Itel UD002441-1 Operation, Service And Parts Manual

MAGNETIC TAPE

WORD

PROCESSOR

UD002441-1

FIELD

ENGINEERING

DIVISION

SEPT., 1972

This information

is

current

as

of

September 1972.

ITEL

CORPORATION

FIELD

ENGINEERING

DIVISION

Technical Support Operations

10435 North Tantau Avenue

Cupertino,

California 95014

Tel: [phone] TWX 910-338-0280

Printed

in

U.S.A.

September

1972

Copyright(£)

1972

Chapter

1

2

3

4

2441-1

CONTENTS

GENERAL

INFORMATION.

1. 1 Introduction

1. 2 Manual

Content

1.

2.

1

Chapter

1,

General

Information.

1.

2.2

Chapter

2,

Installation.

1.

2. 3

Chapter

3,

Operation

.

1.

2. 4

Chapter

4,

Theory

of

Operation.

1.

2. 5

Chapter

5,

Maintenance

1.

2.

6

Chapter

6,

Checks

and

Adjustments

1.

2.7

Chapter

7,

Error

Analysis

1.

2.8

Chapter

8,

Replacement

Procedures

1.

2.9

Chapter

9,

Diagrams

1. 3 System

Description

1.

3.1

Microprocessor

1.3~2

Keyboard

.

1.

3.

3

1.

3.4

1.4

Printer.

Ma

gnetic

Tape

Transports

Specifications.

INS TA

LLA

TION .

2. 1

Unpacking.

2.1.

1

Unpacking

the

Typewriter

Unit

2.1.2

Unpacking

the

Console

Unit

.

2. 2

System

Interconnections

2. 3 Preoperational

Checkout

.

2.3.1

Power

Supply

Voltage

Checkout.

2.3.2

System

Diagnostic

Checkout

.

OPERATION

.

3.1

Keys,

Controls,

Indicators

and

Alarms

.

3.

1.

1

Basic

Operation

Keys

.

3.

1.

2 Mode

Keys

.

3.

1.

3

Action

Keys

3.

1.

4

Encoded

Function

Keys.

3.

1.

5

Console

Controls

and

Indicators.

3.

1.

6

Alarms.

3.2

Operating

Instructions

.

THEORY

OF

OPERA

TION .

4. 1

Functional

Description

.

4. 2 Microprocessor.

4.2.1,

Read

Only

Memory

(ROM)

Program

4.2.2

ROM

Address

Register.

Page

1-1
1-1
1-1
1-1
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2

1-3
1-3

1-4
1-4

1-5

2-1
2-1

2-1

2-1

2-3

2-5
2-5

2-7

3-1
3-1
3-1

3-4

3-6

3-8

3-11

3-12

3-13

4-1
4-1
4-1
4-1

4-6

i

CONTENTS (CONT)

Chapter

5

4.2.3

4.2.4

4.2.5

4. 3 Buffer

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

4.12

4.13

MAINTENANCE .

5. 1

5.2

5.2.1

5.2.2

5.

3

5.3.1

5.

3.2

5.4

5.4.1

5.4.2

5.4.3

Return
General
Arithmetic

Tape
Write
Read

Tape
Motor
Keyboard
Printer
Miscellaneous,
Display
DC

Power

Safety
Maintenance

Objectives.

Basic

Tools

Tools
Test

Power

Voltage

Logic

Use

Address

I/O

and

Control

Encode
Decode
Read/Write

Control.

Interface

Interface.

Panel

Supplies

Precautions

Considerations

and

Servicing

Equipment

Supply

Levels

Levels

of

Probes

Purpose

Logic

Buffer

.
.

and

Clock

.

Philosophy

Voltage

.

Register

(GP)

and

Unit

(ALU) .

Control

Tape

.

and

Aids

.

Read

IC .

.

Main

(M)

Only.

Registers

Page

4-7

4-8
4-8
4-8
4-9
4-9
4-9
4-10
4-10
4-12
4-12
4-13
4-13
4-13

5-1
5-1
5-1
5-1
5-1
5-2
5-2
5-2
5-6
5-6
5-6

5-7

ii

6

CHECKS AND

6.1

6.2

6.3

6.4

6.5

6.6

6. 7

6.8

6.9

6.10

6.11

6.12

6.13

6.

6.

6.

General.
PDA
ROM
Branch
Branch
PDA

G-Registers
H-Registers
ALU

Buffers

Data

Data

Keyboard

14

Printer

15

Transport

15.1

Installation

Test

Test

Test

Bus
Bus

Run

ADJUSTMENTS

·

Test
on

Data

·

Test
Test

.

Test

·

Test

Test

Forward

.

Out

(Lamp)

In

(Thumbwheel)

Strobe

Tests

Test

.

. . .

Normal

Test.

Test

Test

6-1
6-1
6-1

6-6

6-7

6-9
6-10
6-10
6-11
6-12
6-13
6-14

•

6-15
6-16

6-17

6-18
6-18

2441-1

CONTENTS (CONT)

Chapter

7

8

6.15.2

6.15.3

6.15.4

6.15.5

6.15.6

ERROR

7.1

7.2

Run

Reverse

Run

Forward

Run

Reverse
Speed
Normal

ANALYSIS .

General.

Recommended

REPLACEMENT

8.1

8. 2

8.3

8.4

8.4.

8.4.2

8.4.3

8.4.4

8.4.5

General.

Printer
Keyboard
Transport

1

Head

Motor
Lock

BOT/EOT

Cassette

and

Removal

Assembly

Solenoid

Installation

Normal

Fast

Fast

Tests

Write

.

Forward

Troubleshooting

PROCEDURES

and

Removal

Removal

and

and

Removal

Removal

and

Removal

Sensor

In

Place

Assembly
Switch

Test

Test

Test

.

Test

Installation

Installation.

Installation

and

Installation.

and

and

Sequence.

Installation.

Installation

Removal

File

Protect

and

Installation.

Switch

Page

6-20
6-21
6-22
6-23
6-26

7-1
7-1
7-1

8-1
8-1
8-1
8-1
8-2
8-4
8-6
8-6
8-7

Removal

8-8

9 DIAGRAMS

9. 1

9.2

Figure

1-1
1-2

2-1
2-2
2-3
2-4
2-5

3-1

3-2
3-3
3-4

3-5
4-1

4-2
4-3

Magnetic
Simplified

Typewriter

Console

Typewriter
System
Power

Basic
Mode
Action
Encoded
Console

Console,
Detailed
K-Page

General.

System

Tape

Wire

Word

System

Unit

Packaging

Unit

Packaging

Cover

Interconnections

Supply

Operation

Interconnect

Keys

Keys.

Keys

Function

Controls

Keys.

and

Right-Hand

System

Memory

Block

Structure

List

ILLUSTRATIONS

Processor.

Block

Removal

Diagram

Panel

Indicators.

Interior

View.

Diagram.

9-1
9-1

9-24

Page

1-1
1-3

2-2
2-2
2-4
2-4
2-6

3-1
3-4
3-6
3-8
3-11

4-2
4-4
4-5

2441-1

iii

ILLUSTRATIONS

(CONT)

Figure

4-4
4-5
4-6
4-7
4-8
4-9

5-1
6-1

Major-Page
12-Bit
ROM
Bi-Phase
Motor
System

PDA
PDA

Schematics:

Address

Address

Control

Clock
Controls
Installation

Printer
Keyboard
Miscellaneous,
ROM
ROM
Return

Main
Arithmetic
Buffer
Buffer

Tape
Read
Write
Motor

Cassette
Tape

Display
DC
Keyboard
PDA
PDA

Memory

Word

Register

Serial

Power

Data

Block

Timing
and

Indicators,

Interface

Interface

Program
Address

Address

and

General

Logic

I/O

(Read

Control
Control
Decode

Encode

Control

Heat

Read/Write,

Panel

Supply

Logic

ROM

and

Switch

and

Structure

Format

Diagram

,

(socket

(socket

Clock,

(sockets

Register

Register

Purpose

Unit

Only & Read/Write)

(Read

(Read/Write & Read

(Read/Write & Read

(Read/Write)

(sockets

Sink

Tape

.

Controls

Indicator.

1)

3),

and

IC

(socket

5,

6, 7,

(socket

(socket

(socket

Only & Read/Write)

R/WJ1

,

Read

9)

Register

12) ,

(socket

and

Only

and

8)

,

10) ,
(socket

Only)

Only)

19)

ROJl).

(sockets

4)

11),

(sockets

(sockets

(sockets

(sockets

R/WJ2

13

and

17

18

14

and

and

and

15) .
and

16)

20)

21).

ROJ2)

Page

4-5
4-6
4-7
4-10
4-11

4-14

5-4

6-1

9-2
9-3
9-4
9-5
9-6

9-7
9-8

9-9
9-10
9-11
9-12
9-13
9-14

9-15
9-16
9-17
9-18
9-19
9-20
9-21/9-22
9-23

Table

1-1

2-1

3-1
3-2

iv

Dual

Station

Power

Encoded
Encoded

MTWP

Supply

Function
Function

Voltages.

TABLES

Specifications

Codes
Keys.

Page

.

1-5

2-7

3-5
3-8

2441-1

TABLES (CONT)

Table

4-1
4-2

6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10
6-11

7-1
7

-2

8-1
8-2
8-3

Card
Other

PDA
Error
ROM
Branch

Branch
ALU
Buffers
Data

Transport
Speed
Normal

PWA's

Troubleshooting

Transport

Head
BOT/EaT

Cage

Routine

Test

Bus

Assembly

PWA's

Console

Addresses

Tests.

Tests

on

Data

"Error

Test

Out

Tests

Conversions

Write

Affected

Power

Sensor

PWA's

Addresses

.

Test

"Error

Addresses"

"Error

(Lamp)

Forward

Addresses"

Error

.

According

Chart

Connections

Connections

Assembly

Test

Analysis

"Error

.

Addresses"

Sequence

Addresses"

to

Priority.

.

Connections.

Page

4-3
4-3

6-4
6-5
6-7
6-8

.

6-9
6-13
6-14
6-15
6-20
6-24
6-27

7-2

7-3

8-3

8-4

8-7

9-1

Diagrams.

9-1

2441-1

v

/

CHAPTER 1

1.1

INTRODUCTION

This

manual
single
Both
printer,

form

ports

and

systems

and

an

automatic

are

attractive

provides

dual

station

combine

one

(single

contained

case

suitable

GENERAL

installation,

Magnetic

the

functions

station)

writing

in a compact

system.

for

secretarial

INFORMATION

operation,

Tape

Word

of a Microprocesflor,

or

two (dual

The

Microprocessor

console.

use.

and

Processor

station)

The

keyboard

service

(MTWP) ,

magnetic

instructions

shown

an

electronic

tape

and

magnetic

and

printer

for

both

in

Figure

keyboard

transports

tape

trans-

are

housed

the

to

1-1.
and

in

an

Console

Figure

1.2

This

ided

MANUAL

Magnetic

into

nine

CONTENT

Tape

Word

chapters.

The

chapter.

1.2.1 Chapter 1, General Information

This
ment

chapter

description,

provides

and

introductory
the

2441-1

1-1.

Magnetic

Processor

following

material, a description

specifications

\

Tape

Operation,

paragraphs

for

the

Word

Service,

briefly

system.

Typewriter

Processor

and

Diagrams

describe

of

manual

Manual

the

contents

contents,

is
of

an

div­each

equip-

1-1

1.2.2 Chapter 2, Installation

Chapter 2 discusses
installing a system.
vided

1.2.3 Chapter

in

this

chapter

3,

Chapter 3 identifies
and

indicator

1.2.4 Chapter

The

theory

and

timing

1.2.5 Chapter

on

4,

of

operation

diagrams

5,

Chapter 5 outlines
required

1.2.6 Chapter 6, Checks and Adjustments

Electrical

special

and

mechanical

unpacking,

A

preoperation

to

verify

Operation

and

describes

the

console,

Theory of Operation

is

provided

are

used,

Maintenance

safety

tools

precautions,

and

test

inspection,

that

and

where

equipment.

checks

the

the

system

in

and

and

checks

and

system

function

alarm.

this

chapter.

necessary,

presents

adjustments

the

interconnections

adjustments

is

operating

of

each

key

Block

to

support

maintenance

are

contained

procedure

properly.

on

the

keyboard,

diagrams,

the

text.

philosophy,

in

required

is

simplified

and

Chapter

when

also

control

lists

6.

pro-

drawings,

1.2.7 Chapter 7, Error Analysis

This

chapter

1.2.8 Chapter 8, Replacement Procedures

Chapter 8 presents

1.2.9 Chapter 9, Diagrams

This

chapter

Programmed

1.3 SYSTEM DESCRIPTION

The

ITEL
tronic
only
the

system

the

capabilities

single

dual

• A

contains

information

removal

contains

the

Diagnostic

or

dual

for

automatic

station

of

system

the

single

Microprocessor.

and

schematic

Aid

(PDA). The

station

writing.
will

station

designed

installation

Magnetic

be

discussed.

to

diagrams

system

Tape

The

functions

system.

assist

in

procedures.

for

the

wire

Word

Processor,

of

The

dual

The

major

troubleshooting.

system

list

is

as

also

well

included.

(MTWP)

both

are

identical;

station

does,

components

as

those

is

therefore,

however,

of

the

for

an

elec-

extend

system

the

are:

• A

full

duplex

1-2

electronic

keyboard.

2441-1

•

An

electronic

printer.

Figure

• Two

1-2

provides a simplified

TYPEWRITER

magnetic

~~

..

alT

DATA

FLOW

tape

transports.

block

1-------1

TYPOWRITER INTERFACE

r-----

LSlNGLE

STATlDN

SYSTEM

-----

diagram

-

__

~

MAGNETIC TAPE

TRANSPORTS

DUAC

...

"ON

ovm.

of

the

system.

CONSOLE

~----------l

II

, , I

k::j

Ii'

, , I

MICROPROCESSOR

L ________ j

----:

___

I .

, I

! i

! i

~

i---

L

__

BUFFERS

_

---l

-~

'

i

I

i

1.3.1 Microprocessor

Microprocessor

The
These

It

is
keyboard,
mation
Memory

1.3.2 Keyboard

The
of
rather
from
system

to

sixteen-bit

also

has

processed

is

gated

portion

keyboard

this

type
than

the

keyboard.

during

indicate

an

eight-bit

is

processed

I?rinter,

on

of

used

of

keyboard,

directly

normal

the

present

Figure

has

instruction

and

and

the

in

to

A

1-2.

the

parallel

on

both

off

the

Microprocessor.

this

system

signals

the

printer.

standard

typing

operation.

Simplified

capability

words

this

magnetic

data

operations.

are

data

bus

data

bus

is a full

are

All

44-key

These

routed

System

of

storing

used

(DB.0

bus.

tape

by

The

transports

the

duplex

through

system

typewriter

Certain

lighted

16 BtT

Block

4096

to

control

through

instruction

functions

keys

DB7). Any

data

bus

together

electronic

the

array

keys

also

INSTRU~TlON

WORD

BUS

Diagram

sixteen-bit

the

operation

links

words

keyboard.

Microprocessor

are

inputs

are

lighted,

monitor

instruction

information

the

Microprocessor,

into one

stored

controlled

information

the

words.

of

the

system.

which

unit.

in

Through

when

Microprocessor

Infor-

the

Read

to

the

by

the

into

depressed,

Only

the

use

printer,

operator

the

2441-1

1-3

and

flash

to

key

on

the

keyboard

1.3.3 Printer

The

printer,
character
text

such
six

lines

at a time).

as

per

display

used

letters,

inch

input, output, and

and

each

alarm

as

the

output

It

operates

device

specifications,

(single

space)

or

system

is

discussed

for

at

speeds
contracts,

three

the

up

lines

error

conditions.

in

detail

system,

to 30

characters

etc.

per

inch (double

is

of a serial

The

15-inch

The function

in

Chapter 3 of

per

long

space).

this

type

(prints a single

second

platen

of
manual.

on

general

indexes

each

at

There
feed.
controls
ASCII
direction
1/60
line
1/48

Character
wheels

Two
by

are

code

of

spaces

of

types

the

operator.

Each

are

and

an

an

are

three

motion

for

inch),

(indexes)

inch).

sets

easily

of

carbon.

1.3.4

The

Magnetic

dual

station
store a single
8-bit

word

enroute

these

of

in

the

on

to

the

8-bit

buffer

tape.

basic

is

sent

down

the

next

number

or

an

are

provided

interchanged

ribbon

cartridges

The

Tape

Transports

system

line

of

the

data

printer.

characters.

and

then

printer

motions;

controlled

the

eleven

character

of

printing

ll-bit

that

the

word

paper

in

the
by

are

styles

has

available

two

typewritten

bus,

comes

A

single

Information

outputed, a

carrier,

by

the

system
data
to

be

spaces

which

is

to

form

the

operator.

available

include

lines.

printed,

to

be

of

The

be

moved

specifies

moved

an

88-character

and

single

circulating-type,

information.

from

line

line

either

of

typewritten

from

at a time,

the

the

print

wheel

through

an

data

ii-bit

the
lines

by

the

direction

by

the

these

too

reusable

live-memory,

This

information,

keyboard

information
keyboard
onto

the

(character),

printer

transmit

word

which

the

carrier

paper

feed

print

are

easily

fabric

or

magnetic

is

stored, a line

read/write

and

interface.

either

specifies

(in

multiples

and

number

(in

multiples

wheel.

These

interchangeable

and a single-use

MOS

buffers

in

the

form

tape

can

contain

(R/W)

paper

These

the

7-bit

the

of

of

vertical

of

print

which

of

an

storage

up

to 256
at a time,
magnetic

The

magnetic

20

inches

the

read
directionally
per

second.

the

system,

per

only

tape

transports

second

magnetic
reading
The

functions

are

controlled

and

bidirectionally

tape

at

20

1-4

are

transport

inches

of

each

by

the

capable

searching

(dual

per

second

magnetic

operator

of

unidirectionally

at

70

station

and

tape

from

system

bidirectionally

transport,

the

keyboard.

reading

inches

only)

like

and

per

second.

is

only

searching

any

other

writing

Naturally,

capable

at

70

functions

at

of

uni-

inches

2441-1

of

1.4 SPECIFICATIONS

The

specifications

listed

in

Table

for

1-1.

the

dual

station

Magnetic

Tape

Word

Processor

(MTWP)

are

Table

CHARACTERISTICS

MICROPROCESSOR:

Type

of

storage

Storage

Instruction
Memory

capacity

cycle

access

KEYBOARD:

Typewriter

Lighted

array

Function

Non-Lighted

Repeat

keys

1.1.

Dual

time

time

keys

Function

Station

keys

MTWP

Specifications

SPECIFICA

Read

Only

65,536

(4096

words)

2

J.1.s

1

J.1.s

maximum

44

keys

12

4

Hyphen,

index,
rier

reverse

return,

period.

TIONS

Memory

16-bit

backspace,

index,

space

(ROM)

instruction

forward

X,

car-

bar

and

2441-1

Maximum

PRINTER:

Number

Print

Print

Line

Print
Paper

input

of

characters

speed

line

length

spacing

quality

feed

rate

500

characters

88

>30

characters

(on

general

132

characters

(10-pitch)

12

per

inch

6

per

inch

per

inch
Standard
15-inch

per

text)

at

or

158

(12-pitch)

(single

(double

typewriter

platen

fed

second

per

second

10

per

characters

spaced)

spaced)

inch

or

1-5

at

3

Table

1-1.

Dual

Station

..

CHARACTERISTICS

Copy

capacity

MTWP

Specifications

(continued)

Original

SPECIFICA

plus·

TIONS

five

carbons

Ribbon

Print

MAGNETIC

Read/Write
Search
Start
Stop
Start
Stop

MAGNETIC

Type

Tape
Capacity

type

element

TAPE

TRANSPORTS:

speed

speed

time

time

distance

distance

CASSETTE:

Cartridge
fabric

loaded

or

single-use

Interchangeable

20

ips

(average)

70

ips

(average)

50 ±

10

ms @ 20

50 ±

10

ms @ 20

0.5

±

O.

I-inch @ 20

O.

5 ±

O.

I-inch @ 20

Modified
Computer
300,150

Philips

grade

and

75

(reusable

print

ips
ips

feet

carbon)

wheel

ips

ips

1-6

Storage

Maximum

capacity

search

time

ENVIRONMENTAL:

Temperature

Humidity

range

POWER:

Primary
DC

by

internal

supply

power

voltages

or

range

requirement

supplies)

rewind

(developed

50K, 25K,

acters

51,

26

and

8%

min.

imum

115
+24V ±

+15V
+5.12V

-5V

-9V

-15V

wet

VAC ±

2.

±

O.

±

±

O.

±

O.

±

O.

and

13

to

bulb

10%@

6V
75V

O.

25V
45V

75V

12K

seconds

80%

temp.

05V

char-

max.

15

(max-

80°F)

A

2441-1

Table

1-1.

Dual

Station

MTWP

Specifications

(continued)

CHARACTERISTICS

PHYSICAL:

Console
Typewriter

Console

Typewriter

Connecting

service

dimensions

Height

Width
Depth
Weight
Mounting

Height
Width
Depth
Weight

openings

service

dimensions

cables

openings

SPECIFICA

Both

side

Removable

panel

30.5

inches

12

inches

22

inches

<

140

lbs.

Leveler

8.45

inches

22.5

inches

19.63

< 50

2; AC

to

inches

lbs.

power

console

panels

cover

feet

TIONS

and

typewriter

and

access

2441-1

1-7

2.1

UNPACKING

The

Magnetic
prior
console)

to

shipment.

are
procedures
containers,

If

damage

units

from

any

return

Tape

separately

to

attain

examine

is

evident,

their

packaging.

shipment.

Word

Processor

Individual

packaged

optimum

each

for

contact

INSTALLATION

units

that

into two
system
broken

the

transportation

Original

CHAPTER 2

is

inspected

comprise

containers.

performance.

bands,

packaging

for

crushed

company
material

mechanical

part

of

Perform

Before

walls,

and

the

system

the

removing

or

other
involved
should

be

electrical

(the

following

units

signs

before

retained

operation

typewriter

unpacking

from

of

their

damage.

removing

to

facilitate

and

the

2.1.1 Unpacking

Use

the

following

Figure

2-1.

