

lockwashers.

- I

-------.J

Remove

under

housing encoder. pry

screwdriver

the

fastener

encoder

bridge

Hold

encoder

which is

9

Remove

PRY

POINT

disc assembly.

and

under

disc

with

outward,

removing disc.

part

of

cover.

(Insert

bottom

thumb

the

disc assembly.)

screwdriver

hub

of

and

gently

Retain

Note:

rub

on

encoder

In

reassembly,

assembly.

make

sure

disc does

not

Warning: Do

not

pull

on

metal disc edges will deform encoder disc causing the encoder.

it

to

rub against

as

this

391,

3-20

D. Line

4.11

Feed

To

remove

(a) Early Design

Note:

In

reassembly, make LINE

Motor

(Left

the

line feed

Rear

View)

motor:

FEED

Remove

steps 2

through

BELT TENSION

the

logic

8).

adjustment

card

(perform

Loosen remove

3.06,

four

screws

the

line feed belt.

and

(b)

Late

Design

Remove

steps 2

the

logic

card

(perform

through

8).

~7C:::-_~!II1I.®

Remove flat washer

Remove retaining ring tension

from

arm

pivot

and

shaft.

3.06, Remove line

Remove and

stop

tension

arm

and

lockwasher.

and

slide

roller assembly

three

post,

feed

Remove spring post.

screws

bracket.

belt.

tension

from

arm

retaining

Note: In reassembly,

make

STOP BRACKET

adjustment.

E.

Platen

MANUAL

391,3-21

4.12

To

remove

( a) Early Design

Note:

In

reassembly,

the

position

platen:

the

setscrews away

from

the

slot in

the

platen

Remove

and

clip.

platen

pulley

(b) Late Design

Loosen and

remove

and

clip.

two

setscrews

platen

Remove from

retaining

pulley

tension

post.

arm

spring

391,3-22

( c ) Early'

two

Slide

(one

each

and

Late

each side)

platen

side)

~

Design

Sprocket

Feed

Remove

outward.

-B-c=F{jI====O

two

bearings

retaining rings (one

from

platen

bearings.

(Top

View)

CD

Lift guides

Sprocket

Feed

left

and

right

paper

to

up

position.

Only

0=

Only

Remove

(one

each

two

side).

sprocket

Friction

Feed

Only

clips

Loosen (two

Note: In reassembly,

Perform ENDPLA Y adjustments.

F. Lead Screw

4.13

the

To

LEFT

remove

four

each

and

the

lead screw:

setscrews

side).

position

RIGHT

the

setscrews away

SPROCKET

from

adjustments

G)Push

the

slot

and

PRINTED

in

Rotate housing housing,

in

the

right

bearing

90

degrees

away

inner

RIGHT

FRAME

INNER

BEARING

Slide (one

sprocket

LINE POSITION

and

from

and

SIDE

clip.

housing

spring will

side frame.

outer

bearings

two

each

and

to

clear

force

Remove

and

sprockets

side)

outward.

PLATEN

right

frame.

bearing

spring.

and

(Right

Side

View)

Unscrew

remove

Retain free

through

left

when

lead

inner

lead

screw

hole

bearing

screw is

from

carriag~

in

right

which

removed.

nut

and

side frame.

will

be

Remove pulley

pulling

lead

and

to

clip

the

screw

by

right.

MANUAL

391,

3-23

G. Carriage With

4.14

CD

To

remove

Remove (perform

print

3.09

Post the head

and

Assembly

carriage

and

lead

4.13).

with

screw

post

assembly:

Remove

rod

and

rear

guide

carriage.

Spread front clamp

CARRIAGE

side

frames

guide

rod,

with

cover.

outward

two

felt

Remove

(one

each

Remove (one

and

washers

two

side).

two

each

side).

remove

and

screws

H. Lead

4.15

CD

To

Remove (perform

Screw

remove

print

3.09).

Nut

the

head

o Remove lead screw

(perform

CD

Tilt notch tabs

force

4.13).

lead

screw

in carriage.

on

nut

away

nut

align

from

lead

handle

Rotate

with

carriage.

screw

nut:

outward

counterclockwise

opening

in

carriage. Spring will

to

clear

retaining

(CCW)

until

LEAD

SCREW

NUT

RETAINING

NOTCH

LEAD

NUT

ROTATE

SCREW

HANDLE

CCW

o Remove spring

and

nut.

