NEC Personal Computer NEC Computer Systems Division Packard Bell NEC Inc User Manual

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PROPRIETARY NOTICE AND LIABILITY DISCLAIMER

The information disclosed in this document, including all designs and related materials, is

the valuable property of NEC Computer Systems Division, Packard Bell NEC, Inc.

(NECCSD, PBNEC) and/or its licensors. NECCSD and/or its licensors, as appropriate, re-

serve all patent, copyright and other proprietary rights to this document, including all de-

sign, manufacturing, reproduction, use, and sales rights thereto, except to the extent said

rights are expressly granted to others.

The NECCSD product(s) discussed in this document are warranted in accordance with the

terms of the Warranty Statement accompanying each product. However, actual

performance of each such product is dependent upon factors such as system configuration,

customer data, and operator control. Since implementation by customers of each product

may vary, the suitability of specific product configurations and applications must be

determined by the customer and is not warranted by NECCSD.

To allow for design and specification improvements, the information in this document is

subject to change at any time, without notice. Reproduction of this document or portions

thereof without prior written approval of NECCSD is prohibited.

NEC is a registered trademark of NEC Corporation;

Versa is a U.S. registered trademark of NEC Technologies, Inc.;

all are used under license by NEC Computer Systems Division (NECCSD), Packard Bell NEC, Inc.

All other product, brand, or trade names used in this publication are the trademarks or registered

trademarks of their respective trademark owners.

First Printing — March 1997

NEC Computer Systems Division, Packard Bell NEC, Inc.

1414 Massachusetts Avenue

Boxborough, MA 01719

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iii

Contents

Preface......................................................................................................................... xi

Abbreviations............................................................................................................... xiii

Section 1 Introduction

Feature Highlights........................................................................................................1-2

System Configuration...................................................................................................1-3

Quick Tour of the Notebook........................................................................................1-4

Main Components.................................................................................................1-4

Color LCD Display Panel...............................................................................1-4

Power Switch/LCD Cover Switch..................................................................1-4

Status Panel and Power Indicator...................................................................1-4

Keyboard .......................................................................................................1-5

VersaGlide.....................................................................................................1-6

Memory Slot Compartment............................................................................1-7

The Right Side of the Notebook............................................................................1-7

Built-In Disk Drive.........................................................................................1-7

PC Card Slot Compartment............................................................................1-7

Hard Disk Drive Compartment.......................................................................1-8

Front of the Notebook ..........................................................................................1-8

Battery Compartment.....................................................................................1-8

Left Side of the Notebook.....................................................................................1-9

DC-IN Connector Jack...................................................................................1-9

Hardware Reset Switch..................................................................................1-10

The Rear of the Notebook.....................................................................................1-10

External Keyboard and PS/2 Mouse Port .......................................................1-10

VGA Port ......................................................................................................1-11

Printer Port....................................................................................................1-12

Serial Port (COM1)........................................................................................1-12

Bottom of the Notebook.......................................................................................1-12

Battery Module Handle and Lock...................................................................1-13

ROM Memory Compartment Cover...............................................................1-13

System BIOS Setup Program.......................................................................................1-14

The Boot Setup Menu..................................................................................................1-14

System Upgrades .........................................................................................................1-19

Memory Upgrade Procedure........................................................................................1-19

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Contents

System BIOS Upgrade Procedure ................................................................................1-20

Section 2 General Specifications

Product Mix.................................................................................................................2-6

System Board Specifications........................................................................................2-7

Transfer Board Specifications ......................................................................................2-8

Converter Board Specifications....................................................................................2-8

LED Indicator Board Specifications.............................................................................2-9

I/O Board Specifications..............................................................................................2-10

LCD Inverter Board Specifications ..............................................................................2-12

LED Status Indicators Specifications ...........................................................................2-13

Diskette Drive Specifications .......................................................................................2-13

HDD Unit Specifications..............................................................................................2-14

CD-ROM Specifications ..............................................................................................2-14

NIMH Battery Pack Specifications...............................................................................2-14

DC/DC Converter & Battery Charger Specifications....................................................2-15

Battery Charger Specifications.....................................................................................2-15

Keyboard Specifications...............................................................................................2-16

AC/DC Adapter Specifications.....................................................................................2-16

BIOS Specifications.....................................................................................................2-17

Micro-Controller Function Description ........................................................................2-18

Power Management Features (Mode Definition) ..........................................................2-19

Power Management Features (Mode Transition) ..........................................................2-20

Hot Key Definition.......................................................................................................2-21

Environmental Specifications .......................................................................................2-21

Power Source Specifications........................................................................................2-22

Vibration Specifications ...............................................................................................2-22

Shock Specifications....................................................................................................2-22

Electro-Static Discharge (ESD) Specifications .............................................................2-23

Section 3 Hardware Functional Overview

Functional Block Diagram............................................................................................3-2

System BIOS...............................................................................................................3-2

System Processor..................................................................................................3-3

Major Functional Blocks.......................................................................................3-3

System Logic Controller ..............................................................................................3-4

Memory Subsystem......................................................................................................3-6

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DRAM Memory....................................................................................................3-6

ROM Subsystem...................................................................................................3-6

I/O Subsystem .............................................................................................................3-6

VIDEO Subsystem.......................................................................................................3-7

Video Chipset Controller ......................................................................................3-7

External VGA Capability.......................................................................................3-8

Keyboard Subsystem....................................................................................................3-8

PCMCIA Controller and Sockets.................................................................................3-9

Hard Disk Subsystem...................................................................................................3-9

Diskette Drive Subsystem ............................................................................................3-10

Pointing Device Subsystem ..........................................................................................3-10

Power Subsystem.........................................................................................................3-10

AC Power Adapter ...............................................................................................3-10

Internal Battery Pack ............................................................................................3-11

Power Board.........................................................................................................3-11

LCD Inverter Board Assembly..............................................................................3-11

Section 4 Field Service Guidelines

Preventive Maintenance ...............................................................................................4-1

Cleaning the Notebook’s Exterior .........................................................................4-1

Cleaning the Notebook’s Interior ..........................................................................4-2

Protecting the Disk Drives ....................................................................................4-2

Handling the Computer Battery Packs...................................................................4-2

Maintaining the LCD Quality ................................................................................4-3

Required Tools and Replacement Procedures...............................................................4-3

Parts Removal and Replacement Procedures ................................................................4-4

Removing/Replacing the Notebook Battery Pack ..................................................4-4

Removing/Replacing the Hard Disk Drive Module ................................................4-5

Removing/Replacing the Diskette Drive Module ...................................................4-5

Removing/Replacing the LCD Status Bar Cover and Hinges .................................4-6

Removing/Replacing the Keyboard........................................................................4-7

