TeleVideo 9320 Manuale utente

TELEVIDEO®

9320 VIDEO DISPLAY TERMINAL

MAINTENANCE MANUAL

Document 133002-00

August 1988

part

of this publication may

reproduced, transmitted, transcribed, storedin a retrievalsystem,

translatedinto any language or com-

puter

language, inany form

by any means, electronic, mechanical, magnetic, optical, chemical, manual,

otherwise, without the prior written permission ofTeleVideo Systems, Inc., 1170 MorseAvenue, P.O.

Box3568, Sunnyvale, California 94088-3568.

Disclaimer

TeleVideo Systems, Inc. makes no representations or warranties with respect to this manual. Further,

TeleVideo Systems, Inc. reserves the right to make changesin the specifications

the product described

within this manual at any time without notice and without obligation

TeleVideo Systems, Inc. to notify

any person

such revision

changes.

TeleVideo

a registered trademark

TeleVideo Systems, Inc.

TeleVideo Systems, Inc., 1170 Morse Avenue, P.O. Box3568, Sunnyvale, California 94088-3568

408/745-7760

Contents

1 Introduction

OVERVIEW

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

1-1

DESCRIPTION

THE

MODULES

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

1-2

Logic Circuitry

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

1-2

Video Circuitry

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

1-2

Power Supply Circuitry

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

1-2

Keyboard

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

1-3

RS-423 SIGNALASSIGNMENTS

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

1-3

SPECIFICATIONS

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

1-4

Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Electrical

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

1-5

Display

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

.1-6

Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7

Environmental

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

1-8

CRT

Controller Format

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

1-9

Board

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

1-10

2 Theory ofOperation

INTRODUCTION

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

2-1

DETAILED

DESCRIPTIONS

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

.2-2

System Clocking

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

.2-2

The GateArray

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

2-2

CPU

System

And

Control

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

. .2-2

Character Generation

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

.2-5

Video Display Generation

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

. .2-5

Screen

Data

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6

Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6

3 Maintenance

VISUAL INSPECTION

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

.3-1

Terminal and Keyboard Exterior

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

.3-1

Terminal and Keyboard Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.3-1

TESTS AND ADJUSTMENTS

....

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

.3-1

Height

and

Width

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

.3-1

Linearity

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

.3-2

Brightness

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

.3-2

Trapezoidal Distortion

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

.3-2

Concave and Convex Distortion

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

.3-2

Display Stability

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

.3-2

iii

Making Adjustments

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

.........

.3-2

TROUBLESHOOTING

...

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

..........

3-3

REMOVING

THE

MODULES

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

.3-5

Opening the Case

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

...........

.3-5

Removing the Circuit Board

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

.3-6

Replacing the Circuit Board

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

.3-6

Closing the Terminal Case

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

.3-8

Opening the Keyboard Case and Removing the Keyboard Circuit . . . . . . . . . . . . .3-8

Replacing the Keyboard Circuit and Closing the Keyboard Case

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

.3-8

4 Parts and Service

ORDERING

SPARE

PARTS

........

;

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

.4-1

SERVICEINFORMATION

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

.4-8

Return Procedure

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

. . . . . . . . . . . . . . . . . . . . . . . . . .4-8

Regional Sales Offices

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

.4-8

5 Schematics

A Service Bulletins

Illustrations

1-1

Front View

the 9320

1-2

Rear

View

the 9320 . . . . . .

1-3

Keyboard Layout . . . . . . .

2-1 Block Diagram

the 9320 .

2-2 Memory Map for the 9320 .

3-1 Discharging Voltages

....

3-2 Opening the Terminal Case .

3-3 Removing

the

Circuit Board

Tables

1-1

Main Port Assignments for DB-25

....

1-2 Main Port Assignments for DECconnect

1-3

Printer Port Assignments for DB-25

....

1-4 Printer PortAssignments for DECconnect

3-1 Troubleshooting Guide .

4-1

Main Parts List

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

4-2 Parts Reference List

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

5-1 Circuit Board

Reference (Logic Board)

· .1-1

· .1-2

.1-7

· .2-1

· .2-3

.3-5

.3-6

.3-7

.1-3

.....

1-3

......

