Zenith Z-2300 Service Manual

Z-2300

Series

Service

N

Guide

N

oty

g:ggg;m

ensry | data

Z”

THE

QUALITY

GOES

IN

systems

BEFORE

THE

NAME

GOES

ON

The

purpose

are

entered

annotate

the

of

this

in

this

manual

page

is

manual.

and

list

to

make

sure

When a service

the

information

that

in

the

all

service

bulletin

record

bulletins

is

received,

below.

Record

SERVICE

BULLETIN|

NUMBER

of

|

|

DATE

OF

ISSUE

Service

CHANGED

|

PAGE(S)

Bulletins

PURPOSE

SERVICE

OF

BULLETIN

INITIALS

Contractor

entire

The

Trademarks

MS-DOS®

Copyright
Printed

in

Zenith

Data

St.

Joseph,

Zenith

is

document

and

Copyrights

is a registered

1988

Zenith

Data

the

United

States

Systems

Michigan

Corporation
49085

LIMITED

Systems

Data

subject

is

trademark

Systems
of

Limited

to

of

America

RIGHTS

Corporation

Corporation,

LEGEND

Rights

Microsoft

Corporation

of

data

all

St.

rights

Joseph,

Michigan

provisions.

reserved.

49085.

Contents

Chapter 1 —
Toolsand

Product

Specifications

Introduction

Equipment

Features

.

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

SystemOverview

MainBoard
Backplane
Keyboard

VideoCard

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

Board.......................

Interface

..........

PowerSupply

Keyboard...........

Chapter 2 —
Installation

Memory
Numeric

Installation

of

Options.
...
Coprocessor

CircutCards
Internal
External

ConNeCtioNS

KOYDOAIA.

VOO

PAralBl

Serial

Power

Disk

Drives

Disk

.

.

...

.

-

o5

s

5

555555

PO

.

Port

.

...

Connections

.

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

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

.

.

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

Board

.

...

...

...

...

..

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

...

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oo

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.

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5

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e

5

5

2-10

e

2-10
2-12
2-13
2-14

1-2
1-2
1-4
1-6

1-6
1-7
1-7
1-7
1-7
1-8

2-1
2-2
2-5
2-7
2-8
29

29

Chapter
PowerUp
Resettingthe
The

3—

Operation

...

Computer

Monitor
Entering
Machine

Setup/Configuration

Program

the

Monitor

Language

.

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

.

.

.............coouuieunn

Program

Debugger

Program

.

..

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

Commands

.

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

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

BootCommand...................................

ColorBarCommand

...................cuuiuunnn.

...

..

...

.

..

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

3-7

3-13

3-13

Page

iv

Contents

DIVES

DiSK
Keyboard

.

Chapter 4 —

=111

2

V=

(7o

CircuitCard
Backplane
Keyboard

Interface

Speaker/LED

Battery

Removal.

MainBoard

Floppy

Hard

Power

Disk

Disk

Supply

Drive

Chapter 5 —

MaINBOAMd

Backplane

Card

Video

DFiVE.

DiSK

Hard
Floppy

DisSk

Keyboard

ciimssesassimisesssssansnesanseis

e

.

.

.

.

......ooviinennenneniiiiii

Disassembly

P

|

(012

Removal

Board

Removal.

Removal

Drive

Removal

Removal

......coiit

.

.

Removal.

Board

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

Removal

...,

........coiiiniiiiiii

.

.........c.otiiiiinnennnens

.

Removal

...........

...

...

.

...,

i

.o

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

.

.

i

...

oo

Configuration

oo

.

.

.

Board

..o

.

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oot

ie

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et

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e

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e

3-14
3-15

4-11

oo

e

41
4-2

4-3
4-4
4-6

4-6
4-6
4-8
4-9

5-2

5-6

5-7
5-10
5-10
5-11

Chapter 6 —

MESSAQES

Error

Troubleshooting

v

.

.

Step1:InitialChecks

....coviiiiiiiiii

Step2:PowerUp

ROM-Based

3:

Step

Disk-Based

4:

Step

Comprehensive

5:

Step

Comprehensive

6:

Step

Power

7:

Step
Step8:MainBoard.

Floppy

9:

Step

Hard

10:

Step
Step11:Video
Step12:Keyboard

Disk-Based

Chapter

7—

.

Diagnostics

Supply

..........c.oiiiiiiiiiii

DiskDrives

Drives

Disk

.....coiiiiiii

.

.

Diagnostics

Parts

tiiiiiii

i

vvi

vt

.........ooiiiiinniiiiiiieenns

.

i

i

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

Test

Read

Disk

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

..

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

.

.

Tests

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

..ot

ROM-Based
Disk-Based

oovvi

...

.

.

..

.

..........

.

FastTests

...t

s

...t

.....cooiiiiiiiii

.

..

i

List

6-2
6-3
6-3
6-4
6-5
6-7

6-8

6-8
6-11
6-13
6-16
6-18
6-20
6-21

Figures

1-1.

Basic

Z-2300

1-2.

FrontView

1-8.

REATVIBW.

2-1.

SIMMMemoryModule............................

2-2.

Memory

2-3.

Installing

2-4.

80287

2-5.

ICPinAlignment................coiiunniiii...

2-6.

Circuit

2-7.

RearPanelHook-UpChart........................

3-1.

Monitor

3-2.

Setup/ConfigurationMenu

3-3.

Disk

3-4.

EnhancedKeyboard.............................

Numeric

Card

Drive

Series

.......

o

v

v

v

Module

and

Command

Socket

RemovingSIMMs..

Coprocessor

Installation

Locations.

Computer
..

...

v

oamiimmnn

Locations.

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

Summary

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

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

...

...
st

.

..

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

Socket

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

.

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

Contents

.

.

...,

s

imamnmnmsnh

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

Location.

.........

s

s

Page

2-2
2-2
2-4
2-6
2-6
2-8

2-15

34

3-8
3-14
3-15

v

1-1
1-3
1-3

41.
4-2.
4-3.
4-4.
4-5.
4-6.
4-7.
4-8.
4-9.

5-1.
5-2.

5-3.
5-4.
5-56.

6-1.

CoverRemoval................couiiiunnnnnnnnn..

CircuitCardRemoval.............................

BackplaneBoardRemoval.........................

Keyboard
MainBoardRemoval
Slidingthe
Floppy
Hard
PowerSupplyRemoval

MajorAssemblies.
Main
Backplane

Video

3.5-Inch

Disk

Interface

MainBoardOut

Disk

Disk

Drive

Board

Board

Card

Disk

Drive

Power

Board

Drive

Removal

Removal.........................

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

Jumper

Jumper

Switch

Drive

Cable

and

Select

Removal

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

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

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

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

Locations

Locations.

Jumper

Switch.

Voltages.

...

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

...

.

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

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

Locations

.

.

.

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

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

...

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

4-2
4-3
4-4
4-5
4-7
4-8
4-9

4-10
4-11

5-1

5-2
5-6
5-8

5-11

6-10

Page

Vi

Contents

Tables

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

3-1.
3-2.

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

6-1.

7-1.

Keyboard
9-Pin

15-Pin
Parallel
Serial

Machine
Main

Main

J505

Backplane
Video

EmorMesSages

Z-2300

Connector

Video

Video

Port

Pin

Port

Language

RAM/Add-On

Board
Numeric

Board

Card

Series

Assignments.

Pin

Assignments

Connector

Connector

Pin

Assignments.

Jumper

Coprocessor

Configuration..........................

Parts

Pin

Assignments

Pin

Assignments

Debugger

RAM

Settings

Jumper

.........ouviiiiniennuennneennennn

List.

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

..

Commands.

Combinations.

Field

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

Settings

Settings.

..........

..

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

...........

.

.

...........

.

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

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

........

.

...

...

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

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

...

...

i

2-10

2-11
2-12
2-13
2-14

3-5

3-10

5-3

..

5-5
5-6
5-9

6-2

7-1

The

Z-2300
compatible
ries

computer

Series

80286-based

is

shown

computer

personal

in

Figure

is

a

high-performance,

computer.

1-1.

Chapter

Introduction

XT-

and

AT-

The

basic

Z-2300

Se-

1

This

computer

A

socket

minimum
SIMMs).
cules
video
able.
disk

circuitry.

is

of

Available

video

signals. A Zenith

The

disk

drive

installed

Figure

uses

provided

1M

of

in

their

controller

1-1.

an

for

RAM

video

native

in

the

Basic

Z-2300

80286

microprocessor

an

optional

is

included

cards

support

(TTL)

480-line

supports

Z-2300

Series

80287

modes

(VGA-type)

two floppy

Series

numeric

(expandable

CGA,

and

contains

Computer

operating

coprocessor.

to

EGA,

MDA,

as

31.49

display

disk

drives.

its

own

at 8 MHz.

6M

using

and

kHz

is

also

The
controller

A

1M

Her-

analog

avail-

hard

Page

1-2

Introduction

This

Service
specifications,
semblies.

are

included.
along
selectable
sembly
tion

are

plied

to

sembly

-

585-299

«

595-4074

Guide

and

Procedures

The

with

specific

self-tests

procedures,

also

included.

assist

in

level.

Related

identifies

provides a brief

for

adding

general

diagnosing

Z-2300

Professional

operation

Monitor

and

debugger

connector

Finally, a troubleshooting

publications

Series

the

Z-2300

internal

program

pinouts,

faults

to

include:

Service

Desktop

Series

description

options

of

the

computer

commands

commands.

and

configuration

the

circuit

Manual

Computer

computer,

of

its

major

and

peripherals

is

including

Complete

procedure
card

or

Owner's

Manual

lists

its

as-

described

user-

disas-

informa-

is

sup-

major

as-

Tools

The
described

«
Phillips
e
e
»

and

tools

and

Flat-blade

Nutdrivers

ADVMor

Disk-based

Product

Figures
of a basic
connecting

1-2

Equipment

equipment

in

this

Service

screwdrivers

screwdrivers

VOM

diagnostics

Features

and

1-3

illustrate

Z-2300

and

Series

operating

recommended

Guide

include:

(CB-31-2).

the

controls,

computer.

the

computer

to

service

features,

More

is

included

this

and

detailed

in

computer

connectors

information

later

chapters.

as

on

Page

1-3

Introduction

OeKe

Q

|

WA

\

KEYBOARD

CONNECTOR

Figure

COVER

LOCK

) )

POWER

LED

7

/

4

1-2.

SECURITY
BRACKET

ON

ACCESS

S

3.5-INCH

Front

HARD

(oo

MCROFLOPPY

DISK

DRIVE

\

J

\

DISK

DRIVE

MICROFLOPPY

DISK

DRIVE

View

9-PIN

VIDEO

CONNECTOR

/

/

—

JodC: : -

Jo

BTUEET

15-PIN

VIDEO

CONNECTOR

)

POWER

CONNECTOR

CONNECTORS

Figure

SERIAL

1-3.

Rear

PARALLEL

CONNECTOR

View

|

VIDEO

CONFIGURATION

SWITCH

Page

1-4

Introduction

Specifications

CPU:

Clock:

Memory:

Backplane:

1/0:

80286,

8

1M

using

MHz.

minimum,

1M

16

bit.

SIMMs;

memory.

Three

for

PC/AT

expansion).

slots

Centronics-type
25

connector).

Two

ports

bit;

7-

two

stop

of

110,

4800,

DSR,
RTS,

ated;

RS-232C

(DB-9

or

150,

or
CD
DTR

half-

asynchronous

connectors):

8-bit

word

bits;

selectable

300, 600,
9600
signals

control

or

full-duplex

expandable

640K

(two

parallel

port

one

length;

baud

1200,

baud;

RD,

recognized;

signals

operation.

to

6M

system

available

(DB-

serial

start

one

or

rates

2400,

CTS,

TD,

gener-

Video

31.49

kHz:

Analog
constant

RGB

31.49

video

kHz

through a 15-pin

Generates
cules,
type)

31.49

sync

EGA,

and
displays
kHz

type

monitors.