Removing/Replacing the Heat Plate.......................................................................4-7

Removing/Replacing the CPU...............................................................................4-7

Removing/Replacing the Cover-Display LCD Assembly Module...........................4-8

Removing/Replacing the System Top Cover Assembly and the NEC VersaGlide

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

Removing/Replacing the LED Board.....................................................................4-9

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Contents

Removing/Replacing the System Board and I/O Board..........................................4-10

Separating the System Board and I/O Board .........................................................4-11

Removing/Replacing the Power Board..................................................................4-12

Illustrated Parts Breakdown.........................................................................................4-13

Packaging and Documentation ..............................................................................4-16

Section 5 Troubleshooting and Repair

Service Information......................................................................................................5-1

Technical Support........................................................................................................5-1

Product Information.....................................................................................................5-2

Ordering Information from FastFacts ....................................................................5-2

Helpful Starters............................................................................................................5-3

Power On Self Test (POST).........................................................................................5-4

POST Messages....................................................................................................5-4

Informational Messages.........................................................................................5-7

Run-time Error Messages......................................................................................5-8

Quick Troubleshooting ................................................................................................5-9

Appendix A Video Modes

VGA Standard Modes..................................................................................................A-1

VGA Extended Modes.................................................................................................A-3

VGA High Refresh Modes...........................................................................................A-5

List of Figures

1-1

1-2

1-3

1-4

1-5

1-6

1-7

1-8

1-9

1-10

1-11

1-12

NEC Versa 2500 Series Notebook ................................................................. 1-1

System Configuration Diagram....................................................................... 1-3

Standard Keyboard Layout............................................................................. 1-5

VersaGlide..................................................................................................... 1-6

Memory Slot Compartment............................................................................ 1-7

Inserting a PC Card........................................................................................ 1-8

Removing the Battery Pack............................................................................ 1-9

Left Side of the Notebook.............................................................................. 1-9

Connecting the AC Adapter to the Notebook................................................. 1-10

The Rear Side of the Notebook...................................................................... 1-10

Connecting an External Keyboard and Mouse ................................................ 1-11

Connecting an External Monitor..................................................................... 1-11

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Contents

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1-13

1-14

1-15

1-16

Connecting to the Printer Port........................................................................ 1-12

Connecting to the Serial Port ......................................................................... 1-12

Bottom View of the Notebook....................................................................... 1-13

The Boot Setup Menu.................................................................................... 1-14

3-1

Functional Block Diagram.............................................................................. 3-2

4-1

4-2

4-3

4-4

4-5

4-6

4-7

Hard Disk Drive Module Assembly ................................................................ 4-5

Floppy Drive Module Assembly ..................................................................... 4-6

The LED Board Module Assembly................................................................. 4-10

The System Board and I/O Board................................................................... 4-11

The I/O Board Module Assembly................................................................... 4-12

Power Board Module Assembly ..................................................................... 4-12

NEC Versa 2500 Series Illustrated Parts Breakdown...................................... 4-15

List of Tables

1-1

1-2

1-3

1-4

1-5

1-6

1-7

1-8

Model Configurations .................................................................................... 1-1

Feature Highlights.......................................................................................... 1-2

Fn Key Combination Summary....................................................................... 1-5

Boot Main Setup Menu.................................................................................. 1-15

Boot Setup Peripherals Menu......................................................................... 1-16

Boot Setup Security Menu............................................................................. 1-17

Boot Setup Power Savings Menu................................................................... 1-18

16 MB Memory Configurations...................................................................... 1-19

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

2-9

2-10

2-11

2-12

NEC Versa 2500 Series Specifications ........................................................... 2-1

Product Mix................................................................................................... 2-6

Main Board Specifications.............................................................................. 2-7

Transfer Board Specifications......................................................................... 2-8

Converter Board Specifications...................................................................... 2-8

LED Indicator Board Specifications............................................................... 2-9

I/O Board Specifications ................................................................................ 2-10

LCD Inverter Board Specifications................................................................. 2-12

Status LED Descriptions................................................................................ 2-13

Diskette Drive Specifications.......................................................................... 2-13

Hard Disk Drive Specifications....................................................................... 2-14

CD-ROM Reader Specifications..................................................................... 2-14

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viii

Contents

2-13

2-14

2-15

2-16

2-17

2-18

2-19

2-20

2-21

2-22

2-23

2-24

2-25

2-26

2-27

Battery Specifications..................................................................................... 2-14

DC/DC Converter & Battery Charger Specifications ...................................... 2-15

Battery Charger Specifications ....................................................................... 2-15

Keyboard Specifications................................................................................. 2-16

AC/DC Adapter Specifications....................................................................... 2-16

BIOS Specifications....................................................................................... 2-17

Micro-Controller Specifications...................................................................... 2-18

Power Management Modes............................................................................ 2-19

Mode Definitions ........................................................................................... 2-20

Hot Keys........................................................................................................ 2-21

Environmental Specifications.......................................................................... 2-21

Power Specifications...................................................................................... 2-22

Vibration Specifications ................................................................................. 2-22

Shock Specifications ...................................................................................... 2-22

Electro-Static Discharge (ESD) Specifications ............................................... 2-23

4-1

4-2

NEC Versa 2500 Series Field-Replaceable Parts............................................. 4-13

Packaging and Documentation Part Numbers ................................................. 4-16

5-1

5-2

5-3

5-4

5-5

NEC Service and Information Telephone Numbers......................................... 5-1

POST Error Messages.................................................................................... 5-4

BIOS Informational Messages........................................................................ 5-7

Run-time Error Messages............................................................................... 5-8

Quick Troubleshooting................................................................................... 5-9

A-1

A-2

A-3

A-4

A-5

A-6

A-7

A-8

A-9

A-10

A-11

A-12

VGA Standard Modes (Text Mode)............................................................... A-1

VGA Standard Modes (Graphics Mode) ........................................................ A-2

VGA Standard Modes (Planar Mode) ............................................................ A-2

VGA Standard Modes (Packed Pixel Mode) .................................................. A-2

VGA Extended Modes (Text Mode) .............................................................. A-3

VGA Extended Modes (4-Bit Linear Mode)................................................... A-3

VGA Extended Modes (8-Bit Linear Mode)................................................... A-3

VGA Extended Modes (15-Bit Linear Mode)................................................. A-3

VGA Extended Modes (16-Bit Linear Mode)-1MB Video Memory Only....... A-4

VGA Extended Modes (24-Bit Linear Mode)................................................. A-4

VGA Extended Modes (Planar Mode)............................................................ A-4

VGA Extended Modes (Packed Pixel Mode).................................................. A-4

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A-13

A-14

A-15

VGA High Refresh Modes (Packed Pixel Mode)............................................ A-5

VGA High Refresh Modes (Planar Mode)...................................................... A-5

VGA High Refresh Modes (Packed Pixel Mode)............................................ A-5

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(For United States Use Only)

FEDERAL COMMUNICATIONS COMMISSION

RADIO FREQUENCY INTERFERENCE STATEMENT

WARNING

Changes or modifications to this unit not expressly approved by the party responsible for

compliance could void the user’s authority to operate the equipment.