1.

2. Remove

3.

4.

5.

6.

7.

2.1.2

Use

Unpacking

the

following

the

Typewriter Unit

procedure

Position
stand

where

Remove
Remove
Remove

on

desk

or

Visually
physical

Retain

the

all

Console

procedure

to

the

packaged
it

is

the

tape

the

tape

the

plastic

the

typewriter

typing

examine

damage

packaging

Unit

to

remove

typewriter

to

be
securing
securing

sheet

stand.
the

surfaces

has

resulted.

materials

remove

the

used.

the
the

from

from

the

typewriter

unit

top

flaps

top

flaps

typewriter

the

inner

of

the

for

possible

console

unit

unit

from

on

the

floor

of

the

outer

of

the

inner

unit.

container

typewriter

future

from

its

near

container.
container.

and

unit

use.

its

container.

container.

the

desk

set

it

into

to

ensure

See

or

typing

position

that

no

See

Figure

2-2.

1.

Using a hand
or

typing

2. Remove

3.

Lift

4.

Break
console

5.

Slide

the

the

container

down

unit

the

console

pOSition.

2441-1

truck,

stand

two

one

is

where

bands

up

of

the

set.

unit

transport

it

will

wrapped

and

away

end

flaps

from

the

the

console

be

used.

around

from

the

on

the

telescoping

unit

to a location

the

container.

console

unit.

telescoping

tray

and

tray

set

near a desk

into

which

it

in

its

the

operating

2-1

2-2

PLASTIC

SH£E:T

/

Figure

2-1.

Typewriter

Unit Packaging

BANDS

CONTAINER

TELESCOPING
TRAY

Figure

2-2.

Console

Unit Packaging

2441-1

6.

Remove

the

protective

plastic

covering

that

surrounds

the

console

unit.

7. Unwind
S.

Examine
damage

9.

Retain

2.2 SYSTEM INTERCONNECTIONS

Use

the

following

and

2-4.

1.

Tilt

2.

Depress

the

the

has

all

packaging

procedure

the

typewriter

the

AC

power

surfaces

resulted.

to

connect

two

platen

writer.

3.

4.

5.

Raise

and
Raise

and

Pull
case

the

left-hand

TAB

CLEAR/SET

the

right-hand

10/12

forward

from

levers.

on

the

the

typewriter.

cord

of

the

materials

the

platen

release

lever

levers.

lever

two

upper

and

interconnection

console

for

two

system

cover

upward

levers

switch

bank

switch

case

unit

possible

components.

to

and

that

bank

that

release

to

ensure

future

expose
lift

the

supports

supports

levers

cable.

that

use.

the
platen

and

no

physical

See

Figures

platen.

from

the

the

MARG

the

remove

LEFT/RIGHT

SINGLE/DOUBLE

the

2-3

type-

upper

6.

7.

S.

9.

10.

11.

12.

13.

Remove
Lay

in

Locate

NOTE:

A7P1
A7P2
A7P3
A7P4

Place

the

removed
Examine

broken

Replace

place.

Lower
Lower

the

two

screws

the

typewriter-to-console

and

mate

the

four

Alternately,
A

7P1,

A 7P3

34-pin
56-pin
14-pin
14-pin

cable

in

the

connections,

the

both
the

step

interior

upper

lever

platen

clamp

6.
of

loose

cover

switch

cover.

that

secure

following

tighten

and A 7P4

back

into

the

typewriter

screws,

and

then

banks

the

cable

innerconnection

typewriter-to-console

both

screws

in

place.

Printer
Keyboard
Power
Lever

place

or

the

platen

into

place.

to

Interface

Interface

Connector

Switch

and

to

Interface

secure

ensure

debris

by

clamp

cable.

secure

Connector

Edge

using

there

located

snapping

to

lower

connectors.

Connector

Connector

the

are

in

the

them

case.

two

screws

no

loose

typewriter.

back

or

into

14.

Remove

lower

Lift

it

the

edge

up

2441-1

right-hand

of

the

and

away

panel

from

access

and

pulling

the

panel

frame.

from

it

away

the

from

console

the

by

frame

grasping

structure.

the

2-3

Typewriter

-----

Platten

Cover

Platten

Release

Levers

(2)

A7P2

Figure

2-3.

Typewriter

Cover

Removal

A7Pl

A7P3

2-4

Figure

2-4.

System

------

Interconnections

Cable Clamp

2441-1

15.

16.

17.

Examine

are

no

the

console.

Verify

that

seated

PWA in

Verify

the

loose

in

its

the

that

interior

or

broken

each

printed

respective

card

cage

the

following

of

the

console

connections,

wiring
socket

is

listed
internal

from

loose

assembly

of

the

card

in

Chapter 4 of

connections

this

side

screws,

(PWA)

cage.

are

is

this

to

ensure

or

debris

properly

The

location

manual.

secure:

that

there

located

located

of

each

in

and

Printer

Keyboard
R/W
Read/Write
RO
Read

NOTE:

18.

Examine

19.

Release

sensors

2.3 PREOPERATIONAL CHECKOUT

Once

the

be

checked

diagnostic

system

for

checkout.

components

proper

Interface

Interface

Tape

Control

(R/W

Tape

Control

Only (RO

Leave

to

each

the

the

facilitate

tape

door

to

with a lint-free

have

operation.

2.3.1 Power Supply Voltage Checkout

(PWA 1)

(PWA

(PWA 17)

J2)

(PWA 20)

J2)

right-hand

the

system

transport

each

tape

wiper

been

unpacked,

This

involves a power

3)
to

Tape

to

Tape

side

diagnostic

for

physical

transport

dampened

inspected,

access

and

with

panel

checkout.

damage.

wipe

90%

and

supply

off

off

the

heads

isopropyl

connected,

voltage

and

EOT

alcohol.

they

may

and a system

Use

the

voltages.

2441-1

following

See

Figure

1.

Remove

lower

Lift

2.

Lower

screws.

3.

Examine

loose

4.

Verify
circuit

5.

Connect

6.

Set

procedure

2-5.

the

edge

it

up

and

the

power

the

or

broken

that

breaker

the

CB1

to

ON.

to

initially

left-hand

of

the

panel

away

supply

interior

connections,

the

two

(CB1)

power

power

side

access

and

pulling

from

the

frame.

interconnect

of

the

console

15A

fuses

and

POWER

cord

to a 115 VAC, 60

up

loose
(F1

and

the

system

panel

it

away

panel

from

screws,

F2)

switch

from

from

by

this

are
are

Hz

or

to

the

console

the

loosening

side

or

debris

installed

set

to

power

verify

frame

to

ensure

in

and

the

source.

power

by

grasping

structure.

the

two

there

the

console.

both

OFF

supply

securing

are

the

main

pOSition.

the

no

2-5

DC Regulator

PWA

Use

care

An

AC

in

the

power

POWER

CAUTION

when

voltage

supply

pushbutton

probing

level

of

section

is

power

circuits.

115VAC

when

depressed

is

present

the

to

off.

TB2

W1

(Ground Bus)

Figure

7.

Depress
to

ON.

8.

Using a Weston
measure

respect

the

the

to

ground

minal.

9.

10.

Return
tighten

Replace
place

the
the

and

the

pushing

2-6

2-5.

POWER

Model

voltages

power
two

securing

left-hand

Power

switch,

4440

present

bus

(WI),

supply

side

the

lower

Supply

Interconnect

located

Digital

at

the

Table

interconnect

screws.

access

edge

panel

against

on

the

front

Multimeter

terminal

2-1

lists

panel

by

to

setting

the

Panel

panel

(DMM)

strips

voltages

its

upright

the

frame

structure.

of

or

(TB1

present

upper

the

console,

an

equivalent,

and

TB2)

at

position

edge

with

each

and

into

2441-1

ter-

Table

2-1.

Power

Supply

Voltages

Terminal

Terminal

1
2

)

3

4
5

}

6
7
8

2.3.2 System Diagnostic Checkout

Use

the

following

1.

Ensure

Strip

+24 ±

+15

-22.5 ± 2.5

-15 ± 0.75

-9

-5

procedure

that

TB1

Voltage

:!:

±0.45
±0.25

to

the

2.6

Vdc

0.75

Vdc

Vdc

Vdc

Vdc

verify

POWER

proper

switch

Terminal

system

is

set

Terminal

1
2

}

3

4

}

operation.

to

OFF.

Strip

TB2

Voltage

+5.12 ± 0.05

+11 ±

1.

Vdc

2 Vdc

2.

3.

4.

5.

6.

7.

8.

Install
Perform
When

remove
Replace

place
Wipe

90%
Position

Adjust

NOTE:

all

and

off

isopropyl

the

Programmed

each

routines

the

PDA.

the

right-hand

pushing

all

exterior

the

console

each

leveller

If

the

floor,

so

that a minimum
tween
rug

ventila

diagnostic

have

the

lower

covers

alcohol.

into

foot,

console

the

leveller

the

bottom

pile

in

order

tion.

Diagnostic

routine

been

performed

side

access
edge

using a lint

its

operating

as

required.

is

placed

feet

of

of

the

to

provide

Aid

(PDA)

outlined

panel

against

on a carpetted

must

1-inch

console

in

and

by

the

-free

position.

be

adjusted

exists

and

adequate

in

sockets

Chapter

the

system

setting

frame

wiper

be-

the

27

6.

operation

the

upper

structure.

dampened

and

edge

28.

verified,

into

with

2441-1

2-7

CHAPTER 3

OPERATION

3.1

KEYS, CONTROLS, INDICATORS AND ALARMS

Each

key

on

the

understanding

•

• Mode

•

•

In

each

classification, a key

illustration

The

controls

a

description

is

keyboard

as

to

Basic

Action
Encoded

provided

and

indicators

of

each

their

has

functions:

Operation

Keys

Keys

Function

is

for

each

located

system

been

Keys

Keys

first

group

alarm

classified

identified,

to

on

the

is

presented.

and

assist

Console

presented

and

then

in

the

are

as

its

function

location

then

identified

follows

is

of

each

to

provide a better

defined.

discussed

and

defined

An

key.

and

3.1.1

Those

they

Basic

keys,

control

typewriter

Operation

highlighted

the

basic

keyboard.

Keys

in

Figure

operations

All

are

3-1,

of

the

found on

are

classified
system.
both

the

as

Normally,

single

and

basic

each

dual

operation

is

found on a

station

keys

since

systems.

Sutal

.. ! 10

DCIUILE

IBBI

standard

..

Figure

Character
these
As

each
transferred
associated

space.

numeric

Set -There

are

capable

character

with

The

keys.

of

three

is

struck,

to

the

system.

that

code

underscore,

are

to
hyphen,

2441-1

3-1.

44

standard

functions:

the

8-bit

A

print

be

printed

period,

Basic

character

lower

ASCII

sequence

and

the

and X keys

Operation

keys

case,

code

will

upper
associated

be

carrier

Keys

located

case,

initiated

to

be

are

the

on

the

and

an

with

that

to

cause

advanced

only

repeatable

keyboard.

encoded

character
the

character

one

character

All

of

function.

will

alpha-

3-1

be

Space
to

Bar

right

seconds,

Bar

remains

- The Space

one

character

the

carrier
depressed

Bar,

space

will

or

when
for

each

continue

until

the

depressed,

depression.

to

move

from

right-hand

will

left

stop

cause

If

held

to

is

reached.

the

for

right

carrier

greater

for

so

to

than

long

move

500

as

the

from

milli-

Space

left

Shift - The

shift

of

case

8-bit

left-

the

keyboard

ASCII

or

right-hand

(no

code

associated

Shift Lock - The Shift Lock
position.

Carrier
move
vertical

Lever.

vertical

When
carrier
referenced

The

lock

Return-

to

the

left-hand

index

If

held

indexing

depressed

return"

in

paragraph

will

be

The

Carrier
margin

operations

for

greater

for

as

together

will

be

encoded

tion.

TAB

CLEAR/SET

The

lever,
carrier
hand

margin

left-hand

when

to

be

margin

pOSition.

Lever -This

placed

stored

or

to

by the

There

the

printer

key

mechanically

released

and

specified

than

long

as

with

3.2

of

down

(SE

system.

must

left

Shift

key,

movement).

with

each

when the Shift

Return

the

key,

paper

by the

500

milliseconds,

the

Carrier

the

CODE key

onto

the

this

manual

lever

T)

is

will

A

be

at

of

the

right-hand

when

setting

tape.

used

cause

tab

least

held

As

each

struck

locks

only

key

when

depressed,

feed

to

of

Return

during

Refer

for

details

to

electronically

the

cannot

one

margin.

depressed,

character

character

the

left-hand

is

depressed.

execute

the

SINGLE/DOUBLE Line Space

the

paper

key

remains

the

Record

to

the

on

code

for

be

set

directly

character

will

is

transferred

will

the

number

feed

mode, a "required

Operating

the

use

set

the

present

space

cause

is

struck,

Shift

key

cause

the
of

will

continue

depressed.

Insutructions

of

this

encoded

or

clear

position

at

the

left-

to

the

an

electronic

the

upper

to

the

in the

upper

carrier

forward

forward

tab

locations.

of

or

right-

right

of

system.

ca

to

func-

the

the

se

POSitioning

stored

will

be

The

lever,
carrier
be

set

the

location.

cleared.

when

pOSition

for

playback.

NOTE:

carrier

When

This

placed

to

Tab -Depression

tion

to

the

first

set

position;
When

will

graph

depressed

be

encoded

3.2

of

onto

this

together

manual

MARGLEFT/RIGHT
hand

sent

margin

position

pOSition. The

of

the

to a

tab

placed

may

be done

down (SET)

be

encoded

Since
tronic
ical
be

cleared

cept

of

the

Tab

tab

location

with

the

tape

for

Lever -This

lever

carrier

to

location

up (CLEAR)

at

during

onto

the

the

storing

function

tabs),

all
when

for

those

key

will

provided

the

CODE

..

Refer

details

to

on

lever

when

be

stored

and

together

any

carrier

the

tape.

of tab

(there

tab

locations

the

encoded

cause

that

key,

the

the

use

is

placed

by

the

placing

the

with

position.

Record

In

this

locations

are

noac'tual

power

is

onto

the

carrier

the

carrier

during

Operating

of

this

used

to

electronically

up

(LEFT)

system.

lever

the

CODE

mo:.e,

way,

tab

is

will

an

mechan-

will

automatically

turned

tape.

to

move

is

not

the

Record
Instructions
encoded

will

With

up

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on,

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from

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present

mode, a "required

referenced

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set

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tabs

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stop

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right-

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right-hand

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tions

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margin.

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together

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for

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continue

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ten

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to

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Figure

3-2,

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alarms

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inch

(SINGLE)-

to

electronically

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detail

in

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set

the

line

inch (DOUBLE).

of

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3.

1.

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to

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writer

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3-4

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slashed.

indicate

codes

Table

3-1

that

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Table

3-1.

Reference
Stop

Transfer
Switch
Search
Switch and
SINGLE/DOUBLE
First

Line

Encoded

Stop

Search

Find

key,

all

If

CODE

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Line

prerecorded

PRINT

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margin

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REF

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TSTOP
SW
SCH
SW/SCH

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tab

settings

encoded

function

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mode
Duplicate

cause a high
R/W

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licated.
all
address

next

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Control

automatically

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and

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(PUP) -

without

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data

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f5

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present

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PARA, LINE, WORD,

Track
Format
First
Page

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be

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in

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lighted

on

paper.

location

address

Link LINK

Line

End

This

right-hand

from

technique.

key

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of

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(1000

If

a 00

all

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up

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FORMAT

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0 to 7

3.2

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Figure

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of

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Figure

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the

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cause
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2441-1

3-7

3.1.4

Encoded

Function

Keys

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depressed.

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highlighted
and

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These

codes

II

8

in

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not

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print

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code
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KEY

REF
STOP

TSTOP
SW
SCH
SW/SCH

L SPACE
FL

FIND
LINK
FORMAT
FLSET
PGEND

when

mode,

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depressed

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details

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when

code.

infor-

the

new

SW

(~)

mode,
during
enables
two

different

SCH

(is)

mode,
must

also
address,
the

prerecorded

played

The

direction
address
actuated

when

SW
mode,

the

/SCH

will

2441-1

-

This

key,

will

encode

playback,

the

operator

tapes.

-

This

will

encode

be

entered

when

back

irrespective

of

as

compared

when

the

tape

is

(1) -

This

encode

will

key,

read

block

the

at

when

and

and

depressed

record a switch

cause

to

when

the

automatically

depressed

record a search

from

during

the

playback,

address.

of

their

search

to

tape

its

key,

and

record a switch

the

is

end

when

(forward

current

at

its

or

together

system

together

keyboard

In

this

chronological

or

block

beginning

at

an

EOR.

depressed

with

code

to

switch

combine

code

at

this

will

cause

way,

reverse)

address.

and

together

and

search

the

(~)

onto

from

and

print

with

the

(is)

onto

time.

the

particular

order

is

determined

an

automatic

with

code

CODE

the

tape.

one

information

CODE

the

tape.

The

system

segments

on

the

An

automatic

the

(1)

key

during

This

reader

key

during

A

code

together

to

automatically

tape.

by

reverse

CODE

onto

key

the

the

code,

to

the

other.

prerecorded

the

two-digit

with

of

information

the

deSignated

forward

search

during

tape.

Record

when

Record

block

the

search

search

is

actuated

the

A

two-digit

read

This

on

address

block

to

can

be

block

is

Record

3-9

block

with

ally
block

address

the

block

switch

address.

prerecorded

must
address,

from

on

one

In

two

this

also

be

when

reader

way,

different

entered

read

to

the

an

operator

tapes

from
during
other

the

playback,

and

can

irrespective

keyboard

at

will

search

the

active

automatically

of

their

chronological

this

cause

combine

time.

the

reader

The

system

for

and

print

order

code

together

to

automatic-

the

prerecorded

information

on

the

tapes.

L SPACE ($

Record
double
code
ally
Space

FL
mode,

mode,

space)

for

select

Lever.

FIND

will

the

playback,

forward

counter
LINK

mode,

added
ally

in

that

SCR -

will

special
Since a
return,
such

vertical

at

(~)

-

will

as

the

skipped

line

This

cause

carrier
special

its

as

typing a mailing

or

will

for

setting

the

prescribed

(~)

-

This

encode

this

code

that

time.

This

encode

first

during

which

key,

the

carrier

carrier

function

f)

-

This

encode

the

present

of

the

key,

and

will

index

key,

when

and

character

playback.

follow the

when

depressed

to

return

becomes

key,

when

and

record a line

setting

Line

Space

line

spacing,

when

depressed

record a first

cause

operations

the

paper

specified

depressed

record a track

to a prerecorded

When

track

link

together

return

will

return

without

be

added

consumes

especially

list.

depressed

of

the

SINGLE/DOUBLE Line

Lever,

regardless

together

line

find

feed

by

together

link

code

added

within a prerecorded

code

will

with

recording

to

the

buffer

considerably

useful

together

space

when

code

read

of

with

code

~)

to

automatically

the

number

with

the

(~)

onto

line,

will

be

automatically

the

CODE

the

contents

when

typing a large

with

the

($

for

during

the

present

the CODE

onto

the

remaining

CODE

the

tape.

cause

key

contents

and

less

tape

CODE

single

key

space

Space

playback,

position

key

during

tape.

execute

When

the

in

key

during

This

that

line

to

line,

all

skipped

during

of

the

the

buffer.

recorded

than a regular

number

during

and f for
Lever.
will

of

read

number

the

first

the

code,

be

of

the

during

Revise

with

of

the

The

automatic-

the Line

the

Record

during

of

line

Revise

when

automatic-

characters

playback.

mode,

The

the

line.

carrier

short

lines,

FORMA T (f4) -
mode,
settings

will

FL
line
vertical
line

stored
number
When the
ally
remaining

reset
PG

return
number
this

3-10

will

must

have

those

SET

(W)

counter.

index

on

the

in

the

of

first

execute

to

the

END

(t)

line

of

time.

encode

next,

carrier

in

value

counter.

lines

This

This

and

follow

tab

and

-

This

A

two-digit

operations

must

first

line

returns

line

find

the

number

the

first

entered

-

This

key,

to

be

number

key,

when

record a format

the

format

margin

key,

when

depressed

numeric

required

also

be

entered

counter

code

of

line

and

or

forward

(~)

forward

counter

from

when

A

two-digit

printed

is

stored

depressed

on

depressed

code.

In

settings

code,

to go

from

as

the

indexes

is

read

vertical

at

that

the

keyboard.

numeric

the

paper,

in

the

together

code

«(4)

this

way,

recorded.

together

which

from

the

the

operator

is

during

playback,

index

time.

together

code,

must

carrier

with

the

onto

the

tape.

the

information

with

the CODE

corresponds

first

line

keyboard

types

at

or

subtracted

the

operations

The

first

with

the

which

also

return

corresponds

be

entered

line

CODE

to

the

on

one
this
plays

from

paper
specified

line

counter

CODE

counter

key

The

key.

number

form

time.

back
the

key,

from

during

new

tab

read

during

sets

to

This

information,

stored

feed

will

by

the

will

sets

to

the

maximum

the

and

as

the

Record

or

margin

playback

the

first

of

forward

the

first

number

number.
automatic-

number

then

be

the

carrier

keyboard

the

operator

2441-1

is

the

at

types
is
equals
cause
When
keyboard

The

The
tion.
no

or

subtracted

the

the

depressed,

carrier
number

It

longer

plays

should

back

from

number

keyboard

and

play

return
00

desired.

information,

the

entered

and

the

counter

back

line
permits
be

reset,

stored

from

the

tape

will

unlock.

counter
the

counter

by

the

number.

the

playback

will

reset

is

automatically

entering

number

When

keyboard,

to

to

the

to

free

run

too

from

of

the

the

lock

value

carrier

number

counter

until

entered

set

and

thus

the

keyboard,

returns

of

will

the

CHAR/STOP

to 00

when

bypasses

or

lines

from

typed

equal

the

power

the

whenever

forward

or

zero.

key

keyboard

is

first

line

this

indexes

played

This

is

depressed.

and

turned

counter

function

used

back

will

the

on.

func-

is

3.1.5

The

the

Console

console

tape

in

Controls

controls

both

tape

and

Indicators

and

indicators,

transports

I-

to

shown

be

rewound,

-I

in

Figure

and

provide

JREcoRe

3-5,

E]

01

READ

IRWI

apply

system

system

status

power,

indications.

cause

Figure

2441-1

I-

3-5.