Zenith

analog

signals

scan

D-type

CGA,

480-line

when

RGB

at

a

available

connector.

MDA,

Her-

(VGA-

used

or

with

multi-

Page

1-5

Introduction

Native:

Disk

drives:

Keyboard:

Power

supply

Input:

Output:

Standard

compatible

nals
type
CGA,
when

One

and
for

two

101-key

17-key
sor
3-key

RGBrgb,

monochrome

available

connector.

MDA,

used

with

3.5-inch
one

hard

floppy

enhanced

numeric

control

pad,

function

programmable

100-130

VAC

+5
VDC

at

VDC

at

VAC

50

Hz,

at

8A,

0.2A.

RGBI,

video

through a 9-pin

Generates

and

Hercules

the

same

microfloppy

disk

disk

drives.

displays

monitors.

disk

drive.

keyboard

keypad,

6-key

function

at

60

pad,

Hz

4-key

editing

and

keys.

or

200-230

auto-switching.

+12

VDC

at

or

TTL-

sig-

D-

EGA,

drive

Support

with

cur-

pad,

12

3A,

-12

Audio:

Battery:

Size

Computer:

Keyboard:

Zenith

to

change

changes

Data

Systems

specifications

into

products

reserves

at

the

any

previously

8-ohm,

3.6V

14 x 15 x 4

10.2

18.5 x 8 x 1.5

2-inch

lithium

cm)

speaker.

powers

inches

inches

cm)

right

to

discontinue

time

without

sold.

real-time

(35.6 x 38.1

(47 x 20 x 9

products

incorporating

clock.

x

and

these

Page

1-6

Introduction

System

This

section

Series

(containing
backplane
troller
drives,

Main

The

main

all

/O

is

compatible

Overview

briefly

computer.

the

board

circuitry), a video

and a keyboard.

Board

board

circuitry.

The

with

puters. A number

large

scale

integration)

a

smaller,

Support
ing
6M
devices,

is

speed

of

memory,

simpler

available

can

be

in

is

also

supported

describes

The

computer

CPU,

memory,

(containing

card, a power

contains

the

Z-2500

the

Z-200

of

functions

multifunction

design

set

the

for

an

for

different

form

using

the

I/O

expansion

CPU

Series

Series

are

fewer

80287

of

SIMM

on

this

major

components

consists

ports,

slots

supply,

and

its

support

is

based

and

other

combined

controller

ICs.

numeric

versions

(single

board.

of

of a main

and

real-time

and

floppy

floppy

on

circuits

the

80286

and

AT-compatible

into

two

devices,

coprocessor.
of

the

coprocessor.

in-line

memory

the

Z-2300

board

clock),

disk

con-

hard

disk

as

well

CPU

and

com-

VLSI

(very

resulting

The

operat-

Up

module)

a

as

in

to

Two

RS-232C
nectors
port

is

available

main

board.

A

3.6-volt

the

voltage

computer.

serial

mounted

lithium

needed

ports

are

available

on

the

main

board.

through a 25-pin

battery

to

powers

retain

the

One

D-type

the

real-time

through

connector

9-pin

D-type

Centronics-type

mounted

clock

and

configuration information

con-

parallel

on

the

supplies

for

the

Page

1-7

Introduction

Backplane

A

vertically-oriented

on

the

main

sion

slots,
connector.
drives.

drive.

The

Keyboard

The

keyboard

left

front

connector

Video

The

Z-449

constant

Hercules,

duced

signals
video

using a 31.49

card.

Board

board.

the

floppy

The

hard

Interface

connector

corner

filtering

Card

video

31.49
and

Zenith

are

available

floppy

disk

of

card

kHz

backplane

This

board

disk

controller

board

contains

controller

disk

controller

circuitry

Board

is

mounted

the

chassis.

and

fuse.

can

produce

horizontal

480-line

kHz

analog

through a 15-pin

plugs

three

circuitry,

supports

is

contained

on a small

This

board contains

an

analog

scan

frequency.

(VGA-type)

RGB

video

into a 62-pin

AT-compatible

and

the

hard

two

in

circuit

RGB

video

CGA,

displays

monitor.

D-type

can

connector

connector

disk

floppy

the

hard

board

the

keyboard

signal

EGA,

all

These

expan-

cable

disk
disk

in

the

at

MDA,

be

pro-

analog

on

the

a

The

video

video

signals

are

available

Power

The

switch-mode

the

currents

«

+5VDC

e

+12VDC

«

—-12VDC

card

can

in

their

through a 9-pin

Supply

power

indicated:

at

8A

at

3A

at

0.2A

also

produce

standard

supply

CGA,

(TTL)

D-type

provides

EGA,

form.

These

connector

the

MDA,

and

standard

on

the

video

following

Hercules

signals

card.

voltages

at

Page

1-8

Introduction

These
share

outputs

cabinet

the

Keyboard

The

computer

can

be

set

for

are

electrically

the

as

is

supplied

PC-

or

AT-compatible

common

with

isolated

ground.

an

enhanced

operation.

from

the

main

101-key

voltage

keyboard

and

that

This

chapter

including

power

connection.

Begin

by

packaged

in

case

the

The

options

customer.

«

Amount

e

Numeric

»

Type

and

«

Type

of

»

Type

and

explains

installation

unpacking

separately.

computer

and peripherals

Some

of

installed

coprocessor

location

video

number

the

of

the

Have

must

items

of

monitor.

of

installation

internal

computer

the

customer

be

transported.

to

be

to

check

for

memory.

installation.

optional

disk

circuit

drives.

of a Z-2300

options,

and

peripherals.

installed

during

cards.

Chapter

Installation

Series

peripheral

save

the

vary

from

installation

computer,

interface,

The

keyboard

shipping

customer

include:

2

and

is

cartons

to

Installation

The

Z-2300
ditional
tional

specific

these

memory

circuit

customer

options.

of

Series

(up

cards,

Options

computer

to

additional

applications).

6M),

supports

an

80287

disk

Use

several

numeric

drives,

the

following

options,

coprocessor,

and

custom

sections

including

addi-

ROMs

to

install

ad-

(for

Page

2-2

Installation

Memory

As

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Page

2-3

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following

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to

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by

touching

then

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or

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go

or

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memory

B1, B2,

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precautions

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between

the

up

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in

Chapter

module

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housing)

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remove a SIMM,

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tip

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module

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the

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gently

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push

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lift

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snap

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disk

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to

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holes

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on

right

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away

time,

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drive

housing).

for

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from

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main

until

at

ends

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push

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tip

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in-

the

it

the

of

the
the

is

Page

2-4

Installation

TO

REMOVE

4.

Figure

NOTE:

Because
inserted,
new

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the

highest

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kit
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in

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from

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you

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remove

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computer.

bank

first.

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the

fourth

the

memory

of

two

to

position

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as

shown

the

memory

from

sockets

sockets

so

that

A1

through

the

devices

2-3.

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pins 2 and 3 to

and

must

all

installed

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example,

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first

to

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install a ZCA-2300-MG

1-megabyte

the

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to

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remove

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flat

side

faces

faces

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move

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tipped

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if

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location

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devices

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through

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disk

drive

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angle

before

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by

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faces

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factory-installed

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to

side

housing,

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on

to

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inserting

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disk

six

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properly.

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the

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verify

cover.

computer

memory

that

program

recognize

to

all

memory

described

test

described

added

the

banks

Page

Installation

in

Chapter

memory.

in

Chapter

are

functioning

2-5

3.

3.

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empty

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coprocessor

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Chapter

4.

Page

2-6

Installation

2.

Refer

to

socket

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Figure

2-4

and

locate

U538).

the

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3.

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its

Page

2-7

Installation

4.

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pin 1 of

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installing.

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to

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documentation

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and

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Page

2-8

Installation

Internal

Up

to

two

puter.

if

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in

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disk

only

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drives

one

disk

floppy

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power

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the

disk

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to

designated

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drive

cable

to

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computer

to

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to

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cable

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with

pin 1 of

run

recognize

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the

disassembly

set

the

drive

position; a second

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installing

the

drive.

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the

disk

drive

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Setup/Configuration

the

added

drive.

Page

2-9

informa-

select

the

drive,

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to

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ZA-180-54

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one

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video,

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disk

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disk

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instructions

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information

Pinouts

and

serial

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currently

drive

expansion

the

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are

for

port

connectors.

installed

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card.

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included

connecting

are

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in

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added

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with

by

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the

peripherals

for

computer,

installing

to

the

drive

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to

the

keyboard,

an

a

ex-

the

Page

2-10

Installation

Keyboard

The

101-key

DIN

connector
cessed
signments

Table

PIN

1

2

3

4
5

through a hole

of

2-1.

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Keyboard

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keyboard

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clock
data

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to

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panel.

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Assignments

keyboard)

keyboard)

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through a 5-pin

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pin

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video

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connector.

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5

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sync

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of

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sync

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5-4

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2-11

Installation

video

available

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the

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configuration.

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produce

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available

5

for

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connector.

an

analog

scan

frequency.

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video

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specific

examples

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monitor.

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pin

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all

be

produced

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analog

connector.

these

monitors

assignments

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RGB

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and

for

the

to

Page

2-12

Installation

2-3.

Table

15-Pin

Video

Connector

Assignments

Pin

PIN

=

WN

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10
11
12
13
14
15

31.49

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V

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assignments

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hook-up
parallel

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port

kHz

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video

video

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ground

ground

ground

sync

sync

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through

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connector.

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parallel

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of

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the

panel

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2-4

rear

location

of

the

panel

the

of

Table

2-4.

Parallel

Port

Pin

Assignments

Page

2-13

Installation

PIN

1
2
3
4
5

6

7

8

9

10

11,

12

13

14

15

16

17

18-25

Serial

SIGNAL

Strobe
Data

bit

0

Data

bit

1

Data

bit

2

Data

bit

3

Data

bit

4

Data

bit

5

Data

bit

6

Data

bit

7

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serial

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at

the

end

are

available

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on

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connectors.

port

connectors.

require a special

this

computer.

and

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this

chapter

on

the

rear

Table

2-5

Some

serial

cable

to

Table

2-5

includes a cross

connectors.

shows

the

panel

connect

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locations

of

lists

the

devices

to

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the

pin

with

the

panel

of

the

Page

2-14

Installation

Table

2-5.

Serial

Port

Pin

Assignments

PIN

1
2
3
4

5

6

7

8
9
Case

SIGNAL

Carrier
Receive

Transmit

Data

Signal

Data

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the

Not a bootable

These
that
tem

messages

the

operating

documentation

partition

are

normal

system

for

information

is

not

and

indicate

present.

on

that

Refer

loading

the

to

the

the

operating

CPU

recognizes

operating

sys-

system.

Page

3-2

Operation

Resetting

Occasionally,
power-up
either

Hard

turn

Soft

them,

The

The
vital

»

Power-up

computer

=

The

ating

sequence

of

two

ways:

reset — Turn

it

back

on.

reset — Press

and

then

Monitor

ROM-based

to

the

computer’s

from

boot

command,

system

the

you

will

release

Program

Monitor

tests

that

operating.

from a disk

Computer

want

to

to

be

repeated.

the

computer

the

CTRL,

ALT,

them.

program

operation.

can

detect

which

allows

to

memory.

reset

the

The

off,

wait

and

DEL

permanently

This

program

problems

the

computer

computer

computer

30

seconds,

keys

in

stores

contains:

that

would

to

force

can

be

and

sequence,

information

prevent

to

load

the

the

reset

then

hold

the

oper-

in

j—

=

User-selectable

«

Commands
entered,

In

addition,

Setup/Configuration

Entering

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MFM-200

change
You

can

changed,

the

the

the

enter

tests

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Monitor

Monitor

Monitor

configuration,

the

Monitor

for

the

allow
examined,

program

menu

discussed

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program

and

program

disk

machine

and

allows

can

perform

in

drives,

be

keyboard,

language

run.

access

in a later

used

ROM-based

several

programs

to

section.

to

diagnose

ways:

and

memory.

to

the

hardware

problems,

diagnostics.

be

Page

3-3

Operation

CTRL-ALT-INS

hold

them,

and

be

displayed:

MFM-200
Memory
Enter

->

The
prompt.
should

"?"

arrow

It

be

Monitor,

size:

for

(->)

indicates

able

to

running.