3-3

.4-1

.4-2

5-1

1 Introduction

Thismanualisintendedonlyforqualifiedrepair

personnel. Youwill find specifications for the

9320 at

the

end

thisSectionand detailedcircuit

descriptions in Section

Using

the

proceduresinSection

theschematics

inSection

and

Operator's

Manual, you can

repair most failures quickly.

difficulty arises,

contact your dealer.

you fmd thatyou

need

parts or service, youwill

fmd the informationyou

need

in Section

Figure 1-1. FrontView

the 9320

9320 Maintenance Manual

1-1

OVERVIEW

TeleVideo's 9320 terminal is

ANSI terminal

that emulates the

DEC

VT320 terminal.

The

CPU

for the 9320 is

the

65C816 microprocessor.

The CRT controller is the 2672.

Figures 1-1

and

1-2 show front and

rear

views

the terminal.

Introduction

\\\\\\\\\\\\\

\\\\\\\\\\\\

\\\\\\\\\\\\\

\\\\\\\\\\\\

-__

-----=::-,!!,.

AUX

~a~~~'-:-i-n~=~/:~4~

AUX/

PRINTER

PORT

DEC

CONNECT

AUX/

PRINTER

PORT

POWER

CABLE R5-232/RS.423 HOST PORT

SOCKET

Figure 1-2. RearView

the 9320

DESCRIPTION

THE

MODULES

The logic, video,

and

power supply circuitry

are

all

one

board

-the circuit board, which is in-

side the plastic case under the CRT.

Logic

Circuitry

The65C816-based control circuitry

the circuit

board

generatesthevideo

and

syncsignalsneeded

to display

data

on the

CRT

screen.

also proces-

ses

and

stores

data

transmitted

received.

The main logic

the circuit board includes four

areas, which

are

described in detail in Chapter 2

("Theory

Operation"):

• Main processor (CPU)

•

Random

access memory (RAM)

• Display processing

• Input/output interface

Introduction 1-2

DEC

CONNECT

HOST

PORT

Video

Circuitry

The

video circuitry, which is also

the circuit

board, takes care

horizontal

and

verticalsweep

and

video amplification.

producesa non-inter-

lacedraster display

the screen.

The

video sig-

nals created by this circuitry generate a series

pixels to appear

pre-determined positions

each scan line.

display characters, the video

circuitryforms dotmatricesthat

are

pixelswide

and

either

14 pixels high (10 x

x 14

character cells).

Power

Supply

Circuitry

The

components

a switching power supply

are

distributed along

the

right side of the circuit

board. The power supply converts input voltage

of90-130 Vac (60 Hz)

180-260

Vac

(50 Hz) to

the following:

9320 Maintenance Manual

+5 Vdc for TTLlogic

the circuit board

+12Vdcfor thevideo signals andRS-423 com-

munications

-12

Vdc for RS-423 communications

A user-replaceable fuse near the power plug

protects the circuitry from excess current.

Keyboard

The

9320

has a detachable keyboard connectedto

theterminal

a coiled cable. Thiskeyboard con-

tainsanarrayofkeyswitchesmountedonaprinted

circuit

board

(PCB)

that

includes

an 8049

microcontroller and other components.

The

8049

scans the keyboard matrix, encodes the

data, and transmits the appropriate scan codes.

Data

transmittedthrough a4-wire cableover an

asynchronous serial port at

9600

baud to the main

logic board.

On the circuit board, the serial data

converted

to parallel and decoded by the main processor

using decoding firmware.

RS-423 SIGNAL

ASSIGNMENTS

Main Port Connectors

The

9320

has two RS-423 main port connectors:

one

25-pin

(labeled

HOST)

and

one

DECconnect (labeled

~).

Table 1-1. Main

Port

Assignments for

DB-25

Pin Signal Name Direction

1 Frame Ground nla

2 Transmit

Data

Output

3 Receive Data Input

4 Request to Send Output

5 Clear to Send Input

9320 Maintenance Manual 1-3

Data

Set Ready

Signal Ground

Data

Carrier Detect

Data

Terminal Ready

Input

n/a

Input

Output

Table

1-2.

Main

Port

Assignments

for

DECconnect

Pin Signal Name Direction

Data

Terminal Ready nla

2 Transmit

Data

Output

3 Transmit Signal Ground Input

4 Receive Signal Ground Output

5 Receive

Data

Input

Data

Set Ready Input

Printer Port Connectors

The

9320

has two RS-42J printerport connectors:

one

25-pin

(labeled

AUX)

and

one

DECconnect (labeled.!,).