NOTE

This is a Class B Digital Device. This equipment has been tested and found to comply

with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits

are designed to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency energy and, if not

installed and used in accordance with the instructions, may cause harmful interference to radio

communications.

However, there is no guarantee that interference will not occur in a particular installation. If this

equipment does cause harmful interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct the interference by one or

more of the following measures.

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment to an outlet on a circuit different from the one to which the receiver is

connected.

To meet FCC standards, shielded cables and power cords are required to connect this device to a

personal computer or other Class B certified device.

Canadian Department of Communications Compliance Statement

This equipment does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio interference

Regulations of the Canadian Department of Communications.

Avis de conformité aux normes du ministère des Communications du Canada

Cet appareil respecte les limites de bruits radioélectriques applicables aux appareils numériques de Classe B prescrites dans le Règlement sur

le brouillage radioélectrique édicté par le ministère des Communications du Canada.

European Community Directive Conformance Statement

This product is in conformity with the protection requirements of EC Council Directive 89/336/EEC on the approximation of laws of the

Member States relating to electro-magnetic compatibility. This product satisfied the Class B limits of EN 55022.

NEC Computer Systems Division, Packard Bell NEC, Inc.

1414 Massachusetts Avenue

Boxborough, Massachusetts 01719

1-800-632-4525

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xiii

Abbreviations

ampere

DOS

DRAM

DTE

ECC

EDS

disk operating system

dynamic RAM

alternating current

advanced technology

(IBM PC)

data terminal equipment

error checking and correction

error detecting system

BBS

BCD

BCU

BIOS

bit

Bulletin Board System

binary-coded decimal

BIOS Customized Utility

basic input/output system

binary digit

EGA

EMS

Enhanced Graphics Adapter

Expanded Memory

Specification

EPP

enhanced parallel port

bpi

bits per inch

EPROM erasable and programmable

ROM

bps

bits per second

EVGA

Enhanced Video Graphics

Array

BUU

BIOS Upgrade Utility

centigrade

Fahrenheit

Cache

CAM

CAS

high-speed buffer storage

constantly addressable memory

column address strobe

FAX

FCC

facsimile transmission

Federal Communications

Commission

CD-ROM compact disk-ROM

frame ground

CGA

CGB

Color Graphics Adapter

Color Graphics Board

channel

frequency modulation

Function

FRU

field-replaceable unit

gigabyte

clk

clock

centimeter

GND

HDD

HEX

HGA

ground

CMOS

complementary metal oxide

semiconductor

hard disk drive

hexadecimal

COM

CONT

CPGA

CPU

communication

Hercules Graphics Adapter

hertz

contrast

ceramic pin grid array

central processing unit

cathode-ray tube

integrated circuit

identification

CRT

IDE

IDTR

intelligent device electronics

DAC

DACK

digital-to-analog converter

DMA acknowledge

direct current

interrupt descriptor table

IMR

in.

Interrupt Mask register

inch

DIP

dual in-line package

Divisor Latch Address bit

direct memory access

DMA controller

DLAB

DMA

DMAC

INTA

IPB

interrupt acknowledge

illustrated parts breakdown

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xiv

Abbreviations

IRR

ISA

ISR

I/O

Interrupt Request register

PCB

PFP

printed circuit board

plastic flat package

parallel input/output

picture element

Industry Standard Architecture

In Service register

input/output

PIO

pixel

PJQFP

PLCC

PLL

p-p

IPC

ips

integrated peripheral controller

inches per second

interrupt request

kilo (1024)

plastic J-lead quad flat pack

plastic lead chip carrier

phase lock loop

IRQ

peak-to-peak

kilo (1000)

PPI

programmable peripheral

interface

kilobyte

PROM

QFP

programmable ROM

quad flat pack

kilogram

kHz

kilohertz

RAM

random-access memory

kilovolt

RAMDAC RAM digital-to-analog

pound

RAS

RGB

RGBI

ROM

rpm

row address strobe

red green blue

red green blue intensity

read-only memory

revolutions per minute

read

LDTR

LED

LSB

LSI

local descriptor table register

light-emitting diode

least-significant bit

large-scale integration

mega

max

MDA

MFM

Mhz

milliamps

RTC

R/W

real-time clock

read/write

maximum

megabyte

slave

Monochrome Display Adapter

modified frequency modulation

megahertz

SCSI

Small Computer System

Interface

SDLC

Synchronous Data Link

Control

millimeter

millisecond

signal ground

MSB

NASC

most-significant bit

SOIC

SQFP

SVGA

small outline integrated circuit

silver quad flat package

Super Video Graphics Array

switch

National Authorized Service

Center

not connected

NDP

NMI

numeric data processor

Non-maskable Interrupt

nanosecond

TCP

TQFP

TSC

TTL

tpi

Thin chip package

Thin-quad flat package

Technical Support Center

transistor/transistor logic

tracks per inch

NSRC

National Service Response

Center

PAL

programmable array logic

personal computer

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Abbreviations

UART

universal asynchronous

receiver/transmitter

volt

Vdc

VESA

volts, direct current

video electronics standards

association

VFO

VGA

VLSI

VRAM

variable frequency oscillator

Video Graphics Array

very large-scale integration

virtual RAM

watt

µf

microfarad

µPD

µs

microprocessor

microsecond

Ω

ohm

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Section 1

Introduction

This section focuses on providing outline features and operations of the NEC Versa 2500

Series Notebook Computer, including the BIOS Setup program. (Refer to the User’s Guide

for more information on operating the notebook.) The NEC Versa 2500 Series of note-

books are lightweight, compact, and fully IBM compatible.

The NEC Versa 2500 Series Notebook comes in the following model configuration.