CTRL-ALT-RETURN

computer

the

force

not

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and

ALT,

CTRL,

them.

lease
screen

appears,

message

Hard

reset — There

and

neither

lows

you

hard

reset

then

turning

allow

you

The

followed

the

try

described

the

to

enter

by

turning

it

back

to

use

—

Press

the

then

release

Version

xxxK

help

on

the

last

that

you

enter

the

—

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to

keys

register

CPU

Monitor

the

by

CTRL-ALT-INS

may

should

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earlier

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the

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the

computer

on.

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the

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CTRL,

ALT,

and

them. A message

x.x

line

of

the

have

entered

Monitor

the

enter

program

CTRL-ALT-INS

Monitor

the

sequence,

in

contents

prompt.

combination

key

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appear.

instances
nor

program.

when

CTRL-ALT-RETURN

If

off,

procedure

key

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combination.

INS

similar

message

the

Monitor

even

key

program,

them,

hold

be

will

the

again.

the

this

happens,

waiting

clear

keys

in

sequence,

to

this

is

the

Monitor

program.

when

software

combination

press

then

and

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is

locked

on
prompt

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displayed

Monitor

CPU

combination

perform

30

seconds,

the

CPU

should

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is

does

the

re-

the

up

al-

a

and
and

Figure

3-1

shows

type a question

Monitor

*

|tems

[like

are

optional

commands

shown

this]

the

mark

use

in

brackets

entries

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(?)

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following

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are

command

press

only

entered

summary

RETURN

at

the

conventions:

in

certain

you

will

see

if

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cases.

you

Page

3-4

Operation

«

ltems

shown

{like

this | and

in

braces

this}

and

separated

by a vertical

bar

represent a series

you

can

choose

»

Items

shown

<like

this>

must

be

replaced

CMD

22

B:

cs

D:
E:
F:

G:

H:

I:

M:
0O:

R:

S:

T2

Uz

V:

TEST:
SETUP:

Explanation

Help

Boot

from

Color

bar

Display

Examine

Fill

memory

Execute

Hex

math

Input

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memory
Output
Examine

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Trace

program

Unassemble

Set

Video/Scroll

Where
Extended
Define

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of

either

in

angle

with a variable,

-

MFM-200

disk

memory
memory

(Go)

from port

block

to

port

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memory

program

<range>

hardware

is:

diagnostics

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choices.

like

this

braces

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[{FIW}]1[{0]1]12]13}][:<partition>]

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D

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<range>,

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H

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<range>,

0

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this

example,

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Figure

3-1.

Monitor

Command

Summary

Page

3-5

Operation

Machine

The

Monitor
debugger
chine

memory

chine

Do

not

unless
architecture.

Table

COMMAND

Display
memory

Language

program

commands.

level

programmers

and

language

attempt

you

are

Table

3-1.

Machine

contains a complete

register

contents,

programs.

to

use

familiar

3-1

Language

SYNTAX

D<address>

D<address>

Debugger

These

to

test

the

machine

with

such

lists

and

L<bytes>

Commands

commands

procedures

and

troubleshoot

language

programming

describes

Debugger

set

of

machine

allow

experienced

and

routines,

and

debugger

and

each

command.

Commands

DESCRIPTION

Displays
bytes
at

Displays
specified
of
specified

contents

of

memory

specified

contents

number

memory

beginning

address.

language

ma-

examine

correct

commands

ma-

microprocessor

of

128

beginning

address.

of

of

bytes

at

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memory

Fill

memory

D<range>

E<address>

F<range>,<data

F<range>,"ASCII

byte>

string”

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specified

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alter

contents

memory

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into
specified

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into

location.

specified

each

specified

specified

contents

block

of

and

allows

of

specified

data

memory

memory

ASCII

memory

of

memory.

user

to

byte

location

block.

string

block.

in

Page

3-6

Operation

Table

COMMAND

Execute

Hex

math

Input

from

port.

Move
block

Output

port

3-1

(continued).

(Go)

memory

to

Machine

Commands

SYNTAX

G=<address>

G=<address>,<breakpoint>

H<numberi>,<number2>

l<port

address>

Mc<range>,<destination>

O<port

address>,<data>

Language

Debugger

DESCRIPTION

Begins

at

at

execution

specified

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halts

Displays
difference
hexadecimal

Displays
specified

execution

specified

at

breakpoint.

contents

Copies
memory
specified

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specified

contents

specified

the

port.

block

memory

port

of

address.

of

address

sum

of

the

numbers.

of
to

data

address.

program

program

and

and

the

specified

of

specified

another

block.

to

Examine
Registers

Search

memory

R<register

S<address>L

S<range>L<bytes>,"ASCII"

name>

<bytes>,<data>

Displays

specified

allows

contents.

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block
and

found.

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block
character
address

contents

modification

for

specified

displays

for

character

of

CPU

register

specified

address

specified

specified

and

displays

and

of

memory

data

data

memory

ASCII

found.

byte

Page

3-7

Operation

(continued).

3-1

Table

COMMAND

Trace
program

Unassemble
program

SYNTAX

T<count>

U<range>

Setup/Configuration

The

Setup/Configuration
installed
number
down
entered,
needs
actual
Configuration

memory,

and

type

the

computer’s

this

to

be

changed

hardware

the

boot

of

disk

speed

information

if

configuration

program:

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Commands

Program

program

drive,

drives

for

is

stored

the

main

is

Language

sets

the

the

type

Debugger

DESCRIPTION

lines

coding

of

video

specified

an

of

in

mnemonics

block.

date,

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of
program
mode.

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hex
memory

time,

installed. A special

time-dependent

in

non-volatile

board

battery

changed.

applications.

memory

is

replaced

To

access

number

assembled

single-step

and

for

specified

the

amount

card,

and

entry

can

and

or

the

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of

the

slow

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only

if

the

1.

Enter

keys

the

Monitor

in

sequence,

program

holding

by

pressing

them,

and

the

then

CTRL,

ALT,

releasing

and

them.

INS

Page

3-8

Operation

2.

After

the

RETURN.

Monitor

You

will

prompt

see

a

display

appears,

similar

type
to

the

SETUP

one

and

in

Figure

press

3-2.

I

-1Use

3.

Time:

Date:

Main

Add-On

Total:

Floppy
Floppy

Boot

Drive:

Serial

Serial

Video

Display:

Video

Refresh

Space/Backspace

Use
space

The

Hardware

09:53:08

04/14/1988

0:
1:

Floppy

Rate:

Base

640K

640K

Enhanced

RAM:

RAM:

Drive
Drive

Port 1 (COM1):
Port 2 (COM2):

Figure

the

RETURN

bar

and

selection

Setup/Configuration

Extended

0K

0K 0K

0K

3-1/2%"

~None

Present-

Then

Hard Disk

Enable

Graphics

50

Hz

to

select

3-2.

key

to

BACKSPACE

is

activated

Program

EMS

256K

e
—_—

1.4M

Enable

60

Hz

values,

Operating

Hard

Precomp:

Hard

Cylinders:
Ship
Precomp:

Disk

Cylinders:
Ship

Zone:

Disk

Zone:

Arrows

Speed:

Drive

Media

Drive

Media

to

Setup/Configuration

move

from

one

field

keys

to

make a selection

when

you

move

0:

Type:

1:

Type:

move,

Menu

to

another.

to

another

Slow

Fast

Heads:
Sectors:
Capacity:

-Not

N/A

Heads:
Sectors:
Capacity:

Esc

Smart

Present-

when

done

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in

the

field.

the

field.

4.

Use
tered
computer.
changes,

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—

clock.

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hours

(00-24),

complete

BACKSPACE

the

Esc

the

information

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and

The

time

set

the

minutes

the

entry,

key

to

key

then

field

time,

press

erase

to

exit

from

corresponding

to

press

RETURN

allows

enter

the

(00-59),

RETURN.

the

incorrect

the

program

indicate

to

save

you

to

set

correct

and

If

time,

seconds

you

entry.

after

you

to

the

hardware

that

you

are

done

the

changes.

or

adjust

in

24

the

hour

(00-59).

make a mistake,

have

en-

of

the

making

real-time

format,

After

you

use

the

as

N

Page

3-9

Operation

Date — The
of

the

real-time
month
the
key

Main
available
ory

(01-12),

entry,

press

to

erase

RAM/Add-On

memory

refers

to

directly.

EMS

memory

software
driver
dress
tion

Extended

memory
this

plications.

control.

to

address

space

for

more

range

memory

memory

Refer

tion.

Main

RAM

board

of

the
optional
the

Note
other
quired.

even

memory

main

board.

that

for

combinations,

Finally,

though

date

field

allows

clock.

To

day

(01-31),

RETURN.

the

incorrect

RAM

as

base,

the

memory

can

be

used

Some

applications

this

memory.

0D0000

to

information.

refers

that

MS-DOS

can

be

used

to

the

refers

to

the

computer.

cards

that

Table

some

combinations, a custom

additional

some

they

combinations

appear

you

set

the
and

If

you

entry.

—

This

extended,

(up

to

to

address

ODFFFF.

to

memory

can

for

setting

MS-DOS

available

Add-On

are

3-2

lists

as

options.

to

set

or

adjust

date,

enter

the

year

entries.

make a mistake,

field

allows

or

EMS

memory.

640K)

that

MS-DOS®

memory

programs

EMS

Refer

access.

memory

beyond

up

to

the

Under

RAM

use

is

MS-DOS

1M

disks

documentation

memory

RAM

refers

plugged

the

possible

into

to
the

installed

entries

PAL

memory

modules

are

not

currently

the

date

function

correct

After

use

you

date

you

the

BACKSPACE

to

allocate

complete

Base

recognizes

beyond 640K

an

EMS

software

located

in

documenta-

that

is

outside

software

and

other

for

more

informa-

on

the

memory

present

expansion

for

this

is

required.

(SIMMs)

supported,

using

the

mem-

under

the ad-

the

control,

ap-

main

on

slots

on

field.

For

are

re-

N’

The

BASE

640K

factory

EXTENDED

OK

setting

is:

EMS

256K

Page

3-10

Operation

Table

3-2.

Main

RAM/Add-On

RAM

Field

Combinations

BASE

256K
256K
512K
512K
640K

640K
640K
640K
640K
640K

640K

640K
640K

640K
640K

640K

Floppy
floppy
two

floppy

disk

drive

EXTENDED

oK
oK

oK
OK
oK
O0K
OK
2048K
3072K
5120K
5120K
7168K
7168K 2048K
9216K

13321K

15323K

Drive

0,

Floppy

disk

drive(s)

disk

in

this

that

drives.

field:

The

EMS

384K

-OFF­384K

-OFF­256K

-OFF­2048K

-OFF­2048K

-OFF­2048K

-OFF-

-OFF­2048K

-OFF-

Drive 1 —
are

installed.

following

COMMENTS

Requires

Requires
Standard
Standard
Standard
Standard

Requires

Requires
Requires 3 additional
Requires 3 additional
Not
Not
Not
Not
Not
Not

custom
custom

additional
additional

currently

currently
currently
currently
currently
currently

This

field

This

choices

PAL
PAL

memory
memory

memory

memory
available
available
available
available

available
available

specifies

computer

can

be

the

can

made

module
module

modules
modules

type

support

for

each

of

*

5-1/4"

e

5-1/4"1.2M

«

3-1/2"

e

3-1/2"1.4M

¢

Not

The

factory

Floppy
Floppy

360K

720K

Present

settings

Drive
Drive

0:
1:

are:

3-1/2"
Not

1.4M

Present

Boot

Drive — This

the

computer
computer
system.

