Zenith Z-486 25E Service Manual

ZENITH

data

systems

Groupe

Bull

=

==

]

Z-486

EISA

Service

860-243

|

05

/

Computer

Manual

25E

)

SAS0344

Copyrights

and

Trademarks

Copyright © 1990

This

material

the

clause

or a civilian
of

the

contract

49085.

Hercules
MS-DOS

0S/2

is a trademark

TIGA

is a trademark

Printed

Zenith
St.

in

Data

Joseph,

may

at

DFARS

agency

or

All

other

is a registered
and

XENIX

the

United

Systems

MI

49085

by

Zenith

be

of

Data

reproduced

252.227-7013

the

Government,

subcontract

rights

reserved.

trademark

are

registered

of

IBM.

of

Texas

States

of

Corporation

Systems

by

or for

(Oct.

1988);

this

with

Zenith

of

Hercules

trademarks

Instruments.

America.

Corporation.

the

U.S.

Government

or,

if

provided

material

Data

may

Systems

Computer
of

Microsoft

pursuant

under a contract

be

reproduced

Corporation,

Technology,

Corporation.

to

in

accordance

Hilltop

Inc.

the

copyright

or

subcontract

Road,

with

St.

Joseph,

license

with

the

provisions

Michigan

under

NASA

Contents

Chapter 1 —
Related
TOOIS' v s s s w s
Safety

BaseComputer . . . .

Optional
Chapter 2 —

POWEXrUD
Resettingthe
The

Chapter 3 —
StaticPrecautions
Troubleshooting
Power<Up
StatusLEDS
Troubleshooting

Materials . . . .

Precautions

Monitor

Entering
BootCommand

UserTests . . . . v v v v v i e i e et

Introduction

mis B e

e

. . .

Hardware . . .

Operation

: s v s

w5

wso5

Computer

Program

the

Monitor

Troubleshooting

Procedure

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Charts

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

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

2-3
2-3

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

3-3
Disk-Based
Power-Up

and

Diagnostics

Error

Messages . . . . . .

. . . .

... ... ...

..

.........

...

.......

3-18
3-18

iv

Chapter 4 —
Managing

Disassembly

Power

Supply
StaticPrecautions
Cover

Removal/

Circuit

Card
Backplane
4167

Coprocessor

Installation

Removal/Installaton . . .

Card

Removal/Installation . ..

Installation
OEMROMInstallation
System
SIMM
Disk

Real-Time
Real-Time
Card
Keylock
Power
Hard
System
Power

Memory

Card

Installation/Removal

Drive

Installation

Optional
Optional
Optional
Replacing
Replacing
Mounting
Blank

Guide

Disk

3.5-Inch

5.25-Inch
SCSI

Panel

Clock
Clock

Removal/

Removal/

Switch

Drive

Board

Supply

Tape

the

Standard

the

Standard

DiskDrives . . . . .

Removal

IC

ICDisposal . . . ..

Installation

Replacement

Access

Removal/

Removal/

and

Capacity

. . . . . . .

. .

. .

...

Removal/

. . . . .

. . .

...

Floppy

Disk

Floppy

Disk

Backup

3.5-inch

3.5-inch

.

...

Replacement

Installation

. . . .

LED

Replacement
Installation
Installation

Options

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Drive

Installation

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Installation

Hard

Disk

Drive

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..

..

..

..

4-1
4-2
4-2
4-3
4-5
4-6
4-7
4-8

4-9
4-11
4-13

4-14
4-15

4-18
4-20
4-23
4-24

4-25
4-26
4-27
4-28

4-29
4-30
4-31

Contents

TIGA

VGA

Daughtercard

Chapter 5 —

Hardware

Replacement

Configuration

StaticPrecautions . . . . .

Disk

Controller

High

Performance

Z-649

TIGA

181-7891-10)

Keyboard . « «

Chapter 6 —

Card

Video

Parts

(Part

VGA

Card

.=

: v s

s v s s

List

Number

Card

with

56

Specifications

. . . . . .

. . .

..

.ot

240-7926-10)

(Part

Number

VGA

Daughtercard

555

nw s GG s mE G s @ wE

240-7940-10)

(Part

cm 6 o s sim o mos

..

...

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e

.

..

... . ..

Number

w0 s oo

...

e

s F o

oo 3 v

4-32

5-1

5-2

5-2

5-3
5-4

The

Z-486/25E™

(Extended

Industry
workstation.
maintaining

and

software.
memory
(single
EISA

compatible

memory

The

ECU
puter
allows
the

monitor
install
effort

tion

on

tures

backward

on

the

in-line

is

provided

(EISA

introduces a new

the

user

screen.

options

spent

setting

the

ECU,

include:

is a high

Standard

EISA

architecture

compatibility

The

computer

system

memory

cards

memory
modules),

in

on-board

Configuration

concept

to

select

This

primarily

switches

refer

to

performance,

Architecture)

offers

supports

board

or

the

EISA

expansion

the

80486

Utility)

in

hardware

options

allows

through

the

and

the

software

or

installing

Z-486/25E

Introduction

25

MHz

80486-based

PC/AT-compatible

increased

with

from 4 to

using

up

to 4 gigabytes

software

set

parameters

user

Owner’s

processing

traditional

1-

PC/AT

64

megabytes

or

4-megabyte

of

slots.

8K

of

microprocessor

supplied

configuration.

using a model

to

configure

the

with a minimum

jumpers

(for

further

Manual).

memory

chip.

with

system

Chapter

EISA

personal

power

cache

Other

while

hardware

of
SIMMs

using

this

com-

The

ECU

on

and

of

time

informa-

fea-

and

1

e

VGA-compatible

e

Two

serial

e

One

bi-directional

e

1.4M,

3.5-inch

e

80M

or

(depending

e

5.25-inch

e

5.25-inch

ports

200M

on

floppy

tape

video

parallel

floppy

IDE

(Integrated

model)

disk

backup

output

disk

drive

drive

(or

port

drive

Drive

support

support

TIGA™

Electronics)

depending

on

hard

model)

disk

drive

e

Real-time

e

101-key

e

Password

e

Supports

®

Mass-storage

e

Five

EISA

—

ISA

—

Three
cards

e

80486

e

Weitek

clock

keyboard

protection

MS-DOS®,

controller

expansion

backward

of

the

to

the

system

internal

4167

numeric

with

calendar

XENI.X®,

with

slots

compatible

five

slots

numeric

coprocessor

coprocessor

and

SCSI,

are

available

OS/2™

floppy,

support.

operating

and

for

adding

systems

IDE

ports

optional

expansion

Figure

This
procedures

1-1.

manual

The

Z-486/25E

includes

to

the

major

Personal

operation,

assembly

Workstation

configuration,

level.

and

troubleshooting

Introduction

Related

Materials

The

following

e

7-486/25E

e

TM-4100

e

Disk-Based

materials

Owner’s

Technical

Diagnostics — Model

are

available:

Manual — Part

Reference

number

Manual — Part

Number

CB-31-08

595-4715

number

(3.5-inch).

595-4858

Tools

Safety

Precautions

AN

Use

the

#1
#2
3/16-inch

Adjustable

3/16-inch
9-pin
25-pin

Warning:
tions

e

Disconnect

e

Remove

e

Verify

following

Phillips
Phillips

serial

parallel

Avoid

when

servicing

correct

tools

screwdriver
screwdriver

flat-bladed

wrench

hex

nutdriver

loopback

loopback

shock

this

AC

power

all

jewelry.

line

cord

to

install,

screwdriver

connector

connector

and

personal

computer:

before

opening

selection.

maintain,

(Part

number

(Part

injury.

the

and

repair

438-73)

number

Use

the

cabinet.

this

computer:

438-64).

following

precau-

Base

Computer

e

Use a grounded

The

base

computer

tions,

keyboard

The

base

computer

System

Bus

System
Secondary

disk
High-Performance

with
Enhanced
Disk
Cabinet
Power

board

extender

memory

drive,

VGA

drive

Supply.

AC

power

provides

and

video

interfacing.

contains

card

card

storage

depending

daughterboard

101-key
controller

the

(backplane)

(3.5-inch

on

VGA

video

keyboard

card

source.

all

processing

following

1.4M

model)

card

depending

functions,

major

floppy

drive;

(or

1024 x 768

on

model)

disk

drive

assemblies:

80M

or

TIGA

opera-

200M

video

hard

card

Introduction

System
cessing

Board — The

and

interfacing

system

within

board

the

computer:

contains

all

circuitry

for

pro-

80486
Posted
High
EISA
System
Non-volatile
Real-time

Serial,

Bus

Extender

bus

slot

on

board

to

the

bus)

which

System
SIMM

parity

installed
may

Memory

sockets

bits).

in

be

installed
followed
the

system
system
lation

board.

of

additional
megabytes
expansion
EISA

or

ISA

CPU

with

internal

Write

Array
performance
and

ISA

bus

control

Control

Processor

configuration

Clock/Calendar

Parallel,

and

Card

the

system

five

EISA

reside

on

this

Card — The

each with a 36-bit

For

maximum

pairs

to

form a 64-bit

in

any

by

four

megabyte

board

in a proprietary

The

card

memory.

of

memory

beyond

bus

this

memory

Burst

numeric

Mode

co-processor

Memory

Controller

logic

and

Interface

storage

Keyboard

port

communication

(Backplane) — This
board.
bus

It

provides

slots

(including

the

the

card.

system

order

pairs).

system
wide

wide

(for

memory

data

path

performance,

memory

example,

The

one

system

connector,

may

be

easily

removed

The

installed

card

may

cards

on

plugged

computer

this

be

accomplished

comes

card

into

logic.

card

occupies

signals

PC/AT

card

(32

SIMMs

bus.

from

the

signals

contains

data

bits

should

The

SIMM

megabyte

memory

card

perpendicular

to

allow

for

standard

(1M

SIMMs).

by

using

the

bus

extender

the

only

system

of

the

sixteen

and

be

pairs

pairs

may

plugs

to

the

easy

instal-

with

4

Memory

optional

card.

ISA

4

be

into

Secondary

floppy

720K,

1.4M,

360K,

1.2M,

The

computer

interface.

with

either

In

addition

magnetic

Storage — The

disk

drives:

3.5-inch

3.5-inch

5.25-inch,

5.25-inch,

accepts

Depending

an

80M

to

the

tape

back-up

High-Performance

VGA

register
Hercules®
placed

are

shipped

(1024 x 768).

through

in

any

with a TIGA

compatible,

of

the

The

functions.

(comes

half-height

half-height.

any

3.5-inch

on

model

or

200M

above

drives,

unit.

VGA

while

BIOS

calls.

open

slots

video

TIGA

card

computer

standard

number,

IDE

hard

the

Video

supporting

It

is
on
card

supports

with

base

hard

disk

the

computer

disk

drive.

computer

Card — This

EGA, CGA,

an

AT

compatible

the

bus

extender

that

offers

has a daughterboard

these

four

computer)

drive

with a SCSI

comes

will

accept a 5.25-inch

16-bit

VGA

MDA,

card

that

card.

Some

very

high

resolution

to

provide

types

of

or

IDE

standard

card

is

and

may

models

VGA

be

Introduction

1-5

Optional

Hardware

Enhanced
detacheable

Disk

computer

disk

drives,

Systems

Note:
506

types

factory-supplied

ST-506

Cabinet — The
the

monitor

Power

+5

VDG,
Chapter 4 in
capacity

The

following

101-Key

101-key

Drive

Controller

is a high-performance

two

IDE

Interface)

The

factory-supplied

of

hard

controller

controller

cabinet

on

top,

Supply — The

+12

VDC,

this

when

adding

options

ZA-3800-ME
ZA-3800-MK
ZA-3800-TD
ZD-144
ZD-12-A
ZA-3700-CS

3.5-inch

5.25-inch
Computer

Keyboard

keyboard.

