Omron 8025G Manuale utente

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;..

MAINTENANCE

MANUAL

8025

CRT

TERMINAL

MAINTENANCE

MANUAL

OMRON

CORPORATION

AMERICA

INFORMATION

PRODUCTS

DIVISION

432

TOYAMA

DRIVE,

SUNNYVALE,

CA.

94086

(408) 134-8400

TWX

910-339-9341

OMRON

88-036-XXX

information contained

herein

may

reproduced

disseminated

any person

company

without

the

express

written

permission

Omron

Corporation

America. Information Products

Division.

October 1,

1975

(U)

FOREWORD

This manual

gives

accurate,

usable

information

help

you

get

the

best

service

from your

8025

CRT

Terminal.

supplies

you

with

the

details

needed

to:

•

become

thoroughly

familiar

with

the

8025

•

operate

the

8025

understand

how

the

8025

operates

•

service

the

8025

have taken

care

make

this

manual as complete,

accurate,'

and under-

standable

possible.

Your

comments

and

suggestions

for

increasing

its

quality

and

effectiveness

will

be most welcome. A

convenient,

pre-addressed

"Publication

Change

Request" form

for

this

purpose

provided

the

page.

receive

updated

materials,

~our

manual must be

registered

with

Omron.

pre-addressed

form

also

supplied

for

this

purpose.

(iii)

TABLE

CONTENTS

SECTION

PAGE

List

Figures

xiv

List

Tables

xvi

1 General

Information

· · · · · 1-1

_1.1

General

Description

· · · · · 1-1

1.1.1

Functional

Description

1-1

1.1.

2 Mechanical

Description

1-2

1.1.

Basic

Operation

1-3

1.2

Specifications

· · · · · . . . . . . . . . 1-4

2.1

Standard

Terminal

Specifications

1-4

1.3

Warranty

Information

· · · · . .

1-8

1. 3.1 Claim

for

Transit

Damage

1-8

3.2

Statement

RON

Warranty

1-8

1. 3. 3 Warranty Claims

Against

OMRON

1-8

1. 3. 4

OMRON

Designated

Facility

1-9

3. 5

Suppliers

Warranties

1-9

1.4

Repair

and

Return

Equipment

1-10

4.1

P"olicy · · · · · · · 1-10

4.2

Equipment

Failure

· · ·

1-10

4.3

Non-repairable

Determination

1-10

1.4.4

Equipment Return

Procedure

1-10

4.5

Packing and Packaging

Procedure

1-10

1.5

List

OMRON

Mnemonics 1-12

Installation

and Checkout 2-1

2.1

Unpacking

Procedure

2-1

2.1.1

Inspection

2-1

2.1.2

Unpacking · 2-1

•

2.2

Off-line

Checkout 2-2

2.2.

1 Mechanical

Inspection

2-2

2.2.2

Operational

Check . . . . 2-7

2.3

Installation

. · · · · · · 2-7

2.3.1

Physical

Requirements · . . . .

2-7

2.3.2

Electrical

Requirements

2-7

2.3.3

External

Connections

2-8

2.3.4

RS-232 Speed Adjustment 2-8

2.4

On-line

Checkout · · · · · · · . . • . 2-8

Ox)

SECTION

TABLE

CONTENTS

(continued)

Operating

Instructions

3.1

Operating

Controls.

3.1.1

On-Off

Switch.

3.1.2

Brightness

Control

3.1.3

Baud

Rate Switch

3.1.4

Parity

Switch

. . .

3.2

The

Display

Screen.

3.3

Audio

Indicators.

3.4

3.5

3.6

3.3.1

The

Click

Sound

3.3.2

The Beep Sound

Visual

Indicators

Basic

Operating

Modes

3.5.1

KSR

Mode

3.5.2

ASR

Mode

. . . .

Keyboard

Keys

3.6.1

3.6.2

3.6.3

3.6.4

3.6.5

3.6.6

3.6.7

Operating

Features

"Typewri

ter"

Keys

. .

Numeric Pad

Keys

Escape

(ESC)

and

Control

(CTRL)

Keys

Cursor

Control

Keys

. . . . • • .

Next Line

(.J)

Key

. . . . .

Function

Keys

and

Indicators

3.7

I~dividua1

Key

Descriptions

3.7.1

A1phanumeric-Punctuation-Symbo1

3.7.2

Store

Input

Key/Indicator

...