*

Floppy

»

Hard

*

Floppy

*

Enter

The

factory

Hard

Disk

will

to

enter

The

following

Drive

Disk

Drive

then

MFM-200

setting

Drive

boot

the

0

Hard

is:

0.

field

allows

upon

Monitor

choices

0

Disk

Monitor

you

to

power-up.

mode

can

be

select

The

final

without

made

in

the

drive

choice

loading

this

field:

Page

3-11

Operation

from

which

instructs

an

the

operating

Serial

to

two

Port

serial

(designated

following

e
«

The

Serial
Serial

Video
stalled
mation
following

e

e
«
«

choices

Enable
Disable

factory

Port 1 (COM1l):
Port 2 (COM2):

Display — This

in

the

about

choices

Color

Card:

Color Card:
Mono

Card:

Enhanced

1,

Serial

ports.

The

COM1

can

settings

computer.

the

standard

are

40x25

80x25

80x25

Graphics

Port 2 —

computer

and

COM2)

be

made

are:

Enable
Enable

field

Refer

video

available

This

field

is

equipped

as

shipped

for

either

port

specifies

to

Chapter 5 for

card

in

this

the

installed

field:

allows

with

from

in

this

type

more

in

you

to

two

the

field:

of

video

detailed

this

computer.

activate

serial

ports

factory.

card

infor-

up

The

in-

The

Page

3-12

Operation

The

factory

setting

is:

Enhanced

Graphics

Video Refresh

rate

and

generally

lowing

e
e

The

60

Operating
trol

e
Fast
e

Choose
speed
slow
slower

mode
may

choices

50Hz
60Hz

factory

Hz

setting

Speed — The

over

the

computer’s

Slow

Smart

the

Fast

of

this

down

the

input/output

to

slow

down

require a slower

Rate — This

reflects

are

available:

is:

speed.

mode

to

80286-based

input/output

speed

the

entire

overall

field

the

power

Operating

The

take

full

advantage

computer.

speed.

to

operate

computer

computer

selects

the

line

frequency

Speed

following

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(Some

programs

properly.)

operation.

speed

video

entry

allows

choices

of

the
the

Choose

to

operate

display

in

use.

are

faster

Smart

may

(Some

properly.)

refresh

The

fol-

some

con-

available:

operating

mode

to

require

the

a

Slow

programs

The

factory

Fast

Hard

type

of
ternal
ting

is:

Drive

setting

Disk Drive

hard

disk

hard

disk

drive.

Type

44

is:

0,

Hard

drive

Disk

Drive 1 —

installed.

For

the

40M

The

hard

This

computer

disk

field

can

drive,

specifies
support
the

factory

one

the

in-

set-

Page

3-13

Operation

Boot

The

manually

Booting

A,

in
to
second
of

Command

boot

enter

drive

load

BFO.

an

floppy

Booting
enter

the

also

boot

into

multiple

and

partition

Color

Bar

command

a

from

from

floppy

the

Monitor

A,

type

operating

disk

from

hard

Monitor

from

a

partitions.

number:

BW<drive

Command

allows

hard

or

floppy

disk

program,

BFO,

and

system

drive

installed

disk

drives

program,

particular

Use

numbers:<partition

you
disk

drives

press

insert

RETURN.

from

—

the
in

—

type

BW,

partition

this

of

command

to

load

drive.

To

boot

a

disk

The

disk

the

computer,

To

boot

and

a

hard

an

from

with

computer

in

drive

from

press

disk

with

the

numbers

operating

floppy

an

operating

A.

To

type

BF1

a

hard

RETURN.

drive

if

appropriate

disk

will
boot

in

disk

You

it

is

system

drive

system

attempt

from

a

place

drive,

can

divided

drive

The

color

the

form
appear
and

contrast

Monitor

User

Tests

A

number

these

tests,

RETURN.

bar

command

of

a

bar

as

a

gray

of

program,

of

tests

enter

The

following

graph.

scale.

the

video

type

are

allows

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Use

C,

and

available

the

Monitor

menu

you

monochrome

this

command

monitor.

press

at
program,

will

appear:

to

display

monitors,

to

To

view

the

RETURN.

the

Monitor prompt.

type

an

array

adjust

color

TEST,

of

the

color

the

brightness

bars,

enter

To
and

colors

bars

the

access

press

in

Page

3-14

Operation

CHOOSE

-

WN

.

Ul

ENTER

To

run a test,

ESC

key

to

the

test

Disk

The
drives

Drives

Z-2300

or
external
2300-EF

drives

disk
density.

tions

for

ONE

DISK
KEYBOARD
BASE
EXTENDED
POWER-UP
EXIT

YOUR

READ

MEMORY

s
e
8
s
s

type

once

to

menu.

Series

one

internal

5.25-inch
external

can

Figure

this

computer.

OF

THE

FOLLOWING:

TEST

TEST

TEST

MEMORY

TEST

CHOICE:

the

TEST

number

pause a test.

To

return

to

computer

floppy

floppy

floppy

either

be

3-3

illustrates

disk

disk

drive

3.5-inch

corresponding

Press

the

EsC a second

the

Monitor

can

drive

drive

prompt,

support

and one

can

be

expansion

standard

the

floppy

and

to

up

added

card.

(720K)

hard

that

test.

select

to

two

hard

using

The

or

disk

Press

time

to

EXIT.

floppy

disk

drive.

the

intemal

high

drive

the

return

disk

An

ZCA-

floppy

(1.4M)

loca-

Figure

3-3.

.

HARD

3.6-INCH
DISK

Disk

MICROFLOPPY

msx/

7

\

DISF;K

DRIVE

MICROFLOPPY

DRIVE

Drive

Locations

DRIVE

I

)

Keyboard

Page

3-15

Operation

N

\

=

The

Z-2300

keyboard.

[

B

The

keys

briefly

in

Series

The

computer

keyboard

o]

is

supplied

is

illustrated

ragoe

|

=

Eosoeeer]

ALPHANUMERIC

KEYS

are

divided

the

following

Figure

3-4.

Enhanced

into

five

groups.

paragraphs.

with

an

in

Figure

come

[J

]

CURSOR

KEYS

Keyboard

These

groups

enhanced

3-4.

e

-

are

101-key

described

Alphanumeric
ing

information.

those

of a typewriter.

Numeric
numeric
When
ment

keys — These

data.

NUM

LOCK

functions.

keys — These

They

are

arranged

keys

They

are

activated

is

off,

these

are the

can

keys

primary

in

QWERTY

be

used

by

pressing

perform

keys

to

speed

the

cursor

used

fashion

the

NUM

and

screen

for

much

entry

LOCK

enter-

like

of

key.

move-

Page

3-16

Operation

Control
packages
a

function

ient

Cursor
in

Function

keys — These

such
to

these

to

use.

keys — These

the

Setup/Configuration

keys — These

software.

With

the

exception

keys,

switches.

single-pole,

all

the

The

single-throw,

as

word

control

of

keys

SCROLL

keys

are

processors

keys

keys

allow

program

keys

the

SCROLL

are

single-pole,

LOCK,

CAPS

push-to-make,

controlled

and

to

make

movement

discussed

are

assigned

LOCK,

single-throw,

LOCK,

by

software.

spreadsheets

the

program

of

the

more

cursor,

earlier.

special

CAPS

LOCK,

and

push-to-make

and

NUM

LOCK

push-to-break

Software

often

assign

conven-

such

functions

NUM

LOCK

keys

switches.

as

by

are

Chapter

Disassembly

4

chapter

This
reassembly,
structed

referred

Cover

1.

2.

3.

4.

otherwise.

to)

avoid

To
ginning

Removal

off

Turn

Disconnect

peripherals

the

Turn

locked)

Refer

secure

that

Read

shock

computer

the

from

panel

rear

Figure

cover

the

step-by-step

the

before

hazard,

the

4-1

contains

perform

completely

a

disassembly.

the

position.

to

steps

section

each

disassembling

WARNING

unplug

unplug

and

keyboard,

computer.

keylock

remove

and

the

to

instructions

reverse

the

in

(and

the

computer

the

it.

its

and

fully

monitor,

save

video

to

computer.

disassembly.

for

unless

order

before

and

seven

sections

be-

all

screws

previous

any

computer.

counterclockwise

the

For

in-

other

(un-

5.

6.

Remove

Support

puter.

cards

circuit

you

If
power
Replace

supply.

the

or

replacing

are

switch

this

cover

cover

the

cables.

bezel

panel

sliding

by

the

from

and

you

as

power

the

adhesive

the

toward

it

slide

back

the

off

it

supply,

corner

right

strip

front

avoid

to

remove

on

of

contact

the

of

the

the

plastic

the

chassis.

power

new

com-

with

Page

4-2

Disassembly

Circuit

Components
static

dling

circuit

1.

Remove

2.

Note

the

the

card

they

can

SCREWS

Figure

Card

electricity.

Removal

on

cards

the

cover

location

to

be

be

properly

some

Observe

during

and

removed.

e

4-1.

CAUTION

circuit

standard

removal

as

described

orientation

connected

Cover

cards

or

earlier.

of

If

necessary,

during

Removal

can

be

damaged

precautions

when

installation.

any

cables

mark

these

reassembly.

by

han-

connected

cables

to

so

3.

Refer

cuit

card

to

Figure

to

4-2

the

computer

and

remove

chassis.

the

screw

Disassembly

that

secures

Page

the

4-3

cir-

4.

5.

Remove
board

from

its

Store

ready

/

Figure

the

circuit

by

grasping

connector.

the

circuit

to

use

it

4-2.

card

it

card

again.

Circuit

at

both

in

from

Card

the

connector

ends

and

protective

e

Removal

on

sliding

packaging

it

the

backplane

until

it

until

is

you

freed

are

Backplane

1.

Remove

2.

Remove

Board

the

all

circuit

cover

Removal

as

described

cards

as

earlier.

described

earlier.

Page

4-4

Disassembly

3.

Disconnect

tors

on

the

orientation

4.

Remove

chassis

the

support

any

floppy

backplane

of

the

cables

two

screws

bracket,

and

hard

board,

for

reassembly.

that

as

shown

disk

as

shown

secure

cables

the

in

Figure

from

in

Figure

backplane

4-3.

the

4-3.

board

connec-

Note

the

to

the

5.

Free

the

and

out

Keyboard

1.

Remove

2.

Remove

Figure

4-3.

backplane

of

the

connector

Interface

the

cover

all

circuit

Backplane

board

as

described

cards

from

on

the

Board

as

described

Board

the

plastic

main

board.

Removal

earlier.

earlier.

Removal

support

and

lift

it

up

Page

4-5

Disassembly

3.

Remove

the

to
4-4,

the

main

screw

board

that

and

secures

computer

keyboard

the

chassis,

interface

shown

as

board

Figure

in

4.

Figure

the

an

lift

main

angle

Gently
on

at
keyboard

P501.

Keyboard

4-4.

keyboard

the

board,
by

connector

as

holding

interface

shown

down

lifting

and

Interface

in

the

Board

board

Figure

front

back

the

4-4.
of

Removal

from

Remove

the

the

of

connector

this

above

board

board

P501

board

the

above

Page

4-6

Disassembly

Speaker/LED

1.

Remove

2.

Remove

3.

Remove

4.

Remove

to

the

5.

Disconnect

on

6.

Slide

computer

Battery

1.

Remove

2.

Disconnect

main

the

all

the

the

chassis

the

main

the

chassis

Removal

the

board.

power

Removal

cover

as

circuit

cards

backplane

screw

support

the

speaker/LED

board.