·1

Console

Controls

[:]

I POWER I

and

Indicators

3-11

Rewind/Eject
tape

to

be

rewound.

pop

open

to

(RW) -These

When

provide

easy

two

fully

access

pushbuttons,

rewound,

to

the

the

cassette.

when

door

depressed,
to

the

associated

will

cause

tape

the

associated

transport

will

Block

Address
address
mode,

the

recorded.
Active

transport
Active

iated

READ

tape

POWER -

to

the

system.

3.1.6

There
These

Alarms

are

include:

Displays -These

being

read

R/W

When

RECORD

is

conditioned

Station

transport

This

four

•

Write

•

Read

•

Search

•

Revise

from

(upper

neither

Station

Indicators -These

is

butterfly

basic

system

errors

errors

errors
errors

two

the

tape

on

the

tape

transport)

condition

exists,

Indicator -This

to

record,

conditioned

switch,

error

otherwise

to

when

conditions

two-digit

associated

will

display

the

indicator

two

indicators

read,

otherwise

depressed,

displays

tape

the

displays

will

it

will

causes

that

cause

indicate

transport.

block

remain

illuminate

remain

will

they

will

primary

both

the

present

During

address

blanked.

when

blanked.

illuminate

remain

power

visual

block

the

presently

the

R/W

when

the

blanked.

to

be

and

audible

Record

being

tape

assoc-

applied

alarms.

Write

The

areas

REC

A

system

key

new

Error

of

tape

Another

end

of

the
sound,
the

end

Read

The

Error

system
keyboard
be

cleared

and

permit

free

to

Search

An

unsuccessful

a

flashing

search

initiated

Alarms

will

tape.

will

flash.

should

write

error

tape

the

tape

of

the

last
Alarms
will

will

lock,

by

depressing

the

continue.
Error

Alarms

SEARCH

without

unless

attempt

If

unsuccessful,

then

This

be

to

write a line

condition
installed

condition

(EOT). When

will

advance

recorded

attempt

an

to

read a line

alarm

the

operator

search

locating

the

key.

block

to

retype

is

indicated

If

the

block

address

the

system

can

in

exists

either

beyond

line

will

and

sound

near
of
the

stop.

CHAR/STOP

the

to

an

EOR

or

address, a reverse

being

of

information

will

be

cleared

the

R/W

the

these

NEOT

The REC

of

information

and

the

key.

line

manually,

the

operator

the

end

searched

lock,

by

and

the

end

of

the

conditions

hole

and

key

PLAY

This

will

if

by

of

tape

search

is

greater

three

an

times

alarm

depressing

information

tape

(NEOT) and

is

encountered;

write

three

key

will

times.

will

an
also

clear

so

deSired.

the

system

is

encountered

will

than

on

two

will

sound, and

the

CHAR/STOP

should

at

an

EOR,

then

extinguish.

If

unsuccessful,

flash.

the

This

buffer

The

alarm

playback

together

during a forward
automatically
the

address

different

the

be

retyped.

the

actual

alarm

back

up

condition

and

the

be

of

the

key.

will

to

the

system

is

then

with

EOR.

can

3-12

2441-1

In

this

flash.

case

This

the

system

condition

would

can

be

cleared

lock,

an

alarm

by

depressing

would sound,

the

CHAR/STOP

and

the

SEARCH

key.

key

would

Revise

When

to

When

Error

operating

sound.

an

Alarms

in

the

Revise

• The

• A

Duplicate

search

• The Rewind

EOR

is

encountered,

mode,

or

is

initiated.

(RW)

the

extinguish.
When

will

These

3.2 OPERATING INSTRUCTIONS

The
encoded
station
such a way
average
solution
solution

out
which
which

applications.
of

the

number

lock,

an

conditions

step-by-step

functions

system

day

for

and

both

books.

the

baSics

the

operator

both

books.

of

characters

alarm

can

will

be

operating

of

the

and

the

other

that a typical

at

the

office,

each

problem.

examples

This

are

Many

of

problem/solution

first

can

build

of

these

sound,

cleared

instructions

system

for

typing

is

first

Figures

what

to

taught.

or
applications

the

following

Margin

pushbutton

Revise

being
and

by

are

the

problem,

outlined.

expect

Control

is

mode

added

the

to

REV

depressing

for

the

presented

single

station

which

showing

from

depressed.

an

key

the

in

Step-by-step

the

the

technique

These

basics

develop a further

are

explained

error

mode

will

conditions

is

be

turned

selected.

existing

will

flash.

CHAR/STOP

basic

operations,

two

separate

system.

may

arise

location

system

uses

are

the

then

of

are

used

understanding

in

will

off

and

line

exceeds

key.

modes,

volumes;

Each

has

during

the

instructions

those

building

used

keys

extensively

block

as a foundation

for

the

detail

in

the

cause

the

REV

50,

one
been
course

then

used

approach

system's

later

an

alarm

key

the

keyboard

actions,

for

the

prepared

of

an

provide

in

each'

through-

from

sections

will

and

dual

in

a

in

many

2441-1

3-13

4.1

FUNCTIONAL DESCRIPTION

The

dual

matic

form

typewriting.

the

retarial

magnetic

contained
blies

(PWA's)

contained

There

Tape
into
iated
the
Refer

are

Read/Write

the

and

DC

Regulator

to

station

typewriter

use.

tape

in a

in

two

sockets

located

Table

Magnetic

The

electronic
transports
compact

comprise

the

electronic

PWA's

or

located

with

assembly

4-2.

A

unit.

Tape

full

duplex

These

(one in a

console.

the

card

associated

Tape

Read

just

each

of

which

CHAPTER 4

THEORY OF OPERATION

Word

circuitry

electronic

cage.

Only

behind

the

Processor
keyboard
are

both

which

single

See

Figure

circuitry

Each

with

each

and

the

respective

two

block

is

associated

and

housed

controls

station

4-1.

is

magnetic

the

Motor

address

is

an

electronic

an

electronic,

in

an

attractive

each

system),

Twenty-seven

of

the

console.

listed

in

tape

Control

transport.

displays.

and

located

Table

system

servo-controlled

case

system

and

the

function,

power

printed

Twenty

4-1

by

transport.

PWA' s

which

There

The

remaining

with

the

used

suitable

supplies
wiring

of
numerical
These

are

is

one PWA

DC

power

for

printer
for

the

these

are

mounted

PWA

supply.

auto-

sec-

two

are

assem-

are
location.
the

assoc-

is

Information,

board
of
moved
data
the
control
each

4.2 MICROPROCESSOR

The
a

through

operation.

to

bus

Printer

circuitry

subsystem

heart

Read

Only
ister, a General
Unit

(ALU).

buffers,

in

the

the

Keyboard

Refer

the

Microprocessor,

to

await

distribution.

Interface

to

or

of

the

electronic

Memory

Purpose

Together

magnetic

tape

form

to

PWA 1

tape

printed

(ROM)

paragraphs.

4.2.1

The
sixteen-bit
tion.
Keyboard

produce

Read

Read

The

Only Memory (ROM)

Only

Memory

instruction

sixteen

Interface

the

buffered

bits

(socket

ROM

of a modified

Interface

the

Block

processed,

The

to

the

storage

wiring

system

Program,

(GP)

Register, a Main

these

circuits

storage,

Program

(ROM)
words.
from

ROM

3)

bits

Program

Each

and

B0'

8-bit

PWA 3

Diagram

processed

printer

during

the

assembly

is

the

a ROM

function

etc.

Each

of

these

(R0'

through

the

Miscellaneous,

through

ASCII

onto

shown

and

code,

the

in

Figure

routed

is

data

to a Buffer

information

during

Record

are

the

Play

mode.

discussed

Microprocessor.

Address

to

of

the

(M)

process

circuits

Register, a Return

Register,

information

(sockets 5 through

words

R15)

designates a specific

are

buffered

Clock

B15.

transmitted

bus

during

4-2.

The
I/O

is

then

distributed

mode

in

The

the

This

or

various

following

unit

and

is

discussed

8)

is

comprised

by

and

IC

from

the

Record
information
assembly

through

functions

pages.

is

comprised

an

Arithmetic

from

in

the

system

the

circuitry

PWA's

the

Key­mode

via

through

the

tape

Address

the

keyboard,

following

of

4096

on

(socket

is

the

of

of

Reg-

Logic

opera-

the

4)

to

2441-1

4-1

READ/WRITE
MAGNETIC
TAPE TRANSPORT

READONLY--

MAGNETIC

TAPE TRANSPORT

RO

J 2

RO

J 1

PWA

28

PWA

1

~_

POWER
SUPPLY

Figure

4-1.

Console,

Right-Hand

Interior

View

PWA

Table

4-1.

Card

TITLE

Cage

PWA's

PART

NUMBER

1
2
3
4
5
6

7
8
9

10

11

12
13

14
15
16
17
18
19
20
21
22

23

24
25

26

27
28

Printer

Not

Keyboard

Interface

Used

Interface
Miscellaneous,
ROM
ROM

ROM
ROM
Return
Main

Arithmetic

Buffer
Buffer
Buffer
Buffer

Read
Write

ROM

Tape

Tape
Read
Not
Not
Not
Not
Not

Program
Program
Program
Program

Address

Address

and

I/O
Control

I/O

Control
Control
Decode

Encode
Control
Decode

Used
Used
Used
Used
Used

General

Logic

(Read

(Read/Write)

Programmed
Programmed

Clock,

and

Register

Register

Purpose

Unit

Only)

(Read

Only)

(Read/Write)

(Read/Write)
(Read/Write)
(Read/Write)

(Read
(Read

Only)

Only)

Diagnostic
Diagnostic

I.

C. 75013801

Register

Aid
Aid

75013805

--------

75013800

75014400
75014400
75014400
75014400
75013749
75013750
75013747
75013748
75013735
75013563
75013735
75013563
75013733
75013731
75013732

75013733

75013731

--------

--------

--------

--------

--------

00015500
00015500

PWA

R/W
R/W
RO

RO

R/W

RO

Power

J1
J2
J1
J2

Display

Display

Supply

Panel

Panel

2441-1

Table

4-2.

Motor

Tape

Motor

Tape

Display

Display

DC

Other

Console

TITLE

Control

Read/Write

Control

Read

Only
Panel
Panel

Regulator

PWA's

PART

NUMBER

75013804
75013564
75013804
75013564

75013809
75013809
75013806

4-3

TYPEWRITER

..

16

BIT

DATA

FLOW

"'12·6IT

DATA

FLOW

8 -81T

DATA

FLOW

SERIAL

DATA

FLOW

OR

DECODED

CQi'·/IMANDS

CONSOLE

r----------

--

--

--

--------

--::l

MICROPROCESSOR I

TYPEWRITER INTERFACE

I i

i I

ALFO

7

M

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BUS

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MAGNETIC TAPE TRANSPORTS

-T

SINGLE

STATION

SYSTEM

DUAL

STATION

SYSTEM

Figure

4-2.

Detailed

System

Block

Diagram

\'--16-BITS

16-BITS

16-BITS

.~

·1

..

16-BITS

---l

1024

1I1-BIT
INSTRUCTION

WOROS

Figure

f

256

16- BIT
INSTRUCTION
WOROS

f.-----

P

W

A

5

4-3.

16-

BITS

K-Page

16-

·1

..

P P

W

A

W

A

6

Memory

BITS

·1

..

Structure

16-

BITS

7

·1·

P

W

A

8

16-

BITS----....J

+

256

16- BIT
INSTRUCTION
WOROS

256

+

HI· BIT
INSTRUCTION

WORDS

+

16- BIT
INSTRUCTION

WOROS

+

Figure

2441-1

4-4.

Major-Page

Memory

Structure

4-5

ROM

Structure

The

overall

on

each

printed

grammed

See

Figure

Each

K-Page

are

four

Major-Pages

contains

256

Addressing
In

order
address
word
Page

to

word
determines
address,

individual
bit

address

memory

16-bit

4;. 3.

is

of

select

is

word

word.

structure

wiring

instruction

then

subdivided

to

the

16-bit

each

required.

which

and

the

stored

assembly.

words,

every

instruction

of

the

4096

The two

K-Page

eight

low

in

the

Major-Page.

of

the

Each

therefore,

into

four

K-Page

sixteen-bit

upper

will

be

order

ROM

is

section

sections,

or

16

words.

order

addressed,

bits

(A~

Figure

configured

or

page

stores

each

is

referred

called

Major-Pages

See

Figure

instruction

bits

(A10

bits

A8 and A9

through

4-5

illustrates

7)

into

four

sections,

1024

to

as a K-page

Major-Pages.

in

alL

Each

4-4.

words

and

from

All)

determine

determine

the

of

theseprepro-

Thus,

Major-Page

ROM, a

of

each

the

address

format

one

section

(lOOO=lK).

there

12-bit

address

the

Major-

of

of

the

each
12-

All

'--------------K-Page

The

number

possible

4.2.2
The

each

ROM

ROM

instruction
comprise
Address
either

the
Register
Adder
sum

sums

if

the
address.
Next

Absolute

Address

A 10

A9

Figure

shown

(4

x 4 x 256 = 4096).

in

parentheses

Address Register

Address

Register

word

the

Register.

Register,

12 low

(socket

the

carry-in

This

and

order

10),

or

information

input

address

Address

Register,

another

A8

1

_______

....

.

4-5.

(socket

from

ROM.

These

the

Output

"B"

bits

the

present

is

enabled.

is

then

Register.

group

12-Bit

indicates

Figure

elements

Address

from

12 ilEA"

parallel

From

of

A7

Address

9)

forms

include

ROM,

bits

on

its

The

loaded

there

12

flip-flops,

A6

A5

Instruction

Major-Page

Address

Word

the

total

the

12-bit

4-6

illustrates

the

Register.

the

12

from

an

input

output

external

lines

from

into

the

address
out

A4 A3

Word

Address

Address

(4)

Format

number

of

address

the

Multiplexer,

The

Multiplexer

"AB"

bits

addressing

and

adds a one

the

Adder

the

12

flip-flops

is

onto

the

(4)

address

word

four

major

Adder,

from

the

is

clocked

address

A2

Al

(256)

combinations

used

to

elements

Next

is

used

Return

source.

to

the

the

next

that

constitute

into

the

lines.

AO

address

that

Absolute

to

select

Address

The

resultant

absolute

the

Output

4-6

2441-1

FROM

ROM

TO

ROM

Combined,
means
and
mation

will
unless

by

return,

contained

be

developed.

otherwise

these

which

and

MULTIPLEXER

four

major

the

sequential,

external

in

the

Typically,

directed

CARRY·

IN

Figure

elements

addresses

ROM

word

by

the

4-6.

intrapage

are

to

the

ROM

decode

ROM

and

Address

the

branch,

developed.

determine

Address

of

the

NEXT
ABSOLUTE
ADDRESS
REGISTER

Register

associated

extra

The

which

one

Register

ROM

word.

gating

page

gating

of

forms

OUTPUT

ADDRESS
REGISTER

CB

circuitry

branch,

circuits

the

five

sequential

extra

decode

basic

provide

page

the

addresses

addresses

TO

RETURN
ADDRESS
REGISTER

the

branch

infor-

4.2.3 Return Address Register

The

Return
addresses
an

extra

another,

first

address

4-bit

mine

Right-Shift

whether

return

Address

The

JUMP

coded

from

Address

which

page

jump

in a first-in

used.

the

address

Register.

and

ROM

Register

consists

and

return

last-out

Each

Left-Shift

address

pushed-up

RET

commands

bits

on

this

2441-1

(socket

of

bits

operation

fashion.

of

the

registers.

is

pushed-up

from

the

used

PW

A~

through

12 "A

registers

in

A.

10)

is

used

All.

is

commanded.

Therefore,

II

bits

of

Clocked

or

pushed-down

is

conjunction

to

retain

These

the

the

present

commands

applied

with

up

to

addresses

Each

last

address
address
decoded

in

the

on

the

ROM

addressing

four

of

are

is

stored,

stored

is

from

registers.

AB

lines

the

stored

one

stored

ROM

The

to

the

are

12-bit

whenever

after

will

be

in

separate

bits

12-bit

ROM

also

ROM

the

deter-

de-

4-7

4.2.4 General Purpose

The

General

with

the

registers

ferred

from

through

ROM

bit

Information

the

input

M-Register

bit

word.

When

is

the

O~GP,

an

enabled

ALB

Purpose

Arithmetic

each

having a storage

the

data

B7

determines

14

determines

is

taken

of

the

ALU. The

on

the

M-Register

M~ALB

to

permit

lines.

and

M-Register

ROM---....DB

eight

(GP)

and Main (M) Registers

(GP)

and

Logic Unit

bus

to

either

which

whether

from

a G

processed

ALF

output

command

the

data

stored

output

commands

Main

(M)

(socket

capability

a G

of

the

sixteen

the

information

or

an H register

lines.
is

is

The

coupled

decoded

in

is

are

Registers

12). The
of

sixteen

or

an H register.

individual

will

on

information

storage

back

through a multiplexer

from

the

a ROM

M-Register

multiplexed

all

high.

(socket

11)

GP-Register

8-bit

words.

The

registers

be

stored

the

eight

ALB

from

the ALU

capability

instruction

to

be

onto

the

data

are

used

consists

Information

status

in

will

a G

of

accept

lines

is

transferred

of

the

M-Register

to

word,

transferred

bus

when

in

conjunction

of

the

G and H

ROM

bits

the

or

an H register.

and

applied

the

ALB

the

multiplexer

to

the

the

DB------M,

is

trans-

B4

data.

to

to

the

is

one

lines.

ALU

8-

on

Another

the

from

provide

4.2.5 Arithmetic Logic

The

used

D B
decoded
commands
by

the

ROM

4.3 BUFFER

Two
printed
with
port.

regulate
and

buffer

PWA.
clocked
two-phase
running
onto

multiplexer

data

bus.

a ROM

the

constant.

Arithmetic

by

the

system.

lines

or

to

produce

select

eight

bits

are

Buffer

I/O

wiring

the

Read/Write

Commands

the

the

data

timing,

Information

into a

clock

status

the

data

This

multiplexer

word.

Logic Unit

from

the

the

the

ALF

lines.

also

decoded

I/O

AND

(sockets

assemblies

and
bidirectional
bus.

Circulating

phase

from

256-bit

circuitry

circuitry

bus

through

provi

ROM

des

the

bits

B4

Unit

(ALU)

(socket

The

device

GP-Register

ALU

operation

means

is

enabled

through

12)

accepts

or

ALU function. The

to

produce

BUFFER CONTROL

13

and

15)

and

provide

magnetic

clock

commands,

flow

detection,

the

shift

register

located

is

also

two

data

temporary

tape

transport

of

information

buffer

and

bus

storage

status

is

for

on

each

provided.

multiplexers.

to

transfer

by a

ROM.-.D B command

Bll

are

performs

8-bits

of
M-Register
commands

output

the

BRANCH

of

associated

system

and

decoded

between

for

indications

applied

storage.

Buffer

Information

then

all

of

data

on

SO,

the

command

Buffer

the

from

up

to

to

the

The

I/O

an

8-bit

transferred

the

arithmetic

directly

the

ALB

SI,

S2, S3, Ci,

ALU

is

Control

storage.

other

with

ROM

the

respective

256

eight-bit

are

provided

bits

input of a
clocking

PWA.

is

shifted

constant

to

from

lines.

coupled

used

in

(sockets
One
the

Read

by

Buffer

characters,

on

multiplexer

is

accomplished

Phase

detection

out

stored

which

the

and

the

ROM
and

to

ROM

pair

Buffer

each

of

the

in ROM

is

decoded

data

bus

logic

functions

data

bus

bits

are

ALM.

the

M-Register

addressing.

14 and 16)

is

associated

Only

trans-

Control

I/O

PWA

plus

Buffer

and

by

and

shift

registers

to

on

the

These

gating,

I/O

then

the

buffer

to

4-8

2441-1

4.4 TAPE CONTROL

There
Read/Write
port
Serial
transferred
tion

(BI~READ)

ROJ2)

to

Various
cassette

Transport

Data

flip-flops

4.5 WRITE ENCODE

There
Read/Write
main

(BI~REC).

Control
PWA

data

are

(socket

information

is

not

PWA's

the

associated

transport

bus

is

purpose

PWA

(socket

ready

two

Tape

magnetic

20).

Both

through

used

during

from

either

is

buffered

Read

status

in

place

control

(CIN),

commands,

information

on

the

PWA.

one

Write

magnetic

is

to

This

processed

(socket

R/WJ2).

(WDR)

command

Control

tape

(BI~REC)

the

printed

transport

perform

from

PWA

to

identical

the

operations

the

Tape

and

Read/Write

transferred

Decode PWA.

conditions

rewind

used

Encode

tape

convert

key

i.

e.

in

conjunction

printed

transport

parallel

serial

17)

where

The

least

goes

it

true,

wiring

(socket

assemblies.

17)

and

functions,

the

Write

Tape

with

Encode

Read/Write

the

Read

Only

(socket

through

are

detected

depressed

by

(KREW) ,

FAST, RUN, CCW,

with

block

wiring

data

data

is

significant

assembly

in

either

from

is

applied

inverted

the

write

the

the

and

bit

(DB~)

cycle

One

the

other

therefore,

PWA

(socket

PWA

transport.

R/WJ2)

the

appropriate

this

PWA,
etc.

etc.

address

(socket

single

data

to

the

or

bus

input

into

transferred

is

written

begins.

is

associated

with

both

19)

(socket

or

Tape

i.

e.

are

also

displays

19)

associated

dual

station

bi-phase

of

the

to

the

first.

the

Read

are

interchangeable.

is

buffered

R/WJ2).

Serial

information

Read Only

Tape

Control

tape

at

developed.

is

latched

system.