3.7.3

Storage

Transmit

Key/Indicator

3.7.4

KSR

Mode

Key/Indicator

3.7.5

Key

3.7.6

Store

Key

...

3.7.7

Read

Key

...

3.7.8

Keyboard

Disabled

Indicator.

3~7.9

Received

Parity

Error

Indicator

3.7.10

Frame Transmit

Key

3.7.11

Local

Copy

Key/Indicator

3.7.12

Break

Key

..••

3.7.13

Reset

Key

...•.

3.7.14

Screen

Erase

Key

3.7.15

Control

(Cl'RLJ

Key

3.7.16

Shift

Key

3.7.17

Lock

Key

3.7.18

Space

Bar.

3.7.19

Tab

Key.

3.7.20

Line Feed

Key

(x)

Keys

3-.

3-,

3-:

(-{

'C~',)-i

•

3-L1

3-4

3-5

3-6

3-7

....

3-7

. .

Ii.

....

3-8

SECTION

TABLE

CONTENTS

(continued)

3.7.21

Carriage

Return

(CR)

Key

3.7.22

Delete

(DEL)

Key

..•.

3.7.23

Backspace

(BS)

Key

3.7.24

Cursor

Control

(HOME

and Arrow)

Keys

3.8

Operating

Procedures

.....

3.8.1

3.8.2

Turning

the

Terminal

and

Off

Clear/Reset

Functions

4 Theory

Operation

4.1

Terminal Block Diagram

Analysis

4.1.1

Timing,

Control,

and Data

Signals.

4.1.2

Typical

Operating

Sequences

..•

4.2

8025

CRT

Terminal

Input/Output

Structure

4.2.1

4.2.2

4.2.3

Memory

Cards

. . . . . . . .

Program-Processor

Controlled

I/O Cards

DMA

Transfer

I/O

Cards

4.3

Character

Generation

....

4.3.1

4.3.2

Upper Case

Characters

Lower

Case

Characters

4.4

Card/Section

Descr"iptions

4.4.1

Power Supply

4.4.2

CRT

Display

....

4.4.3

Timing

Control

Card

4.4.4

Processor

Card

4.4.5

PROM

Card

.....

4.4.6

Buffered

RAM

(Refresh)

Memory

Card

4.4.7

Refresh

Buffer

Card.

4.4.8

Refresh

Control

Card

4.4.9

Cursor

Control

Card

4.4.10

Video

Control

Card

4.4.11

The Keyboard

4.4.12

RS-232

Interface

Card

4.4.13

Terminator

Card

...

5 (Not

Applicable

8025G

Terminal)

6 Maintenance and

Repair

6.1

Preventive

Maintenance

Obj

ecti

ve . . • .

6.1.

6.1.2

6.1.

6.1.4

Required

Equipment and

Materials

General

Procedure

Specific

Procedures

. .

(xi)

. . . .

PAGE

3-8

3-11

4-1

4-4

4-6

4-16

4-17

4-20

4-21

4-23

4-29

4-39

4-45

4-47

4-48

4-56

4-58

4-62

4-67

4-71

4-79

6-1

6-2

SECTION

TABLE

CONTENTS

(continued)

6.2

Field

Maintenance

6.2.1

6.2.2

6.2.3

6.2.4

6.2.5

Objective

..•.•.

Required Equipment

Rules

Good

Maintenance . . .

Field

Troubleshooting

Procedure

. .

Removal and Replacement

Procedures

6.3

Bench Maintenance

6.3.1

6.3.2

6.3.3

6.3.4

6.3.5

"'-6.3.6

6.3.7

6.3.8

Adjustments

Objective

.•.....•..••

Required Equipment and

Materials

Rules

Good

Maintenance .

Replaceable

Parts

. . . • . . • .

Workmanship . • . . . . • • • • . .

General

Troubleshooting

Procedure

Specific

Troubleshooting

Procedures

Removal and Replacement

Procedures

7.1

Required Equipment

7.2

7.3

7.4

V dc

Regulated

Output

Click/Beep

Volume

CRT

Disp1ay.Adjustments

7.4.

7.4".2

7.4.3

7.4.4

7.4.5

7.4.6

7.4.7

7.4.8

Preliminary

Procedure

+55

(B+)

Adjust

Video Gain

.•

• . • .