LED

and

cover

as

the

battery

described

as

board

that

secures

bracket.

through

remove

described

cable

earlier.

described

as

described

the

speaker

cable

leading

the

opening

the

speaker/LED

earlier.

leading

earlier.

earlier.

to

to

connector

mounting

connector

in

the

front

assembly.

P509

bracket

P506

of

the

on

the

Main

1.

2.

NOTE:

will

be

current

re-enter

can

Lift

the

of

the

disk

Board

Remove

Remove

All

configuration

lost

once

P509

setup

information

correct

the

battery

from

drive

housing.

Removal

the

cover

all

circuit

the

as

described

cards

information

is

disconnected.

before

information

Velcro

as

described

removing

strip

earlier.

stored

If

reassembly.

after

that

secures

earlier.

in

the

Monitor

necessary,

the

battery

it

to

ROM

note

so

the

the

you

side

3.

4.

5.

6.

LED

Remove
pin

tor

Remove

Remove

Disconnect

the

the

assembly),

the

serial

port

to

the

rear

backplane

keyboard

the

cables

P507

six

threaded

connectors

panel

of

board

as

interface

leading

(power

the

supply),

hex

spacers

and

the

computer,

described

board

as

to

connectors

and

that

25-pin

as

shown

Disassembly

earlier.

described

P506

P509

(battery).

secure

parallel

port

in

Figure

Page

4-7

earlier.

(speaker/

the

two

connec-

4-5.

9-

HEX

gl

O

9_

>=—Ill

O

[=

7.

Remove

to

—

the

r

[)

.

G

@

@

U

I

T

T

I,

Figure

the

chassis,

al=

4-5.

remaining

as

shown

|

Main

four

in

REMOVE

scnews\

Board

screws

Figure

)

/=

o

0000

ez

REMOVE

SCREWS

=

|

Removal

that

secure

4-5.

‘f

P5°7

E

p6os

=

P501

R\

the

main

board

Page

4-10

Disassembly

HARD

ACCESS

DISK

LED

HARD

DISK

DRIVE

4.

5.

6.

Disconnect

remove

Remove

disk

Slide

the

drive

the
housing.
guide

track

the

same

Figure

the

front

the

two

housing,

hard

If

you

from

way.

4-8.

hard

disk

panel.

screws

as

disk

drive

are

replacing

the

Hard

shown

old

drive

Disk

access

that

secure

in

out

the

Drive

LED

Figure

from

disk

and

attach

Removal

cable

the

4-8.

the

drive,

from

hard

front

remove

it

to

disk

of

the

the

drive

drive

the

disk drive

the

new

and

to

the

plastic

drive

in

\_/

Page

4-11

Disassembly

Power

1.

Remove

2.

Disconnect

Disconnect
drives.

Remove
back

Remove
bottom

Lift

Supply

the

the

panel

the

of

the

the

power

Removal

cover

power

any

power

three

of

the

two

chassis,

supply

as

described

supply

connector

supply

screws

that

computer,

screws

as

from

that

shown

the

earlier.

cables

secure

as

shown

secure

in

Figure

chassis.

P507

from

connected

the

in

Figure

the

power

power

4-9.

the

supply

4-9.

supply

main

to

the

board.

disk

to

the

to

the

CHASSIS

Figure

4-9.

Power

i

Supply

REAR

Removal

PANEL

This

chapter
Series
ROM-based

All

jumpers

locations

computers.

circuit

and

describes

Setup/Configuration

boards

switches

of

the

major

VIDEO
CARD

KEYBOARD

INTERFACE

——

the

For

connector

illustrated

in

the

assemblies

%

jumper

pinouts

program,

in

this

factory

in

Chapter

Configuration

and

switch

chapter

settings.

this

computer.

settings

and

information

refer

to

are

Figure

BAC

KPLANE

MAIN

CIRCUIT

BOARD

Chapter

shown

5-1

I

BOARD

for

Z-2300

about

2.

with

shows

POWER
SUPPLY

POWER

SWITCH

BEZEL

5

the

their

the

Figure

5-1.

L

Major

Assemblies

BUILT-IN

DRIVE

CHASSIS

Page

5-2

Configuration

Main

main

The

and

tions

scribes

detail

more

Board

board
factory

jumper

each

following

contains

settings

briefly.

the

configurable

ten

illustrated

are

Some

table.

of

in

the

jumper

Figure

jumpers

blocks.

Table

5-2.

described

are

Their

5-1

loca-

de-

in

Figure

5-2.

Main

Board

Jumper

Locations

Table

5-1.

Main

Board

Jumper

Settings

Page

5-3

Configuration

N’

JUMPER

J501

J502

J503

J504

J505

FUNCTION

Parallel

Printer
Scanner

Parallel

Printer
Scanner

Parallel

Printer
Scanner

CHIPSpak

Unit

1

Unit

2

Unit

3

Unit

4

IBM

printer

80287

direct

8MHz
Optional
24MHz

16MHz

14MHz

port

use:

port

use:

port

use:

IC

selection:

compatibility

clock

(80286

clock

80287
oscillator
oscillator
oscillator

speed:

divide

oscillator

(not

(not

used)

by

two)

used)

SETTING

1-2*
2-3

1-2*
2-3

1-2*
2-3

1-2*

3-4

5-6
7-8

9-10*

1-2
34
5-6
7-8*
9-10

J506

J510

Parallel

Miscellaneous

port
Printer
Scanner

Color

video

SCP

control
Keyboard
Numeric
(CLKM)

use:

type

coprocessor

functions:

card

(AT

or

clock

XT)

mode

1-2*

2-3

1-2*
3-4*
5-6,

7-8

9-10*

Page

5-4

Configuration

Table

5-1

(continued).

Main

Board

Jumper

Settings

JUMPER

J511

J512

J516

*

Factory

J501-J503,

the
positions
With

scanner.

FUNCTION

Parallel

Parallel

Memory

setting

J506,

parallel

port

1-2

positions

As

with a printer

port

use:
Printer
Scanner

port

use:
Printer
Scanner

module

1M

SIMMs

A1,

A2,

B1, B2,

256K

SIMMs

A1,

A2,

B1,

J511,

is

to

be

jumpered,

2-3

jumpered,

shipped,

the

designated

type:

installed

B2

J512 — These

used

the

in

banks

C1,

C2

installed

in

with a printer

port

is

the

port

parallel

banks

configured

port

LPT1.

SETTING

1-2*
2-3

1-2*
2-3

1-2

2-3*

jumpers determine

or

with a scanner.

for

use

with a printer.

is

configured

is

configured

for

for

whether

With

use

with

operation

a

J504 — This

ports

of

use

the

This

jumper

J505

numeric

cording
Table

normally

This

—

coprocessor.

the

to

5-2.

jumper

determines

additional

on

requires

jumper

determines

Set

coprocessor

installed

no

this

jumper

version

the

port

select

cards

adjustment.

direct

the

in

combination

are

you

address

that

clock

using

may

as,

and

contain

with

for

J510

speed

described

allows

them.

the

ac-

in

J510

—
installed
With

no

forced

speed

the
that
pins
clock
3;

vided
more

Table

into
applied

coprocessor.

is

applied

9-10,

speed.

for

an

by

information.

5-2.

The

numeric

coprocessor

jumper

its

direct

to

installed

the

(Jumper

to

the

the

numeric

For

an

80C287

2.

Refer

J505

(CMOS

to

Numeric

coprocessor

for

direct

on

pins

clock

mode.

coprocessor

block

coprocessor.)

coprocessor

80287,

the

incoming

version),

the

description

Coprocessor

clock

or

divided

9-10,

This

will

J505

When

the

of

mode

jumper

clock

the

numeric

means

not

that

be

divided

determines

a

jumper

divides

clock

the

speed

incoming

J505

and

Settings

Page

Configuration

signals

mode

clock

to

operation.

coprocessor

the

direct

internally

the

clock

is

installed

incoming

is

divided

speed

Table

5-2

clock

speed

direct

is

5-5

the

is

by

on

by

di-

for

PINS
JUMPERED

7-8*
9-10
1-2

*

Factory

J516

setting;

—

This
installed
(jumper

cations
256K
When
C1,
installed

installed

A1,
or
this

and

C2
memory.

DIRECT

SPEED

16
14

8

MHz

jumper

in

locations

A2,

1M

SIMMs

jumper

must

MHz
MHz

use

on

B1,

this

and

is

only

CLOCK

80287

5.3

4.7

2.7

setting

defines

A1,

pins

for

installed

the

A2,

2-3),

B2;

locations

a

maximum

on

with

contain

EFFECTIVE
WITH

J510,

(divide

MHz
MHz
MHz

the

Z-416-C

type

of

B1,

and

256K

SIMMs

C1

pins

1-2,

1M

SIMMs

COPROCESSOR

PINS

by

3)

numeric

memory

B2.

As

must

and

of

3M

locations

for

9-10

INSTALLED

80C287

8

MHz

7

MHz

4

MHz

modules

set

be

C2

can

of

installed

A1,

a

maximum

SPEED

(divide

by

Coprocessor.

(SIMMs)

at

the

factory

installed

contain

in

either

memory.

A2,

B1,

of

6M

2)

lo-

B2,

of

Page

5-6

Configuration

Backplane

backplane

The

locations

Their

describes

5-3

Table

more

described

Table

JUMPER

J101

in

5-3.

Backplane

FUNCTION

Floppy

Board

board

and

detail

controller
Present
Not

present

contains

factory

jumper

each

following

Board

crystal

five

settings

briefly.

the

Jumper

(Y101)

configurable

illustrated

are

Some

of

table.

Settings

jumper

Figure

in

jumpers

the

SETTING

OFF
ON

blocks.

5-3.

are

J102

J103

J104

J105

*

Factory

Floppy

controller

Enable
Disable

Precompensation:

nS

125
187

nS

Hard

disk

drive

Conner

Other

Not

setting

40M

used

circuitry

manufacturer:

hard

disk

drive

ON*
OFF

OFF*
ON

1-2*

23

J101

—

Y101

is

not

jumper

J102

backplane
the
backplane

J103
value.
187

J104
hard
should

should

—

floppy

—

When

nS;

when

—

disk

be

This

jumper

present

not

This

jumper

board.

disk

drives,

board

by

This

jumper

the

jumper

it

is

This

jumper

drive

is

installed

should

on

the

be

installed.

activates

If

a

separate

disable

removing

sets

is

not

installed,

is

installed

present.

on

pins

be

installed

backplane

the

floppy

disk

controller

the

floppy

this

jumper.

the

floppy

installed,

the

value

on

For

other

2-3.

if

floppy

board;

the

pins

hard

if

Y101

controller

card

controller

disk

drive

precompensation

is

125

nS.

1-2

when

disk

drives,

Page

5-7

Configuration

controller

is

circuitry

is

used

cicuitry

precompensation

a

Conner

crystal

present,

on

to

control
on

value

40M

this

jumper

this

the

the

is

Video

To

avoid

be

certain

the

The

Z-449

constant

Hercules,

duced

RGB
Use
RGB

quency.

using

video

this

video

Card

damage

that

monitor

31.49

connector

video

and

Zenith

a

31.49

signals

signal

to

card

kHz

to

the

the

video

be

used.

can

produce

horizontal

480-line

kHz

analog

are

available

only

with

at

a

constant

CAUTION

video

card,

card

is

an

scan

(VGA-type)

RGB

at

video

monitors

31.49

the

mohitor,

properly

analog

frequency.

video

the

RGB

displays

monitor.

15-pin

that

kHz

horizontal

or

both,

configured

video

signal

CGA,

can

These

D-type

accept

EGA,

all

connector.

an

scan

for

at

MDA,

be

pro-

analog

analog

fre-

a

Page

5-8

Configuration

can

card

video

The

their

video
able

EGA

ard

Hercules

and

signals

at

in

9-pin

the

(RGBrgb),

(TTL

produce

also

standard

D-type

connector.