Table 1-1 Model Configuration

Configuration

NEC Versa 2500

Intel P54CSLM-133

16 MB

CPU

On-Board DRAM

Video Memory

Hard Disk Drive

Color LCD

1 MB

1.4 GB

12.1” DSTN LCD

Type A (3500 mA

NiMH)

Battery Pack

Figure 1-1 NEC Versa 2500 Series Notebook

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1-2

Introduction

FEATURE HIGHLIGHTS

The NEC Versa 2500 Series notebook includes a variety of innovative features designed to

meet the most demanding computing requirements

Table 1-2 Feature Highlights

Features

CPU

Description

Intel P54CSLM-133 MHz processor with internal 16 KB cache

memory and math coprocessor

Memory

On-board 16 MB RAM, can be upgraded to 48 MB

256 KB, L2 cache

Cache RAM

Display

12.1” DSTN VGA Color LCD at 800 x 600 pixels resolution with 256K

colors

VGA

32-bit Video PCI bus VGA controller/ 1 MB RAM Video Memory /

Supports up to 1024 x 768 pixels resolution for external CRT monitor

with 256 colors

HDD

Removable 2.5-inch IDE high capacity hard drive (12.7mm height)

Built-in 3.5-inch 1.44 MB floppy disk drive

FDD

Keyboard

Built-in 87/88-key keyboard with 12 programmable function keys,

embedded numeric keypad and special function control keys,

dedicated screen control keys, and inverted “T” cursor keys / IBM

enhanced 101/102-key compatible keyboard

Pointing Device

PC Card Slots

VersaGlide

Two slots that support two Type II PC cards at the same time, or one

Type III, and one Type II PC cards at the same time

I/O Port

1 x Serial Port (w/ FIFO) / 1 x Printer Port (ECP/EPP) / 1 x VGA Port

/ 1 x PS/2 keyboard & mouse port

Power System

Auto-switching AC Adapter (90V - 264V) / Rechargeable NiMH

Battery pack / Advanced power management capabilities

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Introduction

1-3

SYSTEM CONFIGURATION

The following diagram shows the NEC Versa 2500 Series system configuration.

INTEL

P54CSLM(TCP)

CPU

Cache RAM

L2: 256KB

write back

Color LCD

(800x600)

DSTN

VL Bus

Controller

(VGA)

External

VGA

Monitor

BIOS

Flash ROM

8 / 16MB RAM

On-Board

Upgradable to

48MB

NEC

VersaGlide

PS/2 Keyboard

and

Bank 1 (Slot 1)

4 / 8 / 16MB

DIMM

PS/2 Mouse

Keyboard

RS-232C

Peripheral

Serial Interface

(RS-232C)

Printer

Parallel

Interface

Built-in

HDD

PCMCIA Card

Slot x 2

PCMCIA Card

Battery Pack

3.5" FDD

Figure 1-2 System Configuration Diagram

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1-4

Introduction

QUICK TOUR OF THE NOTEBOOK

Take a moment to become familiar with the locations and functions of all controls. It is rec-

ommended that you first go through the notebook’s user guide for more information on

how to operate all of the features.

Main Components

This section describes the main features of the NEC Versa 2500 Series computer.

Color LCD Display Panel

The notebook has a built-in 12.1 inch passive matrix dual scan DSTN color liquid crystal

display (LCD) which you can adjust and tilt to your desired viewing position. The LCD

provides 800x600 pixel resolution with a maximum of 256 colors, and supports simultane-

ous display with an external VGA monitor.

The LCD screen also uses Cold Cathode Fluorescent Tube (CCFT) backlighting which con-

sumes most of the power from the notebook. To save battery power, the system has an ad-

vanced power management feature that powers down the LCD when it has not been used

for a predetermined amount of time. You can adjust the brightness and contrast level of the

LCD by pressing the “Fn “ key (lower left corner) and the desired brightness or contrast

keys (lower right corner) at the same time.

Power Switch/LCD Cover Switch

The power switch button, when pressed, turns on the notebook’s power. Press it again to

turn computer power off. Whenever the notebook is in “Save-to-file” suspend mode, the

power switch button serves as a manual resume switch, allowing you to continue your ap-

plication work where you left off.

NOTE:

Always wait for a few seconds between

turning off and turning on the power.

On the top of the unit underneath the right hinge is the LCD cover switch button. This but-

ton automatically depresses and releases when you lower or raise the LCD display panel.

Depending on your power management settings, this button will either switch the notebook

to the Suspend mode or will shut off the LCD when you close the cover.

Status Panel and Power Indicator

Directly below the LCD display, in the center near the right hinge, is the Suspend Mode

LED displays. These LEDs provide an easy way to determine the current power mode of

the unit. Below these two LEDs is a row of seven more. These LEDs light to indicate

whether a device is being accessed, whether an operation is being done, or if a certain mode

is or has been activated.

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Introduction

1-5

Keyboard

The notebook has a built-in 87/88-key keyboard that provides complete emulation of a full-

sized IBM AT-enhanced keyboard with function keys and screen/cursor control keys.

Figure 1-3 Standard Keyboard Layout

The notebook keyboard includes an embedded numeric keypad, and some special function

keys that are activated by pressing the Fn key together with another key. These special

function keys (more popularly known as “hot keys”) allow you to control and adjust some

of the notebook’s functions like; display controls, speaker volume, and power management

features. The embedded numeric keypad is activated by pressing the Num Lock key. Once

the Num Lock key is pressed the upper blue symbols become active.

NOTE: Activating the Num Lock key in turn

disables the alphanumeric keys where the embed-

ded keys are located. Press the Num Lock key

again to disable the embedded keys and resume

normal keyboard operation.

Table 1-3 Fn Key Combination Summary

Key Combination

Fn key + Esc key

Fn key + F8 key

Fn key + F10 key

Function

This key combination puts the system in Suspend mode.

This key combination mutes the PC speaker volume.

This key combination toggles between video display output to the

LCD display, to an external CRT monitor, or to a simultaneous dis-

play of LCD and CRT.

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1-6

Introduction

Table 1-3 Fn Key Combination Summary (cont’d)

Function

Key Combination

This key combination toggles the LCD display backlighting (CCFT)

on and off.

Fn key + F11 key

This key combination increases the contrast level.

This key combination decrease the contrast level.

Fn key + right key

Fn key + left key

Fn key + Up key

This key combination increase the brightness incrementally for the

LCD.

This key combination decreases the brightness incrementally for

the LCD.

Fn key + Down key

Fn key + PgUp key

Fn key + PgDn key

This key combination increases the speaker volume level incre-

mentally.

This key combination decreases the speaker volume level incre-

mentally.

The notebook’s keyboard also features an embedded editing keypad, which offers an op-

tional method for editing and moving within documents. The embedded editing keys are

color coded in blue and embedded on the front side of the embedded numeric keypads. To

use these editing keys, first press the Num Lock key and then combine the Shift key + the

desired function key to enable these editing keys. When the embedded editing keys are op-

erational, the Num Lock LED will be activated. To return to normal keyboard operation,

press the Num Lock key again. When the Num Lock LED glows the embedded numeric

key pads are activated.

VersaGlide

In front of the keyboard panel, in the center of the palm rest typing surface, is the Versa-

Glide pointing device. The buttons below the glide pad are configured (by default) as the

left and right button respectively. While the button to the right is configured as the right

button on the mouse. Moving the pointer on the screen is done by moving your finger over

the surface and directing the pointer where you want it to go.