Read/Write

Tape

When

with

the

Only

trans-

and

This

(socket

PWA

speed

(TAS),

into

with

the

Its

serial

data

Tape

Read/Write

the

write

func-

Clock

flop

4.6 READ ENCODE

There

Read/Write
port
Bi-phase
is
ulo

is
plete

for

is

simply
etc.

timing

and

are

the

two

for

modulo

magnetic

(socket

21).

serial

put

onto the

225

counter

low. Since a

the

cycle

half

as

long

equivalent

to

continues

Refer

to

the

Read

data

data

is

"0"

at a count

as

approximately

to

Figure

2441-1

serializer

10

counter.

Decode

tape

Both

(BI~READ)

bus

used.

remains

it

is

count

printed

transport

perform

for

processing.

It

counts

high

of

approximately

low,

therefore,

down

4-7.

shift

wiring

identical

read

up

for

+215,

as

the

register

(socket

functions,

from

To
when
twice

the

since

count

is

derived

assemblies.

18)

and

the
therefore,

the

tape

is

differentiate

the

input

is

as

long

as

40.

A"l"

resultant

the

counter

passes

through

from

other

One

CA

is

with

converted

between a "0"

high

and

it

is

low,

on

the

other

count

does

is

approximately

not

zero,

time

through a flip-

associated

the

Read

both

are

into

parallel

or

down

when

the

counter

hand,

count

negatively.

e.

g.

1,

with

the

Only

trans-

interchangeable.

data

which

"1", a mod-

the

input

will

com-

remains

-40.

high

This

It

0, 255, 254,

4-9

"0"

+80 - 40 = + 40

count

"1

"

Whenever
is a "1".
register

goes

low.

A

digital

provide

kIIk!'=---

1+40

the

This

whose

filter

the

reverse

.....

count

count

data
outputs

provides

, +80

count

lott<---

Figure

is

less

output

are

noise

read

capability

----)l~

-80

than

+127

is

serially

gated

immunity

count

4-7.

onto

when

-40

countl

------'>I~

Bi-Phase

the

data

shifted

the

data

for

the

into

the

tape

4.7 TAPE READ/WRITE AND TAPE READ ONLY

There
located
other
identical

write
circuitry

are

two

just

behind

is

located

functions,

circuitry,

is

not

Tape

just

as

used

printed

the

Read/Write

behind

therefore,

well

as

during

wiring

the

Read

both

transport

operation

assemblies
magnetic

Only

transport

are

interchangeable.

command

with

the

tape

+40 - 80 = - 40

Serial

is a "0",

bus

tape-to-circuit

associated

transport

and

Read

Data

and

an

8-bit

whenever

is

driven

in

socket

status

Only

count

when

serial-to-parallel

by

with

in

Each

logic

transport.

greater

the

RR---..DB

interface.

the

the

socket

ROJ2.

provides
circuitry.

reverse

system.

R/WJ2

Both

(+215)

than

+127

shift

command

Circuits
routine.

One

and

perform

the

read

The

it

also

is

the

and

write

4.8 MOTOR CONTROL

There

One

other

vides

Figure

drive

R/W

from

level.
magnitude

her

the

wise

used
to

The
the
five,

4-10

are

is

located

is

located

servo

4-8

commands

servo

the

Tape

The

with

the

inverting

motor
to

drive

either

driver

driver

remaining

the

drive

two

Motor

just

behind

just

control

illustrates

loop

polarity

determines

tachometer

amplifier

driver

the

amplifier

for

(CCW RUN,

from

Read

amplifier

counterclockwise

amplifier

20

percent

current

Control

behind

Only PWA.
of

will

the

its

the

servo

the

Tape

this

the

speed

feedback

(A).

goes

remain

of

is

shut

printed

R/W

the

RO

respective

CW

Read/Write

reference

The
(DCW). Once

positive,

the

off,

wiring
magnetic
magnetic

loop

configured

RUN,

These

at

which

signal

inverted

motor

on

during

cycle

permitting

assemblies

tape
tape

transport,

FAST

commands

determines

to

or

CCW,

PW A or

it

will

provide

output

this

driver

current

80

percent

approximately

the

associated
transport
transport

as

well

about

or

in

cause a particular

which

run.

the

from

output

amplifier

is

a.pplied

motor

in
in

as

servo

each

motor.

FAST

the

case

motor

This

reference

servo

the

amplifier

has

aga.in

(DCCW). When

to

of

the

one

millisecond

to

operate

socket

socket

CW)

of

will

error

been

the

Main

with

the

system.

R/WJ1

ROJ!.

status

As

are

the

RO

drive

be

driven,

is

signal

drives

inverted,

respective

Clock

as a tachometer.

and

Each

indications.

can

be

seen,

applied

summed

cycle.

out

to

servo

reference

while

which

the

the

motor.

of

every

clock-

input

the

pro-

the

loop

the

toget-

drives

it

is

During

2441-1

H::.

I

.....

.....

I_C

____ . __

_

CIN

lAS

HIGH

GAIN

CCW

RUN

cw

RUN

fAST

CCW

REF

FAST

CW

OSC

--'--I4ms~

MAIN CLOCK

u-u-u-

---..j

1---"1

ms

~~~~~~RETER

~

PULSE

~f--O.1Sms

+ V ref

lAS

T

BIPOLAR

THRESHOLD

DETECTOR

- V ref

SLACK

DRIVE

SERVO

DISABLE

SERVO UNSAFE

OR

MAIN CLOCK

SAMPLER TACHOMETER PULSE

TAPE

READ/WRITE

(R!WJ2j OR TAPE

READ

ONLY

(ROJ2)

----:M~OTOR

CONTROL

(R!WJ11

OR

ROJ11

,,;......;---

r

~-----~T-

SAMPLE

AND

HOLD

CIRCUITS

ccw MOTOR

u::.::=

OV-

fYFRVOLlAGE

__

~ACURRENT

-I

I--

SAMPLING

TIME

Figure

4-8.

Motor

Control

Block

Diagram

A la,rge
tance

remains

20

The
millisecond
once
and
and
generators

speed
and
the
tachometer
generator

4.9 KEYBOARD INTERFACE

The
tween
keyboard
DBX--+DB
bus.

back

when

operated

is

the

percent

time

switched

again

applied
amplified
hold output

(lr). The

(TAS).

deactivate

driver

amplifier

to

Keyboard

the

keyboard

to

When

voltage

back

period,

path

is

the

capacitor

to

to

provide

also

This

circuit

at

approximately

feedback

the

non-driven

Interface

and

the

input of a
command
the

DBX---.DB

will

appear

in

this

emf

of

the

closed

is

the

motor.

the

supplies

bipolar

is

to

the

non-driven

signal

(socket

the

data

bidirectional

which

command

the

across

manner.

motor

voltage

by

the

allowed

The output of

servo

drive

threshold
set

to

25

from

the

motor

3)
bus.

permits

the
Once
which

is

applied

Sampler

to

charge.

error

to

signal

the

detector

activate

percent

motor

driven

to

regulate

controls

The

multiplexer.

the

transfer

is

not

terminals

this

voltage

is

proportional

to

the

Tachometer

At

the

to

bipolar

threshold

is

at

approximately

of final

to

provide

motor

tape

the

bidirectional

eight

DBX

of

present,

of

the

has

respective

Pulse

the

end of

sample

complete

used

to

speed.

some

is

applied

tension.

lines
This

keyboard

information

motor
settled
to

this

and hold

the

detector

indicate

Current

tension

its

speed.

sample

and in

servo

75

percent

due

to

out, the

and

the

period,

circuit

loop. The

and

that

is

switched

on

through a reverse

transfer

carry

multiplexer

of

information

is

information

flow

is

its

self-induc-

voltage

During

last

hold

0.15

this

circuit.

current

is

filtered

sample

reverse

the

of final

tape

current

is

speed

through

the

tape.

current

information

from

enabled

to

by a

the data,

reversed.

that

is

at

The

be-

the

The

eight
provides
are

used

Various

are

detected

4.10 PRINTER INTERFACE

The

Printer
the

data

wheel

interface.
transmit
which

(in

multiples

number

(in

multiples

Various
are

detected

low

order

the

buffered

throughout

keyboard

on

this

Interface

bus

to

the

(character),

These

either

specifies

of

printer

the
the

of

1/60

vertical

of

1/48

commands

on

this

bits

from

bit

and

the

system

commands

PWA.

(socket 1)

printer.

and

paper

controls

7-bit

ASCII code

direction

of

an

line

spaces

of

an

PWA.

ROM

its

are

Each

feed,

are

sent

and

inch),

inch).

are

(R0'

through

complement

to

control

decoded

controls

of

the

printer's

are

controlled

down

for

the
number
or

an

11-bit

(indexes)

decoded

that

from

R7)

(B0'

through

the

various

from

the

the

of

ROM

unidirectional

eleven

next

character

printing

word

the

paper

ROM

are

operations.

bits

three

by

the

data

spaces

which

is

bits

buffered

B7 and m

and

keyboard

transfer

basic

motions:
system
lines

(DL0'-10). The

to

be

to

be
specifies
to

be

moved

and

printer

on

this
through

status

of

information

through

printed,

moved

the

direction

by

status

PWA.

137)

conditions

carrier,

the

printer

an

ll-bit

by

the

the

paper

conditions

This

which

print

data

carrier

and

from

lines
word

feed

4-12

2441-1

4.11 MISCELLANEOUS, CLOCK AND

The

Miscellaneoust Clockt and
8-phase
clock

flops

The
timing

system

is

comprised

used

divided

of

the

to

divide

output

various

clockt ROM

of

the

produces

a 4MHz (250 ns)

output

system

IC

bit

bufferingt and

frequency

the

basic 2 microsecond

operations.

IC

printed

wiring

crystal-controlled

into

its

assembly

system

eight

(socket

status

oscillator

phases.

machine

4)

storage.

See

Figure

cycle

provides

The

and

four

used

to

the

system

flip-

4-9.

control

the

Buffering
PWA.

through

System
command
provided

4.12 DISPLAY PANEL

A

printed

Its

purpose
drive
then

4.13

The

de

systemt are

developed
main

load

additiont the
tion

for

+24V

supply

in

the

voltages

PWA

assembly.
+15 ±
supply

of

the

This

provides

lIT5)

which

statust such

(SPADDER)

to

determine

wiring

is

for

the

block

stored

DC

in

POWER

power

supplies,

located

from

voltages

protection

+24Vand

the

+11 V supply

supply

to

is

develop

development

are

distributed

are

then

The

O.

75Vt +5.12

is

the

only

eight

are

assembly

to

convert

address

registers

SUPPLIES

the

three

(+24V,

for

all

used

throughout

the

of

coupled

voltages

±

supply

high

order

the

buffered

used

as

IC

"ST

t

is

decoded

which

is

the

display,

on

the

which

in

the

lower

main

+l1Vt and

supplies

-22.

5V

is

provided

regulated

the

regulated

to

the

to

the

developed

O.

05Vt -5

that

bits

from

bit

and

throughout

and

t

'S1'is

from

transport

associated

modified

8-bit

These

associated

are

used

portion

secondary

-22.

5V)

is

provided

supplies

by

the

system.

+15V

and

-5Vt -9V,

DC

Regulator

power

output
and

±

O.

25Vt -9

requires

ROM

its

complement

the

system

latched

ROM

bits

is

the

active

and

located

ASCII

8-bits

Tape

to

furnish

of

the

windings

are

full-wave

by

are

each

the

dual-section

It

+5V

supplies.

PWA. The

stages

used

throughout

±

an

adjustment.

(R8

to

into

on

this
reader.

code

are

Control

all

console.

of

the

main

fused

is

also

and

-15V

which

O.

45V,

through

R15)

(B8

control

flip-flops

PWA. A

with

each

for

the

transferred

PWA.

of

the

dc

All

of

transformer

rectified

circuit

at

15

amperes.

circuit

used

in

The

-22.

supplies.

regulated

are

located

the

system

and

-15

is

perfomed

through
the

various

and

the

B15

flip-flop

block

block

address

address

from

power

the

for

voltages

Tl.

and

filtered.

breaker

breaker

conjunction

5V

supply

These

outputs

on

the

are

±

O.

75V.

on

this

and

B8

operations.

special

is

address

also

display.

to

BCD

the

data

the

complete

used

are

These

three
Over-

CBl.
Further

CBl.

with

is

three

from

heat

In

protec-

The

the

only

main

this

sink

+24 ± 2. 6V,

The

+5.12V

bust

+11 V

used

2441-1

4-13

CLOCK

(4MHz)

CB

CC

CD

Cl0

(CB·CC)

__

____

______

-----'

----'

---'

---'

Cll

(CC·CD)

(CA-CD)

(CA·CB)

(CB·CC)

(CC·CD)

(CA·CD) ...

____

Cl2

______

Cl3

________

Cl4

__________

CL5

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

CL6l

---'

_____________

n

.....

....

_____________

n

---'

.....

'--

____________

n

....

______________

....

....

---'

.....

Cl7

(CA·CB) .

J

I"

4-14

SYSTEM

CYCLE

(2tl.s)

Figure

4-9.

System

"I

Clock

Timing

2441-1

5.1

SAFETY PRECAUTIONS

CHAPTER 5

MAINTENANCE

Maintenance
themselves

5.2 MAINTENANCE PHILOSOPHY

5.2.1

The

Objectives

prime
availability
can

assist

equipment

personnel

or

damage

•

Keep
is

on.

•

Use
returns

•

Potentials

is

applied.

•

Avoid
transport.
on

them

•

Wear

objective

to

the

customer.

greatly

in

utilization.

should

to

the

fingers,

care

when

at a very

touching

can

safety

of

any

achieving

use

equipment:

hands,

working

up

to

115 Vac

or

Acids

cause

glasses

maintenance

A

this

the

following

or

other

on

an

high

speed

are

blowing
from

on

the

condensation

when

applicable.

activity

preventive

objective,

safety

objects

operating

and

it

can

present

the

skin

inside

read/write

can

etch

deposits

is

to

maintenance

but

it

is

precautions

out

of

the

printer

printer.

Remember,

inflict a serious

the

console

or

read

and

ruin

these

which

provide

will

maximum

program,

pointless

if

it

to

prevent

while

injury.

anytime

only

heads

heads.

disfigure

equipment

properly

fails

injury

the

the

head

applied,

to

increase

to

power

carrier

power

in

the

Breathing

surfaces.

5.2.2

The

electromechanical

Visual
Most
long
ception

Basic

Considerations

three

fundamental

observation

mechanical

before

of

the

the

equipment

is

equipment

actual

Service

NOTE:

considerations

the

failure

Engineer

mended
equipment
torily.
ment
failure.

2441-1

are:

Service

failures

occurs.

Do

not

in

in

INSPECT

Engineer's

will

It

to

detect

perform

preventive

that

Also,

an

attempt

preventive

- CLEAN -

most

have

given

is,

therefore,

these

more

failures

than

maintenance

is

operating

do

not

disassemble

to

locate a potential

maintenance

LUBRICATE.

valuable

visual

preventive

indication

left

to

before

the

recom-

on

satisfac-

equip-

of

the

awareness

they

mechanical

maintenance

of

their

occur.

or

tool.
presence
and

per-

5-1

5.3 TOOLS AND SERVICING AIDS

This

section

the

system.

ordering

lists

those

Refer

to

information.

special

the

parts

single-purpose
catalog

tools

and

for a complete

list

test

equipment

of

recommended

used

for

tools

servicing

and

5.3.1

The

Tools

following

maintaining

5.3.2

The

for

Digital

A

test
meter
accuracy

Test

following

servicing

Multimeter

Weston

equipment

selected

Model 4440

specifications:

is a listing

the

system:

Extender
Card
Speed
E-Z

Extractor

setting

Hook

Standard
Alcohol

Lint

free

Equipment

defines

and

troubleshooting.

required

should

Card

DMM

Xerox

90%

Isopropyl

Q-tips

both

(DMM)

Digital

be

of

all

with

Ground

Cassette

leads

tool

kit

the

standard

Multimeter

for

servicing.

of

sufficient

special

1600

single-purpose

Plane

FCPI

1.

and

special

or

an

equivalent

DMM

quality

requirements

to

meet

tools

Cassette,
ment
Motor

Tool

C.

Clip

Flush

cutting

(Hunter

Positioning

Tools
Soldapullt
Scratch

cassette

purpose

is

the

following

required

Motor,

PiN

for

and

88016036

Insert

pliers

45·

No. A TIAEL)

(Desoldering

test

equipment

the

only

item

are

not

critical,

minimum

servicing

Sensor

pIN

tool)

required·

of

standard

but
range

and

Adjust-

70015833

the

and

AC

199.

1.

19.

199.
999V ± 0.5%

DC

199.

1.

19.

199.
999

5-2

9 m V ±

999

V ±

99 V ±

9 V ±

9 m V ±

999

V ±

99

V ±

9 V ±

V ±

0.5%

0.5%

O.

O.

O.

O.

0.3%

O.

5%

O.

3%
3%
3%

5%

3%

10

10

10

10

10

50
500

10

10

10

MQ
MQ
MQ
MQ
MQ

MQ

MQ

MQ

MQ

MQ

input
input
input
input
input

input

input
input
input

input

impedance
impedance
impedance
impedance
impedance

impedance

impedance
impedance
impedance
impedance

2441-1

Resistance

199.

1.

999

19.

99

199.9

1.

999

9 Q ±

0.5%
KQ ± 0.5%
KQ ± O.
KQ ± 0.5%
MQ ± O.

5%

5%

Programmed

A

special

a

compact,

peripherals.

system

The
vides
tines,
to

check
One
sixteen

operations

substituted

tions.
be

diagnosed
processor
are

tested.
control
system

diagnosed
are

performed

purpose

interfacing

self-contained

the

means

stored

data

by

one,

Major-Page

Through

commands
buffers

Diagnostic

test

stored-program

It

is

designed

and

unit,

by

which

in

the

read

flow

within

the

contents

checks

have

been

established,

to

exercise

the

use

to a single

has

been

ascertained,

The

printer

while

and

the

by

the

PDA.

through

Aid

(PDA)

unit,

the

Programmed

diagnostic

to

plug

directly

DC

power

through

the
only
the
of

each

Signifies a defective

the

Microprocessor

of

this

PWA,

is

tested

the

magnetic

Some

the

use

for

its

integrity

memory

system.

Major-Page

the

technique, a malfunction
in

nearly

the

for

keyboard

tape

service

of

the

unit

used

into

the

PDA

array

various

of

of

the

portion

These

program

through

all

cases.

correct

is

tested

transports

adjustments

PDA's

Diagnostic

to

service

sockets

are

provided
front
system

diagnostic

panel

of

the

routines

is

checked.

system

stored

all

Once

peripherals

character

for

proper

are

required

Aid

27

switches

can

be

PDA,

begin

ROM.

in

the

of

its

within

the

attached

printing

also

tested

routines.

(PDA) P

the

Microprocessor

and

28

of

through

and

verified.

permit

by

Failure

PDA's

character

by

the

testing

to

Once

arithmetic

the

Microprocessor

integrity

to

and

and

the

various

/N

00015500

the

card

these

1K

connections.

indicators,

Diagnostic

Service

the

system

pass

anyone

proper

of

it

via

its

coding.

malfunctions

system

of

ROM

and

logic

the

Micro-

the

response

peripherals

is

and

its

cage.

pro-

rou-

Engineer

ROM.

of

ROM

can

be

func-

can

data

bus

to

The

two

are

All

the

PDA

Controls

The

function

graphs.

CD

2441-1

and

Indicators

of

each

front

Refer

to

Figure

DISPLA

played

When
is
module
through
displayed

When
by
display
through 7 display

When
the

Y -

three-position

by

the

set

to

ROM DATA,

displayed.

address

15).
by

set

to

ADDR

the

Data/Address

the

K-Page

set

to

MAIN

Data/Address

the

panel

5-1

MODULE

The

The

control

for

four

are

displayed

twelve

Data/Address

REG,

Bit

address, 8 and 9 display

the

address

REG,

Bit

Indi

and

the

location

toggle

ADDRESS

the

state

upper

order

by

low

order

Bit

the

state

Indicators

of

the

state

cators

indicator

of

each.

switch

and/or

of

each

bits

the

MODULE ADDRESS

bits

Indicators

of

each

(0

the

individual

of

each

(0

through

is

described

used

to

Data/Address

bit

in

(B12

through

(BO

through

(0

bit

in

through

bit

11).

the

word

on

7).

in

select

the

through
the

Major-Page

the

the

Bit

16-bit

B15)

B11)

11).

12-bit

Bit

Indicators

stored

data

Bit
that

bus

the

following

type

of

data

Indicators.

instruction

that

form

Indicators

supply

address

address,

in

is

is

10

the

Major

displayed

para-

dis-

word

the

(12

data

are

displayed
and

11

and

0

Page.

by

5-3

11

10

13

OAT

AI

ADDRESS

REGISTER

101876543210

00000000000

~OD~~E~~--~-~-~-

1

~

DI@AY~-~

15 14

13

12

ADDRESS

o 0 0

REGISTER

-

ROM

DATA

-

ADDR

lIEG

OP

ROM

- MAIN

REG

END

TEST

CHECK

STOP

000

Test

-

~t;tC<t~E

MODE

-

RUN

-

LOOP

Figure

5-1.

PDA Controls and Indicators

RESET -pushbutton

used

to

reset

the

circuits

of

the

PDA

only.

LAMP

inate.

TEST

MODE
When

able

all

since

When

goes

positive

® Mode -

When
one

instruction

When

PDA's

STOP
When

the

START

this

operation.

TEST -pushbutton

MODE -

of

set

4K of

the
set

three-position

set

set

memory,

pushbutton

set

two-position

operation.
to

TEST

PDA ROM

to

TEST

to SINGLE

to RUN,

to

LOOP,

pushbutton

MODE,

system

MODE

to

enable

at a time,

the

once

stops

ROM.

becomes

CYCLE,

the

the

used

toggle

the

during

the

system

toggle

for

system

START

the

execution

system

is

depressed.

to

initially

switch

+ENABLE

This

allows

operational

a ROM

ROM

switch

the

each

will

used

system

depression

execute

pushbutton

of

will

execute

Depressing

ensure

used

SYS

the

at

this

Test,

to

function.

to

set

will

all

instructions.

and

that

to

set

ROM

PDA

to

time.

the

+ENABLE

the

execute

of

the

of

the

is

depressed.

repeat a specific

the

all

the

signal

exercise

mode

the

START

routines

STOP

PDA

lamps

PDA into

goes

negative

the

SYS

of

operation.

PDA's

routines

pushbutton.

stored

Depressing

pushbutton

illum-

the

TEST

system,

ROM

in

routine

to

dis-

signal

the

the

once

stops

SET

ADDRESS REGISTER ­command
directly
the

address
system
tarily
is

depressed

On

the

routine.

TEST

STOP -pushbutton
signal
prevents

START -pushbutton

for

each
Mode
depressed

Status

an

external

enter a given

of

the

desired

must

placed

second

ROM -

is

switch

Indicators -four

be

reset

to

its

the

operation

cycle,

pushbutton

generated

the

next

absolute

instruction

is

set

once

to

address

routine

before

up

position,

operation

used

to

to

inhibit

used

when

to

either

initiate

lamps

momentary

within

routine

the

will

used

to

stop

the

address

to

initiate

the

Mode

RUN

the

operation.

branching

the

is

set

SET

ADDRESS REGISTER

then

released.

branch

will

be

command

system

system

from

an

switch

or

LOOP,

used

to

display

center-off

operation.

PDA's

by

to

address

shifted

operations.

Address
being

operation.

stored

the

Address

to

the

ROM

transferred.

is

set

the

test

toggle

When

009

the

Test.

Register

It

to

SINGLE CYCLE. When

START

status.

switch

When

address

When

it

diagnostic

Bit

the

START

on

the

depressed, a stop

must

switch

used

is

desired

program,

Switche.s.

switch

pushbutton

first

clock

of

the

(socket

be

depressed

need

is

9).

to

to

The

momen-

cycle.

desired

This

only

be

once

the

2441-1

5-5

OP
for

END -

the

selected

used

during

major

the

page

ROM

has

Test

ended.

to

indicate

that

the

ROM

test

operation

®

@

@

ROM
ROM
lamp

CHECK ­STOP -used

inhibit
takes
visually

MODULE ADDRESS -

module

Address

set a 12-bit

switches
a

Datal

data
lamps
while a "0"

TEST -used
Test
are

not

used

the

approximately

detectable.

address

Bit

to

"1"

will

be

Address

or

address

to

aid

to

takes

advancing

approximately

visually

to

indicate

to

indicate

portion

Switches -

address.

aid

in

hex

set,

while a "0"

Bit

Indicators -twelve

bits.

in

hex

is

indicated

indicate

detectable.

that a malfunction

that a -CLOCK

of

the

system

500

J,ts,

the

four

lamps

(upper

twelve

The

binary

conversion.

The

binary

conversion.

when

that a ROM

500

J,ts,

the

STOP

Address

on-to-off-to-on

used

to

order

two-position

will

it

four

weight

When a

be

set

lamps

weight

When a

is

extinguished.

Test

display

bits)

is

in

is

lamp

is

in

off-to-on-to-off

was

detected.

signal

Register.

states

the

of

the

toggle
shown above

switch

its

used

shown below

switches

is

down pOSition.

to

illuminates

progress.

has

been
Since
of

this

state

of

16-bit

each

placed

display

each

a"l"

Since

states

instruction

used

to

the

of

generated

each

ROM

lamp

are

each

bit

to

manually

group

group

its

up

states

is

indicated,

of

of

each

this

to
Test
not

in

the

word.

four

position

of

either

four

5.4

POWER

5.4.1

DC
throughout

ified

measurement

5.4.2 Logic

The

follows:

Voltage

voltage

in

Table

high-low

High

the

Low

SUPPLY VOLTAGE

Use

An AC

sent
the
to

Levels

levels

Levels

of

system.

1-1

when

details.

logic

voltage

Level.

Level.

+24V, +15V, +11 V, +5V,

These

referenced

levels

care

voltage

in

the

POWER

off.

voltage

CAUTION

when

level

power

pushbutton

values

to

DC

used

in

probing

of

supply

-5V,

must

ground.

the

typewriter

. 2. 4V
.

O.

OV

power

115 Vac

section

is

depressed

-9V,

be

within

Refer

to

5.

OV

to

O.

8V (0. 22V

circuits.

is

pre-

when

-15V,
the

to

paragraph

and

console

(3: 3V

and

-22.

required

circuitry

typical)

typical)

5V

ranges

2.3.1

are

for

used

are

spec-

further

as

5-6

2441-1

5.4.3

Use

of

Test

Probes

When

the

use
For
sired

probing

of

the

majority

effect.

high

or

using

voltages

of

jumpers,

which

logic

could

circuit

ensure

that

cause

logic

damage

testing, a properly

modules

or

destroy

placed

are

not

overloaded.

semiconductor

ground

will

create

Avoid

devices.

the

de-

2441-1

5-7

6.1

GENERAL

The

Programmed
verifying
to

troubleshoot

this

test

system

unit:

Diagnostic

integrity,

the

system.

CHAPTER 6

CHECKS AND ADJUSTMENTS

Aid (PDA)

either

The following

at

the

is

designed

time

are

for

of

installation

those

diagnostic

use

by the

or

Service

whenever

routines

Engineer

there

performed

is a need

when

with

Each

of

through

each

routine

ther

expand

order

given

desired,

given. Once

routine

ROM

•

Branch

•

Branch

•

PDA

•

•

•

•

•

•

•

•

•

•

these
the

diagnostic

PDA's

verifies a specific

the

to

proceed

Test

G-Registers
H-Registers
ALU

Test

Buffers

Data

Bus

Data

Bus

Keyboard

Printer

Transports

internal

PDA's

all

exercise

as

Test

Test

on

Data

Test

Out
In

Te

Strobe

Test

Tests

routines

overall
tests

or

outlined

Test

Test
Test

Test

st

Test

is

accessable

program,

system

test
have
observe a specific

in

the

or

directly

function

capabilities,

been

performed,

note

provided

in one of two

through

and

the

it

function

in

PDA

each

verified

routines

may

be

or

paragraph

manners;

manual

must
desired

to

make

6.2

sequentially

addressing.

function

be

performed

to

directly

an

adjustment.

step

8.

is

used

enter

in

Since

to

fur-

the

If

a

so

The

paragraphs
tested.
from

ulation

Transport

6.2 PDA INSTALLATION

Use

2441-1

In

test

to

is

at a minimum

the

follOWing

1.

2.

actual

test

Tests.

Remove

the

Lift

Ensure

which

automatically

follow

practice,

and

procedure

the

lower

it

up

that

edge

and

describe

the

Service

by

depressing

required

to

install

right-hand

of the

away

from

the

POWER

each

Engineer

only

the

side

panel

the

switch

operation

only

during

PDA:

access

and

pulling

frame.

on

will

the

the

panel

the

as

if

it

simply

START

PDA

Test,

from

it

away

console

is

going

install

pushbutton.

the
from

is

set

to

the

Data

Bus

console

the

to

OFF.

be

independently

PDA

and

PDA

In

Test,

by

grasping

frame

structure.

progress

manip-

and

6-1

3.

Set

the

following

switches

to

the

indicated

position:

4.

Install

Figure

5.

Set

. NOTE:

6.

Depress

illuminate.

7.

Depress

sounds,
the
shown
type

TEST
Mode.
DISPLAY.
All

Address

the

PDA

6-1.

the

POWE R

'Ibe

the

and

depress

system

in

Figure

and

will

MODE.

into

switch

STOP

LAMP

relea.se

and

and

zero

6-1,

spring

Bit

Switches

sockets

on the

lamp

TEST

the
release

the

is

back

27

and

console

will

be

pushbutton

START

pushbutton.

the

ROM

Address

located

when

on

relea.sed.

down

RUN

ADDR REG

"J1"

28

of

the

to

ON.

illuminated

and

verify

system

the

RESET
Register
ca,rd

(OFF)

state

card

•

that

After

cage.

position

(down
cage,

toggle

(socket

position)

as

all

PDA

the

system
switch

9).

It

is a momenta.ry

shown

lamps

buzzer

to

'Ibis

in

reset

switch,

6-2

PWA27

028

Figure

6-1.

~::'-_~"""lI--RESfT

CAROCAGE

PDA

Installation

2441-1

8.

Perform

each

of

the

tests

in

the

order

outlined

in

the

following

paragraphs.

NOTE:

a.

b.

c.

If

a

failure

anyone

to

directly

in

which

following

those
also
for

tests

be

testing,
purposes
port

Tests:

Set

the

following

TEST

MODE.
Mode.
DISPLAY.
All

Address

Momentarily,
card

cage

and

hex

address

Set

the

Address

of

the

routine
end

address"

addresses"

is

detected

of

these

enter

the

failure

procedure

successfully

used

to

troubleshooting

such

as

switches

Bit

Switches.

depress

observe

.0.0.0.

Bit

Switches

to

be

entered.

for

each

for

each

tests,

or

return

was

may

directly

in

the

and
that

routine

routine

while

it

may

detected.

be

passed.

enter

case

to

the

release

the

to

The

is

are

performing

be

desired

to

the

routine

used

to

It

any

routine

or

adjustment

of

the

indicated

up

(TEST

SINGLE

ADDR REG

".0"

state

the

Datal

Address

the

desired

hex

"starting

listed

listed

The

skip
may

Trans-

position:

MODE)

CYCLE

(down

position)

RESE T toggle

Bit

Indicators

hex

"starting
address"

in

in

Table

Table

6-1.

6-2.

switch

address"
and

The

on

display

"test

"error

the

d.

e.

f.

g.

Momentarily,

position,

Depress

Datal
Depress

Datal
address.

Set

Address

Address

the

Mode

and

and

T1

place

release

Bit

Indicators

release

Bit

Indicators

switch

the

the

the

to

SET

START

START

the

position

ADDRESS

pushbutton

display

hex

pushbutton

display

the

specified

REGISTER

and

observe

address

and

observe

desired

in

hex

each

switch

that

~~9.

that

"starting

test.

to

its

the

the

up

2441-1

6-3

TEST

Table

6-1

ROUTINE

·

PDA

Routine

Addresses

STARTING

ADDRESS

TEST

END

ADDRESS

1 ROM

2
3
4
5
6

7
8
9

10
11
12
13

Branch
Branch
PDA
G-Registers
H-Registers
ALU
Buffers
Data
Data
Keyboard
Printer
Transport

a..

b.

Test

Test

Test

Bus
Bus

Run
Run

Test

on

Data

Test

Test

Test

Out

In

Test

Strobe

Test

Tests

Forward

Reverse

Test

Test

Test

Normal

Normal