Card — The

hard

disk

peripherals

disk

drives.

card

card

(and

may

or

may

power

and

-12

manual

for

hardware

are

available

1M

RAM

Expansion

4M

RAM

Expansion

150M

SCSI

1.4M

Internal

1.2M

—

The

controller

drives,

drive

If

CFG

sit

be

used

and

(daisy

chained).

controller

an

ST-506

must

be

file).

flat

in a desktop

on

supply

VDC.

See

information

options.

for this

Tape

Drive

Floppy

Internal

Floppy

Stand.

computer

disk

controller

which

seven

card

type

replaced

end

as a tower

provides

the

the

Specifications

on

managing

computer:

Kit
Kit

Disk

Disk

comes

with

card

used

supports

SCSI

does

drive

with

two

(Small

not

support

is

to

be

an

appropriate

configuration

configuration.

following

section

power

Drive

Drive

a

in

this

floppy

Computer

ST-

used,

the

with

outputs:

and

supply

Introduction

Power

Up

This

chapter
program,
tion.

Turn

the

panel.

When

power

e

The

o

The

e

Disk

covers

and

other

computer

is

applied:

power

supply

keyboard

drives

initialize

power-up,

operating

on

using

fan

starts

resets

(status

(access

resetting

information

the

power

LEDs

blink),

indicators

the

computer,

for

switch

NUM

light,

Chapter

Operation

the

Monitor

the

Z-486/25E

mounted

LOCK

heads

on

the

remains

seek)

worksta-

front

lit

2

e

Internal

power-up

e A blinking

e

The

operating

disk

drive

If

the

operating

one

of

the

following

+++

DISK

No

bootable

Non-system

Not a bootable

Refer

to

the

operating

system

If
sages
display).
and

the

computer
may

Error

software.

appear

For

further

Messages”

cursor

system

(when

system

ERROR:

disk

detects

on

self-tests

appears

on

loads

autoboot

is

error

partitions

partition

system

faults

the

option

not

installed,

messages

Drive

documentation

during

display

information

in

Chapter

complete

the

display

from

the

is

configured).

or

appears:

not

ready!

the

(if

the

computer

on

error

3.

hard

disk

it

is

not

+++

for

installing

power-up

messages,

drive

present

on

sequence,

can

drive

consult

or

the

floppy

the

disk,

operating

error

mes-

the

“Power-Up

2-2

Resetting

Computer

The

Program

Monitor

the

There

are

three

1.

Press
This

resets

autoboot

2.

Press
resets

program.

3.

Turn

the

circuits

The

MFM-400

e

Power-up
or

an

operating

e

The

boot

e

User-selectable

different

and

hold

the

sequence.

and

hold

the

CPU,

computer

are

Monitor

tests

command

the

CTRL,

CPU,

the

CTRL,

reinitializes

off,

reset

to

the

program

to

detect

system

to

tests

to

ways

to

reset

ALT,

and

reinitializes

ALT,

wait

INS

the

15

the

computer

seconds,

power-on

contains:

problems

from

loading

load

the

operating

check

the

disk

the

computer:

DEL

computer

keys,

state.

that

would

drives,

keys,

then

and

then

turn

prevent

system

keyboard,

then

release

and

initiates

release

enters

it

additional

them.

the

back

and

them.

the

This

Monitor

on.

All

tests

memory

Entering

Program

the

Monitor

e

Video

commands

e

Programming

Use

the

following

CTRL-ALT-INS

then

The

first
much
third
shows

release

MFM-400

Memory

Enter

->

line

them. A message

line

memory

gives

the

Monitor

for a command

Once

the

computer

mark

(?)

and

summary

menu.

to

commands.

command

—

Press

Monitor,

size:

"?"

xxxK

for

indicates

is

installed,

the

syntax
prompt

to

be

entered.

has

press

ENTER

display a color

to

enter

and

hold

the

similar

Version

+

xxxxK

help.

the

ROM

version.

including

for

the

help

indicating

entered

the

to

display

bar

the

Monitor

CTRL,

to

the

x.xx

The

base

and

command.

the

Monitor

Monitor

the

Monitor

or set

video

program:

ALT,

and

following

second

extended

The

program

program,

program

and

scroll

modes

INS

keys

and

appears:

line

indicates

memory.

fourth

is

how

The

line

waiting

type a question

command

Operation

All of

the

commands

Use

the

syntax

then

press

ENTER.

invalid

e

®

e

command

Brackets [ option ] indicate

Braces { choice | choice } indicate a choice

Angle

braces

listed

(exact

command

If

the

was

entered.

<variable>

in

the

syntax

indicate

command

entry)

is

wrong,

The

command

optional

summary

shown,

the

computer

type

syntax

entries

of

specified

variables.

may

the

command,

uses:

entries

be

used.

reports

that

2-3

an

Boot

User

Command

Tests

The

boot

memory.

process
The

loads

command

the

operating

syntax

B[{F|W}1[{0|1|2|3}][:

Extend

winchester, a reference

more

and

Error
tent
correct
refer

Notice:

possible

XR

ECU
command
a

The

test
lowing

the

than

partition

messages

drive.

boot

to

Chapter 3 in

If

to

will

load a default

program

way

as

to

Monitor

menu,

menu

boot

command

one

drive

numbers

appear

To

correct

command.

the

computer

boot, use

should

is

useful

make

it

program

type

TEST

appears:

to

to

the

type

is

installed,

as

required.

if

an

this,

access

For

more

this

manual.

has

the

XR

configuration

then

only

when

unbootable.

contains

at

the

system

from a disk

is:

<PARTITION>]

BF

(boot

from

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disk)

to

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add

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command.

be

Monitor

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the

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configured

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and

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reconfigure

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to

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computer

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press

into

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drive.

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numbers

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or

1)

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and

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the

error

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that

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such

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the

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to

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to

the

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select

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time

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track O on
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keyboard.
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code each

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the

test

drive.

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computer

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during

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about

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read

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PRINT
SCROLL
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TM-4100

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listing

of

scan

codes

Technical

for

this

computer.

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Manual

contains

a

Operation

Base

Memory

system

While

the
reaches
played

memory

test

the

video

on

the

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map,

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screen.

memory

including

area, a series

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in

the

first

memory,

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of

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megabyte

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patterns

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the

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2-5

test

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byte

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used

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Disk
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base

memory

no

patterns

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during

frequencies

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drive

startup.

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area

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appear.

test

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controller

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test

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continuously

checks

memory

no

video

repeats

the

following:

above

memory

the

power-up

the 1 mega-

exists

in

this

tests

Operation

This

chapter

This

information

provides

will

Troubleshooting

information

assist

in

diagnosing

on

troubleshooting

to

the

major

Chapter

the

computer.

assembly

3

level.

A\

Static

Troubleshooting
Procedure

Precautions

Warning:

source

To
lowing

To
time,

before

prevent

precautions:

e

Do

not

aging

e

Equalize

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yourself

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e

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it

down

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follow

1.

Run
puter

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settings
require
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proceed

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prevent

servicing.

component

remove

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static

up

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the

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let

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troubleshoot

this

procedure:

the

ECU

system

such

as

enabled.

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hardware

for

reference

to

the

shock,

disconnect

damage

any

static-sensitive

is

ready

to

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electricity

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touching

device

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go

of

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any

disk

drives,

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recommended

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configuration

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with

it

until

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to

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later.

step.

the

packaging.

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printers,

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computer

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work

the

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from

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computer

cards.

default

information).

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the

surface

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protective

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in

the

configuration

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and

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settings

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to

computer

from

from

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work

surface,

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one

packaging,

installed

the

Chapter 5 of

in

shortest

will

verify

I/0

devices

you

of

cards

This

information

is

properly

the

AC

use

the

fol-

protective

the

hand

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2.

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cover

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bent

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circuit

cards

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Chapter 4 of

or

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discoloration

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the

this

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socket

next

manual)

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boards,

connector

connectors.

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check

or

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bent

pins

the

3.

The

troubleshooting

_

vicing

this

charts

later

computer.

in

this

chapter.

charts

offer a structured

Refer

to

the

section

approach

on

troubleshooting

to

ser-

Power-Up

Status

LEDs

At

power-up,
internal
problem
screen.

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chapter.

The

following

puter:

1.

The

2.

The

remains

3.

Disk

4.

The

5.

Internal

6.

Computer

There

are

group

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nector
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ated

plugs

LEDs

signals.

the

circuits

during

and
this

error

Some

initialization

events

power

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drives

initialize

prompt

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power-up

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sets

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onto

turn

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process,

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status

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on

self-tests

to

of

status

the

system

the

system

Figure

begins

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If

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error

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actions

occur

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produce a visual

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the

monitor

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autoboot.

LEDs

in

the

board

board.

3-1

As

illustrates

initialization

computer

message

in

power

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light,

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appears

detail

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applied

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the

heads

process

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computer.

where

the

computer

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seek).

power

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a

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Figure

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/

As

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puter

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puter

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3-1.

Power

Status

set

of

LEDs,

board.

3-2.

Diagnostic

Figure

PLED

©

powers

each

goes

out.

passed a portion

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prompt

lit.

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to

to

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the

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up,

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the

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diagnostic

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in

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troubleshooting

on

and

then,

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If

the

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LEDs

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one

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com-

lit.

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charts

a

Troubleshooting

3-3

N’

Troubleshooting

Charts

Notice:
is
damage

The

Start
chart
other,
or
sequence

Each
puter.
block
charts.

Dashed
formed
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solution

Before

disconnected.

to

following

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the

provides

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recommend

through

block

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lines

to

solve

are listed

last.

removing

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circuit

card

charts
General

immediate

detailed

further

until

in

the

chart

blocks

found

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with

circuit

cards

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remove

or

computer

are

organized

System

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tests

the

problem

represents a step
contain a smaller
to

the

notes

in

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charts

problem.

the

most

circuit

(or

to

Troubleshooting

recommendations

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charts

to

isolate

is

that

indicate a sequence

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likely

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cards

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located

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problem.

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in

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steps

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computer,

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or

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block.

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in

the

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power

Figure

directs

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of

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least

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power

applied

efforts.

3-3.

you

assembly

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to

indicated.

likely

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to

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be

per-

as

Troubleshooting

Figure

3-3.

Apply

the

and

General

power

to

computer

monitor.

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Troubleshooting

Is

the

LED

the

power

on/off | ves

switch

[it?

No

Refer

to

the

Main

Power

Troubleshooting Troubleshooting

Chart.

on

Chart

Are

system

power

Refer

all

of

board

LEDs

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to

Main

Power

Chart.

the

the

lit?

Yes

Do

all

diagnostic

LEDs

on

the

system

board

light?

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to

the

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System

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Yes

Do

the

LEDs

system

go

out

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message

on

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chapter

error

explanation.

diagnostic

on

the

board

one

by

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appear | No

screen?

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to

this
for

message

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On

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to

the

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System

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Chart. Chart.

on

Does a blinking

cursor

appear

the

monitor?

No

Refer

to

the

Video

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Yes

Does

the

computer

autoboot?

No

Is

the

computer

configured

aqutoboot?

Refer

Troubleshooting

to

Yes

to

the

Drive

Chart. Chart.

No

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monitor

appear?

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an

message

appear?

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to

chapter

error

message

explanation.

the

prompt

No

Yes

error

this
for

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Yes

No

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Can

you

boot

the

computer

manually?

Refer

to

the

Dead

System

Troubleshooting

)

Troubleshooting

Figure

3-4.

General

System

Troubleshooting

Chart

(continued)

©

Refer

to

the

Drive

Troubleshooting

Chart.

Do

any

error

messages

?

PP

Yes

Refer

to

this

chapter

error

for

message

explanation.

No

Does a DOS

prompt

appear

on

screen?