391,3-24

I.

Collar With

Link

4.16

CI'

J. Paper

4.17

Note

CD

To

Remove (perform

To remove

(a)

Sprocket

1:

Remove

rings

remove

CD

the

collar with link:

print

head

3.09

and

4.14).

Remove compression

ring.~

Tray

the

paper

Feed

Parts

on

left

and

two

retaining

from

paper

tray

and

right

shaft.

carriage

tray:

sides are similar.

Remove

CD

Pull

CD

Push locking and collar fully

(forward). Pull the handle

(rearward) aligns Locking

paper

tray.

paper

handle

rotate

right while slowly

tray

locking

counterclockwise

the

and

collar clockwise

until

with

slot

in

handle

shaft

out

to

handle

key

on

carriage.

will

pop

right.

the

left

and

to

rotating

handle

out.

CD

Remove

from

Note

(b)

paper

2:

In

Friction

retaining

reassembly,

tray

Feed

ring

shaft.

LEFT

AND

PRY

POINTS

RIGHT

Lift loosen position by

using a screwdriver

PAPER GUIDE

left

and

right

mounting

paper

adjustments

Push the

PAPER GUIDE

Unhook

tray

paper

screws

guide

bracket

must

paper

rear.

Push rear

(using screwdriver).

and

springs

guides friction

toward

on

the

be

made.

release

down

on

roller bail lever

to

pry

to

and

retain

(one

up

tight,

points.

to

two

paper

each

side).

position,

and

the

frame

the

MANUAL 391, 3-25

4 Remove

roller

Remove

paper

tray

bail spring

Remove

retaining

shaft.

from

post.

roller

bail assembly.

ring

from

Pull

remove.

paper

tray

shaft

to

the

left

and

Unhook springs

and

(one

retain

each

two

side).

paper

tray

391,

K.

3-26

Paper

Guides

4.18 (a)

Note

similar

To

Sprocket

1:

Left

manner.

(])

Remove (one

remove

and

each

the

Feed

right

two

side).

paper

guide:

guides

springs

are

LEFT

PAPER

GUIDE---~

removed

in

a

two

retaining

each

from

5 Remove

pers

CD

stop

on

side).

paper

shaft.

(one

Slide

right

paper

the

bracket.

two

paper

each

paper

until

stripper

tail

on

strip-

side).

separator

it

clears

and

the

paper

to

the

left

remove.

guide

Note

must

Remove

(one

rings

Remove retaining

ring

separator

2:

During reassembly,

go

behind

the

(!)Remove

guides

Note

3:

(b)

Friction

No

tel:

in a similar

left

from

In

reassembly

Feed

Left

and

manner.

Remove (one

each

and

posts

right

two

side).

right

paper

on

brackets.

LEFT

guides are

springs

AND

CD

RIGHT

removed

Remove

guides

With

paper position screwdriver in

PAPER

left

from

paper

GUIDE

and

posts

Remove (one

Slide right paper

guides

up,

loosen

guide

bracket

the

pry

points.

adjustments

right

paper

on

brackets.

two

retaining rings

each

side).

paper

until

it

stripper

Remove retaining ring paper

separator

must

separator

clears

and

mounting

toward

the remove.

be

to

the

left

shaft.

the

made.

screws

frame

from

friction

by

using a

tight;

With

paper

two

paper

Note

2: During reassembly,

guide

must

go

behind

guides

strippers

the

stop

up,

(one

remove

each

the

tail

on

the

side).

on

the

bracket.

paper

L. Signal Bell

MANUAL

391,

3-27

4.19

To remove

retaining ring.

the

signal bell:

3 Remove screws

clamp

and

remove

. bracket.

(1

Remove plug

logic card.

and

LOCATING

from

LUG

Remove gong.

Slide

Remove plunger and

remove coil.

screw

plunger

to

the

spring

and

with

right.

and

OPERATOR A.

Spacebar

4.20 (a) Disengage

pull

CONSOLE

Mechanism

To

remove

from

toward

SPACEBAR BUMPER

the

spacebar mechanism:

the

leaf

the

wire bail using a spring

the

front

(Fig. 2).

spring

(bronze

hook

i1t=7ijj'i

and

SPRING

HOOK

(one

toward

~RE

BAIL SPRING

Fig.