~~~

~19

~48

~5~

~AF

0'E6

~13

~F7

~4F

~AE

0'E4

1BB
1BC 272
281

290
296

3A0

2C0
2C4

28F

295

2D9

3B1

2F4

2F4
c.
d.

e.

f.

Run

Forward

Run

Reverse

Speed

Normal

Test

Write

Fast

Fast

Forward

2C8
2CC
34E
320'

2F4
2F4
3FC
2F4

6-4

2441-1

Table

6-2.

Error

Addresses

TEST

1
2

3

4
5
6

7

8

ROUTINE

ROM
Branch
Branch

PDA

Test

Test
on

Test

G-Registers
H-Registers
ALU

Test

Buffers
a.

Read

Test

Only

Data

Test
Test

Test

ERROR

~~2

~lB

~2A

~3A

~4E

~5A

~B9

~ED

~FA

1~9

11D
13F

16F
192

1BE
1D8

2~5 2~9

~~4

~lE

~2D

~3D

~6E

~EF

~FC

l~F

12E
145
176
19A 1A4

1CA
1E2

ADDRESS

---

~21

~31

~41

~86

~F2

1~2

114 116
132
15A
17C

1C8
1EB
212

~24

~34

~44 ~47

~F3

1~5

136
164
185
lAC

1CD
1F6

~27

~37

~F5

1~7

11A
13A
166
18A
1B5

1D5
1FB

9
10
11
12
13

*These
2441-1

"error

b.

Read/Write

Data

Bus

Data

Bus

Keyboard

Printer
Transport

Run

a.

b.

Run

c.

Run

d.

Run
Speed

e.

f.

Normal

addresses"

Out

Test

In

Test

Strobe

Test

Tests
Forward
Reverse
Forward
Reverse

Write

are

Test

Normal

Normal

Fast

Fast

Forward

common

to

Transport

216
232
259

VISUAL
VISUAL
VISUAL (2D9
VISUAL

2D3*
2D3*
2D3*
2D3*

21E
23B
263

(illuminating

(block

plus

(printout)

2ED*
2ED*
2ED*
2ED*

AUDIO-VISUAL

~~F

2F7*

2D3*
34D

3F8*

Tests

a,

b,

223 228
243

251 257

26C

keys)

address

displays)

CHECK

2F7*
2F7*
3DA*
3DA*

3DA*
3DA*
3F8*
3F8*

2ED*
3DA*

c,

d,

and

22D

lamp)

3F8*
3F8*

f.

See

Table 6 ...

6-5

9.

6.3

ROM

The

purpose

ROM.

be

Each

detected

occurs,
correctly.

TEST

during

the

defective

Perform

1.

2.

of

the

ROM

of

the

16

Major-Pages

anyone

PWA

all

Install

the

Momentarily,

Test

is

to

of

these

is

simply

Major-Page

PDA

as

outlined

depress

verify

in

the

tests,

replaced

tests

and

the

contents

ROM

the

CHECK

and

as

follows:

in

paragraph

release

of

is

individually

lamp

the

test

6.2.

the

RESET

each

will

rerun

location

tested.

illuminate.

to

ensure

toggle

in the

Should a

When

that

SWitch on

system

failure

it

operates

the

card

this

cage.

NOTE:

3.

Set

the

TEST

4.

Set

the

Mode

5.

Perform

the

Address

or

"~"

state

set

the

address

The

remainder

(down

position)

eration

The

OP
CHECK
Major-Page
failure
must
that

was

be

it

functions
PWA, the CHECK
place
is
repeat

PWA 9

again

the

The

MODE

switch

each

of

Bit

(down

of

the

ROM

END

lamp

lamp

remains

test

detected,

replaced.

(ROM

not

solved,

test.

STOP

lamp

switch

to

the

Major-Page

Switches

position).

of

the

of

the

so

as

Address

will

may

Whenever

correctly

lamp

Address

replace

will

be

to

the

RUN.

indicated,

Address

K-Page,

switches

not

to

while

(0

interfere

Register.

illuminate

extinguished,

be

performed.

therefore,

a PWA

in

the

still

illuminates
Register)
PWA 4

illuminated.

up

(TEST

tests

outlined

to

either
Bit

Switches

8 and 9

through

with

7)
the

Depress

at

the

end

the

test

If

the

the

associated

is

replaced,

system.

If

each

and

repeat

(Miscellaneous,

MODE)

in

the

"1"

address

must

sequential

the

of

the

was

successful

CHECK

PWA,

after

time

the

position.

Table

6-3

state

10

and

the

Major-Page.

be

in

the

addressing

TEST

500

IJ.s

lamp

illuminates,

listed

rerun

the

replacing

the

test

test.

Clock,

by

(up

11

"(,1"

ROM

test.

and

in

test

the

is

If

and

setting

position)

manually

state

op-

pushbutton.

If

the

the

next

Table

to

ensure

indicated
rerun,
the

re-

problem

IC)

and

a

6-3,

NOTE:

6-6

Before
depress
switch

beginning

and

release

on

the

card

each

the

cage.

test,

RESET

momentarily

toggle

2441-1

TEST

11

Table

ADDRESS

6-3

10

·

BIT

ROM

Tests

SWITCH

9

DEFECTIVE

8

PWA

4

6

7

8

9

10

11

1

2

3

5

r;
r;

g

r;
r;
r;
r;

r;

1

1

1

r;

C)

r;
r;

1

1

1

1

f1

~

~

fJ

Cl

1

1

C)

C)

1

1

r;

~

1

Cl

1

r;

1

C)

1

r;

1

r;

1

~

5

5

5

5

6

6

6

6

7

7

7

12

13

14

15

16

6.4 BRANCH TEST

The

purpose
page
the

ROM
ROM
Clock

branch,

bit

and

of

the

and

Address

buffering

IC(socket

1.

Install
tests.

1

1

1

1

1

Branch

extra

page

Register

circuits

4)

PWA's

the

Test

branch

(socket

on

PDA

is

the

Keyboard

are

as

outlined

.tS

1

1

1

1

to

verify

and

return

9),

Return

exercised.

in

1

if
if

1

1

the

sequential,

capabilities

Address

Interface

Perform

paragraph

1

if

1

cj

1

Register

(socket

the

6.2

intra

page

of

the

(socket

3)

and

Branch
and

perform

branch,

system.

10),

the

Miscellaneous,

Test

as
all

7

8

8

8

8

extra

In

this

test

and

the

follows:

preceding

2441-1

6-7

2.

Momentarily,
cage.

3.

Set

the

following

depress

switches

and

release

to

the

the

RESET

indicated

toggle

position:

switch

on

the

card

NOTE:

4.

Momentarily,
that

the

Table

indicates

that

show,

If

the
repeat
does
all

12

(Miscellaneous,

NOTE: The

TEST

MODE..

..

up

(TEST MODE)

Mode . . . . . . . SINGLE CYCLE

DISPLAY.

All

Address

All

11)
lamp

Data/Address

6-4.

A

that

repeat

pattern

all

12

tests.

not

exactly

tests.

in

Tahle

tion

. . . . . ADDR REG

Bit

Switches.

Data/Address

should

depress

be

should

be
and

Bit

"1"

indicates

it

is

extinguished.

the

process

does

not

exactly

If

after

match,

If

the

pattern

Clock

and

equivalent

6-4,

being

tested.

Bit

extinguished

illuminated.

release

Indicators

that

until
match,

replacing

replace

still

does

IC)

and

hex

address

as

well

as

"~"

state

(down

Indicators ~ through

and

the

STOP

the

START

illuminate

the

If

lamp

the

all

is

illuminate9,

pattern

12

tests

replac~

the

indicated

PWA 3 (Keyboard

not

exa.ctly

repeat

branching

is

all

also

12

shown
opera-

position)

pushbutton

in

the

pattern

is

exa.ctly

have

been

the

indicated

PWA,

Interface)

match,

tests.

and

observe
shown

while

the

a

same

completed.

PWA

and

the

pattern

and

replace

PWA 4

in

"~"

as

repeat

TEST

- -

1
2

3
4

5
6

7

8

9

10
11

12

DA

TA/

ADDRESS

11

10

~

~

~ ~

~

~

~ ~

~ ~

~

~ ~

~

~ ~ ~

~

~

~

~ ~.~

~

~

~

~ ~ ~ ~
~

~
~ ~ ~ ~ ~ ~ ~

~

lj/J/J

~

BIT

7 6 5 4

9 8

~ ~ ~

~

16

,

$I

$I

16

~

~

~

$I
$I

~

~

~ ~

~ ~

~
~ ~ ~
~ ~

~

~

~

~

~ ~

~

~ ~

~ ~

~ ~

~

~ ~ ~ ~

~ ~ ~ 1 ~ 1 ~

lj lj (j 1

Table

6-4.