Figure 1-4 VersaGlide

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Introduction

1-7

Memory Slot Compartment

The memory compartment is located just under the keyboard. Inside the compartment are

two extra memory module sockets which can accommodate any standard JEDEC 8 MB or

16 MB DIMM modules.

Figure 1-5 Memory Slot Compartment

The Right Side of the Notebook

This section describes the features on the right side of the NEC Versa 2500 computer.

Built-in Disk Drive

The disk drive, which supports 3.5-inch 1.44 MB high density (HD) diskettes or 720 KB

double-sided (DS) diskettes is on the right-front side of the notebook. Insert the diskette

with the metal shutter towards the drive and the diskette label facing up. To remove the

diskette, press the eject button found on the upper right of the floppy disk drive.

PC Card Slot Compartment

The compartment houses two card slots that support two Type II devices, or one Type III

device. Open the compartment door to view the PC card slots. Insert Type III cards into the

lower slot. Insert the card with the pin sockets facing towards the drive and the label facing

up. To remove the PC card, push on the eject button to release the pin connections and

slowly pull out the card.

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1-8

Introduction

The NEC Versa 2500 Series also comes with DOS/Windows PC card drivers for supporting

various PC cards like modem cards, network cards, and other I/O and memory cards. The

LED Status Bar, likewise, provides lights to indicate when the computer is accessing the in-

serted PC cards. The upper PC card slot is referred to “Slot 0” while the bottom slot is re-

ferred to as “Slot 1”. Slot 0 always takes precedence over Slot 1 in drive designations.

Figure 1-6 Inserting a PC Card

Hard Disk Drive Compartment

Just beside the diskette drive, and below the PC slots, is the notebook’s internal hard drive.

The NEC Versa 2500 Series provides an industry standard 2.5-inch, 1 GB IDE hard disk

drive. The system BIOS also includes Auto IDE detection and LBA mode for easy installa-

tion as well as later upgrades for higher capacity disk drives.

Front of the Notebook

This section describes the features on the front side of the NEC Versa 2500 Series com-

puter.

Battery Compartment

The battery compartment is in the left front corner of the notebook. It houses the recharge-

able NiMH battery pack. The battery pack begins charging whenever you connect the AC

adapter to the notebook. It is very important to always have the battery installed on the

notebook and to have it always charged. Leaving the battery pack out of the unit for a long

period of time completely drains the battery cells.

To remove the battery pack from the compartment unit, push the battery compartment re-

lease lock and slowly pull out the battery pack.

NOTE: The NEC Versa 2500 Series models

uses Type A battery packs with 3500mA.

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Introduction

1-9

Figure 1-7 Removing the Battery Pack

Left Side of the Notebook

The following details the left side of the NEC Versa 2500 Series computer.

DC-IN

Connector

Power Switch

Reset Switch

Figure 1-8 Left Side of the Notebook

DC-IN Connector Jack

The NEC Versa 2500 series provides a universal auto-switching AC adapter which con-

nects the AC power cord into the power outlet. It is important to have the AC adapter con-

nected to the notebook to recharge the battery and keep the notebook working

continuously.

NOTE:

Use only the AC adapter that comes

with the NEC Versa 2500 Series notebook.

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1-10

Introduction

Figure 1-9 Connecting the AC Adapter to the Notebook

Hardware Reset Switch

To the right of the AC adapter connector jack, you will notice a small hole which allows an

easy alternative to resetting the notebook’s hardware.

The Rear of the Notebook

The following details the rear side of the NEC Versa 2500 Series computer.

IR Port

Ext. K/B and

Sound Jacks

PS/2 Mouse

Port

Serial Port

Expansion Port

VGA Port

Parallel Port

Figure 1-10 The Rear Side of the Notebook

External Keyboard and PS/2 Mouse Port

The external keyboard and PS/2 mouse port allows you to connect an external full-sized

IBM AT-enhanced keyboard. When an external keyboard is connected, both the built-in

keyboard of the notebook and the external keyboard can be used simultaneously.

The NEC Versa 2500 Series also provides a Y-connector adapter allowing simultaneous

use of an external AT-enhanced keyboard and a PS/2 mouse. When using DOS or Windows

for Workgroups, if a external serial mouse is installed the VersaGlide is not supported.

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Introduction

1-11

Figure 1-11 Connecting an External Keyboard and PS/2 Mouse

VGA Port

The 15-pin female VGA connector allows you to connect an external VGA monitor that

supports up to 1024x768 pixels resolution. When displaying on an external VGA monitor

alone, the VGA port supports resolutions up to 1024x768 at 256 colors.

The NEC Versa 2500 Series provides a VGA VESA driver diskette for installing different

display resolution drivers for Windows Setup. You can also toggle the display between the

LCD and the external monitor by pressing the Fn key + F10 key combination.

NOTE: Even when set to 800x600 or

1024x768 resolution, the external monitor only

shows 800x600 resolution if the computer is

running at Simultaneous display. Toggle the dis-

play to the external monitor only in order to dis-

play higher resolution.

Refer also to Appendix A for a list of supported

video modes.

Figure 1-12 Connecting an External Monitor

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1-12

Introduction

Printer Port

The 25-pin printer port provides a parallel interface to connect a parallel printer or pocket

network adapter. Many operating systems and software applications refer to this port as

LPT1. You can run the BIOS Setup program to change the configuration of the parallel

port to Standard or Bi-directional.

Figure 1-13 Connecting to the Printer Port

Serial Port (COM1)

The 9-pin serial port provides a serial interface for a RS-232C device such as external serial

modem. This port is commonly referred to as COM1.

Figure 1-14 Connecting to the Serial Port

NOTE: First power off the system before con-

necting an external serial device. After turning on

the power again, run the BIOS Setup program if

needed.

Bottom of the Notebook

The bottom of the New Versa 2500 computer contains the release latches shown in the fol-

lowing figure. Pressing the release latch lets you remove the option installed in the corre-

sponding bay.

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Introduction

1-13

Figure 1-15 Bottom View of the Notebook

The following describes the bottom of the NEC Versa 2500 Series computer.

Battery Module Handle and Lock

To release the battery module from its compartment, push the battery compartment latch as

indicated by the arrow marked on it. While doing this, hold the handle of the battery module

and slowly pull it out from its compartment.

ROM Memory Compartment Cover

The ROM memory compartment cover is secured by tabs. Lift the cover with your finger-

nail to open this cover (the ROM chip is inside). It is not necessary to remove this cover

while performing normal service operations.