CGA

(RGBI

monochrome)

CGA,

form.

(TTL)

Use

RGB),

or

monitors.

EGA,

These

connector

this

MDA

and

MDA,

signals

monochrome),

(TTL

Hercules

avail-

are

stand-

with

Figure

lists

5-4
types,

Figure

shows

5-4

switch

the

including

certain

5-4.

the

and

Video

video

jumper

Zenith

JUMPER

P3

1

2

i

Card

switch

card

combinations

Data

Switch

and

Systems

Vit

VJ°2

JUMPERS

INSTALLED

____.D

and

jumper

for

video

CHo

9|
g”

CEwN

Fmy

—ON

Jumper

locations.

various

monitors.

<

15-PIN

CONNECTOR

Locations

Table

display

Table

5-4.

Video

Card

Configuration

Page

5-9

Configuration

MONITOR

(ZDS

TYPE

MODEL)

CGA(80x25)
(ZVM-1330,

CGA

monochrome

(ZMM-1470)

1360)

EGA(350lne)
(ZVM-1380-C)

EGA

monochrome

(ZMM-1470)

MDA

monochrome

(ZVM-1240)

Hercules

monochrome

(ZVM-1240)

SWITCH

1

2 3

OFF

OFF

OFF

OFF

OFF

ON

OFF

ON ON

OFF OFF

OFF

OFF

SECTION'

4

OFF

ON

OFF

ON

ON

OFF OFF

OFF

ON

OFF

ON

OFF

52

OFF

OFF

OFF

OFF

OFF

6

OFF

OFF

OFF

OFF

OFF

OFF

JUMPER

P1

P3

283

1&2

2&3

1&2

182

1&2

1&2

1&2

2&3

2&3

1&2

1&2

31.49

kHz

analog

RGB

(color)

or
multi-sync
(ZCM-1490,

31.49

kHz

analog

RGB
(monochrome)
(ZMM-149)

1390)

OFF

ON

ON

ON

ON

OFF

OFF

OFF

OFF

OFF

ON

ON

1&2

1&2

1&2

1&2

Page

5-10

Configuration

Table

5-4

(continued).

NOTES

Switch

1.
produced:

2.

Switch
cally

EGA
automode
or

3.

Switch

sections

CGA,

section 5 activates
switches
or

between

feature

parity

errors;

section 6 selects
(available
(available

at

at

the

the

1

EGA,

the

this

9-pin

through

MDA,

display

MDA

and

is

enabled,

switch

15-pin

D-type

Video

define

4

Hercules,

the

output

Hercules

should

between

D-type

connector).

Card

Configuration

the

or

automode

of

the

video

under

the

computer

normally

31.49

connector)

of

type

Zenith

480-line

feature.

card

software

cannot

be

kHz

and

video

(VGA-type).

Automode

between

control.

recognize

set

to

analog

standard

display

automati-

CGA

When

OFF.

RGB
(TTL)

be

to

and

the

NMI

signals

signals

Hard

The
ment.
drive

Floppy

One

in
factory-set
the
the

Figure
should
floppy

select

hard

Because

select

or

the

computer.

disk

other

5-5

disk

jumper

Disk

disk

Disk

two

for

drive

drive

normally

Drive

drive

installed

the

controller

jumper

is

not

Drives

1.4M,

3.5-inch

The

DS1.

If

two

cable

forces

B,

even

illustrates

drive,

location

the

require

refer

and

circuitry

used.

microfloppy

drive

select

floppy

one

though

drive

no

adjustment.

to

its

documentation

settings.

in

the

disk

drive

both

select

computer

is

part

disk

switch

drives

to

be

drives

switch

When

requires

of

the

hard

drives

can

on

an

installed

are

installed, a twist
designated
are

configured

location.

installing

to

determine

no

adjust-

disk

drive,

be

installed

drive

drive A and

as

DS1.

This

switch

another

the

drive

a

is
in

Page

5-11

Configuration

Figure

Keyboard

The

enhanced

AT-compatible
Zenith
the

The

Z-2300

tion.

Data

switch,

switch

Series

Systems

use

positions

5-5.

3.5-Inch

101-key

operation.

nameplate

a

small

screwdriver

are

computer,

Disk

keyboard

A

switch

on

labeled

this

switch

Drive

can

be

is

located

the

keyboard.

to

gently

AT

and

is

factory-set

Select

set

for

in

a

To

pry

the

XT.

For

Switch

either

recess

gain
nameplate

use

to

the

PC-

under

access

with

AT

posi-

or

the

to

up.

the

This

chapter

Series

computer.
nosing
setup/configuration
Chapter

The

troubleshooting

with a yes

the

next

either

or

»

The

directs

most

faults

3).

or

logical

both

fault

has

you

provides

Enough

to

information

no

answer

step

columns:

been

to

retest

corrected.

»

Further

action

is

perform a specific

information

information

the

circuit

procedure

for

most

by

the

YES

identified

the

fault

required.

test

to

isolate

Chapter

Troubleshooting

on

troubleshooting

is

included

card

level.

Verify

is

correct

is

before

in a question-and-answer

questions.

or

NO

column.

and

corrected.

area

to

verify

In

this

case

the

problem.

to

that

proceeding

You

will

If a "—"

In

this

that

the

step

assist

the

be

case

the

directs

the

Z-2300

in

diag-

hardware

(refer

form,

directed

is

shown

the

problem

you

6

to

to

in

step

is

to

The troubleshooting

Step

1:

Initial

Checks

Step

2:

Power

Step

3:

ROM-Based

Step

4:

Disk-Based

Step

5:

Comprehensive

Step

6:

Comprehensive

Step

7:

Power

Step

8:

Main

Step

9:

Floppy

Step

10:

Step

11:

Step

12:

Information

the

end

of

Up

Supply

Board

Disk

Hard

Disk

Video

Card

Keyboard

on

configuring

the

chapter.

Diagnostic

Drives

Drives

procedure

Disk

Read

ROM-Based
Disk-Based

and

Monitor

the

contains

the

Test

Fast

Tests

Diagnostic

Diagnostic

disk-based

following

steps:

Tests

Tests

diagnostics

is

included

at

Page

6-2

Troubleshooting

Error

Table
computer.

Messages

6-1

lists
Some

explanatory.

the

For

table.

steps

or
directed.
indicated

Table

MESSAGE

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

ERROR:

+++

Divide

+++

ERROR:

+++

ERROR:

+++

DISK

+++

DISK

+++

DISK

+++

DISK

+++

DISK

+++

DISK

+++

DISK

+++

DISK

+++

DISK

No

system
Not a bootable
+++

Non-maskable

+++

ERROR:

+++

ERROR:

FATAL:

indicated
If
in

6-1.

Please
Bad
CPU
ROM
Overflow!
RAM
Parity
Parity
Memory
Timer

Base

Extended
by
Keyboard

Invalid/No

ERROR:
ERROR:
ERROR:
ERROR:
ERROR:
ERROR:
ERROR:
ERROR:

ERROR:

Wild
Wild

Internal

you
the

zero!

the

error

messages

those

In

remaining

in

cannot

procedure.

Error

Messages

replace
configuration
failure!
checksum

failure!

memory

Drive
Bad
DMA
Disk
Sector
CRC
Invalid address
Seek
Invalid

partition

Interrupt!
Hardware
Stack

+++

hardware

failure!

Parity

interrupt

memory
+++
not

keyboard

not
disk
overrun!

not

not

error!

failure!

interrupt!

Failure,

+++
failure!

Address:

Failure!

size

responding

controller!

bootable!

data

Interrupt!

messages

isolate

cases,

messages,

table

the

perform

the

back-up

information

+++

XXXX:YYYY,Bit:
failure!
+++

+++

failure!

error!

size

error! SETUP:

code

ready!

+++

+++

found!

+++

+++

mark

+++

read!

+++

+++

System

further

no

the

battery!

Address:

+++

SETUP:

or

not

received!

+++

+++

detected!

+++

+++

Halted

that

can

specific

action

to

refer

perform

and

procedure,

+++

found

in

X,MODULE:

XXXX:YYYY,Bit:

XXXK

ACTUAL:

XXXXXK

connected!

+++

+++

be

generated

problems

troubleshooting

the

and

specified

is

procedure

the

replace

PROCEED

CMOS!

+++

XXX

X,

MODULE

YYYK

+++

ACTUAL:

+++

YYYYYK

are

the

TO

+++

by the

self-

the

in

step

as

device

STEP:

XXX

6,8
6,8
6,8
6,8

—
—_—

12
12

3,9,10

3,6,9,10

6,9,10

9,10
9,10
9,10
9,10

9,10
379,10
3,9,10

10

8
8
8
6

6
6
6

6

Page

6-3

Troubleshooting

Step

STEP

1

1a

ib

ic

id

1:

Initial

PROCEDURE

Is

there a specific

Did

the

Is

the

outlet?

Perform a "sense
Check
cabinet,
video
drives

for

proper
smell
overheated
you

detect

Locate
any

jammed

Checks

computer

computer

for

physical

disk

monitor.

for

disks

mechanical

the

computer

or

signs

and

replace

disk.

drives,

jammed

burned

customer

work

plugged

test"

Check

for

of

damage?

damaged

Proceed

complaint?

and

then

break?

into a working

of

the

computer.

damage

keyboard,

the

in

operation.

indications

components.

to

floppy

the

drive

parts

step

to

or

2.

the

and

disk

and

Also,

of

Do

free

YES

1a 1b

1c

1c

1d

NO

2

2

2

Step

STEP

2

2:

Power

PROCEDURE

Plug

the

and

tum

ply

should

reset,

and

ize.

You

blink

as
access
should

write
you

indicators

hear

heads

detect

Up

computer

it

on.

The

start,

the

disk

should

the

keyboard

some

of

the

anything

into a working

fan

in

the

the

keyboard

drives

see

the

keyboard

is

reset,

should

disk

light

noise

drives

unusual?

power

should

the

and

as

the
move.

outlet

sup-

should

initial-

LEDs

disk

you

read/

Do

YES

2a

NO

2d

Page

6-4

Troubleshooting

Do

you

2a

2b

(Such a beep

ware"

per

If

256K
B1
are
SIMM

2

for

Tum
lem

hear a slow,

has

not

half

of

the

SIMMs

and

B2,

installed

in

location

SIMM

the

computer

persist?

indicates
been

loaded

first

1M

are

installed

replace

in

them.

A1 - C2,

A1.

installation

on.

steady

that

the

into

of

RAM.)

in

If

1M

replace

(Refer

to

instructions.)

Does

beep?

"slush-

the

up-

locations

SIMMS

the

1M

Chapter

the

prob-

2b

2c

2d

—

2c

2e

29

Step

STEP
3

Replace

Did

Turn

step

Is

the

main

the

computer

off

the

1c,

and

then

there a readable

monitor?

Is

there a blinking

monitor?

3:

ROM-Based

PROCEDURE

Reset

CTRL-ALT-INS
itor
left

MFM-200
Memory
Enter

->

the

prompt

corner

Monitor,

Size:

"2?"

computer

key

should

of

the

for

board.

power

computer

to

step

display

cursor

Disk

combination.

appear

screen:

Version

xxxK

help

Repeat

up?

and

7.

on

on

by

pressing

x.x

step2.

proceed

the

the

Read

The

in

the

to

video

video

Test

the

Mon-

upper

—

2f

—_

3

3

YES

NO

Does

this

message

appear?

3b

3a

Page

6-5

Troubleshooting

3a

3b

3d

3e

Turn

off

the

step

8.

Type

TEST

and

test

menu

appear?

Insert a disk
have a backup
the

disk

be

inserted

drive

door

close

“Turn

the

Step

9.