INDICA TORS

321

~ ~ ~

~

~

~

~

~

1

~

1

~

~

~

ti

1

~

1

~

1

0

~

~ ~

1

~

1 1

~ ~ ~

1

~ ~

~

ti 1 ti

1 1

~

1

~ ~

~ ~

~

1

1

1

1 1

(j 1 1

1

~

(j

Branch

HEX

Tests

BRANCHING

ADDRESS OPERATION

start

of

page

page

return

page

return

page

return

page

return

#3
#2
#1

of

test

test

branch

~~~

~~1

16~3

~1~

~11

~~5

1612

~~6

~14

~~8

~15

~~7

013

intrapage
extra
sequential
extra

and

return
extra

and

extra

and

extra

and
return
return
return
end

branch

branch

branch

#1

branch

#2

branch

#3

DEFECTIVE

PWA

- -

9
9

9

9

10
10

10

10

10
10
10
10

6-8

2441-1

6.5 BRANCH

The

purpose

constant
data.
the
the

from

In

this

storage

Branch

on

1.

of

test,

and

ON

DATA TEST

the

Branch

ROM

to

the

transfer

Data

Test

Install
tests.

on

Data

the

Main

comparison

capabilities
as

Follows:

the

PDA

Test

is

(M)-Register

circuits

of the

as

outlined

to

test

the

and

its

of

the

Arithmetic

M-Register

in

paragraph

system's

ability

(socket

6. 2

capability

to

branch

Logic Unit

11)

are

and

perform

to

on the

(socket

tested.

all

transfer

stored

12)

and

Perform

preceding

a

NOTE:

2. Upon
Datal

3.

Depress

completion
Address

NOTE:

Address

4.

5.

Branch
Set
Depress

the

on

Mode

Address

PDA

Test

Should

an

addresses, " listed

the

CHECK

The following
indicated

TEST

MODE.
Mode.
DISPLAY.

All

address

of

Bit

Indicators

Do

not

reset

and

release

Bit

Indicators

Data

Test.

switch

and

release

Bit

Indicators

which

error

indicates a successful

be

detected

or

STOP

switches

position:

Bit

Switches.

the

Branch

the

the

START

display

to

RUN.

the

START

display

in

Table

lamps.

Test

display

system.

pushbutton

the

pusbbutton

the

one

of

6-5,

should

be

up

SINGLE

. ADDR REG

".0"

(paragraph

the

hex

hex

"starting

hex

"starting

end

the

Branch

will

be

displayed

set

to

(TEST

state

"test

and

and

of

test.

on

the

MODE)

CYCLE

(down

6.4),
end

observe

address"

observe

address"

observe

address"

Data

without

position)

that

,019 of

that

,048

Test

hex

illuminating

that

the

the

of

the

,013.

Datal

the

Datal

the

"error

Table

~1B

~1E

~21

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ft$27
ft$2A

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If

the

tected.

6-5.

test

If

2441-1

Branch

stops

an

"error

at

on

any

address

address"

Data

Test

"Error

other

is

displayed,

than

Addresses"

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ft$37
ft$3A
ft$3D
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an

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replace

will

PWA 12

have

been

(Arithmetic

6-9

de-

6.6

PDA

The

purpose

ability

of
responses
branching

Test

as

Logic Unit) and

run

successfully,

rerun

TEST

the

of

the

PDA

the

PDA

to

include:

on

the

Mode

follows:

1.

Install

tests.

rerun

replace

test.

respond

Other

Test

is
to

illuminating

switch

the PDA

when

as

the

test.

PWA

11

PWA

IS

that

to

provide a self

commands

the

STOP

it

is

placed

outlined

in

If

after

(Main

could

from

lamp,

in

paragraph

replacing

and

General

affect

test

the

this

for

the

Microprocessor

illuminating

the

LOOP

6.2

PWA 12,

Purpose

test

are

PDA.

the

CHECK

position.

and

perform

the

3,

In

this

is

tested.

Perform

test

does

Register)

4, 9,

and

test,

lamp,

all

preceding

not

and

10.

the

These

and

the

PDA

NOTE:

2. Upon
the

Data/Address

of

the

NOTE: Do

3.

Set

the

4.

Depress
Data/Address

that

5.

Depress
Address

STOP

6.

Set

the

The following

indicated

TEST
Mode.
DISPLAY .

All

completion

PDA

Test.

Mode

and

release

both

the

CHECK

and

release

Bit

Indicators

lamps

remain

Mode

position:

MODE

Address

of

the

Bit

Indicators

Also,

not

reset

~witch

to

the

Bit

Indicators

and
the

illuminated.

switch

to

switches

Bit

Indicators.

Branch

observe

the

system.

SINGLE

START

display

STOP

START

display

LOOP.

should

on

Data

display

that

the

CYCLE.

pushbutton

hex

lamps

illuminate.

pushbutton

hex

address

be

set

up

(TEST

RUN

ADDR REG

"~II

Test

(paragraph

the

hex

STOP

twice

address

and

~4B

to

the

state

(down

"starting

lamp

and

~4A.

observe

and

both

MODE)

position)

6.5)
address"

is

illuminated.

observe

Also,

that

the

observe

that

that

~48

the

observe

the Datal

CHECK

and

7.

8.

Depress

lamp

Depress
Address

observe
dress"

the

is

extinguished

and
Bit

that

~4E

placed.

6.7 G·REGISTERS TEST

The

purpose

fer

data

of

the G P-Register

6-10

from

of

the

the

G-Registers

M-Register

(socket

RESET

release

Indicators

the

STOP

is

displayed,

Test

to

each

11).

In

pushbutton

and

that

the

START

display

lamp

is

of

this

the

to

the

test,

test

remains

test

sixteen

on

the

the

STOP

pushbutton

the

hex

has

the

system

each

PDA

and

lamp

remains

and

"test

end

illuminated.

failed,

and

IS

capability

G-Registers

of

the

eight

observe

that

illuminated.

observe

address"

If

the

the

PDA

that

constitute

M-Register

the

that

the

~4F.

hex

should

to

store

bits

CHECK

Datal

Also,

"error

be

and

one-half

(M~

2441-1

ad-

re-

trans-

through
in

(Ci)

M7)

input

returned,

is

repeated
M-Register.
256

complete

ter,

initially
256th
Perform

transfer,

the

is

first

of

the

through

until

each

The

transfers,

tested

the

G-Registers

1.

Install
tests.

set

ALU

the

data

in

data

to

zero.

and

then

ALU on

of

the

is

incremented

through

this

routine,

stored

Test

the

PDA

The

transferred

the

ALB

sixteen

all

in

the

as

follows:

as

outlined

data

is

then

to

lines,

G-Registers

by

one

registers,

is

used

to

GF

register

in

paragraph

incremented

the

G1

to

the

has

and

the

have

count

is

register

M-Register.

received
entire

been

each

tested

process

accomplished.

complete

for

6.2

and

by 1

through

via

the

The

the

data

transfer.

the

expected

perform

data

transfer

and

is

repeated

The G¢

all

the

carry-

bus.

It

process

returned

until

regis-

On

the

stored

preceding

is

it

to

data.

the

NOTE:

2. Upon

Datal

NOTE: Do

3.

Set

the

Depress

4.
Address

observe

If

an

G-Registers

Address

PWA 12

¢6E

Register)
are

The
indicated

TEST
Mode.
DISPLAY
All

completion
Address

Mode

and
Bit

that

error

is

Bit

(Arithmetic

or

¢86

is

and

3, 4, 9,

following

positions:

MODE

Address

of

the

Bit

Indicators

not

reset

switch

to

release

Indicators

the

STOP

detected,

Test

hex

Indicators

displayed,

rerun

and

the

10.

switches

Bit

PDA

the

RUN.

the

START

display

lamp

the

"error

display

Logic

replace

test.

should

Switches

Test

(paragraph

display

system.

pushbutton

the

illuminates.

CHECK

addresses"

the

Unit)

and

PWA 11 (Main

Other

the

hex

lamp

hex

rerun

PWA's

be

set

up

(TEST

LOOP

ADDR REG

"1/"

state

6.6),

hex

"test

and

"test

end

will

illuminate,

will

be

"error

the

that

to

the

MODE)

(down

observe

end

observe

address"

displayed.

address"

test.

and

If

General

could

position)

that

address"

that

the

¢AE.

and

If

¢5A,

"error

Purpose

affect

this

the
¢4F.

Datal

Also,

one

of

the

Datal

replace

address"

test

the

6.8 H-REGISTERS TEST

The

purpose
transfer
the

other
manner
during
transfer,
Perform

the

of

data

from

half

of

as

the

G-Registers

G-Registers

the

data

the

H-Registers

1.

Install

the

H-Registers
the

the

GP-Register

stored

the

M-Register

Test,

tests.

2441-1

Test

in

the

Test

PDA

Test

to

(socket

(paragraph

is

used

HF

register

as

follows:

as

outlined

is

to

each

to

count

test

of

the

11).

6. 7).
each

is

in

paragraph

the

system's

sixteen

This

The

complete

tested

H-Registers

test

is

G¢

for

the

6.2

capability

performed

register,

transfer.
expected

and

perform

to

store

that

constitute

in

much

initially

On

the

stored

all

and

the

same

tested

256th

data.

preceding

6-11

NOTE:

The

following

indicated

switches

position:

should

be

set

to

the

2. Upon
the

Datal

NOTE:

3.

Set

the

Depress

4.

Address

observe

If

an
isters
Bit

Indicators

(Main

PWA

(Arithmetic

affect

TEST
Mode.
DISPLAY

All

Address

completion

Address

Do

not

Mode

error

Test

and
Bit

Indicators

that

is

hex

switch

release

the

detected,

display

and

General

11,

the

hex

Logic Unit)

this

test

MODE

of

Bit

reset

STOP

"error

"error

are

Bit

the

G-Registers

Indicators

the

to RUN.

the

START

display

lamp

the

address"

the

Purpose

address"

and

3, 4, 9,

Switches

display

system.

pushbutton

the

illuminates.

CHECK

~B9

hex

"error

Register)

rerun
and

10.

Test

hex

lamp

will
address"

and

is

still

the

test.

up

(TEST

RUN

ADDR

"~,,

(paragraph

the

hex

and

"test

end

will

be

displayed.

rerun
displayed,

Other

MODE)

REG

state

(down

6.7),

"test

end

observe

address"

illuminate,

~B9,

replace

the

test.

replace

PWA' s that

position)

observe

address"

that

the

~E4.

and

the

If

the

PWA 11

If

after

PWA 12

that

~AE.

Datal
Also,

H-Reg-

DatalAddress

replacing

could

6.9 ALU TEST

The

purpose
arithmetic
Arithmetic

of

operations.

Logic

1.

2. Upon

3.

4.

the

ALU

Test

In

Unit

(socket

Install

the

tests.

NOTE:

completion

the

Datal

NOTE: Do

Set

the

Depress

Address

observe

Address

Mode

and
Bit

that

is

to

test

this

test,

12)

are

PDA

as

outlined

The

following

indicated

TEST

position:

MODE
Mode.
DISPLAY .
All

Address

of

the

Bit

not

reset

switch

release

to

the

Indicators

the

STOP

the

system's

each

of

the

tested.

in

paragraph

switches

Bit

Switches

H-Registers

Indicators

the

system.

RUN.

START

display

lamp

illuminates.

capability

logic

Perform

should

Test

display

pushbutton

the

hex

and

arithmetic

the

ALU

6.2

and

be

set

up

(TEST

RUN

ADDR REG

"~"

(paragraph

the

hex

and

"test

end

to

perform

Test

perform

to

the

state

"test

observe

address"

functions

as

follows:

all

MODE)

(down

6.8),
end

address"

that

both

logic

of

preceding

position)

observe

the

Datal

1BB.

Also,

and

the

that

~E4.

6-12

2441-1

NOTE:

If

an

error

hex

"error

Bit

Indicators

(Arithmetic

hex

"error

pose

Register)

4,

9,

and

The
will
complete.

is

detected,

addresses",

display

Logic

addresses"

and

10.
Table

ALU
take

one

Unit)

rerun

6-6.

Test,

due

approximately

the

CHECK

listed

and

is

ALU

of

rerun

still

the

in

Table

the

ALU

displayed,

test.

Test

to

its

lamp

Test

the

test.

Other

"Error

complexity,

10

seconds

will

illuminate

6-6,

will

hex

"error

If

after
replace
PWA's

Addresses"

to

and

one

be

displayed.

addresses",

replacing

PWA 11 (Main

that

could

affect

of

If

PWA

and

this

the

ALU

the

Data/Address

replace

12,

one

General

test

Test

PWA 12

of

the

Pur-

are

3,

0ED
0EF

0F2
0F3
0F5
0FA
0FC
102
105
107
109
10F

6.10 BUFFERS TEST

The
for
and

purpose

the

16).

Read

Perform

of

the

Only

Buffers

buffer,

the

Test

(sockets

Buffers

is

Test

to

13

as

114
116
llA
lID
12E
132
136

13A

13F
145

15A

164

test

the

and

14)

follows:

Buffer

and

the

I/O

and

Buffer

Read/Write

166
16F
176
17C
185

18A

192

19A

1A4
lAC

1B5

buffer

Control

(Sockets

functions

15

1.

Install

the

tests.

NOTE:

2441-1

PDA

as

The

following

indicated
TEST

MODE
Mode.
DISPLAY

All

Address

outlined

switches

pOSition:

Bit

in

paragraph

Switches

should

6.2

be

set

up

RUN
ADDR

"f/"

and

perform

to

(TEST

state

the

MODE)

REG

(down

all

preceding

position)

6-13

2. Upon
Address

completion

Bit

Indicators

of

the

ALU

Test

display

(paragraph

the

hex

"test

6.

end

9)

observe

address"

that

1BB.

the

Data/

NOTE: Do

3.

Set

4.

Depress

Address

observe

If

an

Buffers
played.
Buffers
I/O)

still
displayed,
If

the

Test
and

inates

replace

the

Mode

and

release

Bit

Indicators

that

the

error

is

Test

If

the

Test

and

rerun

illuminates

replace

Data/Address

hex

"error

rerun

and

the

one

PWA 16

Table

6-7.

not

reset

switch

to

the

RUN.

the

display

STOP

lamp

detected,

hex

"error

Data/Address

hex

"error

the

test.

and

one

PWA 14 (Read Only

Bit

addresses",

test.

of

If

after

the

Read/Write

(Read/Write

Buffers

system.

START

pushbutton

the

illuminates.

the

CHECK

addresses",

Bit

addresses",

If

after

of

the

Read

Indicators

replace

replacing

Buffer

Test

"Error

and

hex

"test

end

lamp

will

illuminate,

listed

Indicators

replace

replacing

Only

in

display

PWA 13 (Read Only

PWA

hex

"error

Buffer

display

one

PWA 15

PWA 15 the CHECK

hex

"error

Control)

addresses"

and

Addresses"

observe

that

address"

Table

6-7,

one of

13,

the

CHECK

addresses"

Control)

of

the

and

Read/Write

(Read/Write

is

rerun

the

the

272.

and

will

the

rerun

Buffer

lamp

still

test.

Data/

Also

one

of

be

dis-

Read

Only

Buffer

lamp

is

still

the

Buffers

I/O)
still
displayed,

the

test.

illum-

6.11

DATA

The

purpose

the

ability

(socket

console

1BE
1C4
1C8
1CD
1D5
1D8
1E2

3).

to

READ ONLY

BUS

OUT

of

the

of

the

system

In

this

the

keyboard

1.

Install
tests.

(LAMP) TEST

Data

Bus

Out (Lamp)

to

communicate

test,

one

direction

is

tested.

the

PDA

1EB

1F6
1FB
2f35
2f39
212

as

outlined

Test

with

of

the

Perform

is

to

the

keyboard

bidirectional

the

Data

in

paragraph

READ/WRITE

216 243

21E
223 257
228
22D
232 26C
23B

test

the

data

bus

8-bit

Bus

Out (Lamp)

6.2

via

and

"out"

the

Keyboard

data

flow

perform

lines

path

Test

all

251

259
263

and

Interface.

from

as

follows:

preceding

thus

the

6-14

2441-1

NOTE:

The following

indicated

position:

switches

should

be

set

to

the

2. Upon

3.

4.

SEQUENCE

1

TEST

MODE
Mode.
DISPLAY
All

completion

Data/Address

NOTE:

Set

the Mode

Depress
on the
pattern

imately

Table

Do

and

keyboard,

shown.

four

6-8.

Address

of

Bit

not

switch

release

listed

Those

seconds.

Data

Bit

the

Buffers

Indicators

reset

to

the

the

RUN.

START

in

keys

Bus

NUMBER
OF

KEYS

ILLUMINA TED (Keys

All

None

keys

Switches

Test

display

system.

pushbutton

Table

listed

6-8,

should

Out (Lamp)

PATTERN

Illuminated)

illuminated

up

(TEST MODE)

RUN

ADDR REG

.

"0"

(paragraph

the

hex

"test

and

illuminate

remain

Test

Sequence

state

(down

6.10),
end

address"

observe

in

the

illuminated

position)

observe

that

exact

TIME

~4

that

the

272.

those

keys

sequence

for

approx-

sec

and

2 3
3
4 2

5

6
7

*Flashing

If

Address

that

If

board
and

6.12 DATA

4 LINE-SKIP-MARG

3

3*
3*

both

the

sequence

Bit

Indicators

the

STOP

both

the

Interface)

pattern

BUS

IN (THUMBWHEEL) TEST

lamp

sequence

and

are

still

is

WORD-DUP-REV

PARA-CODE
AUTO-PLA
PLA Y -REC-SEARCH

Test

End

and

pattern

display

are

the

hex

illuminated.

and

pattern

rerun

not

exactly

the

are

test.

as

shown,

PRINT

Y-SEARCH

(single

buzzer)

-

exactly

"test

not

exactly

If

after

replace

CONT-REC

as

shown,

end

address"

as

shown,

replacing

the

continuous

~1/4

observe

28F.

replace

PWA3,

keyboard

"

"

.11

"

sec

that

the

Also,

PWA3 (Key-

both

the

and

rerun

Data/

observe

sequence

the

test.

The

purpose

and

thus

Interface

of

the

ability

(socket

the

3)

Data

of

the

and

Bus

keyboard

Tape

2441-1

In

(Thumbwheel)

to

communicate

Control

(sockets

Test

17

is

with

and

to

20)

test

the

the

system

PWA's.

data

In

bus

via

this

"in"

the

Keyboard

test,

lines

the

6-15

remaining

console

direction

is
thumbwheels
Data

Bus

In

of

tested.

and

This

reading

(Thumbwheel)

1.

Install
tests.

the

bidirectional

is

accomplished

those

Test

the

PDA

numbers

as

follows:

as

outlined

8-bit

by

on

in

data

flow

setting

the

block

paragraph

path

numbers

address

6. 2

from

into

displays.

and

perform

the

keyboard

the

system

Perform

all

to

the

with

the

the

preceding

NOTE:

2. Upon

completion
observe
address"

NOTE:

3.

Set

the

Mode

4.

Depress
thumbwheels
both

block

If

the

numbers

After a successful

CYCLE

"test

end

If

both

block

thumbwheels,

If

both

block

keyboard

indicate
PWA17
error

(Read/Write)

is

associated

The following

indicated

TEST

MODE
Mode.
DISPLAY .
All

Address

of

that

the

Data/Address

28F.

Do

not

reset

switch

and

release

through

address

are

and

observe

address"

address

replace

address

and

rerun

properly,

still

indicated,

with

the

switches

position:

Bit

Switches

the

Data

Bus

Bit

the

system.

to LOOP.

the

START

their

full

range
displays
properly

completion

that

295.

displays

indicate

displayed,

of

the

Data/Address

Also,

fail

PWA3 (Keyboard

displays

the

test.

replace

or

PWA20 (Read Only),

still

If

the

associated

replace

failing

block

should

Out

be

(Lamp)

Indicators

pushbutton.

(numbers

the

numbers

the

this

test,

observe

to

indicate

that

Interface)

fail

to

only

one

the

corresponding

address

set

to

the

up (TEST MODE)
RUN

ADDR REG

"~i'

state

Test

display

Rotate

test

set

the

Bit

the

the

indicate

block

Tape

and

(down

(paragraph

the

each

~-9)

and

set

into

has

been

Mode

Indicators

STOP

lamp

numbers

and

rerun

properly,

address

Control

rerun

Display

display

and

rerun

position)

6.11),

hex

"test

of

the

observe

the

thumbwheels.

successful.

switch

to

display

is

illuminated.

set

into
the
replace

display

fails

PWA, i.

the

test.

Panel

the

test.

end

two

that

SINGLE

the

the

test.

e.

,

If

an

PWA

hex

the

to

6.13 KEYBOARD STROBE TEST

The

purpose

clear

(~)

a
8-bit
will

an

with a minimum

maximum

data

be

8-bit

8-bit

flow

tested.

l.

of

the

ASCII

path

Perform

Install

Keyboard

character

8-bit

ASCII

character

from

the

ASCII

the

the

PDA

tests.

6-16

Strobe

bit

Test

pattern

character

bit

keyboard

Keyboard

as

outlined

is

from

bit

pattern

to

the

Strobe

in

to

determine

the

data

pattern

(hex

EF)

console

Test

as

paragraph

whether a keyboard

bus.

(hex

are

via

~1)

and

used.

the

Keyboard

In

this

an
Again

follows:

6.2

and

perform

strobe

test, a search

upper

case

the

bidirectional

Interface

all

preceding

"0"

(socket

2441-1

will

code

with

3)

NOTE:

The

following

indicated

switches

position:

should

be

set

to

the

2. Upon

3.

4.

5.

6.

6.14 PRINTER TEST·

completion
observe
address"

NOTE:

Set

the
Depress
Depress

illumina

Depress
observe
the

Datal

and

that

TEST
Mode.
DISPLAY
All

that

the

295.
Do

Mode

and

release

an

upper

te.

the

"6"

that

the

Address

the

STOP

MODE

Address

of

the

Da

tal

not

reset

switch

case

key

CHECK

Bit

lamp

Bit

Switches

Data

Address

the

system.

to

RUN.

the

START

"0"

together

lamp

Indicators

illuminates.

Bus

In (Thumbwheel)

Bit

Indica

pushbutton.

and

observe

with

the

does

not

display

up

(TEST
SINGLE
ADDR REG

"0"

tors

display

that

the

CODE

key

illuminate.

the

hex

CYCLE

sta

te

Test

CHECK

(search

"test

MODE)

(down

(paragraph

the

hex

lamp

code

Also

observe

end

position)

"test

does

(fi))

address"

6.12),

end

not

and

that

2D9

The

purpose

rier

at

the

determined

Perform

the

of

the

left-hand

sequence.

Printer

1.

Install
tests.

NOTE:

2. Upon
that
2D9.

NOTE:

3.

Insert a piece
for

85

Printer

margin,

Test

the

completion

the

characters.

Test

This

as

PDA

The

indicated

TEST
Mode.
DISPLAY

All

Datal

Do

is

to

and

printing

output

follows:

following

Address

Address

not

of

is

as

outlined

position:

MODE

of

the

reset

paper

An

functionally

85

characters

visually

switches

Bit

Keyboard

Bit

the

into

8-1/2"

checked

in

paragraph

Switches

Indicators

system.

the

printer.

x

test

should

Strobe

11"

paper

the

from

against

6.2

be

up

RUN

ADDR REG

"\1"

Test,

display

The

printer

the

the

and

perform

set

to

(TEST

state

(paragraph

the

hex

paper

inserted

by

positioning

printwheel

sequence

all

the

MODE)

(down

"test

should
endwise

in a pre-

for

errors.

preceding

position)

6.13)

end

observe

address"

provide

is

sufficient.

the

space