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1-14

Introduction

SYSTEM BIOS SETUP PROGRAM

This section provides the outline features and operation of the Phoenix BIOS Setup pro-

gram used in the NEC Versa 2500 Series. The BIOS (Basic Input-Output System) Setup

program allows you to change the system configuration settings such as the current date

and time, the disk drive and ports settings, and the power management as well.

As POST (Power-On Self Test) executes during boot up process, the screen will display the

following message:

Press F2 to Enter SETUP

Press the F2 key to run the BIOS Setup program. The BIOS Setup program is organized

into two pages of menus. Change settings using the PgDn and PgUp keys. To move from

one option to another, you use the up and down arrow keys while using the spacebar and

keys to change the settings.

To exit the BIOS Setup program, simply press the Esc key and select from the listed

choices window whether you want to load the default values for all fields; save your

changes and exit; or exit without saving any changes.

THE BOOT SETUP MENU

The boot setup menu allows you to change the following configurations:

Figure 1-16 The Bootup Setting Menu

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Introduction

1-15

Table 1-4 Boot Main Setup Menu

Function

Item

System Time

This option allows you to change the system time, using the

format hour : minute : second. You can change the system

time here or from your operating system’s command prompt.

System Date

Diskette A

Hard Disk

This option allows you to change the system date, using the

format month / day / year. You can change the system date

here or from your operating system’s command prompt.

This option allows you to specify the type of diskette drive

mounted inside the notebook. The default setting for this

option is 3.5”, 1.44 MB disk drive.

This option allows you to specify the type of hard drive

mounted inside the notebook.

Select the Auto option to instruct the BIOS to automatically

detect the relevant parameters of the hard drive.

Some hard drives, however, do not respond correctly to the

values detected. In such cases, you must search and select,

from the list, the make and model of the drive being used.

Base Memory

This field reports the amount of base (or conventional)

memory found by the BIOS during its POST. The value

should not exceed or go below 640 KB.

Extended Memory

This field reports the amount of extended memory found by

the BIOS during POST. The value displayed is the amount of

the memory address map. Because all models in the NEC

Versa 2500 Series have a minimum of 16 MB of memory as

the standard configuration, this value should not be less than

7168 KB.

Boot Options

This option allows you to configure the computer to which

drive it first looks for the operating system.

Select A:, CD-ROM (if installed) then C: if you want to boot

from a diskette. If there is no diskette found in the floppy

drive, the computer then tries to load the operating system

from the CD-ROM. If there is no CD-ROM then the computer

tries to load the operating system from the hard drive.

Select C: then A: if you want to boot from a hard drive. If

there is no operating system found in the hard drive the

computer tries to load the operating system from a floppy

drive.

Select C: only if the hard drive already holds an operating

system and all necessary startup file configurations.

SETUP prompt

Setting this to enabled display “Press <F2> to Enter SETUP”

on boot; Setting to disable suppresses the message, but

pressing <F2> will still enter SETUP.

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1-16

Introduction

Table 1-4 Boot Main Setup Menu (cont’d)

Function

Item

POST Errors

This options allow the system to pause and display the error

message at boot attempt.

Keyboard Features

Num Lock

Selects keyboard options.

This option toggles the Num Lock key on or off.

Keyboard Repeat

Rate

This option allows you to select the auto-repeat key speed.

Possible values include 2, 6, 10, 13.3, 18.5, 21.8, 26.7, or 30

seconds.

Keyboard Auto-

Repeat Delay

This option allows you to select the delay before repeat.

Possible values include 1/4, 1/2, 3/4 and 1 second.

Table 1-5 Boot Setup Peripherals Menu

Function

Item

This option allows you to configure the notebook’s serial port

as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4), (2E8-IRQ3),

or disabled. The default setting is (3F8-IRQ4).

Serial Port

This option allows you to configure the notebook’s infrared

serial port as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4),

(2E8-IRQ3), or disabled. The default is (2F8-IRQ3).

Infrared Serial Port

Parallel Port

This option allows you to configure the notebook’s parallel

port as either (378-IRQ5), (3BC-IRQ7), (278-IRQ5), (378-

IRQ7), or none. The default is (378-IRQ7).

This option allows you to configure the notebook’s parallel

mode as either Unidirectional, Bi-directional, Enhanced, or

ECP. The default is ECP.

Parallel Mode

This option disables the floppy disk controller.

Diskette Controller

IDE Adapter

This option disables the IDE adapter.

This option disables the on-board audio.

On Board Audio

I/O Channel

Changes the default value of 220h to 230h, 240h or 250h.

Changes the default value of IRQ5 to IRQ7, IRQ9 or IRQ10.

Changes the default value of CH0 to CH1 or CH3.

Changes the default value of 300h to 310h, 320h or 330h.

This option allows you to enable or disable the game port.

Changes the default value of disabled to PAL or NTSC.

IRQ Channel

DMA Channel

MPU I/O

Game Port

Display to TV

Plug & Play O/S

Select “Yes” if a Plug and Play capable operating system is

installed.

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Introduction

1-17

Table 1-6 Boot Setup Security Menu

Function

Item

This option allows you to limit access to the computer through

the use of a password. If you select this option, a pop-up win-

dow appears asking you to set or change the password. A

password can be up to seven characters in length, and is

cleared by eliminating the password with the F1 key.

Password

Note: If you forget the password of the computer, the

only way to access the system again is to discharge the

CMOS battery. See note below.

Set Password

Press Enter to enter the Password.

This option allows you to configure the Password to be en-

abled at the operating system level.

Password on Boot

This option allows you to configure the Password to be en-

abled when resuming from the Suspend mode.

Password on Re-

sume

The Caps Lock and Scroll Lock LED’s flash in sequence for

30 seconds, indicating that the password is required to re-

sume. The LED’s start flashing again as soon as a key is hit

until a password is entered.

NOTE: You can discharge the CMOS battery

by simply unplugging the RTC CMOS battery

from the connector CN11 of the motherboard.

You must wait for 10 minutes before plugging in

the battery again.

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1-18

Introduction

Table 1-7 Boot Setup Power Savings Menu

Function

Item

This option allows you to enable or disable power manage-

ment.

Power Saving

Disabled

, all other power management settings are ig-

Select

nored and disabled as well.

Disabled ON AC

Select

, the power management is disabled

only when the computer is powered by the AC adapter, but

will enable the power management while on battery.

Enabled

, the power management is enabled all the

Select

time.

This option allows you to specify the length of time the system

will be in the Idle Mode before entering the Standby mode.

Standby Time-out

Standby Mode places the Serial, infrared and parallel ports,

floppy drive, and hard drive into a power saving mode.

Disabled, 1, 2, 4, 8, 16 minutes

Possible values include

This option allows you to specify the length of time the system

will be in the Standby mode before entering the Suspend

mode.