2-Leaf

of

spacebar)

the

(b) Disengage

end while pulling front

(Fig. 3).

LEAF

Spring Disengagement

two

rear

tines

with

a small screwdriver

spacebar

up

colored)

and

at

each

the

Fig.

3-Spacebar

(c)

Continue spacebar

(d) Remove

right spacebar guides (snaps in

(Fig. 4).

Fig.

applying

and

disengage

the

wire bail

4-Wire

upward

Bail Removal

Removal

pressure

the

two

from

CHANNEL

(Rear

View)

to

front

tines.

the

left

and

out)

the

and

391,3-28

4.21

B.

4.22

To

reassemble

(a) Make sure

notches

leaf spring is engaged

(b) Check mechanical

bar position slowly.

Keys

To remove (a) There are

operator

(1)

(2)

in

the

so

that

freely

Control Indicator

Nonindicator Data

when

the

two

console.

Key

Fig.5-Keys

the

spacebar mechanism:

the

four

tines

spacebar housing

to

the

wire bail.

operation

it

returns

keys (Fig.

types

to

depressed

5):

of

keys used

6)

lb

engage

of

the

its

unoperated

and

the

and

the

space-

released

on

the

Fig.

7-Control

(d) To remove

(1) Remove keys BACK

LINE, GS, US, LINE

and

QUOTES

key using (2)

Disengage with a small screwdriver while pulling

the

RETURN

(Fig. 8).

RETURN

that

346260

the

key

surround

tool.

rear

up

Key Removal

key

with

housing:

SPACE, OVER-

FEED,

the

tines

from

and

toward

SHIFT,

RETURN

housing

the

front

(b) To

Warning: CAPS LOCK,

and CPS unlatched position before

over

remove

key

and

Fig.

6-Data

keys

data

must

keys, place

pull

up

to

Key Removal

PARITY,

be in

the

346260

remove (Fig. 6).

tool

DUPLEX, fully extended, attempting

to

remove the key. Failure to observe this pre-

caution will result in a damaged keyswitch.

REAR

TINES

(Rear

View)

Fig. 8-Rear Tine Disengagement

(3)

Continue the

front

tine Remove key with housing (Fig. 9).

applying

RETURN

from

key

housing using a spring

upward

and

HOUSING

pressure

disengage

from

channel

to

the

hook.

(c) To

remove

(1) Grasp key using

finger.

(2)

Exert

control

upward

keys

force

(Fig.

thumb

until

7):

key

and

index

releases.

Fig.

FRONT

TINE

9-Front

(Front

View)

Tine Disengagement

MANUAL

391,

3-29

4.23

Insert locating lug

Housing

channel C.

4.24

To

reassemble

housing

on

must

tines.

Key Spacer

To

remove

the

with

key;

housing

snap fully

the

key (a) Remove key associated to (b)

4.25

first key

B.

Keys.)

Slide spacer and

Fig.

To

reassemble

then

10-

to

the

to

the

pull

rearward.

Key Spacer Removal

the

key:

observe

and

into

spacer:

left

key

press

front

with

(if

present).

as

far

spacer:

position

into

and

spacer,

as

it

of

channel.

rear

and

(Refer

will go

Fig.

12-Solder

Warning:

iron

ing

along

to

keyswitch

(d) Place and

embossed

Use a grounded

(avoid

with a desoldering

prolonged

card

346257

press

downward.

projections key switch , squeeze to

lift

keyswitch

BASIC

KEYSWITCH

out

JlI~SOLDER

REMOVED

Removal

circuits

tool

When

and

(Fig.

low-wattage

contact

tool

to

and

components.

over

the

snap

pull

back

13).

prevent

keyswitch

tool

into

solder-

with

damage

bottoms

notches

on

the

pins)

and

on

tool

(a)

Insert

spacer

to

the

Fig.

the key

II-Key

ing

encloses

(b)

Replace keys.

SPRINGS

D. Key switch es

4.26

To

remove (a) Remove key. (b)

Remove

shield.

(c) Remove solder

of

keyswitch

from

the

right, observe

push

rod

Keyswitch

(Right

View)

Spacer Alignment

the

keyswitches:

four

screws

from

to

be

removed

left

and

the

SPACER

PUSH

and

around

and

while push-

that

the

rear

ROD

circuit

terminal

(Fig.

spacer

spring.

card

pins

12).