Vertical

Adjustments

Horizontal

Adjustments

Centering

Adjustments

Yoke

Adjustments

Focus . . • • .

8 Drawings

CUl'sor

Control

Display

Monitor

Keyboard . .

L.E.D

....

Mother Board

Power Supply

Processor

Card

PROM

Card

RAM

Card

..•

Refresh

Buffer

Card

Refresh

Control

Card

Regulator

Card .

RS-232

Interface

Card

(xii)

•

. "

PAGE

6-3

6-4

6-13

6-19

.6-19

6-19

6-20

6-21

6-22

6-52

7-1

7-2

7-3

7-5

7-12

8-1

8-3

8-5

8-7

8-9

8-11

8-15

:~"

8-21

8-27

SECTION

Terminator

Card

Timing

Control

Card

Video

Control

Card .

TABLE

CONTENTS

(continued)

9 Component

Parts

List

. . • .

Cursor

Control

Card

Keyboard

•.

• •

L.E.D

...•

Mother Board

Power Supply •

Processor

Card •

PROM

Card

RAM

Card

..•

Refresh

Buffer

Card

Refresh

Control

Card

Regulator

Card . • •

RS-232

Interface

Card

Terminator

Card

Timing

Control

Card

Video

Control

Card

References

10.1

EIA

Standard

RS-232.C

10.1.1

Transmit

Vata (BA),

10.1.2

Receive Vata (BB),

10.1.3

Request

Send (CA),

10.1.4

Clear

Send (CB),

5 .

10.1.5

Data

Set

Ready (CC),

10.1.6

Received Line

Signal

Detector

(CF), Pin 8 .

10.1.7

Data .Terminal Ready (CD),

10.1.8

Ring

Indicator

(CE),

10.2

ISO

Character

Assignments

10.2.1

Mne~onics

and

Their

Definitions

10.2.2

The

ASCII

Code

10.2.3

Tape Track Assignments

List

Abbreviations

Glossary

(xi

it)

PAGE

8-29

8-31

8-33

9-1

. . .

9-3

9-4

9-5

9-6

9-7

9-9

9-11

9-12

9-13

9-14

9-15

9-16

9-18

10-1

. 10-1

10-2

10-3

10-4

10-5

A-I

G-1

FIGURE

1-1

1-2

1-3

1-4

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

3-1

4-1

4-2

4-3

4-4

4-5

4-6

4-7

4-8

4-9

4-10

4-11

4-12

4-13

4-14

4-15

4-16

4-17

4-18

4-19

LIST

FIGURES

Keyboard arrangement • • • • •

Exterior

8025

CRT

terminal

Interior

8025

CRT

terminal

8025

CRT

terminal,

simplified

block diagram

Cabinet mounting screws

(front)

Cabinet mounting screws

(rear)

. • • • • •

. . . .

CRT

display

high

voltage

circuits

(mounted below Monitor

Deflection

Board)

•••

• • , • • • •

Printed

circuit

card

locations

• • •

Monitor

Deflection

Board connections (viewed from

top

terminal)

•

Flat

cable

connections

• • • • • •

Flat-line

connector

configurations

•

8025

CRT

terminal:

rear

panel

connectors

8025

CRT

terminal

keyboard • • • • •

8025

CRT

terminal

block

diagram

Example

upper

case

character

(H)

Example

upper

case

character

(V)

Example

lower

case

character

(h)

Example

lower

case

character

(p)

Power supply

block

diagram

CRT

display

block

diagram

CRT

waveforms

Timing

control

card

block diagram

Timing

control

card

timing

diagram .

Timing

control

card

timing

diagram

Processor

card

block

diagram • • . •

Processor

card

(CPU)

timing

diagram

Buffered

PROM

board

block

diagram •

Buffered

RAM

memory

card

block diagram •

Refresh

buffer

card

block diagram

Refresh

buffer/control

card

timing diagram •

Refresh

control

card

block diagram • •

Cursor

control

card

block diagram

(xiv)

. .

PAGE

1-1

1-2

1-3

2-1

2-2

2-3

2-4

2-5

2-6

2C-

3-9

4C;

4-18

4-19

4-20

4-21

4-22

4-24

4-26

4-31

4-33

4-35

4-40

4-43

4-45

4-47

4-C

:~~

4-59

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