No

Refer

Disk—Based

Diagnostics

further

tests.

System

to

OK.

for

Yes

Enter

|using

date

the

the

MS—-DOS

command.

date

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any

error

messages

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Yes

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to

chapter

error

message

explanation.

this

for

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Enter

using

time

the

the

MS—-DOS

command.

time

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Troubleshooting

3-6

Figure

Yes

3-5.

Dead

Do

all

Ds

system

Replace

system

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LED

Refer

Memory

Troubleshooting

Chart.

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diagnostic

on

the

board

light?

No

the

board.

the

ROM

go

out?

No

to

the

Troubleshooting

Do

any

Yes

messages

Does

Yes | control

message

error

appear | No

on

the

monitor?

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Refer

to

chapter

explanation

error

system

this

for

messages.

the

"System

processor | No

failure!”

error

appear?

Yes No

Replace

the

board.

an
of

Chart

Does a blinking

cursor

appear

on

the

monitor?

Refer

to

the

Video

Troubleshooting

Chart.

Does

the

RAM

LED

go

out?

Refer

to

the

Memory

Troubleshooting

Chart.

Yes

Does a keyboard

Yes

Does

the

CPU

LED

go

out?

No

Replace

the

system

board.

error

appear?

Yes

Refer

to

the

Keyboard

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Chart.-

Yes

No

Troubleshooting

Figure

.

@——P

3-6.

Dead

Does

LED

Do

any

messages

Refer

Memory

Troubleshooting

Chart.

Does

LED

System

the

INT

go

out?

No

error

appear? | Yes

No

to

the

the

DSK

go

out?

No

Troubleshooting

Yes

@

Refer

to

LED

this

for

messages.

the

RDY

go

out?

No

Yes

chapter

explanation

error

Does

an

of

Chart

(continued)

Yes

Is

LED

the

ENP

out?

No

Yes | system.

Operational

the

Disk—Based

Diagnostics

further

Refer

help.

to

for

Refer

to

the

Drive

Troubleshooting

Chart.

Is

the

computer

configured

autoboot?

Yes

Is

the

operating

system

installed. | No

Yes

Refer

to

the

Drive

Troubleshooting

Chart.

to

No

Configure

computer

aqutoboot

the

unit

Install

operating

the

to

or

boot

manually.

the

system.

Replace

system

the

board.

Troubleshooting

3-8

Figure

NUM

LED

Is

the

connected

properly?

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the

in

AT

Replace

keyboard.

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system

3-7.

Is

the

LOCK

Ilit?

keyboard

keyboard

mode?

T

|
1

1

Keyboard

No

Yes

Yes

the

the

board.

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Yes

No

No

Reconnect

the

Set

switch

correct

keyboard.

the

keyboard

to

the

mode.

Chart

Do

any

messages

appear?

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chapter

error

explanation.

error

Yes

to

this
for

message

No

Replace

keyboard.

Replace

system

the

T

1
1

1

the

board.

Troubleshooting

3-9

Figure

Are

device

computer

"

Reconfigure

device
the

3-8.

Parallel/Serial

the

1/0

and

the

configure:

properly?

No

and/or

computer.

I,__.

the

1

Yes

Are

properly

connected?

Reconnect

Port

Troubleshooting

cables

No No

cables.

Yes

Does

connected

the

Replace

peripheral

Replace

peripheral

Replace

system

the

COM1

work?

Y

Chart

device

to

port

the

cable.

1

the

device.

T

|
|

the

board.

Yes

NOTES

1.

Run

the
configuration,
the

peripheral

ECU

program

and

to

device

to

verify
verify
documentation

proper

that

the

computer

device(s)

to

verify

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is

enabled.

hardware

1/0

Check

configuration.

device(s)

Troubleshooting

3-10

Figure

O

3-9.

Parallel/Serial

Does

the

connected

COM2

peripheral

device

to

serial

port

work?

No

Replace

the

peripheral

cable.

T T

1 |
1 1

1

Replace

the

device.

T
|
|

1

Replace

the

system

board.

NOTES

1.

Disk—based

connector

(438-73)

the

diagnostics

and

Port

Troubleshooting

Does

the

LPT

Replace

Replace

Replace

system

require

parallel

port

device

to

work?

No

cable.

1

the

device.

the

board.

the

the

the
loopback

connected

peripheral

peripheral

tests

the

serial

Chart

Serial

ports

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Diagnostics

loopback

connector

(continued)

and

paraliel

operational.

Disk—Based

tesrs_

1

(438-64)

Troubleshooting

Figure

Does

message

Refer

chapter

error

explanation.

3-10.

an

error

appear? | No

Yes

to

this
for

message

Drive

Troubleshooting

Run

disk—read

Run

and

memory

Refer

Troubleshooting

Chart

ROM-based

test.

Pass?

Yes

ROM-—-based
disk—based | Yes

tests.

Pass?

No

to

the

Memory

Chart.

Replace

controller.

Replace

backplane

Replace

system

No

the

T

|

1

1

1

drive

the

card.

the

board.

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drive

>

controller

configured

~

Reconfigure

the

and

disk

drive

properly?

No

hardware.

disk

the

card

the

Yes

Are

the

and

controller

configured

and
in

the

Run

and

enable

disk

drive

correctly

enabled

ECU?

No

the

ECU

drive.

=)

the

Troubleshooting

3-12

Figure

@-—)

3-11.

cables

Reconnect

drive

Drive

Are

drive

connected | ves

properly?

No

the

cables.

Troubleshooting

damaged

Chart (continued)

Are

any

drive

cables

damaged?

Yes

Replace

any

cables.

No

Replace

disk

Replace

disk
controller.

Replace

backplane

Replace

power

Replace

system

the

drive.

T

|
|

1

the

drive

1

1
1

Il

the

card.

T

|
|
1

the

supply.

the

board.

Troubleshooting

3-13

Figure

Yes

3-12.

Is

configured

Configure
video

use

Adjust

and

controls

positions.
display

Replace

Is

controller

TIGA

Video

Troubleshooting

the

video

card

properly?

No No

card

with

monitor.

contrast

brightness

to

appear?

No

monitor.

1

|
| 1

1

the

video

card?

Yes

[_

1

the

for

the

Yes
center supply
Does

the

a

Is

the

interface

connected

properly?

Reconnect
video

interface

cable.

Video

is

complete.

No

Chart

video

cable

the

check

a

Yes

Is

monitor

turned

Turn

monitor.

the

on

No

on?

the

Yes

[3]

Does

monitor

LED

|s

power

attached

supply

the

Connect

cable

monitor.

Replace
power

Replace

monitor.

the
power

light?

No

cable

to

and

monitor?

No

y

power

to

the

and

:

|

1

the

cable.

T

[

Il

the

AC | Yes

AC

the

2

2

Yes

Replace

monitor.

=@

the

NOTES

1.

Refer

configuration

2.

On

some

3.

If a TIGA

to

Chapter 5 in

information.
monitors
video

card

the

this

is

Yes

manual

Also,

power

cable

installed,

or

run the

cannot

run

c

manufacturer's

ECU

to

verify

be

removed.

the

TIGA

video

documentation

proper configuration.

Replace

diagnostics.

for

monitor

hardware

instead.

Troubleshooting

3-14

Figure

No

‘——)

Yes

3-13.

Replace

video

Is

the

in

Replace

TIGA

controller

Video

Troubleshooting

the

card.

==

problem

the

VGA

mode?

No

the

video

card.

Yes | VGA

Replace

backplane

card.

Replace

daughterboard

on

the

video

Replace

backplane

Chart (continued)

the

the

TIGA

card.

the

card.

F—---

=

Replace

system

Replace

TIGA

controller.

Replace

system

the

board.

the

video

the

board.

Replace

backplane

-

the

card.

-

Replace

system

the

board.

Troubleshooting

3-15

Figure

Is

switch

Is

plugged

Connect

proper

3-14.

the

LED

y

computer

the

proper

source?

AC

on/off

No

into

AC

No

it

source.

Power

lit?

to

Troubleshooting

AC

the

Is

system

the

on

Yes

Yes

board

Replace
power

Replace

power

Replace

on/off

assembly

wire

harness.

Replace

system

lit?

No

cord.

T

|
[

1

supply.

:
|

1

switch

T

|
|

board.

LED

the

the

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and

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the

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on

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LED

Remove

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on

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light?

Disconnect

drive

connectors.

the

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Replace

power

DC

system

lit?

No

+5V

lit?

No

all

LED

No

power

LED

No

supply.

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cards

the

all

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light?

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Yes

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cards

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defective

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|

power

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1

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one

by

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one

goes

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card.

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until

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+5V

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NOTES
1%

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information

not

remove

on

or

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install

capacity

cards

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of

this

power

computer.

applied.

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backplane

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system

card.

Replace

system

Refer

to

the

card.

the

memory

L

the

board.

Chapter 4 of

this

manual

for

Troubleshooting

3-16

Figure

@—!

3-15.

Is

supply

Replace

power

Is

Remove

using

+12V

Disconnect

drive

connectors.

the

Replace

power

Power

the

power

fan

running?

No

supply.

the

+12Vv

LED

lit?

No

any

+12VDC.

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No

power

+12V
light?

No

the

supply.

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Yes

check

the

card

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light?

1

all

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LED

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Replace

|

one

+12V

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defective

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by

one
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by

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cables

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power

complete.

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drive

one

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power

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backplane

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LED

LED

}
[

1

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lit?

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light?

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the

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oot

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Replace

not

the

card.

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|
|

1

the

board.

remove

or

install

cards

with

power

applied.

Replace

system

the

board.

Troubleshooting

3-17

Figure

Does

message

on

Refer

error

3-16.

an

error

appear

the

screen?

Yes

to

this

chapter

for

message

explanation.

Memory

No

Troubleshooting

Reseat

SIMMs
memory

and

memory

cards.

ROM—based

disk—based

tests.

Pass?

Yes

the

board.

on

No

system

card

expansion

Run

and

memory

Replace

system

Chart

Replace

indicated

memory

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system

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expansion

backplane

Replace

system

defect—

ive

SIMMs

tests.

T

|
[

memory

card.

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|
I
1

defective

memory

cards.

Replace

T

I
|

board.

by

the

any

card.

the

Troubleshiooting

3-18

Disk-Based

Diagnostics

Power-Up

Messages

and

Error

An

optional

puter.

The

disk-based

detailed

information.

If a
diagnostics

disk.

If
it
sages

the

DISK

This
connected,

ware

Corrective

¢

series

TIGA

video

the

computer

displays

are

arranged

probable

ERROR:

message

failure

steps:

Inspect

package

a

message

if

the

disk-based

diagnostics

of

tests.

controller

is

available

encounters

on

in

alphabetical

cause(s),

occurs

the

occurs.

disk

and

Bad

disk

if

a

controller

drive

diagnostics

provide

Refer

to

Chapter

card

is

installed

on

~

any

problems

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monitor.

order,

suggested

controller!

disk

drive

cable

card

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power

and

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1

of

in

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TIGA

during

The

following

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cables

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the

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self-tests

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with

the

to

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properly,

for

the

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and

for

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a

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e

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e

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to

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properly

card.

Read

Test”

fault

(it

identify

connected.

to

determine

may

also

the

problem).

help

whether

to

run

Replace

the

drive

the

disk-b'fls.ed

the

failing

.

Troubleshooting

DISK

ERROR:

This

error

the

disk,

problem

CRC

error!

indicates a faulty

etc.), a hardware

could

also

be

the

disk

(unformatted

failure,

drive

controller

or a loose

card.

disk,

or

faulty

corrupted

drive

cable.

3-19

data

The

on

Corrective

Try

another
readable
sectors

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more

disk

drive.

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Inspect

Replace

DISK

ERROR:

The

computer

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If

this

message

error”.

steps:

disk.