Fig.

Note:

the tines

4.27 Insert

The

keyswitch

on

the

To reassemble

new

locating lug,

Switch channel

must

tines.

resolder.

Cable (KSR)

E.

4.28

To

remove

(a) Remove

DUPLEX

(b)

Remove PARITY,

(Fig.

14).

13-Keyswitch

tines

of

the

housing

Removal

tool

and

channel.

the

keyswitch:

key switch , observe

and

press

keyswitch

snap

fully

into

Hold

the

PRINTER

and

CPS keys.

keyswitch

cable:

INTERLOCK,

(Refer

DUPLEX

to

and

D. Keyswitches.)

must

pass

the

inside

position

into

front

in

place

TEST,

(Refer

to

PRINTER

CPS

keyswitches

between

of

the

of

the

channel.

and

rear

and

PARITY,

B. Keys).

TEST,

391,3-30

(c)

Remove pins

Fig.

14-Keyswitch

of

cable

solder

to

4 4

KEYSWITCHES

Identification

from

be

6 4

6

around

removed

4

4&

(Fig.

4

~SOLDER

REMOVED

connector

15).

Fig.

17-Cable

(h) Remove (i) Slide cable

circuit

between

rear

card. Remove

channels

Connector

plate

to

the

(Fig.

(Top

(Fig.

right

18).

View)

18). until

through

(Right

Removal

it

clears

Rear

View)

the

opening

Fig.

Warning:

15-Connector

Use

a grounded, low-wattage

Pins Fig.

sol-

ing iron (avoid prolonged contact with pins)

along with a desoldering tool to prevent damage

to card circuits and components.

(d) Remove

front Use a spring the

mounting

SPRING HOOK

(Pull

(Top

View)

Cut

( e)

circuit

the

circuit

of

the

control

hook

to remove

posts

(Fig.

Up)

Fig.

16-Cover

the

cable tie securing

card.

card

cover

keys

from

the

16).

Removal

the

located

the

channel.

cover

cable

from

to

the

in

4.29

F.

4.30

To Insert

(a)

card

connector

(b)

Fasten cable tie.

(c)

, Reassemble

removed

( d) Replace

4.28

(e) Replace

(f) Replace

Cable To

(a) Remove

(refer

18-Cable

reassemble

new

cable

holes

and

in place

cable

to

in

4.28

circuit

(d).

rear

plate.

circuit

(RO)

remove

the

interlock

to

D. Keyswitches.)

Removal

the

cable :

connector

press

and

resolder.

card

the

key

(a)

card cover

card

cable:

into

circuit

into

place.

using locally furnished

switches

and

(b).

shield.

keyswitch

Hold

cable

and

removed

(Fig.

key

in

i9)

the

cable

(f) Grasp

and

index

finger.

(g)

Exert

upward

releases (Fig. 1 7).

connector

force

until

using

cable

thumb

connector

\

~

~.

Fig.

19-Interlock

INTERLOCK

KEYSWITCH

""

Switch

MANUAL

391,

3-31

(b)

Remove pins

of

solder

cable

to

from

be

removed

4).

..

around

4

4&

6

connector

(Fig. 20).

~SOLDER

REMOVED

Fig.

2o--Connector

Warning:

Use

a grounded, low-wattage sol-

dering iron (avoid prolonged contact with pins)

along with a desoldering tool to prevent damage

to card circuits and components.

(c)

Cut

the

cable

tie

securing

(d)

(Fig.

circuit

Remove corner

21).

card.

the

screw securing

of

the

circuit

Pins

card

the

to

cable

the

to

right

channel

the

rear

G. Channel

4.31 (a) Remove all

nel

To

(KSR)

remove

to

be

the

channel:

key

tops

replaced.

associated

(Refer

to

B.

(b) Remove all keyswitches associated

channel

to

be

replaced.

(Refer

switches.) (c) Remove

screws

--===================~~~-

and

side frame

loosening

by

one

screw (Fig.

removing

right

Channel 6

with

chan-

Keys.)

with

to

D. Key-

four

23).

Remove

Loosen

Fig.

21-Screw

the

(e) Grasp

index

(f)

Exert

cable

finger (Fig.

upward

releases.