car-

4.

Set

the

Mode

2441-1 6-17

switch

to

RUN.

5.

Depress
types

out

and

the

release

the

following

START

sequence

pushbutton
on a single

and

line:

observe

that

the

printer

ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz{t

If

the
tors

illuminates.

If

Interface)
as

6.15 TRANSPORT

The

purpose

port

operation.

the

case

outlined

test

or

to
lowing
active
on

tests

transport

the

Typewriter

DOUBLE

of

the

of

the

previous

in

paragraph

isolate a specific

may

must

space

to

the

test

exact

display

the

sequence

shown,

TESTS

Transport

These

6.2.

be

performed.

be

to

SINGLE

activate

is

successful,

sequence

the

and

rerun

replace

tests

do

test.

In
problem

selected.

space

the

as

shown.

hex

"test

is

not

typed

the

test.

the

printer.

Tests

Each

this

is

to

not

automatically

test

way,

can

Prior

This

to

activate

Read/Write

the

printer

Observe

end

address"

out

exactly

If

verify

must

the

be

to

be

routine

directly

performing

is

accomplished

the

(R/W)

will

as

the

sequence

proper

progress

initiated

required

entered.

anyone

Read

transport.

!"#'I0&'0*+,-./0123456789:;(=)?

have

typed

that

the

Data/Address

3B1 and

that

shown,

is

Read/Write

from

by

the
to

Anyone
of

by

setting

Only

(BO)

out

the STOP

replace

still

not

or
one
Service

on a single

PWA 1

typed

Read Only

to

another

Engineer

Bit

light

out

as

line

Indica-

(Printer

exactly

trans-

in
as

perform a particular

or

all

of

the

the

follOWing

the

Line Space

transport

tests,

or

to

fol-

an

Lever

The Run

port

The Run
to

drive

to

drive

Forward

Forward

the

The Speed

a

specified

a

predetermined
Write
verify

These
unless
address"
current
cause

Read

Forward

and

the

Perform

6.15.1

transport

proper

tests

stopped

2F7)

is

the

transport

Only

test

CHECK

Data/Address

each

Run

Normal

the

tape

Fast

tape

in

the

Test

is

used

tolerance.

bit

electronics.

transport

will

continuously

by a Servo

condition.

monitored.

to

tape

cassette

will

not

lamps

will

Bit

of

the

Forward

and

in

the

and Run

direction

to

verify

The

pattern

operation.

Unsafe
During

A

Write

stop

and

has

start.

illuminate

Indicators.

tests

as

Normal

Test

Run

Reverse

direction

Reverse

specified
that

Normal

that

will

All

of

operate

("error

the

Current

the

STOP

been

placed

If

a

Read

and

outlined

specified

Fast

the

selected

Write

aid

the

these

between

Normal

Not

and

in

Only

the

in

the

Normal

by

tests

by

the

Forward

Service

tests

can

the

address"

Write

Present

CHECK

the

Read/Write

tape

cassette

hex

"error

following

tests

the

test

will

also

test,

but

transport

test

Engineer

be

used

clear

leader

2ED)

Forward

("error

lamps

address"

paragraphs.

will

cause

at

the

cause

at

the

is

operating

permits

in

by

or

an

test,
address"

to

transport,

is

detected,

the

selected

normal

the

fast

speed

selected

speed

at a speed

continuous

troubleshooting

the

Service

at

either

NEOT

the

Engineer

end

Not

Detected

presence

39C)

illuminate.

the

Normal

both

the

fAfAF

will

be

displayed

trans-

of

20

transport

of

70

ips.

writing

the

of

the

tape,

of

write

condition

Also,

if

Write

STOP

ips.

within

of

Read/

to

("error

will

a

by

Perform

the

Run

Forward

6-18

Normal

Test

as

follows:

2441-1

1.

Install
tests.

the

PDA

as

outlined

in

paragraph

6.2

and

perform

all

preceding

NOTE:

2.

Select

3.

Place a "scratch"

NOTE:

4.

Set

in

the

8a

through

Set

5.

6.

the

Depress
quired,
leader

(20 ips)
transport
Data/Address

The

indicated

TEST
Mode.
DISPLAY

All

an

active

If

transport

should
the
reclosing.

hex

8f.

Mode

and

in

the

is

reached,

until

will

following

MODE

Address

transport

cassette

after

placing a tape

immediately

motors

"starting

switch

release

reverse

then

the

clear

stop

and

Bit

Indicators

switches

position:

Bit

Switches

as

and

closing

have

stopped

address"

to

RUN.

the

STAR T

direction

run

leader

the

STOP

outlined

into

the

cassette

the

reopen,

pushbutton.
at

in

the

at

the

display

should

in

selected

door,

turning

2C0

as

the

forward

other

lamp

the

be

set

up

(TEST
RUN
ADDR REG

"0"

paragraph

transport.

into

the

wait

until

before

outlined

The

fast

speed

direction

end

will

illuminate.

hex

"test

to

state

the
door

in

of

the

the

MODE)

(down

6.15.

paragraph

tape

will

(70

ips)

at

the

tape

Observe

end

address"

position)

6.2,

run,

until

clear

normal

is

reached.

2F4.

if

that

steps

re-

speed

The

the

2441-1

7.

If

an

error

will

illuminate.

After

replacing

problem,

most

likely

tinue

this

and

the

STOP

If

testing a dual

Run

Forward

is

detected,

Refer

the

rerun

the

defective

procedure

lamp

station

Normal

the

test

to

Table

PWA

most

test.

until

PWA

If

or

the

an

hex

illuminates.

system,

Test.

will
6-9

likely

error

check

"test

select

stop

and

for

an

defective

is

still

the

next

end

the

the

STOP

analysis

or

checking

detected,

most

address"

other

transport

of

the

likely

2F4

and

CHECK

error

the

replace

problem.

is

encountered

.

and

lamps

condition.

most

the

likely

next

Con-

rerun

6-19

the

Table

6-9.

Transport

Tests

Error

Analysis

ERROR

ADDRESS

2D3

2ED

2F7

3DA

3F8

ERROR CONDITION

Cassette

Servo

NEOT

Unselected

Not

Unsafe

Not

Detected

Transport

In

Place

Active

Selected
Not

Transport

Active

AFFEC

RO

RO

RO

TED PWA

Jl

(1)

J2

(2)

B/W

R/W

R/W

Jl
J2

(1)

(2)

PWA 20(3) PWA 17(3)
RO

Jl

(1)

R/W

Jl

(1)

RO

J2

(2)

R/W

J2

(2)

PWA

20(3)

PWA 17(3)

BO

Jl

(1)

R/W

J1

(1)

RO

J2

(~)

R/W

J2(2)

PWA

20(3)

PWA 17(3)

RO

J1

(1)

R/W

J1

(1)

R/W

RO

J2

PWA

RO

J1

RO

J2

PWA

(~

20(3)

(1)
(2)

20(3)

J2(2)

PWA 17(3)

R/W

Jl(1)

R/W

J2(2)

PWA 17(3)

(1Check

on

(2Check
(1Check

the
and in

I1Check

CIN

the

selected

associated
for

transport

the

position

function

(2Check

(1Ensure

associated

that
is a tape
the

selected

2Check CIN

the

unselected

1

Ensure

that
is a tape
in

the

selected

2Check

CIN

selected

CHECK-

switch

transport.

binding

motors

tape

cassette.
and

of

NEO T

there

cassette

transport.

switch

transport.

there

cassette

transport.

switch

transport.

wiring.

in

sensor.

wiring.

in

on

on

6.15.2

Perform

Run

the

1.

2.

3.

(11

Most

Reverse

Run

Normal

Reverse

Install

likely

the

tests.

NOTE:

Select

an

active

Place a "scratch"

(2)

Second

Test

Normal

PDA

as

outlined

Test

The following

indicated

TEST

position:

MODE .
Mode.
DISPLAY .
All

Address

transport

cassette

most

as

follows:

in

switches

Bit

Switches

as

into

likely

paragraph

should

outlined

the

selected

(3)

Third

.

6.2

be

up

most

and

set

(TEST

RUN

. ADDR REG

.

"fI"

in

paragraph

state

transport.

likely

perform

to

the

MODE)

(down

6.15.

aU

preceding

position)

6-20

2441-1

4.

5.

6.

NOTE,

Set

in

the

Sa

through

Set

the

Mode

Depress
required,
leader

(20

The

the

If

will
After

is

ips)

transport

Data/Address

an

error

illuminate.

replacing
problem,
most
tinue
and

likely
this

the

If

after

the

transport

the

door
wait
turning

hex

Sf.

switch

and

release

in

the

reached,

until

the

is

detected,

rerun

defective

procedure

STOP

lamp

placing a tape

should

until

the

before

"starting

to RUN.

the

forward

then

clear

will

leader

stop

Bit

Indicators

Refer

the

PWA

the

test.

PWA

until

illuminates.

cassette

and

closing

immedia

motors

reclosing~

address"

START

direction

run

in

at

and

the

the

tely

have

2C4

pushbutton. The

at

the

reverse

the

other

STOP

display

the

test

will

to

Table

most

If

the

or

likely

an

error

check

hex

6-9

"test

for

the

into

door,

reopen,

stopped

as

outlined

the

fast

direction

end

lamp

will

the

hex

stop

and

an

analysis

defective

is

still

next

end

address"

in

paragraph

tape

speed

of

(70

the

illuminate.

"test

the

STOP

of

or

checking

detected,

most

likely

will

ips)

at

the

tape

end

and

the

replace

2F4

6.2

run,

until

normal

is

reached.

Observe

address"

CHECK

error

the

most

the

problem.

is

encountered

steps

if

clear

speed

that

2F4.

lamps

condition.

likely

next

Con-

6.15.3

Perform

7.

Run

the

1.

2.

3.

If

testing a dual

Run

Reverse

Forward

Run

Forward

Install

Fast

the

Test

PDA

station

Normal

Fast

as

Test

tests.

NOTE: The following

indicated
TEST

MODE
Mode.
DISPLAY .

All

Address

Select

an

active

transport

Place a "scratch"

If

NOTE:

after

transport

should

the

immediately

motors

reclosing.

system,

Test.

as

follows:

outlined

in

paragraph

switches

position:

Bit

Switches

as

outlined

cassette

into

placing a tape

and

closing

reopen,

have

stopped

select

should

.

the

selected

cassette

the

door,

turning

the

other

6.2

be

up

and

set

(TEST

transport

perform

to

RUN

. ADDR REG

"Y'''

state

in

paragraph

transport.

into

the

the

door

wait

until

before

the

MODE)

(down

6. 15.

and

rerun

all

preceding

position)

the

2441-1

6-21

4.

5.

6.

7.

Set

in

the

hex

steps
Set
Depress

quired,

leader

(70
The

the

If

will
After

Sa

through

the

Mode

and

in

is

reached,

ips)

until

transport

Data/Address

an

error

illuminate.

replacing

problem,

most

likely

tinue

this

procedure

and

the

STOP

If

testing a dual

Run

Forward

"starting

switch

release

the

reverse

the

will

is

detected,

the

rerun

defective

lamp

Fast

Sf.

to RUN.

the

direction

then

clear

leader

stop

Bit

Indicators

Refer

to

PWA

the

test.

PWA

until

illuminates.

station

Test.

address"

START

run

in

the

at

and

the

the

test

Table

most

likely

If

an

or

check

the

hex

system,

2CS,

as

pushbutton.
at

the

fast

forward

the

other

STOP

will

6-9

lamp

display

stop

for

the

an

defective

error

the

"test

select

is

still

next

end

the

outlined

The

speed

direction

end

of

will

illuminate.

hex

and

the

analysis

or

detected,

most

address"

other

in

paragraph

tape

will

(70

ips)

at

the

the

tape

"test

end

STOP

of

and

the

checking

replace

likely

2F4

transport

6.2,

run,

until

clear

fa'st

speed

is

reached.

Observe

address"

CHECK

error

the

most

the

problem.

is

encountered

and

rerun

if

re-

that

2F4.

lamps

condition.

likely

next

Con-

the

6.15.4

Perform

Run

the

1.

2.

3.

Reverse

Run

Reverse

Install

Fast

Test

the PDA

tests.

NOTE:

The foliowing

the

TEST
Mode.
DISPLAY .

All

Select

an

active

Place a "scratch"

NOTE:

If

transport
should
the
reclosing.

Fast

Test

as

indicated

MODE .

Address

transport

after

motors

as

follows:

outlined

in

switches

position:

Bit

Switches

as

outlined

cassette

into

placing a tape

and

closing

immediately

have

stopped

paragraph

should

.

in

the

selected

cassette

the

door,

reopen,

turning

6. 2

and

be

set

up

RUN

ADDR REG

"0"

paragraph

transport.

into

the

wait

until

before

perform

all

to

(TEST MODE)

state

(down

6.15.

the
door

preceding

position)

4.

Set

in

the

hex

5.

6.

steps
Set
Depress

quired,

the

Sa

through

Mode

and

in

6-22

"sta.rting

switch

release

the

forward

Sf.

address"

to RUN.

the

START

direction

2CC

as

outlined

pushbutton.
at

the

fast

The

speed

in

paragraph

tape

will

(70

ips)

run,

until

6.2,

if

clear

2441-1

re-

leader

(70 ips)

The

the

If

an
will
After
problem,
most
tinue
and

7.

If

testing a dual

Run

6.15.5 Speed Tests

is

reached,

until

transport

Datal

Address

error

is

illuminate.

replacing

rerun
likely
this

the

defective

procedure

STOP

Reverse

then

the

clear

will

stop

Bit

detected,

Refer

the

PWA

the

test.

lamp

illuminates.

station

Fast

Test.

run

leader

and

the

Indicators

the

test

to

Table

most

If

PWA

until

or

the

system,

in

the

at

likely

an

check

hex

reverse

the

other

STOP

display

will

6-9

for

error

the

"test

select

direction

end

lamp

will

the

stop

and

an

analysis

defective

is

still

next

end

address"

the

other

of

the

illuminate.

hex

"test

the

STOP

or

checking

detected,

most

transport

at

tape

end

of

the

likely

2F4

the

fast

is

reached.

Observe

addre

and

CHECK

error

the

replace

problem.

is

encountered

and

speed

ss"

2F

lamps

condition.

most

the

likely

next

Con-

rerun

that

4.

the

Perform

the

1.

2.

3.

4.

Speed

Install
tests.

NOTE:

Select
Place

NOTE:

Set
steps

Tests

a 1600

in

the

8a

as

the

PDA

The

indicated
TEST

Mode.

DISPLAY

All

an

active

If

transport

should
motors
closing.

hex

through

follows:

as

outlined

following

MODE

Address

transport

FCPI

after

test

placing a tape

immedia

have

"starting

8f.

switches

position:

Bit

Switches

as

cassette

and

closing

tely

stopped

address"

in

paragraph

outlined

into

cassette

the

reopen,

turning

should

in

the

door,

34E

as

6.2

and

be

set

up

RUN

ADDR REG

"/)"

paragraph

selected

into

the

wa

it

until

before

outlined

perform

to

the

all

(TEST MODE)

state

(down

position)

6. 15.

transport.

the

door

the

re-

in

paragraph

preceding

6.2,

5.

Set

the

Mode

6.

Depress

ically

rewind

forward

is

reached

the

hex

7.

Look

through

that

both

2441-1

switch

and

release

the

direction

the

address

the

spools

to

the

tape,

at

the

transport

35A

will

window

contain

RUN.

START

if

required,

fast

will

be
in

pushbutton.

speed

stop.

displayed.

the

transport

approximately

then

(70

The

it

ips).

STOP

door

the

The

will

When

same

transport

advance

the

lamp

will

and

visually

amount

will

the

tape

center

illuminate

ascertain

of

tape.

automat­in

of

the

In

a

tape

and

the

6-23

8.

9.

event
start
still
Control
the
center

Set
Set

that

of

does

associated

the
the

the

transport

the

test,

not

advance

PWA

of

Mode
DISPLAY

the

(RO

Motor

tape,
switch

refer

to

J1

or

Control

replace

to

switch

does

not

to

the

the

center

R/W

J1)

PWA,

the

LOOP.

to

MAIN REG.

advance

Trm.lhleshooting

of

and

transport

the

repeat

the

transport

to

tape,

the

and

the

center

Chart,

replace

procedure.

still

repeat

of

the

Table

the

fails

the

procedure.

tape

at

7-2.

associated

If
to

If

the

after

replacing

advance

the

Motor

tape

to

the

10.

Perform
a.

Depress

advance
The

upon

NOTE:

When
digits
Bit
is
of

the

forward

and

the

system

the

test

the

transport

by

the

Indicators 8 through

in

the

MAIN REG

these

two

Table

Speed

release

tape

approximately

buzzer

results.

1.

2. Two

3.

Data/Address

hex

6-10.

will

One

buzz

port

speed

buzzes

port

speed

Three

transport

ified

tolerance

stops,

position.

digits

Speed

Test

as

the

START

buzz

indicates

is

indicate

is

buzzes

speed

its

Bit

11

will

into

transport

Conversions

follows:

pushbutton.

8"

in a forward

once,

too

too

indicate

(22.4-23. 6 ips)

exact

twice,

that

slow.

that

fast.

that

is

within

speed

Indicators 0 through

not

function

Refer

to

or

the

trans-

the

the

the

will

Table

speeds.

trans-

spec-

since

The

transport

direction

three

be

displayed

the

6-10

for

and

times

7.

depending

as

Data/Address

DISPLAY

the

conversion

will

stop.

two

hex

switch

SPEED

MAIN REG

DISPLAY

D9
DA
DB
DC
DD
DE
DF

TOO SLOW

ACTUAL

SPEED

(ips)

21.

7

21.

8

21.

9 E2

22.0·

22.1

22.2

22.3

6-24

SPEED

MAIN REG

DISPLAY

IN TOLERANCE

E0
E1

E3

E4
E5
E6
E7
E8
E9
EA
EB
EC

ACTUAL

SPEED

22.4

22.5

22.6

22.7

22.8

22.9

23.0

23.1

23.2

23.3

23.4

23.5

23.6

(ips)

SPEED

MAIN REG

DISPLAY

ED
EE
EF

F0
F1
F2

F3

roo

FAST

ACTUAL

SPEED

23.7

23.8

23.9

24.0

24.1

24.2

24.3

2441-1

(ips)

If

the

rewind

speed

is

not

approximately

within

8"

tolerance,
of

the

tape

the

and

transport

stop.

will

automatically

b. Note

c.

d.

11.

Perform

a.

the
associated
direction

Depress
ant

speed

Repeat
times
Note

the

the

steps

to

reverse

NOTE:

Depress

will

rewind

stop.

The

depending

When
hex

the

digits
Address
DISPLA Y
for

the

conversion

speed

and

Motor

(CW

release

displayed

Control

decreases

the

displayed.

lOb

and

10c
indicate
speed

The
performed
is

and

the

system

upon

transport

by

Bit

switch

that

the

displayed.

Speed

reverse

Test

Speed

until

within

release

the

specified

the

tape

approximately

buzzer

the

test

results.

stops,

the

Data/Address

Indicators 8 through

is

in

the

of

these

and

adjust

PWA

speed,

START

until

(RO

CCW
pushbutton

the

transport

as

follows:

Test

the

forward

tolerance.

START

will

pushbutton

buzz

Refer

its

exact

Bit

11

MAIN REG

two

hex

the
J1

or

increases

system

speed

cannot

lower

potentiometer

R/W

J1)

and

observe

buzzer

is

within

be

in

speed).

buzzes

tolerance.

speed

8"

in a reverse

once,

speed

to

twice,
the

will

twice.

note

The

direction

or

in

be

displayed

Indicators 0 through

will

not

function

position.

digits

into

Refer

transport

the

transport

three

step

since

to

on

required

the

result-

three

and

times

lOa.

as

7.

Data/

the

Table

speeds.

the

two

6-10

12.

If
advance

b.

Note
the
quired

c.

Depress
ant

d.

Repeat
times
Note

Once
port

steps

speeds

START

NOTE:

the

speed

the

the

speed

associated

direction

and

speed

displayed.

steps

to

indicate

the

speed

10

and

can

alternately

pushbutton

During
of

the

STAR T
transfer
3FC

to

(forward

Speed

Test).

is

not

within

tape

approximately

displayed

Motor

(CW

release

llb

and
that

displayed.

11

have

twice

the

each

Speed

pushbutton

from

the

the

hex

Speed

tolerance,

and
Control
decreases

the

START

11c

until

the

transport

been

completed,

be

verified

time

Test a dual

hex

"test

"starting

Test)

or

the

8"

and

adjust

PWA

the

(RO

speed,

pushbutton

the

system

speed

by

depressing

the

transport

depression

is

required
end

address"

addresses"

38A

(reverse

transport

stop.

upper
J1

or

CCW

buzzer

is

the

forward

to

35A

will

potentiometer

R/W

J1)

increases

and

observe

buzzes

within

tolerance.

and

and

releasing

stops.

automatically

on

in

the

re-

speed).

the

result-

three

reverse

trans-

the

2441-1

6-25

13.

14.

If

the

initial

than

21. 7

ips

test

beginning

If

testing a dual

Speed

Test.

speeds

(hex D9)

with

station

displayed

or

faster

step 4 to

system,

and

than

again

noted

verify

select

in

24.3

the

steps

ips

the

other

lOb

(hex

speeds.

transport

or

F3),

11b

rerun

and

were

the

rerun

slower

entire

the

6.15.6 Normal Write

Perform

the

1.

Normal

Install
tests.

NOTE:

2.

Select

3.

Place a "scratch"

NOTE:

Forward

Write

the

Forward

PDA

The follOWing

indicated
TEST

Mode.

DISPLAY

All

the

R/W

If

after
transport
should
the
reclosing.

Test

as

outlined

pOSition:

MODE

Address

as

the
cassette

placing a tape

and

immediately

motors

Test

switches

Bit

active

clOSing

have

as

follows:

in

paragraph

should

Switches

transport

into

the

cassette

the

reopen,

stopped

6.2

be

as

R/W

transport.

door,

wait

turning

and

perform

set

to

the

up

(TEST

LOOP

MAIN REG

"~"

state

outlined

into

the

the

door

until

before

MODE)

(down

in

paragraph

all

preceding

position)

6.15.

6-26

4.

5.

6.

Set

in

the

steps
Set

8a

the

Mode SWitch

Depress
matically
a

forward

the

NEaT

hole

at

the

sist

of

an

any

manner.

compared

of

the

test,

will

be

displayed

Failure
inate.

on

the

PDA

required

(from
none
test

NEaT

of

was

hex

"starting

through

and

release

rewind

direction
hole

at

other

alternating

This

against

the

to

compare

If

the

CHECK

to

extinguish

to

extinguish

hole

the

"error

successful.

8f.

to

RUN.

the

the

tape,

at

the

the

beginning

end

of

bit

bit

pattern

the

expected

transport

with

the

while

lamp

to

NEaT

address"

address"

START

if

required,

normal

the

tape

pattern

will

STOP

writing

illuminates,

the

lamp.

the

CHECK

hole).

listed

32f1

pushbutton.

speed

of

the

is

reached.

(10101010)

is