If

files to a good

are

reported,

than

one

disk

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all

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detected

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occurs

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data.

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any

If

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other

drive.

original.

CRC

Use

disk-based

diagnostics

to

test

the

drive.

Troubleshooting

3-20

DISK

The
the

disk

ERROR:

computer

is

not

Disk

not

attempted
usable.

bootable!

to

boot

an

unformated

or

non-system

disk,

or

Corrective

Make

certain

in

the

drive.

Try

using

When
specified.

For a hard
necessary,
Reformat
replace

DISK

ERROR:

The

problem

Corrective

Replace

DISK

ERROR:

steps:

that

the

If

not,

reformat

another

copy

using a hard

If

not,

specify

disk

drive,

back

up

the

drive

the

hard

disk

DMA

overrun!

is

caused

by a DMA

steps:

the

system

Drive

floppy

of

disk

the

first

the

drive

and

install

drive.

board.

not

ready!

disk

is

the

disk

the

applications

drive

make

correct

try

to

reinstall

and

use

the

operating

hardware

bootable

and

and

install

the

software

sure a bootable

partition

PREP

and

the

operating

to

system.

failure.

properly

operating

or

data

engaged

system.

disk.

partition

reboot.

system.

reinitialize

the

As a last

is

If

disk.

resort,

There

is

no

drive

hardware

puter

attempts

Corrective

Verify

Make

certain

closed
drive

and

program

If

this

message

the

computer.

isolate

Replace

disk

in

failure

to

steps:

that

the

and

latched.

retry

to

find

the

problem.

the

drive.

the

floppy

access a non-existent

correct

the

disk

drive,

occurred.

drive

was

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fully

the

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disk

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inserted

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the

boot

command.

the

problem.

occurs

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when

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persist

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run

disk

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in

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bootable

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the

hard

disk

the

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in

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the

disk-based

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try

diagnostics

or

a

the

com-

the

door

is

floppy

disk

diagnostics

to

reboot

to

Troubleshooting

3-21

ERROR:

DISK

message

This

properly

been

Copy

bad

If

the

If

Reformat

-

Run

—

Replace

-

FORMAT

ERROR:

floppy

steps:

any

sectors

problem

files

Corrective

e

e

Note:
readable

DISK

The

Invalid

if

occurs

formatted.

readable

are

occurs

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and

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to

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damaged

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hard

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to

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disk.

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or

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a

discard

hard

a

the

drive.

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read!

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mark!

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and

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disk.

the

three

disk,

disk.

hard

data

all

proceeding.

properly

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damaged

is

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options

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on

formatted.

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or

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available:

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Copy

drive.

not

disk.

any

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DISK
hard

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figuration

steps:

any

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sectors

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ERROR:

drive!

configuration

ECU

information.

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the

Use

e

boot

the

readable

are

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steps:

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drive

files

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to

(refer

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good

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to

discard

the

configuration

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specify

to

the

the

owner’s

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manual

for

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hard

ECU

faulty

the

‘

from

boot

to

drive

disk

drive

disk

information).

disk.

con-

type

If

for

Troubleshooting

3-22

DISK

:;1;(

computer

ERROR:

Sector

attempted

not

to

access

found!

an

unformatted

or

damaged

floppy

Corrective

¢

Copy

If

bad

DISK

ERROR:

The

computer

disk.

Corrective

®

Copy

any

sectors

Divide

The
message
again

by

power-up

may

quickly.

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®

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another
software
message
to

be

in

steps:

any

readable

sectors

are

Seek

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steps:

readable

are

reported,

zero!

self-tests

also

appear

steps:

copy

manufacturer

occurs

the

during

software.

files

to

reported,

failure!

to

access

files

to

discard

failed

if

the

of

the

software,

or

the

a

good

discard

an

another

the

disk.

or

a

software

computer

dealer

to

power-up

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disk.

unformatted

disk

and

format

failure

is

turned

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report

the

sequence,

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or

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the

occured.

off,

then

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problem.

the

problem

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floppy

disk.

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back

on

contact

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disk.

bad

the

this

¢

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the

message

computer

off,

reappears,

wait

replace

15

the

seconds,

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turn

board.

it

back

on

again.

If

the

Troubleshooting

Error

message

This

bad

a

reading

logical

first

partition

indicates

a

sector.

boot

problem

code

the

in

hard

disk

media

drive

3-23

such

as

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Check

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e

Back

up

Remove

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e

Reinstall

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As a last

partitions

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message

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to

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the

the

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the

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the

resort,
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disk

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prep

operating

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be

displayed

The

is

to

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boot

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press

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the

entire

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first

message

make

process.

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using

the

on

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the

and

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the

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to

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follow

program.

ECU

the

message
sector).

new

partition.

disk

drive

continue

of

the

indicates

aware

what

that

the

instructions

generated

is

and

screen

error

errors

and

reinstall

following

halted

exist

to

resolve

the

Troubleshooting

3-24

Errors
continue

The

Corrective

e

ERROR:

This
also

Corrective

e

e

ERROR:

found:

computer

Enter

Bad

message

could

Use

the

ration

Refer

to

the

real-time

Bad

Please

was

powered

steps:

the

required

configuration

normally

problem

indicate

steps:

ECU

information.

a

configuration

“Real-Time

clock

SIMM

unlock

up

with

password.

appears

Clock

IC.

Module

after

in

program

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keyboard

the

keyboard

information

real-time

chip.

RTC

the

to

verify

Replacement”

on

Expansion

then

press

locked

found

clock

in

in

replacement.

or

re-enter

Chapter 4 and

Board!

<Esc>

(by

software).

CMOS!

the

configu-

to

It

replace

This

message

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Check
properly

e

Swap

the

the

module

module

e

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the

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indicates a problem

steps:

memory

seated.

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installed

defective.

was

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not

installed

diagnostics

identify a faulty

on

with

on

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memory

to

be

sure

problem

problem

extended

the

SIMM

card.

they

are

disappears,

moves,

memory.

or

a

If

the

.

Troubleshooting

3-25

ERROR:

faulty

A

this

Corrective

e

e

e

ERROR:

The
agree
For
memory
memory.

SIMM

Corrective

Bad

or

message

error

Reseat

Replace

the

Run

amount

with

example

but

The

or

expansion

SIMM

improperly

to

steps:

indicated

the

indicated

the

disk-based

memory

Base

base

of

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power-up

at

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steps:

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installed

generated.

be

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diagnostics

size

memory

base

of

may

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also

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Main

on

on

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UXXX.

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for

error!

specified

memory

been

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system

the

extensive

more

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xxxK

SETUP:

in

identified
configured

sees

a

Chip:

board

memory

ACTUAL:

program
during

640K

for

of

512K

improperly

or

Uxxx!

cause

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tests.

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not

does

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base

of

base

installed

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the

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puter
identify a faulty
failure,
chips
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clusive,

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the

to

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for

proper

diagnostics

replace

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the

correct

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for

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Monitor

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identify a memory

replace

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identify a CMOS

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tests.
again.

the

tests

size.

If

the

If

the

the

indicated

problem

are

com-

tests

RAM

on

incon-

Troubleshooting

3-26

ERROR:

Reconfiguring

The
with
run
base
of

a

memory

Corrective

®

¢

®

Base

base

memory

the

actual

the

ECU

configuration

memory

missing

The
temporarily
user
program
message

Run
cating

An

if
memory
an
message
or
on

or

the

on

steps:

computer

to

configure

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will

the

ECU

at

least

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the

user

on

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use

the

the

system

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base

specified.

defective

system

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the

appear.

ECU

size

size

specified

memory

This

expansion

board.

will

automatically

the

run

to

program
512K

of

memory

system

memory

to

reconfigure

board

to a minimum

too

base

memory

during

size

program,

message

actual

computer

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appear

to

to

properly

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card

may

the

computer

board

and

card.

If

Install

or

the

small!

installed

SETUP:

as

configuration

in

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must

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correct

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memory

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the

configuration

whenever

reconfigure

as

base

memory.

cause

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with

the

remainder

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card

replace

the

computer

of

512K.

xoxxK

512K

the

computer.

be

at

be

generated

card

or

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configuration

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the

the

message

less

than

of

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increase

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system

If

after

diagnostics

and

replace

the

system

board

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it.

board

memory

the

above

program

as a last

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steps

to

locate

resort.

also

the

the

generate

problem

defective

this

persists,

run

system

error

the

board

Troubleshooting

ERROR:

disk

The

closed,

not

Cannot

not

is

or

reset

properly

hardware

a

drive!

installed

failure

in
has

drive,

the

occured.

the

drive

3-27

door/latch

is

Corrective

Check

e

sure

Make

e

Replace

e

ERROR:

The

Corrective

e

ERROR:

Either

Corrective

e

CMOS

internal

Replace

CPU

the

Replace

steps:

floppy

the

the

drive

the

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steps:

real-time

the

failure!

or

CPU

steps:

the

to

disk

door

drive

the

or

Memory

memory

supporting

system

board

sure

be

fully

is

controller.

disk

Failure!

(real-time

chip

clock

circuitry

in

the

inserted

is

it

closed.

clock)

detailed

as

suffered

computer.

correctly

the

failed

Chapter

in

hardware

a

the

in

power-up

4.

failure.

drive.

test.

ERROR:

An
error
problem.
1/0

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®

e

EISA

master

message

Slot 0 would

card.

Replace

If

slot 0 is

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card

gives

steps:

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expansion

indicated,

Bus

timeout.

on

the

expansion

the

slot

number

indicate a CPU

card

replace

in

the

of

the

system

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bus

held

the

master

problem

slot

indicated

board.

Bus

Master

the

bus

too

causing

or a problem

by

the

the

error

is

slot:

long.

with

message.

z!

The

the

Troubleshooting

3-28

ERROR:

ACTUAL:

The

amount

not

agree

power-up.
problem.

Corrective

e

Use

the

¢

Inspect

®

Use

the

the

computer

the

tests

memory

ERROR:

This
is

taking

system

Fail-safe

indicates

too

board.

Extended

memory

yyyyyK

of

extended

with

the

amount

A

faulty

or

improperly

steps:

ECU

program

all

SIMMs

for

disk-based

will

not

identify

card,

a

replace

timer

either a software

long)

or

possibly a faulty

size

memory

of

extended

specified

installed

to

verify

proper

diagnostics

faulty

the

installation.

boot,

replace

SIMM,

indicated

timeout!

program

applications

error!

memory

the

memory

the

replace

memory

fail-safe

SETUP:

in

the

identified

SIMM

size

to

test

first

SIMM

it.

If

module,

problem

timer

xoooxK

ECU

program

can

also

entry.

extended

and

the

problem

(a

software

chip

during

create

memory.

try

or

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on

the

does

this

again.

is

on

card.

task

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a

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customer
problem.

e

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the

problem

is

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it

back

steps:

copy

contact

faulty.

on.

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occurs

the

message

of

the

the

software

during

Turn

software

manufacturer

the

the

computer

reappears

applications

power-up

replace

off,

wait

sequence,

the

program

or

dealer

15

seconds, and

system

or

to

report

the

timer

board.

have

the
the

chip
turn

Troubleshooting

3-29

ERROR:

Some

cessor

occurs

Corrective

e

Invalid

internal

state.

when

steps:

Check

process

Otherwise,

an

to

be

command.

e

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another

software

e

Replace

ERROR:

This

error

ally

the

manufacturer

the

IOCHK

indicates a problem

problem

sibly a backplane

Corrective

steps:

command!

(usually

illegal

command

sure

the

copy

of

system

from

is

caused

problem.

math

hardware

a

command

the

software

or

dealer

board.

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with a card

by a memory

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entered.

syntax

or

to

Board

created

occured.

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have

report

in

the

parity

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correct

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customer

the

problem.

in

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on

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illegal

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and

re-enter

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indicated.

the

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card

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pos-

e

e

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Replace

Replace

the

expansion

the

backplane

the

system

card

card.

board.

in

the

indicated

slot.