Select
by

the

pressing

message

DISK

READ

TEST

COUNT = x

TYPE

<ESC>

Allow

the

least

30

message

computer

disk

should

TEST

TO

disk

seconds.

appear

computer

press

in

copy

and

RETURN.

drive A (be

of

easily

and

latch?

off

and

read

test

the 1 key.

appear:

ABORT

read

test

Does a device

on

the

screen?

this

and

from

The

to

proceed

Does

sure

disk).

Can

does

proceed

the

menu

following

run

for

error

to

the

you

the

to

at

3e

3f

3a

3d

3f

Step

STEP

4

Turn

the

computer

step

9.

4:

Disk-Based

PROCEDURE

Insert

the

(CB-31-2)

the

screen?

into

diagnostics

off

Diagnostics

disk-based

drive A and

menu

and

proceed

diagnostics

boot

it.

Does

appear

on

to

disk

the

Fast

YES

4d

Tests

NO

4a

Page

6-6

Troubleshooting

Insert

4a

another

and

boot

the

drive?

Use

another

diagnostics

bootable

drive.

copy

and

retum

Can

of

to

disk

you

the

step

into

drive

A

boot

the

disk-based

4.

4b

4e

4f

Proceed

Use
nostics
ing.
appear

the

(If

to

arrow

for

the

that

on

step

the
"Disk-Based
end

of

this

chapter.)

Does

an

error

on

the

screen?

Run

all

automatic

that

showed

Does

an

error

NOTE:

the

back

If

serial

test

you
ports,

included
diagnostics.
plug

(part

number

Refer

to

Table
appropriate
device.

9.

keys

to

select

computer

computer

menu,

Diagnostics"

or

an

error

or

fail

model

proceed

Run

fail

message

tests

in

message

you

section

the

for

the

suspect a problem

run

the

external

in

the

You

will

need a loopback

6-1

step

438-73)

to

and

proceed

replace

for

the

diag-

are

servic-

does

not

to

the

at

the

fast

test.

appear

the

device

fast

tests.

appear?

with

loop-

disk-based

this

test.

to

the

the

faulty

4e

4f

4h

4i

Turn

the

cover.

plied

Have

by

stalled?

Remove
by

Zenith

through

Repeat

the

problem

computer

any

Zenith

any

circuit

Data

4e.

Does

steps

2,

has

off

circuit

Data

Systems

cards

Systems.

the

problem

3,

and 4 to

been

corrected.

and

cards

not

Repeat

remove

not
been

supplied

steps

persist?

verify

the

sup-

in-

4h

4

4i

that

Page

6-7

Troubleshooting

Step

STEP

5

5a

5b

5c

5d

5e

5:

Comprehensive

PROCEDURE

Does

the

computer

disk

drive?

Boot

the

additional

ROM-based

drive.

Does

pear?

Proceed

step

10

Run

the

low

the

passes.

appear?

Proceed

Run

the

Test

the

of

keys
characters
a

problem?

disk

an

error

to

step 9 (floppy

(hard

disk

ROM-based

tests

to

Does

an

to

step

ROM-based

keyboard

and

verifying

are

displayed.

ROM-Based

have

more

drives

read

or

drives).

run

error

8.

by

and

test

fail

message

disk

memory

for

at

or

fail

keyboard

pressing a number

that

Do

than

run

on

drives)

tests.

least

message

the

correct

you

one

the

each

ap-

or

Al-

two

test.

detect

Tests

YES

5a

5b

—

5d

—_

5f

NO

5c

5¢

—

5e

e

59

5f

59

5h

Does

an

Proceed

Run

the

low

the

passes.
appear?

error

or

fail

to

step

12.

ROM-based

test

to

Does

an

message

power-up

run

for

error

or

appear?

at

least

fail

message

test.

ten

Al-

59

—_

5i

5h

—

6

Page

6-8

Troubleshooting

Refer

to

5i

appropriate
device.

Table

6-1

step

and

to

replace

proceed

the

to

the

faulty

Comprehensive

Step

6:

Diagnostics

STEP

6

6a

6b

PROCEDURE

Select
from

(enter
Run
puter.
pear?

Refer
appropriate
device.

test

the

the

NO

all

Does

to

Run

all

individually

Run

the

C

(combination).

message

normal

disk-based

when

prompted

automatic

an

error

Table

manual

sections

6-1

step

tests
(select

appear?

Disk-Based

test

for

the

computer

diagnostics

for

tests

for

or

fail

message

and

proceed

to

replace

by

selecting

SINGLE

marked M (manual)

Does

an error

fast

the

the

TEST).

menu

tests).

com-

ap-

to

faulty

each

or

the

or

fail

YES

6a

6a

NO

6b

Step

STEP

7

7:

Power

PROCEDURE

Is

the

computer

outlet?

Supply

plugged

into a working

YES

7b

NO

7a

Page

6-9

Troubleshooting

7a

7b

7c

7d

7e

7t

Plug

the

computer

and

return

to

Turn

the

computer

start?

Turn

the

computer

the

power
the
tors

continuity?

The

the

power

Turn
cover.

1).

Verify

supply

main

thing

Refer
place
results

cord

computer.

of

the

power

cord

the

computer

Perform a sense

that

are

board

appear

to

the

any

damaged

of

the

into a working

step

2.

on.

off

from

the

Check

cord

for

continuity.

cord

is

defective.

and

return

off

all

cables

properly

and

disk

drives.

normal?

appropriate

parts

sense

test.

Does

and

disconnect

outlet

and

all

three

to

step

and

remove

test

(see step

from

the

connected

Does

section

based

outlet

the fan

from

conduc-

Is

there

Replace

2.

the

power

at

the

every-

or

re-

on

the

79

7d

79

7c

7f

7f

79

7h

Disconnect
disk

drives

Does

the

fan

Refer

to

Figure
correct
each

correct?

output

disk

the

and

start?

voltages

drive

power

turn

6-1

and

power

cables

the

computer

verify

are

cable.

from

that

present

Are

they

the
on.

the

at

7i

7]

7h

7m

Page

6-10

Troubleshooting

—

(@@

©

@)

N’

7i

7]

7k

T

(ORANGE)

GROUND
(BLACK)

Figure

Reconnect

and

turn

drive

is

puter

fail

is

connected?

Turn

off

card

and

Does

the

(Repeat
has

been

plane

board.)

Replace

power

step

supply

2.

(RED)

6-1.

Disk

the

disk

drives

the

computer
reconnected.
to

start

when a particular

the

computer.

then

turn

fan

start?

this

process

removed,

the

drive

from

Drive

Power

one

on

Does

Remove a circuit

the

computer

until

including

that

prevents

starting.

at a time

after

the

each

the

Return

Cable

each
com­drive

board

back-

e

(RED)

Voltages

on.

the

to

L

OUND

(BLACK)

7k

71

+12VDC

(ORANGE)

7j

7m

71

7m

Replace

the

power

to

step

2.

Replace
computer
start?

the

supply

the

on.

circuit

from

power

Does

board

starting.

supply.

the

that

Turn

power

prevents

Return

the

supply

7n

Page

6-11

Troubleshooting

7n

Step

STEP

8

8a

Replace

and

2

corrected.

8:

the

verify

Main

main

that

Board

PROCEDURE

Attempt

system.
the
tempt

drives
disk

operating
the

Current
Enter

Does

Turn
cover.

1).
mation

jumpers

any

tings?

to

boot

a

If

computer

to

boot

are

installed,

into

drive

system.

following

Date

new

date

the

correct

the

computer

Perform

Also,

refer

in

Chapter

are

damage

hard

should

set

board.

problem

the

the

MS-DOS

disk

should

it.

from

If

insert

A

and

attempt

message

A

appear:

is

Tue

1-01-1980

(mm-dd-yy)

message

off

a

sense

to

the

configuration

5

and

correctly.

incorrect

or

Return

to

has

step

been

operating

is

drive

installed,

automatically

only

floppy

the

to

disk

MS-DOS

boot

similar

:

appear?

and

remove

test

(see

step

infor-

verify

that

the

Do

you

detect

jumper

set-

at-

the

to

the

—_

YES

3

8b

—_

NO

8a

8c

8b

8c

Correct

any
to
been

Are
Zenith

any

parts

step

2

corrected.

any

Data

computer?

jumper

that

appear

and

verify

circuit

Systems

that

cards

settings.

damaged.

the

problem

not

supplied

installed

v

Replace

Return

has

by

in

the

—_

8d

—_

8e

Page

6-12

Troubleshooting

8d

8e

8f

8g

8h

Remove
by

ZDS.

lem

persist?

Is

an error

screen?

Refer

to

step

indicated.

dicates
proceed

Attempt

step

in
keyboard

Do

the

shortly

Attempt
in
and
after
LEDs
disk

after

step

listen

you

light

drives

any

circuit

Repeat

message

Table

problem

a

to

step

boot

to

8.

Observe

you

as

LEDs

light

the

to

boot

8.

Observe

for

disk

turn

the

and

initialize?

cards

step

8.

displayed

6-1

and

If

the

error

with

8m.

MS-DOS

the

the

turn

and

computer

MS-DOS

the

drive

computer

then

extinguish

not

Does

proceed

message

main

the

as

LEDs

computer

then

turned

is

as

disk

drive

head

on.

supplied

the

prob-

on

the

to

the

in-

board,

described

on

the

on.

extinguish

on?

described

LEDs

movement

Do

the

as

the

8e

8t

8h

8i

8¢9

8j

8k

8i

8j

8k

8l

Does a blinking
display

Turn

keyboard.
problem

Turn
backplane
the

Turn

video

problem

appear

the

persist?

the

problem

the

card.

persist?

on

computer

Repeat

computer
board.

persist?

computer

Repeat

cursor

the

step

Repeat

step

or

other

screen?

off.

Replace

8.

off.

Replace

step

Replace

off.

8.

readable

the

8.

Does

the

the

Does

the

the

Does

8k

8m

8m

8m

8l

Page

6-13

Troubleshooting

8m

8n

Step

If

you

have a replacement
available
place
computer

(designated
screwdriver,
socket.
placement
certain
with

U526
socket.
properly
bent
step

Replace
2

and

corrected.

9:

Floppy

(part

the

ROM.

off.

Then

ROM

that

the

pin 1 location

and

press

Make

seated

under

or

8.

Does

the

verify

number

Begin

Locate

U526).

gently

pry

carefully

over

pin 1 of

the

sure

and

out

of

the

problem

main

board.

that the

Disk

Monitor

444-463),

by

the

Monitor

Using

the

ROM
position
the

the

ROM

on

the

new

ROM

that

the

that

no

the

socket.

persist?

Return

problem

Drives

ROM

turning

ROM

a

small

from

the

socket.

is

aligned

outline

into

ROM

pins

Repeat

to

has

been

re-

the

its
re­Be

for

the

is

are

8n

step

STEP

9a

N

9b

PROCEDURE

NOTE:
of

Can a floppy
A?

Inspect

problems.

Try

ejection

opening

remove

the

to

Be

sure

disks

the

Is

remove

button

the

the

used

there a disk

disk?

you

disk

drive

the

or

disk

have a backup

in

these

steps.

be

inserted

for

in

the

disk

by

pressing

by

closing

drive

latch.

copy

into

drive

mechanical

drive?

the

and

then

Can

you

YES

9e

9b

9e

NO

9a

9c

od

Page

6-14

Troubleshooting

9c

od

99

oh

9i

Replace
and

the

verify

disk

that

corrected.

Grasp

the

disk
small
ing

pliers.

it

up

Attempt

and

disk?

Insert a disk

disk

latch

into

Does

the

latch

Release

the
removed?

Remove

spect

latch

it

the

latch

release

the

for

damaged?

Insert a copy

drive

A.

Turn

the

CTRL,

ALT,

hold

them,

and

drive

from

A by
Monitor
access

prompt.

LED

light?

drive.

the

problem

with a pair

to

out.