Table 1-3. Printer

Port

(DCE) Pin Assignments

Pin Signal Name Direction

1 Frame Ground nla

2 Receive Data Input

3 Transmit

Data

Output

5 Clear to Send Output

Data

Set Ready Output

7 Signal Ground nla

Data

Carrier Detect Output

Data

TerminalReady Input

Table

1-4.

Printer

Port

Assignments

for

DECconnect

Pin Signal Name Direction

Data

Terminal Ready n/a

2 Transmit

Data

Output

3 Transmit Signal Ground Input

4 Receive Signal Ground Output

5 Receive

Data

Input

Data

Set Ready Input

Introduction

SPECIFICATIONS

Physical

VDT Dimensions:

Height

Width

Depth

VDT

NetWeight

Case Foot Print

Case Features:

Tilt

Swivel

Cooling

Connectors

CRT:

Diagonal Measure

Phosphor

Fluorescence

Bulb

Face-plate

Screen

Persistence

Introduction

13.6 inches (34.5 cm)

12.9 inches (32.8 cm)

13.9 inches (35.4 cm)

17.5lbs.

8.6 inches by 8.0 inches (max.)

-5

to +

degrees

2700 left to right

Convection system

One RS423 communication

port

(DB25 male and

RJll

DECconnect)

One RS423 printer port (DB25 female and

RJll

DECconnect)

One

RJll

keyboard

port

One

receptacle-type quick disconnect

13.7 inches (34.8 cm)

P134 (amber); P192 (paper white)

Amber;

paper

white

0 deflection,

60"

radius face

Filterglass

Aluminized

Medium short (300us decay time)

1-4 9320 Maintenance Manual

Electrical

ACSupply:

Input

Line Voltage

(Jumper Selectable)

Frequency

Source Current:

115VLine

230VLine

Phase

Wattage

Supply:

12V

-12V

Ripple

and

Spike Noise

9320 Maintenance Manual

95Vto

130V

180Vto260V

50/60

Hertz

3 Hz.

1.0

Amp

max.

0.5

Amp

max.

Single phase, 3-wire

max.

+/- .2SVat 1.5

Amp

.24V at 1.6

Amp

.24V at 150mA

SOm

V peak to

peak

+5V

100mV peak

peak

+12V; -12V

1-5 Introduction

Indice

Altri manuali TeleVideo Scrivania

TeleVideo

TeleVideo TS 806/20 Manuale utente

TeleVideo

TeleVideo TPC I SYSTEM Manuale utente

TeleVideo

TeleVideo 955 Manuale utente

TeleVideo

TeleVideo TS 802H Manuale utente

TeleVideo

TeleVideo 950 Manuale utente

TeleVideo

TeleVideo TS 806H Manuale utente

TeleVideo

TeleVideo TS-1605 Manuale utente

TeleVideo

TeleVideo 925 Manuale utente

TeleVideo

TeleVideo TVI-9128 Manuale utente

Manuali Scrivania popolari di altre marche

HP m9060n - Pavilion - Elite Scheda tecnica

Asus

Asus E210 Series Manuale utente

Dell

Dell Inspiron 600m Manuale utente

Dell

Dell Inspiron 3662 Manuale utente

TotalFlow

TotalFlow uFLO Manuale utente

HP Presario SV7000 - Desktop PC Manuale utente

HP ProDesk 400 G5 Manuale

Logitech

Logitech MK320 Manuale utente

Dell

Dell XPS 730 H2C Manuale utente

Sony

Sony Vaio Series Manuale utente

Sony

Sony VGC-LT32E - Vaio All-in-one Desktop Computer Manuale utente

Alto

Alto MD 250 Manuale utente

Lenovo

Lenovo ThinkCentre Edge 72 Manuale

Lenovo

Lenovo ThinkStation D20 Manuale

Arbor Technology

Arbor Technology FPC-7800 Series Manuale utente

Sony

Sony VAIO VGX-TP1 Series Manuale utente

Asus

Asus Eee Box B204 Manuale utente

Dell

Dell Optiplex 9010 All In One Manuale utente