Troubleshooting

3-30

ERROR:

The
error
certain

Corrective

e

e

e

ERROR:

The

Corrective

e

Keyboard

keyboard

may

peripheral

Verify
manual
manual

Replace

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this

peripheral

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power-up

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is

not

also

be

steps:

that

the

for

proper

for

keyboard

the

keyboard.

message

devices

tests

steps:

all

SIMMs

not

responding

properly

generated

devices

keyboard

occurs

parity

detected a memory

for

connected,

if

the

(such

as a printer).

is

properly

connection

configuration

frequently,

are

powered

failure!

proper

installation.

or

or

computer

connected

procedure

information).

make

up

at

the

parity

not

connected!

the

cable

is

powered

and

sure

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same

failure.

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damaged.

up

after

(refer

to

the

Chapter 5 of

the

computer

time.

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owner’s

this

and

e

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the
computer
and

try

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rupted
normally
powered

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e

e

No

indicates

in

the

appears

up

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the

data.

If

the

Replace

disk-based

does

not

again.

steps:

problem

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the

card

the

configuration

that

the

8K x 8

for

ECU

the

EEPROM

when a new

the

first

configuration

persists

system

diagnostics

boot,

replace

tests

identify a faulty

memory

EISA

time.

board

is

in

configuration

on

system

program

it

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and

program
the

on.

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the

system

board

indicate a faulty

reconfigure

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data

board.

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check

on

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memory!

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the

lost

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memory.

system

replace

system

lost
error

and

configuration

x 8

it

or

board.

or

cor-

message

it

is

EEPROM.

If
board

the

the

Troubleshooting

3-31

ERROR:

This
power
dropped
the
ware
guage
this

Corrective

e

e

e

ERROR:

The

It

could

Non-maskable

message

supply

below

AC

source

program

commands

error.

steps:

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the

Ifthe

ACsupply

until

the

If a

software

software

Non-volatile

EISA

configuration

be

caused

supply

by a software

warns

of

an

has

failed

(blown

acceptable

caused

issues

the

an

undefined

entered

computer

is

off.

at

fault,

problem

problem

manufacturer

8K x 8

by a faulty

error.

interrupt!

impending

fuse

operating

problem.

from

the

If

the

power

do

not

is

corrected.

is

suspected,

for

assistance.

memory

EEPROM

non-volatile

power

or

levels

The

interrupt.

Monitor

failure.

circuit

(brownout),

message

Certain

program

supply

apply

power

have

checksum

memory

memory

Either

breaker),

also

appears

machine

can

is

at

fault,

to

the

computer

the

customer

failure!

has

been

chip

the

AC

the

supply

or a glitch

if a soft-

lan-

also

cause

replace

it.

system

contact

corrupted.

or

in

rare

cases

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in

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replaced.

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problem

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assistance.

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customer

to

reconfigure

occurs

8k x 8

occurs

only

contact

during

EEPROM

while

the

the

non-volatile

the

power-up

chip

and

the

running a certain

software

manufacturer

memory.

tests,

the

system

software

cause

board

or

may

be

should

be

program,

dealer

for

Troubleshooting

3-32

ERROR:

This
mean

Corrective

o

e

ERROR:

The

appear

Corrective

e

e

Please

message

the

back-up

If

the

battery

ECU

configuration

mation

Refer

to

battery)

ROM

monitor

if

the

Turn

the

If

the

message

replace

is

normal

battery

steps:

(réal-u'me

for

the

computer.

Chapter 4 and

and

run

the

checksum

ROM

failed

computer

steps:

computer

reappears,

the

after

replacing

is

weak

clock

program

replace

ECU

configuration

failure!

the

power-up

is

turned

off,

wait

replace

back-up

the

and

should

chip)

to

enter

the

real-time

self

off,

then

15

seconds,

the

battery!

back-up

be

was

recently

the

proper

program.

test.

back

on

and

system

battery.

replaced.

replaced,

configuration

clock

chip

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message

very

quickly.

turn

it

back

board.

It

can

also

use

infor-

(contains

may

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on.

the

the

ERROR:
volatile

EISA
product.
what
be

generated.
ured
ferent

in

that

a

different

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e

e

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memory!

expansion

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has

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system

EISA

slot

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sure

that

is

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problem

z,

ID

xxxxxxx:

cards

are

the

actual

manufacturer-assigned

configured

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error

to

accept

card

in

that

slot.

with a certain

ID.

steps:

the

EISA

card

actually

located

remains,

replace

Board

manufactured

in

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ECU

message

an

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that

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system

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instead

was

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the

board

configured

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with

an

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to

to

find

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data,

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with

this

error

user

config-

but

puts a dif-

EISA

card

there

slot

is

the

will

with

one

Troubleshooting

3-33

ERROR:

EISA
error

Slot

cards
will

be

Corrective

e

If

this

should

ERROR:

The
to

expect

appear

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configuration

an

to

the

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information.

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sure

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have a set

generated.

steps:

error

occurs

be

replaced.

z,

ID

data

EISA

card

computer

steps:

ECU

program

the

EISA

occurs

xxoooxxx

period

of

frequently

xxooxx

in

the

non-volatile

in

the

indicated

to

be

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to

reconfigure

expansion

again,

replace

Board

time

to

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card

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the

not

ready!

respond

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when

card

board!

memory

slot,

but

the

the

computer

installed

EISA

in

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addressed

in

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tells

the

card

does

with

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slot.

card.

or

this

indicated

computer

not

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correct

slot

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The

slot.

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computer

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tered!

The

slot

indicated

EISA

card

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e

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an

steps:

z,

is

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steps:

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xxooxxx

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card

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system

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configured

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the

system

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configured

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using

the

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to

using

the

is

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empty!

to

indicate

indicated

ECU

no

card

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program.

found

board

contain a non-EISA

ECU

program.

in

the

ID

encoun-

card

indicated

in

that

slot.

but

an

Troubleshooting

3-34

ERROR:

This
sibly
applications

Corrective

e

error

the

Try

Software

message

bus

software

steps:

another

software

o

If

this

message
indicate a timer
seconds,
again,

replace

ERROR:

The

message

System

system

may

control

quickly.

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steps:

generated

is

generated

master

timeout,

program.

copy

of

the

manufacturer

is

generated

chip

then

turn

the

the

system

control

processor

also

appear

by

and

program

or

dealer

during

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computer

board.

processor

failed

if

the

computer

non-maskable

the

fail-safe

is

usually

to

Turn

or

have

report

the

the

back

due

this

power-up

computer

on.

failure!

the

power-up

is

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interrupt!

timer

timeout,

to a problem

the

customer
problem.

sequence

off,

If

the

message

self-test.

off,

then

or

in

contact

wait

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on

again

pos-

an

the

it

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15

appears

e

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the

the

message

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This

again

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interrupt

message

quickly.

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the

the

message

computer

reappears,

interrupt

controller

may

steps:

computer

reappears,

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off,

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replace

or

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appear

off,

wait

replace

for

15

the

failure!

logic

if

the

computer

for

15

the

seconds,

system

failed

board.

the

is

seconds,

system

board.

then

turn

power-up

turned

and

off,

turn

it

back

on.

self-test.

then

on

it

back

on.

If

If

Troubleshooting

3-35

ERROR:

An

Wild

unexpected

program.

Corrective

e

Turn

the

the

program.

e

If

the

message

program,

software

e

If

the

program

ERROR:

An

Wild

unexpected

program.

Corrective

hardware

error

or

steps:

computer

occurs

it

may

be

manufacturer

message

to

test

occurs

the

Interrupt!

error

steps:

memory

off,

wait

at

software

or

computer.

or

memory

interrupt!

failure

15

seconds,

the

same

related.

dealer

and

randomly,

Replace

failure

occurred

and

place

during

Have

the

report

use

the

any

faulty

occurred

while

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turn

it

back

the

operation

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problem.

disk-based

assemblies.

while

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a

on.

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of

a

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the

diagnostics

a

e

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the

the

program.

e

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the

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program,
software

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the

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to

test

Fatal

Error:

This

message

message.

The

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Refer

to

that

problem.

computer

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manufacturer

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the

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first

error

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at

the

software

or

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immediately

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message

15

seconds,

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report

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the

disk-based

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error

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the

operation

customer

contact

problem.

diagnostic

another

error

operation.

instructions

to

Rerun

of

a

the

tests

resolve

Troubleshooting

3-36

Non-system

The

computer

without

Corrective

e

¢

e

an

operating

steps:

Make

certain a valid

Install

the

tation

for

Reboot.

Non-maskable

This

message
power
has
message
rupt.
program

Corrective

supply

dropped

also

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can

steps:

below

disk

attempted

to

system.

drive

operating

system.

instructions.

interrupt

warns

has

of

an

failed

impending

(blown

acceptable

appears

machine

also

if a software

language

cause

this

boot

from a formatted

is

selected

Refer

to

received!

power

fuse

or

operating

program

commands

error.

for

the

the

operating

failure.

circuit

breaker),

levels

issues

entered

disk

or

partition

boot

operation.

system

Either

the

or

the

(brownout).

an

undefined

from

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documen-

AC

supply

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inter-

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the

the

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the

problem

e

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software

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bootable

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hard

disk

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no

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at

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computer

supply

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resolved.

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manufacturer

partitions

drive

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boot

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prompt,

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off.

at

fault,

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partition

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specified

partition

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selected

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when

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the

customer

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to

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at

fault,

to

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to

boot

the

from.

replace

computer

contact

from.

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command

it.

until

the

There

If

Troubleshooting

3-37

Not a bootable

computer

The

hard

the

Corrective

Install

o

e

Reboot.

Overflow!

message

This

Reboot

e

Try
software

off,

related.

turned

ware

invalid

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e

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drive

disk

steps:

operating

the

appears

then

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operation.

steps:

the

another

manufacturer

partition

is

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if

on

back

may

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computer

copy

of

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to

a

not

system

power-up

a

quickly.

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occur

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program

or

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on

self-test

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when

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the

power-up

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reappears,

off,

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replace

the

for

the

Troubleshooting

Chapter

4

Managing

Supply

Capacity

Power

This

chapter

various

Standard

Notice:
following

The
volts

The
tional
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than

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erly.

hardware

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amps.

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amps,

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removing

the

computer

and

aside.

shock,

the

cover:

N

a

=

—

set

the

video

disconnect

cover.

B.

the

computer

Unlock

from

&

the

computer

the

AC

cover.

power

Disassembly

and

Options

C.

Remove

the

To

re-install

rear

the

thumbscrews

of

the

the

cover,

computer.

reverse

from

the

D.

Slide

the

Make
on

process

the

cover

computer

sure

the

internal

of

the

above

toward

and

cover

cables

the

lift

it

up

does

or

connectors.

steps.

front

and

not

of

off.

bind

N

Circuit

Card

Removal/Installation

Notice:

To

1.

2.

3.

Use

remove a circuit

Remove

Remove
orientation

Refer

to

card

to

the

pull

it

free

static

precautions.

card:

the

cover

any

cables

so

they

Figure

4-1

computer

of

the

as

described

attached

can

be

properly

and

remove

chassis.

connector.

earlier.

to

the

the

Save

card.

Note

reattached

screw

that

the

screw.

their

location

later.

secures

Grasp

the

the

circuit

card

and

and

Figure

4.

Place

4-1.

the

Circuit

card

Card

in

Removal/Installation

protective

packaging.

Disassembly

and

Options

To

install a circuit

1.

Refer

to

Table

card

4-1

in

the

and

computer:

select

the

expansion

slot for

the

new

card.

N,/

Table

4-1.

CONNECTOR
P300

P301
P302
P303
P304

Before

2.
figure
mation
the

3.