Can

into

the

place

properly?

remain

and

and

disk

from

damage.

of

the

the

computer

and

INS

then

release

typing

Does

Return

of

tweezers
remove
you

remove

drive.

engaged?

eject

the

can

the

the

drive

Is

MS-DOS

on.

keys

in

sequence,

them.

BFO

the

drive A disk

to

step

has

it

Does

disk.

disk

and

the

disk

at

been

by

lift-

the

the

Did

be

in-

disk

Press

Boot

the

2

or

in

9e

of

99

Sh

9

9j

9c

9c

9¢c

9

9i

9k

9j

A

message

should

Current
Enter

Does

appear:

Date

new

date

this

message

similar

is

Tue

(mm-dd-yy):

appear?

to

the

1-01-1980

following

9k

Page

6-15

Troubleshooting

9k

9l

9m

9n

90

Inspect
drive.

the

all

Are

drive

cables

they

and

properly

the

nectors?

Seat

the

connectors

step

9j.

Does

the

pear?

Replace
backplane
peat

step

the

board

9j.

cable

Does

appear?

Does

the

computer

drives

installed?

Disconnect,

but

do

Insert a bootable

drive B and
drive

by

prompt.

typing

Does

attempt

the

pear?

leading

seated

backplane

properly

correct

leading

to

the

disk

the

correct

have

two

not

remove,

MS-DOS

to

boot

BF1

at

correct

message

to

the

on

board

and

repeat

message

from

drive.

message

floppy

drive

disk
from

the

Monitor

disk
both
con-

ap-

the

Re-

disk

A.

into

this

ap-

9m

90

9

9l

9m

9n

9q

9q

9

9q

Replace

verify

rected.

Replace

drive

that

the
step 2 and
been

corrected.

A.

Return

the

problem

backplane

verify

that

to

has

board.

the

problem

step 2 and

been

cor-

Return

to

has

Page

6-16

Troubleshooting

Step

STEP

10

10a

10b

10c

10d

10e

10:

Hard

PROCEDURE

Inspect

cable

leading

damage?

Replace

to

step

4 to

been

corrected.

Turn

the

cess

LED

Is

the

computer

from

the

Did

the

hard

Attempt
typing

BW
message
appear:

Disk

the

hard

to

any

damaged

verify

computer

light?

hard

disk

disk

to

boot

at

the

similar

Drives

disk

drive

it.

Do

you

parts

that

the

problem

on.

Does

configured

drive?

drive

boot?

from

the

hard

Monitor

to

the

following

and

detect

and

return

the

disk

to

autoboot

disk

prompt.

should

the

any

has

ac-

by

A

YES

10a

NO

10b

10e

10f

10f

Current
Enter

new

Does

the

Does

the

No

system

appear?

date

is

date

correct

message

Tue

1-01-1980

(mm-dd-yy):

message

appear?

10g

10f

10h

Page

6-17

Troubleshooting

10g

10h

10i

10j

Attempt

disk.

Insert

and

boot

at

the

ing

system

XCOPY

peat

step

appear?

sage

Turn
cover,
the

cables

for

signs

damage

Replace

from

boot

Replace

PREP
install
(Refer

for

more

ting

up

time.)

drive?

Can

to

install

a

from

Monitor

A:

C:

10e.

the

computer

and

perform

leading

of

damage.

or

improper

any

the

the

utility

and

MS-DOS

to

the

detailed

a

hard

you

MS-DOS

copy

of

that

drive

prompt.

prompt

/V

and

Does

a

to

damaged

disk

hard

hard

disk

return

on

the

MS-DOS

information

disk

boot

on

the

MS-DOS

When

by

in

drive
typing
the

operat-

appears,

press

RETURN.

the

off,

sense

the

hard

Do

you

correct

remove

test.

disk

detect

mes-

Check

drive

configuration?

cables.

drive

drive.

new

to

Can

now?

step

hard

Run

10g

disk.

documentation

about

drive

for

the

from

the

hard

disk

hard

A

BF1

type

Re-

the

any

you

the

to

set­first

10i

10h

10j

10

10k

10k

10l

Replace

from

boot

Replace

2

corrected.

and

the

verify

the

backplane

hard

the

main

that

disk

board.

the

problem

board.

drive?

Return

Can

to

has

you

step

been

Page

6-18

Troubleshooting

Step

STEP

11

11a

11b

1ic

11d

11:

Video

PROCEDURE

Perform a sense
monitor
detect

Repair
and

Verify

monitor
propriate
of

seated

Seat

and

Refer

Chapter 5 and

is

video

card

and

any

damage?

or

replace

return

to

step

that

the

is

securely

D-type

the

video

properly?

the

video

proceed

configured

configured

to

to

the

monitor

test

on

the

computer.

any

2.

video

connected

connector

card.

"Video

verify

properly

being

Is

cable

connector

step

11d.

that

used.

properly?

both

damaged

cable

on

the

Card"

the

for

the

Is

the

video

Do

you

parts

from

the

to

the

ap-

the

back

connector

properly

section
video

the

card

type

video

of

of

YES

11d

11e

NO

11b

11c

11d

11e

11f

11g

Turn

the

on.

Is

anything

display)

Make

sure

working

on

the

monitor

Adjust
trols

on

on

the

the

screen?

computer

(including

visible

on

the

monitor

outlet.

Is

lit?

brightness

monitor.

the

and

the

screen?

the

power-on

Is

video

an

is

plugged

and

contrast

anything

monitor

unreadable

into

a

indicator

con-

visible

11g

11g

11h

11f

11n

110

Page

6-19

Troubleshooting

11h

11i

1]

11k

111

11n

Is

the

display

Does

the

monitor
display
known

Does

computer

known

~Are

Zenith
computer?

Turn
connect
not
Tum
Does a display

Return
problem

Replace
step 2 to
been

when

good

the

problem

is

good

any

circuit

Data

the

computer

and

supplied

the

computer

to

step 2 and

has

the

verify

corrected.

readable?

produce a readable

connected

computer?

persist

connected

monitor?

cards

Systems

and

remove

by

Zenith

appear?

been

corrected.

video

monitor

that

to

an

to

an

not

supplied

installed

monitor

any

circuit

Data

and

monitor

verify

and

the

problem

identical,

when

the

identical,

by

in

the

off.

Dis-

cards

Systems.

on.

that

the

return

to

has

11k

11k

111

11i

11j

110

110

11p

11q

Replace

ter 5 and
erly

for

the

used.

Check

tings

carefully.

monitor

Replace

display

Replace

2

corrected.

and

on.

appear?

the

verify

the

video

card.

configure

type

the

Does a display

the

backplane

main
that

of

video

switch

Turn

board.

the

the

Refer

new

monitor

and

the

computer

appear?

board.

Return

problem

to

Chap-

card

being

jumper

Does

to

has

prop-

set­and

11p

a

step

been

Page

6-20

Troubleshooting

Step

STEP

12

12a

12b

12:

Keyboard

PROCEDURE

Inspect
tor,

is
puter.

the

and

cable.

secure

Do

Replace

cable.

Proceed

Turn

the

ALT,

and

them,

should

and

see a message

following:

MFM-200

Memory
Enter

->

Does

Monitor,

Size:

"?"

the

keyboard,

Make

at

both

the

you

detect

the

damaged

to

computer

INS

keys

then

xxxK

for

help

correct

keyboard

sure
keyboard
any

step

12b.

on.

Press

in

sequence,

release

Version

message

connec-

the

connector

and

damage?

keyboard

the

them.

similar

x.x

appear?

com-

CTRL,

hold

You

to

or

the

YES

12a

12c

NO

12b

12f

12c

12d

Type

TEST

word

TEST

screen?

Type

TEST

the

keyboard

The

keyboard
character
across
correct

the

display

at

the

displayed

and

test

code

message

top

of

appear?

Monitor

accurately

press

RETURN.

by

pressing

test

identification

should

the

screen.

prompt.

the 2 key.

appear

Does

Is

the

on

the

Select

and

the

12d

12e

12f

12f

Page

6-21

Troubleshooting

12e

If

there
about
question

that

the

there

is

keys

individually

rect

characters

detect a problem?

12f

Replace

step

12.

the

replacement
detect
original

129

Replace
Repeat

sist?

Disk-Based

The

ROM-based

for

loading
diagnostics
puter’s

Use

the

and

contain

circuitry

following

is a specific

the

keyboard,

by

pressing

correct

no

specific

customer

character

problem,

and

are

displayed.

the

keyboard

After

testing

keyboard,

the

same

problems

keyboard?

the

keyboard

step

12b.

Does

Diagnostics

tests

check

running

and

the

disk-based

comprehensive

the

interfaces

procedure

to

test

the

them

and

is

displayed.

verify

that

and

the

operation

as

interface

the

problem

all

functions

routines

required

run

the

complaint

keys

in

verifying

If

press

the

the

cor-

Do

you

proceed

to
of

do

you

with

the

board.

per-

of

the

diagnostics.

to

check

to

operate

disk-based

12f

129

2

2

8 2

computer

The

required

disk-based

both

the

peripherals.

diagnostics:

com-

1.

2.

Turn

the

power-up

computer
step.

Press

the

then

release

the

disk-based

press

RETURN

computer

tests.

If

starts

to

CTRL,

ALT,

them.

diagnostics

to

boot

on

and

the

Monitor

autoboot

and

INS

When

the

the

diagnostics

correct

prompt

from

keys

Monitor

disk

into

any

faults

(->)

a

disk,

in

sequence,

prompt

drive

disk.

detected

appears,

proceed

hold

appears,

A.

Type

or

to

the

them,

BF1

by

the

if

the

next

and

insert

and

Page

6-22

Troubleshooting

3.

At

the

opening

to

the

computer

shown

tion

documentation

4.

When

either
proceed
cated

5.

After

again

on

file

for

prompted

"all

with

by

the

you

to

verify

this

the

automatic

the

test

have

menu,

menu,

computer.

for

that

select

you

are

you

the

procedure.

for

the

tests"

diagnostics.

results.

replaced

all

problems

the

model

servicing.

will

have

Refer

to

fast

test,

or

"manual

Replace

the

faulty

have

number

If

the

model

to

create a new

the

disk-based

choose

tests"

any

faulty

device,

been

run the

corrected.

corresponding

number

configura-

diagnostics

NO.

Then

as

necessary

devices

diagnostics

is

not

select

and

indi-

Chapter

7

Table

7-1

lists

parts,

refer

to

the

Table

PART

HE-89-0065
HE-90-1395-1
HE-90-1402
HE-134-1968

7-1.

NUMBER

134-1981

Z-2300

\__~+150-0307-3

HE-151-1030
HE-151-1032
HE-151-1066-C1
HE-163-0040-4

HE-181-7595-10

HE-181-7600-1F
HE-181-7601-1C
HE-200-1583
HE-203-2373
HE-210-0140
HE-234-0908

HE-266-1244
HE-266-1295
HE-266-1296
HE-418-0060

95-4074

only

field-replaceable

Z-2300

40M,
20M

Keyboard
Main
Backplane

Chassis

Front
Plastic
Power
Lock
Plastic
Plastic
Battery,
Professional

Series

Series

DESCRIPTION

Line

Cabinet
Cabinet
34-conductor
40-conductor

Z-449

1.4M,

101-key

Parts

cord

(cover),
(cover),

video

3.5-inch

3.5-inch

3.5-inch
keyboard

interface

board

(bottom)

panel

power

supply

guide

guide

3.6V

Service

List

painted

vinyl
floppy
hard

disk

card

microfloppy

hard

hard

disk

board

(attached

switch

track

(hard

track

(floppy

lithium

Desktop

parts.

Manual

clad

disk

drive

drive

disk

drive

drive

board

to

cover)

panel

disk

in

molded

Computer

For

cable

disk

drive)

disk

Parts

a

complete

(585-299).

cable

drive

drive)

case

Owner’s

list

Manual

List

of

all

IURN

[T