read

bit

pattern.

stop

and

lamp

will

Note

lamp

If

this

in

as

outlined

The

then

it

will

(20

ips).

tape

and

continue

The

which

immediately

Upon

the

hex

"test

illuminated.

cause

the

depress

the

number

during

number

Table

6-11

in

paragraph

transport

advance

Writing

data

written

is

not

after

successful

end

CHECK

the

RESET

of

the

entire

is

less

were

6.2,

will

the

tape

will

begin

until

the

will

formatted

writing

completion

address"

lamp

to

pushbutton

times

it

writing

than

eight

displayed,

auto-

in

at

NEaT

con­in

and

is

2F4

illum-

was

sequence

and

the

2441-1

If

this

have

are

still

errors

number

been

excessive,

are

esceeds

detected.

again

detected,

eight,

Replace

replace

an

excessive

PWA

PWA 17

replace

R/W

and

PWA

number

J2

rerun
19

and

and

rerun

the

test.

rerun

of

data

the

the

errors

test.

If

excessive

test.

If

will

errors

Table

NOTE:

6-11.

During
to
an

while

Normal

this

test,

run

providing

opportunity

it

makes

Write

Forward

the

system

the

Service

to

troubleshoot

data

errors.

"Error

will

Engineer

the

Addresses"

ERROR ADDRESS CONDITION

Read

Only

Tape

00F

2D3

2ED

2F7

3DA

3F9

39C

Cassette

Servo

NEOT

Not

Unsafe

Not

Unselected

Selected

Write

Transport

Current

Detected

in

in

Place

Transport

Not

continue

with

system

Transport

Active

Not

Active

Present

2441-1

6-27

CHAPTER 7

ERROR ANALYSIS

7.1 GENERAL

This

chapter

the

by

according

7.2 RECOMMENDED TROUBLESHOOTING SEQUENCE

Service

contains

to

priority.

1.
paragraph

2.

the

Engineer.

Perform

Perform
graph

2.3.2.

recommended

Table

Table

the

2.3.1.

the

7-1

7-2

Power

System

troubleshooting

lists

those

provides

Supply Voltage

Diagnostic

transport

PWA's

Checkout

Checkout

sequence

which

troubleshooting

procedure

procedure

that

most

should

likely

as

are

information.

as

outlined

outlined

be

followed

affected

in

in

para-

NOTE: Since

and

each
expand
the

routines

lowing

each

routine

verified

the

PDA's

must

order:

• ROM

•

Branch

•

Branch

• PDA

•

G-Registers

•

H-Registers

• ALU

•

Buffers

•

Data

•

Data

•

Keyboard

•

Printer

•

Transports

a.

Run
b. Run
c.

Run
d. Run
e.

Speed

f.

Write

verifies a specific

function

overall
be

Test

Test

on

Test

Test

Test

Bus

Out

Bus

In

Test

Forward
Reverse
Forward
Reverse

Strobe

Tests
Forward

is

used

test

performed

Data

Test

Test
Test

Test

Test

Test

Tests

Normal

Normal

Fast

Fast

function

to

further

capabilities,

in

the

fol-

Test

Test

Test

Test

Normal

Test

Once
a
adjustment.

If

If

Register

all

given

during

(Printer

during

tests

routine

the

Interface).

the
displays

2441-1

have

to

exercise

If

so

Printer

Speed

rJrJ,

been

performed,

or

deSired,

Test, a printer

Tests,

proceed

the

replace

it

may

be

desired

observe a specific

as

outlined

problem

transports

PWA 18 (Read Decode)

are

in

is

evident,

too

function

paragraph

slow

to

and

in

directly
or

to

6.2,

replace

the

Main

the

Read/Write

enter

make

step

PWA 1

an

8.

7-1

Table

7-1.

PWA's Affected According to

Priority

a:

w

'"

0 0

0

....

M

N M

'"

~

8

~

8

~

co

'"

'"

M M

M

M

8

8

v

v

g

;z

::;

0

0

If

'"

v

..,.

M

co

M

co

M

M M

0

co

~

co

v

...

....

.... ....

....

....

"'

....

'"

....

....

....

....

....

I I t I t

'"

'"

~

'"

~

III

t

I

:>

M

M

V V

...

V

M

M M

M

M

M M

M M

M M M

M

I

t

t

t

t

III

III

M

M

I

I

Z

(;

(;

(; 0 (;

(;

(;

(;

(; (;

(;

(;

(;

(;

(; (;

(;

(; (;

(;

I

t

t

t

§

§

(;

(;

(;

(;

I

I

;

ALSO AFFECTED

IS

THE

f-

'"

III

'"

'"

'"

'"

'"

'"

'"

III

~

III

"'

'"

~

III

'"

'"

III

'"

'"

'"

III III

NOTES

(1)

a:

....

....

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

....

....

....

....

....

....

....

....

....

....

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

....

....

....

....

ASSOCIATED DISPLAY PANEL

<{

"-

(2)

CHECK

FOR

BURNED OUT

(J)

a:

...J

~

0

w

~

...J ~ ...J w

LAMPS

~.

::;

::;

::;

::;

(J)

(J)

f-

e

a

~

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w

...J

e:

a

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a

f-

I

<{

<{ <{

(J)

w

(J)

a:

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a a:

z

a:

a:

(J)

(3)

CHECK CIN SWITCH

AND

NEOT

oW

u

<{

a: a:

e:

f-

a:

I~

0

0 0 0

0

0

f-

w

0

a:

u

a:

a:

a:

a:

wa:

(3

a:

w

w

w w w

w

f-

a

f-

~

a:

a:

w~

o·

a:

w

Ow

Z

I~

a:.

SENSOR

w w

<{<{

...J~

g

'"

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w

g

g

8~

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0

(J)

(J)

(J)

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(J)

z z

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(J)

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f-

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f-

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u

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u

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z

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a:

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f-

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f=

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a.

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a.

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a:

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a a a a

a

a..

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a:

a:

a:

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wf-

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w

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f-

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a:

f-

HEX ADDRESS

<{

N

~

N

I I

t

TEST

s:

1

2

3

4

5 6 7 8 9 10

11

12

13

14

15

16

17 18 19

20

21

22

23

24

25

26

27

28

(3

(3

~

I

I t

STARTING

TEST

END

"-

a:

a:

a:

a:

t

t t

---

---

ROM

3

1 1 1

1

2

000

013

BRANCH

3

4

1 2

019

OF7

BRANCH

ON

DATA

3

4

5

6 2 1

048

04F

PDA

1 1

050

OAE

G·REGISTERS

3 4

5 6 2 1

OAF

OE4

H·REGISTERS

3

4

5 6 1 2

OE6

lBB

ALU

3

4 5

6 2 1

lBC

272

BUFFERS

3

4

5 6

1

2

1

2

281

28F

DATA

BUS

OUT

1

(S

E~

~)T

2)

2

290

295

DATA

BUS

IN

1

(S

E~

OT

11

2

2

296

2D9

KEYBOARD STROBE

1

2

3AO

3Bl

PRINTER

1

2

2CO

2F4

RUN FORWARD

NORMAL

(S E OT

3)

3

3

1 2 1 2

4

2C4

2F4

RUN REVERSE

NORMAL

(S

E OT

31

3 3

1

2

1

2

4

2C8

2F4

RUN FORWARD FAST

(S

E

OT

3)

3 3

1 2 1

2

4

2CC

2F4 RUN REVERSE FAST

(SEE

OT

3)

3 3

1 2

1 2

4

34E

3FC

SPEED

(S

E OT

31

3

4

3

4

1 2 1

2

5

320

2F4

WRITE FORWARD

2 3 1 4

NORMAL

P8000128

transport

If

during

upon,

replace

or

the

PWA 21

Write

PWA 19

(Read

Forward

(Write

Decode)

Normal

Encode).

in

the

Test,

Read

the

Only

tape

transport.

cannot

be

written

PROBLEM

Transport

excessively

excessively

Transport

ing

tapes

speed

fast

slow

is

or

noisy

is

or

break-

Table

7-2.

Place a "scratch
and

perform
steps 1 through
the

same
ment.
the

supply
supply
spool,
latter
riate

cases,

potentiometer

contain

1600

FCPI
perform
speeds.

The

motor
above.
associated

Troubleshooting

cassette"

the

Speed

6. If

amount

If

the

spool,
spool
the

speed

of

take-up

the

has

noticeably
is

course

approximately

test

cassette

the

If

entire

may

this

Motor

be

does

Control

Speed

running

Chart

SOLUTION

into

Test

as

both

spools

tape,

spool

speed

the

has

is

more

excessively

align

the

and

rerun

the

same

into

the

Test

excessively

not

solve

PWA.

the

selected

outlined

contain

speed

is

within

noticeably

excessively

tape

than

slow.
speed
the

by

test.

amount

selected

to

fine

align

the

problem,

transport

in

paragraph

approximately

course

more

fast.

the

take-up

In

either

adjusting

When

of

both

tape;

transport

the

transport

fast.

See

replace

6,15,5,

align-

tape

than

If

the

of

the

the

approp-

spools

place

and

solution

the

two

a

Cannot

cassette

STA TUS

DB-M

2441-1

write

Is a large

Is a large

on

a

dot

dot

Check

(CIN)
left-hand
opening.
the

other

PDA

to

OR,

PWA

OR,

PWA's

the

File

switch.

side

The

is

the

These
of
left

troubleshoot

IS

affected--output

affected--output

Protect

the

transport

most

Cassette

the

input

switch

switches

switch

In

Place.

transport.

1,

4,

1,2,3,13,14,15,16,17,

input

11,

and

are
just

is

2,

the

located

inside

the

If

3,

4,

Cassette

in

of

File

Protect,

found

13, 15,

the

the

ok,

In

upper

door

use

17,

Place

and

the

and

and

20

20

7-3

CHAPTER 8

REPLACEMENT

8.1

GENERAL

This

chapter

printer,

tions

plate

sette

8.2 PRINTER REMOVAL AND INSTALLATION

Use

for

assembly,

in

the

contains

keyboard,

the

various

place

and

following

1.

Ensure
cord

2.

Tilt

3.

Depress

writer.

4.

Raise
RIGHT

those

and

transports.

subassemblies

motors,

file

protect

procedure

that

from

the

typewriter

the

the

and

procedures

door

latch

switches.

for

the

POWE R

the

115

two

platen

left-hand

TAB

CLEAR/SET

recommended

Also
that
solenoid,

removing

switch

Vac,

60Hz

platen

release

lever

provided

comprise

and

cover

switch

PROCEDURES

for

removing

are

removal

the

transport,

BOT/EaT

installing
is

set

power

upward

levers

bank

levers.

source.

to

to

and

that

sensor

the

printer.

OFF,

expose
lift

supports

and

i.

assembly,

then

the

the

platen

and

installing

installation

e.,

the

disconnect

platen.

from

the

MARG

head

and

the

the

LEFT/

the

instruc-

mounting

the

cas-

power

type-

5.

Raise
and

6.

Pull
case

7.

Disconnect
and

8.

Tilt

9.

While

center

10.

11.

8.3 KEYBOARD REMOVAL AND INSTALLATION

Use

the

following

1.

Carefully,
Reverse

Ensure

cord

2.

Tilt

the

right-hand

10/12

levers.

forward

from

Lever

the

the

Switch

typewriter

supporting

of

each

the

procedure

that

from

the

the

typewriter

on

the

typewriter.

the

Printer

Interface

the

rubber

lift

the

procedure

for

removing

the

POWER

115Vac,

lever

two

Interface

upward

printer,

foot.

printer

when

60Hz

cover

switch

upper

case

connector A 7P4.

and

rest

remove

from

installing

and

installing

switch

is

power

upward

bank

that

supports

release

levers

connector A 7P1,

it

on

its

rear

the

four

the

case.

the

printer

the

keyboard.

set

to

OFF,

source.

to

expose

the

and

Power

panel.

screws,

into

then

disconnect

platen.

the

SINGLE/DOUBLE

remove

the

connector A 7P3,

located

the

in

typewriter

the

upper

the

case.

power

3.

Depress

the

writer.

2441-1

two

platen

release

levers

and

lift

the

platen

from

the

type-

8-1

4.

Raise
RIGHT and TAB

5.

Raise
and

10/12

6.

Pull

forward

case

from

7.

Disconnect

8.

Tilt

the

9.

While

keyboard

the

left-hand

the

right-hand

levers.

on the two

the

typewriter.

the

Keyboard

typewriter

supporting

and

carefully

lever

switch

CLEAR/SET

lever

switch

upper

Interface

upward

the

keyboard,

lift

and

it

bank

levers.

case

rest

remove

from

that

bank

release

edge

it

on

the

case.

supports

that

supports

levers

connector

its

rear

the

four

the

MARG

LEFT/

the SINGLE/DOUBLE

and

remove

the

A 7P2.

panel.

screws

that

secure

upper

the

10.

Reverse

this

procedure

when

installing

case.

8.4 TRANSPORT REMOVAL AND INSTALLATION

REMOVAL

Use

the

following

1.

2.

3.

4.

5.

procedure

Ensure
cord

Remove
edge
them

that

from

both

of

each

up and

Disconnect

(PWA17)

Tape
Loosen

to

the

Loosen
Label

to

Read

the

terminal

each

each

for

removing a transport

the

POWER SWitch

the

115Vac, 60Hz

side

access

panel

away

the

Tape

Only

three

and

from

internal

Read/Write

(RO

screws

strip,

of

the

five

as

it

is

removed.

is

power

panels

pulling

the

it

frame.

interconnection

(R/W

J2).

that

secure

located

on

front-most

Refer

set

source.

from
away

J2)

the

left-hand

terminal

to

from

to

the
from

or

the

the

keyboard

OFF,

console

the

cable,

RO

clear

Table

the

console.

then

frame

i.

e.,

Tape

plastic

side

screws

8-1.

into

the

disconnect

by

grasping

structure.

R/W

Control

terminal

of

the

transport.

and

remove

typewriter

the

the

Tape

Control

(PWA20)

board

power

lower

Lift

each

to

cover

lead.

NOTE:

8-2

These
cage
power

leads

to

the

to

run

terminal

the

transport.

from

the

strip

top

and

of

the

supply

card

2441-1

Table

8-1.

Transport

Power

Connections

6.

TERMINAL

Remove
frame.

1
2

3

4
5

6

7

8

the

four

There

When

the
use
pins

screws

are

two

removing

left-hand

care

so

on

connectors

that

secure

screws

on

CAUTION

the

two

side

of

the

as

not

to

damage

J1

VOLTAGE

No

+5.12
+15

-15
No
+24 Vdc
No
Ground

the

each

screws

transport,

and

J2.

Connection

Vdc
Vdc
Vdc

Connection

Connection

cassette

side

of

the

on

the

mounting

transport.

brackets

to

the

7.

INSTALLA TION
Use

the

following

1.

2.

Remove

them

3.

the

4.

Align
with

5.

6.
either

Carefully
door

clears

slide

the

procedure

Ensure
cord

that

from

the

the

both

edge

of

each

up

and

away

Carefully
so

that

center

the

the

slide

the

window in

of

four

holes
Place a screw
Position

the

side

transport

of

the

transport

frame.

for

installing a transport

POWER

115Vac,

side

access

panel

from

the

the

opening.

slots
in the

in

each

and

switch

60Hz

panels

pulling

the

transport

the

door

in

the

cassette

frame.

and

loosely

frame.

side-to-side

the

transport

toward

is

power

it

into

is

door,

the

set

to

source.

from

away

the

console

toward

mounting

tighten.

so

then

rear

into the

OFF,

the

console

from

the

that

there

tighten

of

the

console.

then

the

frame

from

top

and

bracket

all

console

disconnect

by

grasping

structure.

the

rear.

the

door

(two

is

an

equal

four

screws.

until

on

the

the

the

lower

Lift

Position

is

aligned

each

side)

space

power

it

in

at

2441-1

8-3

7.

8.

NOTE:

Connect
the

appropriate

Connect

to

Tape

Only

(RO

If

there

top

and

two

screws

port

that
mounting
transport

an

equal

the

transport

screws.

opens

the

five

with

leads,

terminal

the

internal

Read/Write

J2).

is

not

an

bottom

secure

on

of

either

the

brackets.

up-and-down

space

at

door,

Ensure

no

interference.

removed

and

connection
(R/W

J2)

equal

the

space

door,

side
transport
Reposition

so

the

top

then

that

the

in

secure

cable,

or

RO

at

loosen

of

the

to

the

that

there

and

bottom

tighten

transport

step 5 of

in

place.

i.

e.,

Tape

Control

the

the

trans-

the

all

four
door

the

R/W

is

of

removal

Tape

(PWA20)

procedure,

Control

to

Tape

to

(PWA17)

Read

8.4.1

Head

REMOVAL
Use

the

following

Assembly

1.

Remove

2.

Remove
(See

them

NOTE:

The RO

have

READ ONLY

PIN

Removal

procedure

the
the

Table

off

8-2)

the

If

the

ness.

will

two

coaxial

Table

and

Installation

for

removing
transport
head

by

end

as

assembly

grasping

of

the

pins.

necessary,

coaxial

cable

have a single

cables

8-2.

Head

COLOR

the

head

outlined

coaxial

the

Label

cut

any

to

the

coaxial

(read

head

Assembly

assembly

in

paragraph

cable

body

of

each

ties

that

transport

cable

and

Connections

from

the

as
secure

(read

write

from

8.4

the

pin

connectors

it

is

har-

head),

head).

PIN

the

transport.

(Removal).

pins

of

connector

and

removed.

while

the

READ/WRITE

sliding

R/W

will

COLOR

J2

J2-1
J2-3
J2-5

8-4

red

white

shield

~

<

r£I

p::;

r£I

E-l

~

p::;

~

J2-1
J2-3
J2-5

J2-29

J2-33

J2-35

red
white

shield
shield
red
black

2441-1

3.

4.

Remove

each

on

Remove

the

side)

the

cassette

that

secure

hinge

pin

holder

it

by

pushing

faceplate

to

the

cassette

it

by

removing

through

holder

the

cassette

the

four

assembly.

holder.

screws

(two

INSTALLA

Use

the

following

5.

TION

1.

2.

3.

4.

5.

NOTE:

Remove
that

secure

procedure

Remove
in

paragraph

Ensure

holes

NOTE: Do

Hold

that

of

the

mounting
Slide

long
Ensure

holder
and

the

flat

the

that

and

cassette

Retain

the

head

the

for

the

transport,

8.4.1

the

the

head

not
must
holder.

cassette

slots

head

mounting

side

positioned

the

that

the

mounting

head

installing

(Removal).

two

screws

mounting
tighten

pass

holder

face

up.

two

screws

the

lock

holder.

spring

washer.

plate

mounting

the

cassette

with

plate

these

into the

so

that

plate

up.

are

washers

assembly

plate

head

assembly

mounting

holder

lock
assembly.

screws

slots

of the

the

head

assembly

positioned

are

positioned

by

faceplate,

washers

as

they

cassette

mounting

into

in

loosening

to

the

plate

and

are

started

the

cassette

the

slots

between

the two

cassette

assembly

hinge

plate

assembly

holder

of

the

the

holder.

into

pin

into

cassette

screw

screws

the

as

outlined

the

mounting

with

heads

transport.

the

2441-1

6.

7.

8.

9.

10.

11.

12.

Carefully
into the

the

Tighten

cassette

tape

the

cassette

NOTE:

Remove
spring

the

washer

Assemble

pin

through

Replace

the

step 3 of
Reconnect
Replace

the

slide

guide

pins

two

holder.

Ensure

hand

bly

is

holder.

Cassette,

the

cassette

to

hold

cassette

the

removal

all

wiring

transportas

the

holder

screws

that

side

against

into

Cassette,

and

on

either

to

the

protrusion

of

the

the

Motor,

the

hole
holder

the

assembly

holder

procedure.

as

outlined

outlined

Motor,

align

side

secure

head

mounting

latch

and

in

the

to

faceplate

and

the

head

of

the

head

the

head

on

side

of

Sensor

right-hand

the

cassette

in

place.

using

in

step 2 of

in

the

installation

Sensor

such

Adjustment

that

mounting

mounting

the

right-

plate

the

assem-

cassette

Adjustment

tab

of

main

the

four

the

removal

procedure

the

plate

plate

Tool

the

cassette

frame

screws

Tool

tool

wiil

assembly.

assembly

and

place

main

and

push

removed

procedure.

in

paragraph

PiN
slide

to

the

the

88016036

into

the

frame.

hinge

in

8.4

8-5

8.4.2 Motor

REMOVAL
Use

the

following

1.

Removal

procedure

Remove

and

Installation

the

for

removing a motor

transport

as

outlined

from

in

paragraph

the

transport.

8.4

(Removal).

2.

3.

Unsolder

4.

INSTALLA TION
Use

the

following

1.

With the

2.

Release
Sensor

3.
Insert

4.

Alternately,

place.

Remove
on

each

Remove

the

side)

the

procedure

transport

(Removal),

removed.

NOTE:

the

Adjustment

Latch

the

PiN

cassette

that

and

remove

two

for

install

Do

not

cassette

cassette

70015833

tighten

holder

secure

the

screws

installing

and

motor

the

new

tighten

holder

PiN

holder

over

the

faceplate

it

to

the

leads

that

secure

the

motor

on

removed

motor

these

screws.

and

88016036

back

into

the

shaft

two

motor

by

cassette

the

motor.

the

motor

into

as

by

replacing

carefully

into

place.

place
of

the

screws

removing

holder

Label

to

the

the

transport.

outlined

the

slide

the

and

place a Motor

motor.

until

the

the

four

assembly.

each

as

cassette

in

paragraph

two

screws

Cassette,

motor

screws

it

is

removed.

main

8.4.2

previously

Motor,

Positioning

is

secured

(two

frame.

and

in

8-6

5.

6.

7.

8.

9.

10.

NOTE:

Remove
Release

and
Replace

screw.
Replace

the
the

Sensor

the

Ensure

the

removed.
Reconnect

Replace

the

The

Motor

slide

on

and

with

no

interference

screws

have

Motor

cassette

Adjustment

drive

coupling

that

cassette

all

wiring

transport

Positioning

off

of

been

Positioning

holder

and

Tool.

on

the

set

screw

holder

as

as

faceplate

outlined

outlined

Insert

the

motor

once

the

tightened.

Insert.

carefully

the

shaft

is

in

step 3 of

in

the

must

shaft

motor

remove

of

the

on

the

using

installation

motor

flat
the

the

the

and

side

of

four

screws

removal

procedure

Cassette,

tighten

the

motor

previously

procedure.

Motor,

the

set

shaft.

in

paragraph

2441-1

8.4.