Remove

Remove

4.
puter

Figure

Expansion

BUS
EISA

installing

computer.

the

the

on

computer.

the

and

chassis

4-2.

Blank

EISA
EISA
EISA
EISA

ECU.

cover

save

the

at

Panel

Slot

Assignments

CARD
Open

Open

Open

Video

IDE/Floppy

new

the

Refer

After

as

described

screw

the

slot

Removal

Card

card(s),

the

to

running

earlier.

and

location

Disk/SCSI

the

run

owner’s

ECU,

the

cover

blank

used.

be

to

Controller

program

ECU

manual

turn

plate

Refer

for

off

from

to

Card

to

further

unplug

and

the

Figure

recon-

infor-

com-

4-2.

N’

Disassembly

and

Options

5.

6

7.

to

Refer

card

the
card

with

to

Refer

cables.

Replace

Figure

pushing

by

the

screw

circuit

the

cover.

position

and

4-1

carefully
removed

documentation

card

the
until
in

step

new

slides

it

4.

and

over

card

into

attach

the

place.

peripheral

any

Seat

slot.

Secure

the

L

Backplane

Card

Removal/Installation

Notice:

To

remove

1.

Remove

2.

Remove
cedure

3.

Remove
chassis.

Use

static

the

the

any

outlined

the

Refer

precautions.

backplane

cover

as

circuit

cards

in

the

two

screws

to

Figure

card:

described

installed

previous

securing

4-3.

earlier.

in

the

section.

the

backplane

computer

card

using

to

the

the

pro-

Figure

4.

Unplug
board.

4-3.

\

\

Backplane

and

lift

the

Card

Removal

backplane

card

out

of

the

socket

on

the

system

5.

To

install a new

steps.

backplane

card,

reverse

the

Disassembly

process

in

the

and

above

Options

4-6

4167

Coprocessor

Installation

NOTICE:

To

install

1.

2.

3.

Figure

e

Use

an

Remove

If a disk

have

to
instructions
that

is

Use

Figure

4-4.

.

T

static

precautions.

optional

the

cover

drive

is

be

removed

later

installed

Numeric

4-4

in

to

4167

coprocessor:

as

described

installed

in

the

locate

Coprocessor

in
before
this

chapter

slot.

the

installing

earlier.

the

top

slot of

the

coprocessor.

for

removal

numeric

Installation

coprocessor

mp

the

computer,

of

the

v

Refer

type

of

socket.

it

may

to

drive

4.

5.

6.

7.

8.

Insert

the

Align

the

corner

1

notched.

Reinstall

Replace

The
when

is

of

corner

of

any

the

coprocessor

the

necessary.

IC

into

the

notched
the

chip

the

socket.

drive

cover.

is

computer

socket

as

shown

corner
is

of

the

coprocessor

also

marked

The

pin 1 corner

which

may

have

automatically

is

turned

on

with

made

and

in

Figure

an

index

of

been

removed

available

booted,

chip

the

so

’

4-4.

(the

notched

dot)

with

socket

is

also

earlier.

to

the

system

no

configuration

the pin

Disassembly

and

Options

OEM

ROM

Installation

Notice:

To

install

1.

Remove

2.

Locate

board.

Use

an

static

OEM

the

the

OEM

Refer

precautions.

ROM:

computer

to

Figure

ROM

cover

socket

4-5.

as

described

at

location

earlier.

U114

on

the

system

Figure

1

T

g

3.

Remove

4.

Carefully

with

S.

Replace

4-5.

pin

OEM

any

expansion

insert

one

the

cover.

ROM

Installation

the

IC

of

the

socket.

OEM

&\\\&

ROM

i\\\\‘\\\\\\\s

cards

into

the
Refer

or

that

socket

to

may

make

by

aligning

Figure

e

4-5.

access

pin

one

difficult.

of

the

IC

Disassembly

and

Options

System

Card

Memory

Removal/

Installation

Notice:

To

remove

1.

Remove

2.

Remove
chassis.

Use

the

static

precautions.

system

the

cover.

the

two

screws

Refer

to

Figure

memory

card:

securing

4-6.

the

system

memory

card

to

the

Figure

3.

Lift

4-6.

the

System

system

Memory

memory

Card

Removal/Installation

card

out

of

its

socket

on

the

system

board.

Disassembly

and

Options

4.

To

install a new

above

steps.

system

memory

card,

reverse

the

process

in

the

4-9

SIMM

Removal

Installation/

Note:

Before
reconfigure
on

the

ECU.

to

allow

64-bit

order.

For

example, a pair

4M

SIMMs.

Notice:

To

1.

2.

3.

Use

install

SIMMs

Remove

Locate
dure

outlined

Refer

to
proper
in

the

socket,

until

it

latches

Figure

4-7.

adding

the

computer.

For

maximum

wide

Turn

off

static

(Single

the

cover

the

system

earlier.

Figure

socket,

and

snaps

into

engage

SIMM

or

removing

Refer

memory,

to

the

owner’s

performance,

memory

and

operation.

of

1M

unplug

SIMMs

the

computer.

Pairs

may

precautions.

In-Line

as

memory

4-7

and

gently

pushing

Memory

described

card

install

pushing

the

earlier.

and

each

SIMM

it

down

module

place. A distinctive

the

SIMM.

Installation/Removal

run

the

manual

install

SIMMs

may

be

followed

Modules):

remove

it

by

until

it

into

the

click

will

ECU

program

for

in

be

installed

using

the

putting

is

all

the

upright

be

heard

to

information

similar

by a pair

in

pairs
any

of

proce-

it

in

the

way

down

position

as

the

o

4.

Reinstall
above

5.

Replace

6.

Perform

-

in
functioning

7.

Run
the
tion

the

system

steps.

the

cover.

the

ROM-based

Chapter 2 of

properly.

the

disk-based

new

memory.

for

testing

o

—

memory

this

manual

memory

Refer

instructions.

card

memory

to

diagnostic

to

the

by

reversing

tests

described

verify

that

tests

disk-based

-|r

r

the

process

in

“User’s

all

memory

to

thoroughly

diagnostics

r=ar

_JLoJLodiod

in

rearsy

the

Lodbodlodb_JL_JdL_J

rEarrsrsrsirmre

Tests”

banks

are

check

documenta-

=

Disassembly

and

Options

4-10

To

remove a SIMM:

Remove

1.

Remove

2.
above.

Remove

3.

screwdriver
outward

Gently

4.

Reinstall
memory

Replace

Perform
in
functioning

Run
the
packed

the

cover.

the

system

the

appropriate

to

until

the

tip

the

module

the

system

removal

the

cover.

the

ROM-based

Chapter 2 of

properly.

the

disk-based

new

memory

with

the

memory

SIMM(s)

push

the

latches

SIMM

releases.

and

lift

memory

instructions

memory

this

manual

memory

configuration.

disk-based

card

using

by

carefully

on

each

Refer

it

out.

card

by

reversing

above.

tests

described

to

verify

that

diagnostic

Refer

diagnostics

tests

to

for

the

procedure

outlined

using a flat-bladed

end

of

the

SIMM

socket

to

Figure

all

the

4-7.

the

system

in

“User’s

memory

to

banks

thoroughly

documentation

further instructions.

Tests”

are

check

Disassembly

and

Options

4-11

NS

Disk

Drive

Installation

Notice:
the
ECU

drive(s).

Use

Optional
cedure

1.

2.

Figure

Consult

ECU

configuration

program

Then

static

precautions.

drives

to

install

Remove

Refer
slot

on

4-8.

to

reconfigure

turn

are

optional

the

to

Figure

the

chassis.

Drive

the

owner’s

program

off

and

installed

cover

as

4-8

Support

manual

when

the

unplug

in

drives:

described

and

remove

Bracket

to

adding

computer

the

the

top

earlier.

the

Removal

reconfigure

or

removing

before

installing

computer.

drive

slot.

panel

covering

Use

the

computer

the

the

drives.

Run

the

new

following

disk

drive

'

using

the

disk

pro-

Disassembly

and

Options

4-12

3.

Reposition
chassis

the

with

panel

the

as

screws

shown

removed

in

Figure

in

the

previous

4-9

and

reattach

step.

it

to

the

Figure

4.

Proceed
being
pages.

4-9.

Drive

by

installed.

Support

following

These

Bracket

the

instructions

Installation

instructions

are

for

the

listed

particular

on

the

following

drive

type

Disassembly

and

Options

Optional
Floppy

3.5-Inch

Disk

Installation

Drive

computer

This

e

3.5-inch,

e

3.5-inch,

To

install

1.

Unpack

2.

Set

the
using
drive-select

(DS1
manufacturers
designation.

3.

Refer
level

supports

1.4M

high-density

720K

double-density

either

drive:

the

3.5-inch

configuration

the

document

designation

with

drives

may

Check

to

Figure

work

4-10

surface.

types

two

floppy

jumpers,

supplied

must

supplied

use

DSO

their

documentation.

and

place

3.5-inch

of

drive

drive.

disk

drive.

switches,

with

represent

by

Zenith

or

DS1

the

the

Data

as

disk

floppy

or

termination

drive.

In

the

second

Systems).

the

second

drive

disk

this

logical

logical

upside

drives:

resistors

computer

drive

Other

drive

drive

down

on

4-13

each

a

Figure

4-10.

Adapter

Bracket

Installation

?

$

@g‘/

SCREW
FLAT

WASHER

GROMMET

Disassembly

and

Options

4-14

4.

Turn

the

two

rubber

place.

Place

the

Line

up

holes

in

disk

grommets

adapter

the

screw

the

bottom

drive

bracket

holes

adapter

into

the

over

in

the

of

the

drive.

bracket

two

key

the

drive

bracket

upside

holes

as

with

down

and

and

slide

shown

in

the

corresponding

insert

them

Figure

the

into

4-10.

Optional
Floppy

5.25-Inch

Disk

Installation

Drive

Secure

e

e

e

7.

Proceed

This

computer

drives:

5.25-inch,

5.25-inch,

To

install

1.

Carefully

the

disk

Start

the

two

grommets,
not

tighten

Start the

the

Tighten

disk

drive.

all

to

“Mounting

two

supports

half-height

half-height

either

type:

unpack

drive

longest

and

rear

these

screws

four

the

to

the

screws

holes

screws

through

screws.

Disk

the

following

1.2M

360K

5.25-inch

adapter

of

at

Drives”

high-density

through

the

this

time.

the

types

bracket

the

bracket

front

holes

later

in

of

5.25-inch

drive

double-density

floppy

disk

as

follows:

two

flat

into

the

of

this

section.

drive.

drive.

washers,

disk

the

bracket

floppy

two

drive.

into

disk

Do

2.

Set

the
using
drive-select
(DS1
manufacturers
designation.

Proceed

configuration

the

document

designation

with

drives

supplied

may

Check

to

“Mounting

jumpers,

supplied

with

must

by

use

DSO

or

their

documentation.

Disk

Drives”

switches,

the

drive.

represent

Zenith

DS1

Data

as

later

or

termination

In

the

second

Systems).

the

second

in

this

this

computer

logical

Other

logical

section.

resistors

each

drive

drive

drive

Disassembly

and

Options

4-15

Optional
Backup

SCSI

Unit

Installation

Tape

computer

The

Interface)
switches,
the
sent

Systems).
second

1.

Figure

or

drive.

second

the

logical

Slide
ping

4-11.

In

insert

supports

magnetic

termination

computer

this

logical

drive

Other

drive

button

eject

the

from

SCSI

5.25-inch

a

backup

tape

resistors

drive-select

each

(DS1

drive

manufacturers

designation.

the

to

(refer

unit

the

Shipping

Unit

SCSI

unit.

using

with

may

Check

and

left

to

Insert

(Small

the

Set

document

the

drives

use

their

remove

Figure

Removal

Computer

configuration

supplied

by

DS1

or

cardboard

the

must

Zenith
as

designation

supplied
DSO

documentation.