(g) While biasing

the the

circuit right cable.

card

until

it

clears

Removal

connector

22).

force

until

the

right

downward,

the

circuit

(Top

View)

using

thumb

cable

rear

corner

slide

the

card. Remove

and

connector

of

the

cable

to

Channell

(Top

View.-::\)~====~~~~~~~~-

Fig.

(d)

If

removing Channel

and

tor

console (Fig.

23-Right

locating

Side

plate

24).

Frame

No.4,

from

left

Remove

Removal

remove side

of

Channel

screw

opera-

4

Fig.

22-Cable

Connector

Removal

Fig.

24-

Locating

Plate

(Top

View)

391,3-32

(e) Pull

4.32 (a)

Left

Note Note

channel

To reassemble

If

channel

OCCOCQClc::x:x:x:J':-

00000

<>ooo,~

Side

1:

Left

side

2:

Remove

to

the

being

replaced

_-_-_

-_-::::::..::..::::::

has

curved slot;

backing

right

and

lift

channel:

has

tape

._-

_-=-

=

right

paper

from

RM79266

RM79331~--~~~

::

out.

=.~

side

one

Fig.

on

=

-=::

side

one

or

both

=-::

=-_

-::

=-

_-

_"ccccxX:JE:X:lC::-

000.00000

has

square slot.

only,

if

25-Channel

sides,

applying

and

Tape

apply

tape

_-_

-::. _ -_

-_

RM79324

to

TAPE

-_ -_-::

new

::

=-

::

vinyl

channel.

-::.

-_ -_-

=

tape.

-::.

-"':'Ot:lCOOC

000000

Right

Side

(b)

Slide

channel

(c) Replace

If

(d)

removed,

LEFT

right

replace

to

the

left

SIDE FRAME

side

frame

channel

RM79324Mio::~--

Fig.

26-Tape

and

engage

tines

o

Cl Cl Cl

OOOOOOG

TINES

Fig.

27-Channel

with

all

channels

locating

plate

Identification

on

left

side frame.

/CHANNEL

,.

c:::J

Cl

C"

Engagement

engaging side

on

left

side.

frame

tines.

(e) Replace keyswitches removed.

keys

(f) Replace

removed.

H.

Channel

MANUAL 391, 3-33

(RO)

4.33

To

remove (a) Remove all keys (b)

Remove

(c) Remove

(d) Remove

all keyswitches the

(Top

View)

the

channel:

(refer

two

screws securing

right

side

to

B.

(refer

Remove

frame

Keys).

to

D. Keyswitches).

the

circuit

Fig.

28-Channel

by

removing

card

to

the

~

-...

0000

t===:CIRCUlT

Removal

four

screws (Fig. 29).

channel

(Fig. 28).

CHANNEL

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

....

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

-------

CARD

0000005

000000

Pull

(e)

channel

to

the

right

and

Fig.

lift

29-Right

out.

Side

Frame

Remove

Removal

391,3-34

4.34 (a) Slide

Note:

Left

To reassemble

channel

Left

side

has

LEFT

SIDE FRAME

Cc:x:JOOCCJCXlClCJ

00000

0000

Side

the

channel:

to

the

curved slot;

- _ -_ - _ -_ : _

left

and

_-~ _ _ - - _

engage

right

Fig.

-_

- -

tines

side

has

30-Channel

:-_

-=-

:.

-=

~

=-

Fig.

on

left

square

-~-_

.:

=-

-

·oOt::Jt:¥:XJClOCJ

31-Channel

side

frame

slot

(Fig. 31).

CHANNEL

Engagement

00000

=-_ -._

000

(Fig. 30).

-_

-_ -_--~ .:

=-

:.

~_

- _ -

_-

=-

-_

OD

O~

ooooeo

Right

Side

(b)

Replace

(c) Replace

right the

side

two

frame

screws

with

that

channels

secure

the

(d) Replace all keyswitches previously removed.

keys

(e) Replace all

I.

Circuit Card

4.35

To disassemble (a) Remove (b)

KSR

circuit (c) KSR

Channel

circuit

Only

card

Only -

No.1

previously removed.

Components

the

circuit

card shield

-

If

circuit card

cover

(perform

If

circuit

card

(perform

card

components:

by

removing

components

4.28

(d)).

components

G.

Channel (KSR)).

engaging side

channel

four

to

the

screws.

be

replaced are

be

replaced are

frame

circuit

tines.

card.

located

in

Row A of

in

Row B of

circuit

card, remove