4-11).

System

jumpers,

with

repre-

Data

the

ship-

2.

Proceed

to

“Mounting

Disk

Drives.”

Disassembly

and

Options

4-16

Replacing

3.5-inch

Drive

the

Hard

Standard

Disk

To

replace

:

1.

Remove

2.

Unplug

3.

Remove

12).

Figure

the

the

4-12.

factory

the

cover.

power

the

hard

Hard

Drive

installed

cable

disk

and

drive

Cover

3.5-inch

ribbon

front

Plate

hard

cable

cover

Removal

disk

from

plate

drive:

the

hard

(refer

to

disk

Figure

drive.

4-

4.

Remove

(refer

Figure

5.

Slide

the

two

to

4-13.

Figure

Hard

screws

4-13).

Drive

securing

Screw

the

Removal

hard

drive

to

the

5SS

the

drive

out

of

the

front

of

the

computer.

chassis

/G

Disassembly

and

Options

4-17

Remove

6.

using

Figure

the

4-14.

the

same

Hard

slide

two

Drive

bracket

screws

Slide

the

from

the

to

Bracket

reattach

and

drive

disk

hard

Figure

to

Refer

drive.

new

Removal/Installation

it

4-14.

6.

5.

6.

Set

the

configuration

using

the

each

drive-select

drive

(DS1

drive

manufacturers

drive

designation.

To

install

Replace

the

document

designation

with

drives

the

new

cover.

jumpers,

supplied

supplied

may

Check

their

drive,

reverse

switches,

with

the

must

represent

by

Zenith

use

DSO

or

documentation.

the

or

termination

new

drive.

Data

DS1

as

process

In

the

second

Systems).

the

second

in

the

resistors

this

above

computer

logical

Other

logical

steps.

Disassembly

and

Options

4-18

Replacing

3.5-inch

Drive

the

Standard

Floppy

Disk

To

replace

1.

Remove

2.

Unplug

3.

Remove
drive
support

Figure

the

the

to

4-15.

factory

the

cover.

power

the

two

the

drive

bracket.

Floppy

installed

cable

screws

housing.

Drive

3.5-inch

and

securing

Refer

Screw

floppy

ribbon

the

to

Figure

Removal

cable

from

support

disk

drive:

the

bracket

4-15.

floppy

and

Remove

drive.

floppy

the

4.

Slide

the

floppy

drive

out

of

the

front

of

the

drive

housing.

Disassembly

and

Options

5.

Remove

new

the

slide

the

drive

bracket

shown

as

from

Figure

in

the

4-16.

floppy

drive

reinstall

and

4-19

on

it

Figure

5.

Set
using
each
drive
drive
drive

Floppy

4-16.

the

configuration

the

document

drive-select

(DS1

with
manufacturers
designation.

Bracket

Drive

jumpers,

supplied

designation

drives

supplied

may

use

Check

their

Removal/Installation

switches,
with
must

by

DSO

documentation.

or

the

new

represent

Zenith

or

DS1

Data

as

termination
drive.

In

the

second

Systems).

the

second
.

resistors

this

computer

logical

Other

logical

6.

Install

the

new

drive

by

reversing

the

process

in

the

above

steps.

Disassembly

and

Options

4-20

Mounting

Disk

Drives

1.

Secure

the
bracket
adapter
in

Figure

the

drive.

the

slot

4-17.

drive

Refer

as

described

bracket

if

no

Disk

Drive

to

the

chassis

to

Figure

earlier.

to

the

drive

adapter

is

Installation

using

4-17.

3.5-inch
Use
chassis

needed.

the

the

four

or

to

four

screws

drives

screws

mount

packed

require

to

mount

the

drive

the

adapter

the

directly

with

Disassemblv

and

Options

2.

Connect

to

cables

sure

being

drives

the

on

arrow).

an

or

1
nected

to

the

the

to

the

power

back

match

the

and

is

It

first

to

cable

disk

the

of

stripe

the

card

important

drive.

Refer

the

drive

on

(pin

that

to

Connect

drive.

and

cables

the

normally

is

1

the

Figure

the

to

to

cable

4-18.

appropriate

the

controller

1

pin

the

the

by

twist

marked

with

4-21

card,
location

number

a

con-

be

POWER

HARD

DRIVE

1

[

{| F POWER

Figure

|

4-18.

Disk

50—CONDUCTOR

40—CONDUCTOR

Drive Cable

SCSI

CABLE

CABLE

Connections

P503

H

1

P505

Il

FIRST

POWER

DRIVE

TWIST

SECOND

—/

POWER

DRIVE

1

——

34—CONDUCTOR

CABLE

1

CONTROLLER
CARD

N

Disassembly

and

Options

4-22

Notice:
for

attaching

Figure

When

4-19.

N

installing

the

ribbon

3.5-inch

a

3.5-inch

cable

Ribbon

drive,

to

the

Cable

Adapter

}/

JAN

a

drive.

-

cable

Refer

adapter

to

Figure

_

may

4-19.

be

«—

needed

CABLE

Disassembly

and

Options

Blank

Panel

Removal

If

you

installed a drive

front

panel

Refer

1.

blank

must

to

Figure

panel

be

removed

4-20

to

the

that

and

front

extends

as

follows:

remove

panel.

beyond

the

indicated

the

main

chassis,

screw

securing

the

4-23

blank

the

Figure

Loosen

panel.

4-20.

(do

Blank

v

|

not

Panel

Removal

remove)

the

other

screw

P

and

remove

the

blank

4.

5.

Tighten

Install
earlier

Reconnect

the

cover

in

reverse

screw

by

performing

order.

monitor

loosened

and

peripherals.

above.

the

cover

removal

steps

outlined

Disassembly

and

Options

4-24

Real-Time

Replacement

Clock

/N

IC

Notice:
the
time
using

The
information
RTC

Caution:
sealed
shorting
procedure

Notice:

To

1.

2.

This

CMOS

replace

RAM.

Clock

IC

the

ECU

RTC

contains a lithium

IC

and

The

and

should

the

described

Use

the

Remove

Remove
the

RTC

U103

on

procedure

Note

(RTC)

software

stored

in

dispose

Real-time

not

battery.

static

precautions.

RTC:

the

cover

any

expansion

chip

on

the

system

the

to

allow

utility

the

of

it

properly.

be

Do

later

as

the

board

deletes

CMOS

Clock

not
in

described

system

all

current

re-entry

program.

battery

RAM

IC

opened.

attempt

this

section.

cards

board.

as

configuration

setup

data

of

the

correct

for

backing

inside

contains a lithium

To

prevent

to

recharge

earlier.

as

necessary

The

shown

in

information

before

data

up

setup/configuration

the

RTC

explosion

it.

to

gain

RTC

is

located

Fig

4-21.

removing

after

reassembly

IC.

Replace

battery.

hazards,

Use

the

easy

access

at

stored
the

It

location

in

Real-

the

is

safety

avoid

disposal

to

Figure

-

4-21.

Real-Time

J

Clock

:

Location

U103

022

REAL

TIME
CLOCK
BATTERY
IC

LOCATION

%

@

Disassembly

and

Options

4-25

Carefully
to

Insert

4.

with

Figure

s

Replace

5.

it

pry

the

the

4-22.

remove

its

of

out

RTC

new

properly

socket

Real-time

the

cover.

RTC

the

socket.

being

Clock

a

using

by

shown

to

in

careful

as

Replacement

flat

small

dot

the

align

Figure

4-22.

U103

‘¢,

bladed

its

on

screwdriver

package

REAL

TIME
CLOCK
BATTERY
IC

LOCATION

;"

>

Real-Time

Disposal

Clock

IC

Caution:
sealed
shorting

~

Proper

1.

2.

3.

4.

When

the

system
cating a CMOS
tion

software

The Real-time

and

should

the

battery.

disposal

Clip

Wrap

Pack

Dispose

all

exposed

the

the

of

IC

IC

of

so

the

is

powered

problem.

to

reconfigure

not

be

Do

not

the

RTC:

IC

leads.

in

insulating

it

cannot

IC

in

the

This

Clock

IC

opened.

attempt

Do

tape

be

crushed.

trash.

up

an

error

message

is

normal.

the

system.

contains a lithium

To

prevent

to

not

short

to

prevent

Run

explosion

recharge

any

acdhentd

it.

leads

may

the

ECU

battery.

together!

i

appear

configura-

It

is

safety

hazards,

shorting.

avoid

indi-

Disassembly

and

Options

4-26

Card

Guide

Removal/

Installation

Notice:

To

remove

1.

Remove

2.

Remove
circuit

3.

Use
sliding

Refer

Figure

Use

the

card

a

flat

the

to

4-23.

static

precautions.

card

guide:

the

cover

any

expansion

removal

bladed

card

guide

Figure

Card

4-23.

Guide

as

described

circuit

instructions

screwdriver

toward

Remove

Removal

earlier.

cards

outlined

and

push

the

side

the

card

in

the

the

of

guide.

computer

earlier.

center

the

computer

following

tab

in

while

chassis.

By

Disassembly

and

Options

4.

5.

6.

Replace

Replace

Replace

the

card

guide

previously

the

cover.

by

revemfsing

removed

circuit

cards.

the

above

steps.

4-27

Keylock

Removal/

Installation

remove

To

Remove

1.

Remove

2.

assembly.

Use

3.
from

Figure

the

flat

a

the

4-24.

keylock

cover

the

nut,

the

object

keylock

Keylock

assembly

described

as

lockwasher,

tooth

a

as

such

assembly.

Assembly

Figure

to

(Refer

earlier.

and

screwdriver

Removal

4-24):

‘;racket

remove

to

from

the

lock

the

retainer

clip

/D§

I

4.

5.

Remove

Install
above

the

keylock

the

new

steps.

lock

assembly

assembly

9

from

the

by

reversing

\

chassis.

the

process

in

N

the

6.

Replace

the

cover.

Disassembly

and

Options

4-28

Power

Switch

Replacement

To

replace

1.

Remove

2.

If

removed
earlier

3.

There
One

board.

4.

Remove

Refer

Figure

the

power

the

adisk

drive

to

instructions

are

two

runs

to

Unplug

the

to

Figure

4-25.

Power

switch:

cover

is

installed

allow

cables

the

power

both.

on/off

4-25.

Switch

as

described

removal

for

disk

coming

supply

switch

Replacement

ealier.

®

in

the

top

of

the

drive

from

while

plastic

slot,

the

power

switch

removal.

the

power

the

other

cap

by

pulling

drive

must

assembly.

switch

runs

to

it

straight

be

Refer

assembly.

the

system

out.

1R

to

Disassembly

and

Options

5.

6.

9.

10.

11.

Remove

Remove
and

to

one

Push

the

Remove
chassis

To

install

above

steps.

Replace

Replace

the

power

the

disk

side.

power

the

two

front.

Remove

the

the

disk

the

cover.

drive

switch

screws

new

drive

indicator

LED

LED

securing

the

switch

switch

assembly,

if

removed

LED

assembly

indicator

assembly

the

assembly.

reverse

in

step

from

assembly

through

switch

assembly

the

2.

the

by

pushing

the

hole.

process

plastic

cap.

it

to

the

in

the

in

N

Hard

Access

Disk

LED

Replacement

Drive

replace

To

Remove

1.

Ifa

2.

allow
instructions

the

the

drive

disk

removal

drive

cover

is

for

access

described

as

installed

drive

the

of

drive

disk

assembly:

LED

in

access

removal.

earlier.

top

the

drive

assembly.

LED

slot,

remove

Refer

drive

the

earlier

to

4-29

to

Remove

3.
pushing

Unplug

4.

Figure

disk

hard

the

to

and

in

it

cable

LED

the

4-26.

Hard

Disk

>,

drive

side.

one

from

Drive

access

Refer

disk

the

Access

AN

LED

to

LED

indicator

Figure

controller

drive

Assembly

assembly

4-26.

Removal

_

by

card.

To

install a new

above

steps.

Replace

Replace

the

the

LED

disk

drive

cover.

assembly,

if

removed

simply

in

reverse

step

2,

Disassembly

the

process

and

Options

in

the

4-30

System

Board

Removal/

Installation

Notice:

1.

Remove

2.

Remove

3.

Disconnect

cable

4.

Remove

5.

Remove

6.

Refer

board

Figure

Use

from

to

to

4-27.

static

the

cover

all

circuit

the

the

the

backplane

the

system

Figure

the

chassis.

System

precautions.

as

described

cards

as

power

system

4-27

Board

supply

board.

card

memory

and

remove

Removal

earlier.

described

connector

as

described

card

as

described

the

screws

earlier.

and

the

earlier.

that

power

earlier.

secure

WoY

)3

switch

the

system

Disassembly

and

Options

7.

Use a 3/16-inch
from

the

the

rear

Slide

the

remove

To

install

steps.

two

panel

system

it

through

the

hex

serial

connectors

of

the

board

the

new

system

nutdriver

computer.

toward

side

of

the

board,

to

remove

and

the

the

front

computer.

reverse

the

hex

parallel

of

the

the

port

computer

process

threaded

connector

and

in

the

spacers

on

above

25N

S

Power

Supply

Removal/

Installation

.

Remove

28;

.

Figure

1.

the

4-28

Remove

power

Power

the

supply

Supply

cover

following

by

Removal

as

described

these

|

==

earlier.

steps.

Refer

Figure

to

4-31

4-

L

-

2.

Disconnect

3.

Disconnect

4.

Disconnect

5.

Remove

.chassis

of

6.

Lift

7.

To

steps.

the

power

the

the

two

bottom

the

chassis.

the

power

install a new

power

cables

power

screws

and

the

supply

power

supply

from

switch

that

four

screws

up

and

supply,

from

the

the

disk

cable

secure

out

of

reverse

system

drives.

from

the

the

power

securing

the

chassis.

the

process

board.

power

supply

the

supply

supply.

to

the

to

the

in

the

above

rear

Disassembly

and

Options

4-32

TIGA

VGA

Daughtercard

Repla

cement

i

Some

models

with a VGA

require

1.

2.

3.

4.

Figure

the

Remove

Remove

Place

daughtercard

Carefully

4-29.

:r
|

|

:

T

of

this

computer

daughtercard

VGA

daughtercard

the

cover

as

the

TIGA

video

the

TIGA

card

facing

unplug

VGA

the

Daughtercard

—

l___l__;

are

equipped

installed

described

on

up.

VGA

on

to

be

card

from

a

static-free

daughtercard

Replacement

=

P

J

it.

If

VGA

replaced,

earlier.

the

backplane.

work

l

.

with

a

problems

follow

surface

from

the

_T‘

o

TIGA

these

with

TIGA

=0

t:fi%

video

card

develop

steps:

the

that

VGA

card.

j;,(Fz

:EE

53

€

SHDALY

A

OILON

S.

6.

Remove
and

carefully

Reverse

card

in

the

new

plug

the

process

the

computer.

VGA

daughtercard

it

onto

in

the

the

TIGA

above

from

video

steps

its

protective

card.

to

reinstall

the

TIGA

packaging

video

Disassembly

and

Options

by

1srlt

Hardware

This

chapter
ware.
tions”

program

configuration
software
installed
before

describes

For

information

section

(refer

using
or

changed,

actually

at

the

to

the

tasks

the

making

jumper

about

connector

end

of this

owner’s

necessary.

ECU

program.

it

is

necessary

the

hardware

and

switch

manual.

manual),

Most

configuration

When

to

run

changes.

Chapter

5

Configuration

settings

pinouts

Due

there

hardware

the

refer

to

are

ECU

for

computer

to

the

the

ECU

very

few

is

accomplished

options

program

hard-

“Specifica-

configuration

hardware

in

are

being

first,

Static

/N

Precautions

Warning:
source

To
lowing

prevent

e

Do
aging

e

Equalize

and
picking

®

Once
it
returned

before

precautions:

not

down

To

prevent

servicing.

component

remove

until

it

the

yourself

up

the

the

device

or

let

to

its

shock,

damage

any

static-sensitive

is

ready

to

static

electricity

by

touching

device

with

is

removed

go

of

it

protective

disconnect

from

be

installed.

between

the

work

the

other

from

until

it

is

packaging.

the

computer

static

discharges,

device

the

surface

hand.

its

protective

either

installed

from

its

work

surface,

with

one

packaging,

in

from

the

use

the

protective

the

hand

the

computer

AC

power

fol-

device,

and

do

not

pack-

then

set

or

Hardware

Configuration

Disk

Card

Controller

(Part

Number

240-7926-10)

The

disk

controller

Computer

back-up

disk

units,

drives.

Systems

etc.,

provided

Interface)

and

with

peripherals

IDE

interface

the

computer

hard

such

disk

supports

as

hard

drives

as

SCSI

disk

well

(Stalfy..S

drives,

as

flggg

~

=

gt

High

VGA

Performance

Card

(Part

Number

240-7940-10)

Note:
506
factory-supplied

ST-506

This

through
for

This

describe
option

Figure

The

factory-supplied

types

of

controller

card

contains

software

ECU

information.

card

contains

the

for

most

5-1.

hard

controller

jumper.

computer

High-Performance

disk

card

no

jumpers

using

one

The

drive

drives.

card

(and

CFG

the

ECU

jumper

factory

systems.

controller

If

an

ST-506

must

file).

or

switches.

program.

option.

default

VGA

Card

L—

be

replaced

All

Refer

Figure

setting

Jumper

card

does

type

drive

with

configuration

to

the

5-1

and

is

generally

Locations

not

support

is

to

be

an

appropriate

is

owner’s

Table

5-1
the

used,

done

manual

best

ST-

the

Table

JUMPER

J1l

NOTE

1.

Factory

e

5-1.

High-Performance

SETTING
ON

OFF!

setting

J

1

VGA

DESCRIPTION
Enables

Disables

IRQ2

IRQ2

Card

Jumper

J

Description

Hardware

Configuration

|

Z-649°-TIGA

T

Cé{ifia

Daughtercar

with

Number

181-7891-10)

Video

VGA

d

(Part

has

Z-649

The

require

that

locations

jumper

Figure

and

settings

5-2.

switches

no

hardware

5-2

Table

normally

TIGA

Video

configure

to

configuration.

jumper

for

the

are

Card

Jumpers

Refer

descriptions.

options

best

?nd

onl_y

Figure

to

for

é]uzxr;:per

two

5-2

factory

The

systems.

most

blocks

jumper

for

configured

-

Table

JUMPER

IRQ5

IRQ7
IRQ10

IRQ11

IRQ12

IRQ15

w1

NOTE

1.

Factory

5-2.

Z-649

TIGA

SETTING

1-2*

1-2
1-2

1-2

1-2

1-2
1-2!

©

23

setting

Video

Card

Jumper

DESCRIPTION
ON-Host

Host
Host

Host

Host

Host
Port

Port

Interrupt

Interrupt
Interrupt.is

Interrupt

Interrupt

Interrupt

Address
Address

is
is

Description

is

IRQS

is

IRQ7
IRQ10

is

IRQ11

is

IRQ12

is

IRQ15

290H-29FH
280H-28FH

Hardware

Configuration

-Keyboard
_,

The

computer

auto-repeat,

audible

comes

with

a

101-key

feedback,

and

keyboard.

software

The

keyboard

features

programmability.

5.1z

Keyboard
with
for
located
use
positions

for

~

located

necting
switch.

Figure

one

XT-

a

small

use

Configuration

of

two

different

or

AT-compatible

beneath

the

screwdriver

are

labeled

with

this

computer.

on

the

bottom

the

keyboard

The

switch

5-3.

Keyboard

—
keyboards.
operation.

logo

nameplate.

to

gently

AT

and

XT.

Other

of

the

keyboard

to

your

has

the

following

Configuration

The

computer

Both

On

Before

pry

up

Position

models

(refer

computer,

three

may

keyboards

some

models

plugging

the

nameplate.

the

switch

have

the

to

Figure

check

the

positions:

have

been

are

configurable

a

switch

in

the
The

in

the

XT/AT

5-3).

setting

shipped"

is

keyboard,

switch

AT

position

switch

Before

of

this

con-

Hardware

Configuration

o

AT/R — AT

e

AT/G — AT

e

XT — XT

The

indicators

Lock

keys.

indicators

compatible

compatible

compatible.

are

For

this

or

in

the

located

computer

AT/G

for

(Red

(Green

on

the

set

green

LEDs)

LEDs)

Scroll

the

switch

LED

Lock,

Num

in

the

AT/R

indicators.

Lock,

and

for

Caps

red

LED

2ouriss”

Chapter

6

|

This

chapter

puter

hardware.

- . Figure

6-1.

provides

Cabinet

and

parts

External

lists

and

exploded

Parts

Parts

views

of

the

List

base

com-

2qel

TAJ

Ly

hye

Table

Reference

‘|Number

(100

105
110
115
120

_|128

1130

135
140
145

6-1.

.

Parts

List

for

Part Part
Number

163-73

391-763-2
210-155
258-797
438-88

203-2437

1250-1556

90-1414

.

250-1650
89-65

Cabinet

Description

Keyboard,

Name
Bezel,
Spring,
Fastener

Panel,

Screw,

Cover,
Screw,
Cord,

and

101-key

plate,

trim

compression

plug,

5.25-inch

pan,

cabinet
thumb,

power,

External

logo

plastic

drive

phillips,

6-BT x .375

6-32 x .375

shielded,

Parts

US

Parts

List

o

demaiar

-

Figure

6-2.

Chassis,

BrdckE;E,-}Mounti’ng

Hardware,

and

Drive

Cables

Parts

List

Table

6-2.

Reference

Number = Number.

200
205
210

215
220

225

230
235
240

245
250

255

260

.

265

{270

4275

#1280

285
290

- -

295

*. - *

300

-

305

310

315

320
325

Parts

List

for

Brackets.and

Part

Part

Description

205-2112

250-1538
204-3403

74-56
261-76

205-2098

266-1305
204-2721
250-365

258-801 . ­200-1642

252-799:+

207-666

“

252-828

-

254:53 ° Washer,

266-1420

7

266-1419 . .

266-1421
234-\1187 " ‘Power

810-15

266-1296

151-1088-E2

810-16

151-1118-H1

151-1176-Y1
266-1295
250-1557

Cover,
Screw,
Cover,

Pad,
Feet,

Plate,

Guide,
Panel,
Screw,

Spring,

~_*

Chassis”

’.‘

Nut,

‘"

..Clamp,

'~ ° Nut,

Bracket,

Lock,

’:

Chp,

Screw,flat,

Drive

Disk

Screw,

Disk

Disk

~

Mount;

-

Screw,

adhesive

w/lock

metric,

drive,

drive,

drive,

Mounting

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plate,

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coverlock

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hard

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Reference
Number

400

405
410

415

420

425

430
435

440

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450+

|

455

Part
Number

255-757 - -

261-29
250-1538 - Screw,

.

-

150-423

240-7859-10 - Board,

258-814

256-83

240-7926-10

240-7940-10

152-36-W1'

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465

470

475

485

490

495

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1.

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134-2346

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250-1408

134-2362

134-2361

438-107

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complete

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order

Part
Description

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Clip,

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Video

Video

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hex,

rubber,

pan,

real-time

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card,

card,

backplane, 5 slot

system

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on/off,

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34-condictor,

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40-conductor,

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video

card

number

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threaded,

square

phillips,

25

MHz

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