Auto Suspend

Time-out

Disabled, 1, 2, 4, 8, 16 minutes

Possible values include

This option allows you to enable Suspend mode.

Suspend Mode

Save to File

Select

, the computer saves data to the hard drive.

It is important to have a hidden file on the hard drive when

enabling this; otherwise an error message appears on the

display screen when the system restarts.

SUSPEND

, the computer saves data to RAM

Select

The computer switches to the Suspend mode after the preset

time of inactivity. During this Suspend mode the computer

becomes inactive, all devices are in Suspend mode, and the

CPU is powered off.

This option allows you to select a specific time-out value after

which power to the hard drive is shut down. Possible values

Hard Disk Time-out

Disabled, 1, 2, 4, 8, 16 minutes

include

When not disabled, the hard drive shuts off after the preset

time of inactivity. The hard drive will activate again when the

system tries to access it; this may cause a slight delay in the

computer’s operation as it waits for the hard drive to power up

again.

Disable

Set this option to

be spinning.

if you want the hard drive to always

This option allows you to specify a length of time the key-

board and mouse is inactive before the screen is turned off.

Video Time-out

Disabled, 1, 2, 4 ,8, 16 minutes

Possible values include

Note: If you use “screen saver” software, the Video Monitor

Disabled

should be set to

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1-19

Table 1-7 Boot Setup Power Savings Menu (cont’d)

Function

Item

This option allows you to effectively program the type of event

which occurs when the display panel is closed.

Cover Switch Con-

trol

SUSPEND

, the computer enters the SUSPEND Mode

Select

when the LCD Panel is closed.

Backlight Off

Select

, the system powers down the LCD when

the LCD Panel is closed.

This option allows you to resume the system if an incoming

call is received from the serial port modem.

Serial Port Ring Re-

sume

Off

Select

, the computer does not resume.

Select On, the computer resumes.

This feature does not apply to PC card port modems.

SYSTEM UPGRADES

The NEC Versa notebook is easily upgradable to a higher capacity hard drive. In addition,

you can add an optional second memory modules to increase the system memory to as

much as 48 MB. This section provides the settings needed as well as illustrations for up-

grading the system.

MEMORY UPGRADE PROCEDURE

The NEC Versa notebook allows you to install and expand the on-board 16 MB system

memory via the memory compartment found under the keyboard. Inside the compartment is

an extra memory module socket which can accommodate any standard JEDEC 8 MB and

16 MB DIMM modules.

For NEC Versa 2500 Series notebooks, the following memory configurations are applica-

ble:

Table 1-8 16 MB Memory Configurations

On-Board Memory

Extra Socket

Total Memory

16 MB

empty

8 MB

16 MB

24 MB

32 MB

48 MB

16 MB

32 MB

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1-20

Introduction

To upgrade the memory in the notebook, follow these steps.

1. Power off the computer and remove the AC adapter and battery pack.

2. Remove the hinge covers, status bar cover, and the keyboard from the top of the

unit and locate the memory expansion sockets.

3. Remove the extra DIMM module from its anti-static wrapping.

4. Hold the memory module with its golden teeth connector pointed towards the

memory socket.

Note: The top socket is connector 0 and

should be used when installing only one module.

Incline the module at 60 degrees and gently attached it to the memory socket by

pushing it forward.

5. Slowly push the module downwards until the locking tabs snap into the retaining

notches or holes at each corner of the module.

The bottom socket sits a little in front of the top socket for easier access. How-

ever, installation for both sockets is the same.

6. Replace the keyboard, status bar cover, and hinge covers.

7. Reconnect the AC adapter and insert the battery pack into the computer.

8. Power on the notebook and notice the BIOS error message informing you that the

memory size stored in CMOS does not match the installed memory size. Press F2

to run the SETUP program and save the CMOS settings anew. The computer

automatically adjusts the memory size.

NOTE: If the notebook has been configured for

save-to-disk, it may be necessary to run PHDisk

to re-partition the drive. The save-to-disk parti-

tion must be of a size sufficient to store the con-

tent of the whole memory size.

SYSTEM BIOS UPGRADE PROCEDURE

The NEC Versa 2500 Series supports the EPROM Flash BIOS that allows you to easily

update the system BIOS using the Flash Programming utility program called

“PHLASH.COM & PLATFORM.BIN”. Update the system BIOS whenever you are upgrad-

ing the LCD Panel or adding modifications to the computer’s hardware function. To up-

grade the System BIOS:

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Introduction

1-21

1. Copy the PHLASH.COM & PLATFORM.BIN BIOS utility program and the BIOS

ROM file to the hard disk subdirectory. You can also choose to run the program

from the diskette.

2. Disable EMM386 or other memory manager programs before restarting the com-

puter. When booting DOS, press F5 to bypass the CONFIG.SYS and

AUTOEXEC.BAT. You may also choose to boot from Drive A: with a clean DOS

diskette.

3. At the DOS prompt, type “PHLASH <BIOSfilename.ROM>” to activate Flash

BIOS programming utility. The computer then prompts you again before starting

to update the system BIOS. After programming is complete, the system prompts

you to reboot the computer to activate the new system BIOS.

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Section 2

General Specifications

The following table lists NEC Versa 2500 Series system specifications.

Table 2-1 NEC Versa 2500 Series Specifications

ITEM

SPECIFICATION

CPU

Pentium P54CSLM-133 MHz

TCP Package

System RAM

16 MB On-board

Upgradeable to 48 MB

Memory Modules: 8 MB/16 MB/32 MB

256 KB, L2Cache

RAM Module Slot

Two Slots

2M (256K x 8) Flash BIOS:

Includes System and VGA

Shadow BIOS Capability

Operation Modes:

System Management

Power Management

Full On Mode

Doze Mode

Standby Mode

5V Suspend Mode

0-volt Suspend Mode

Peripheral Automatic Power Down

Cover Switch Support

Removable HDD Module

2.5-inch format / 12.7mm high

Enhanced IDE Interface

Support IDE PIO mode up to MODE 4

Support IDE MASTER MODE

1.4 GB

Hard Disk Drive

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2-2

General Specifications

Table 2-1 NEC Versa 2500 Series Specifications (cont’d)

SPECIFICATION

ITEM

CD-ROM Reader

Diskette Drive

Removable CD-ROM Reader

8x speed

Removable Diskette Drive

720KB/1.44 MB Mode Support (Overseas version)

12.1” DSTN Color LCD Module:

800 x 600 in 256 colors

Display

External CRT Capability:

640 x 480 in 64K colors

800 x 600 in 64K colors

1024 x 768 in 256 colors

LCD / CRT Display Simultaneously

32-bit PCI Bus

LCD / CRT Auto-Sense

32-bit Graphics Engine

Video RAM

1 MB as Standard

5V EDO 60NS DRAM 40-Pin SOJ

Two Type II slots or one Type III slot

PCMCIA Socket compatible with CARD BUS standard

Nec VersaGlide

PCMCIA Slots

Pointing Device

Keyboard

PS/2 Interface

Keyboard Layout:

US Layout - 87 Keys

European Layout - 88 Keys

Support Extra Windows 95 HotKeys

Inverted T Compatible Direction Key

Overlapped/Embedded Function and Numeric Keypad

Internal and External Keyboard Simultaneous Function

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General Specifications

2-3

Table 2-1 NEC Versa 2500 Series Specifications (cont’d)

SPECIFICATION

ITEM

HotKey

Operation

Fn + F8 = PC Beep Mute

Fn + Esc = Suspend Control

Fn + <Right Arrow> = Contrast Up

Fn + <Left Arrow> = Contrast Down

Fn + <Up> = Brightness Up

Fn + <Down> = Brightness Down

Fn + <PgDn> = Decrease Speaker Volume

Fn + <PgUp> = Increase Speaker Volume

Fn + F10 = CRT/LCD/Simul.

Fn + F11 = Backlight On/Off

25-pin Parallel Port

I/O Port

9-pin Serial Port

15-pin VGA Monitor Port

External Keyboard or PS/2 Mouse Port

NEC Y-Cable Support

DC-IN Jack

IR Port

Port Replicator

Support Game port

TV out

External Keyboard

External PS/2 Mouse

Serial Port (COM1)

Printer Port (LPT1)

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2-4

General Specifications

Table 2-1 NEC Versa 2500 Series Specifications (cont’d)

SPECIFICATION

ITEM

Audio

Support external Stereo Headphone Jack

Support external Stereo Line-In Jack

Support external MIC. Jack

Two Built-in speakers

Built in microphone

Status Indicator

LED Display

External LED

Power On & Battery Low (Blinking)

Internal LED

Battery Charge

PCMCIA A/B Slot - Read / Write

HDD / FDD / CD-ROM - Read / Write

PMU - Enable

Num Lock - Enable

Caps Lock - Enable

Scroll Lock - Enable

Power Supply

AC Adapter

AC 100V to 240V, 47/63Hz, 36W (Max)

Constant Power Output

Dimensions: 120 (L) x 60 (W) x 36 (H) mm

Battery Input

Battery A: 10 long A-size 3500mA/hr Ni-MH Battery Cells, 12V

(Total - 42W)

Battery Fast Charge (Single Battery Pack)

Machine On: 6 hours maximum

Machine Off: 3 hours maximum

Heat Pipe

Heat Dissipation

Dimension

297mm (L) x 240mm (W) x 50.8mm (H)

External Battery Charger

Port Replicator

Optional Items

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General Specifications

2-5

Table 2-1 NEC Versa 2500 Series Specifications (cont’d)

SPECIFICATION

ITEM

Key Components

12.1” Color DSTN SVGA LCD: EDMGR68KBF (Panasonic)

CD-ROM:

CDR-38E-900

Hard Disk Drive:

1.4 GB MK1401MAV (Toshiba)

Diskette Drive:

NEC FD1238H

Keyboard:

87/88 Key Full Size (Windows 95)

Controller: Mitsubishi M38813M4

VersaGlide:

TM1002S-D Synaptics, or

KGDDBA-911A Alps

Battery:

Panasonic NiMH 1.2V, LA, HHR350A

Sanyo NiMH 1.2V, LA, HR 4 / 3

Audio Amplifier: ROHM BA7786FP

Micro Controller: Micro Chip PIC16C62

Clock:

Generator: ICS AV9154-43

Buffer: NS CGS74CT2524 & CGS74CT2525

Core Logic:

UMC 8891BF-N

UMC 8892BF-N

UMC 8886BF-N

VGA Chip: C&T 65548

Super I/O: NS PC87336VLJ

PCMCIA

Controller: Omega 82C094

Decoder: Omega OM82C28

Power Switch: Micreel MIC2563-1

BIOS: Phoenix

IR Chip: TemicTFDS3000

Audio Chip: ESS 1788

Regulor: NS LP2952

RS232 Driver: MAXIM MAX213

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2-6

General Specifications

Table 2-1 NEC Versa 2500 Series Specifications (cont’d)

ITEM

SPECIFICATION

Flash ROM: AMD AM29F002T

PWM Controller: MAXIM MAX797

MOSFET: NS 9410 & 9953

AC Adapter

PRODUCT MIX

The following table lists the NEC Versa 2500 Series product mix.

Table 2-2 Product Mix

Versa 2500)

CPU

Intel^®Pentium/133 MHz,

P54CSLM(TCP)

On-Board DRAM

16 MB

256KB, L2 Cache

1 MB

Video RAM

HDD

1.4 GB

LCD

12.1” DSTN LCD

Removable

FDD

CD-ROM

Battery Pack

Type A

3500mAH NiMH

Pointing Device

PCMCIA

Glide Pad

2 x Type II / 1 x Type III

Keyboard

87/88 Keyboard (Windows 95)

EPP/ECP Parallel

Serial Port

VGA Port

Yes

PS/2 Port

DC-in Jack

Audio Port

IR Port

Expansion Port

Power Code

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General Specifications

2-7

SYSTEM BOARD SPECIFICATIONS

The following table lists system board specifications.

Table 2-3 Main Board Specifications

ITEM

SPECIFICATION

NS Clock Buffer CGS74CT 2524

Clock

CPU

∗

PGA Socket

Cache

256KB, L2

DRAM

1M x 16-bit DRAM x 4

Video RAM

System Chipset

256K x 16-bit DRAM (5V / 60ns), SOJ x 2

UMC UM8891BN, 208 Pin, PQFP

UMC UM8892BN, 208 Pin, PQFP

C&T 65548, 208 Pin, PQFP

VGA

PCMCIA

Omega 82C094, 208 Pin, TQFP

Omega 82C028, 28 Pin SOIC

Internal

To System PCB:

100 Pin, AMP

To HDD:

Connector &

Socket

50 Pin, KEL

To CD-ROM:

40 Pin, KEL

2 Pin, Molex

To Transfer PCB:

2 Pin, Molex

To DC Converter

32 Pin, Suyin

COM1:

External

Connector

9 Pin, Suyin

Printer:

25 Pin

Docking:

160 Pin

PCB

Thickness: 1.2mm

Layers: 8

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2-8

General Specifications

TRANSFER BOARD SPECIFICATIONS

The following table lists Transfer board specifications.

Table 2-4 Transfer Board Specifications

ITEM

SPECIFICATION

Internal Connector

To FDD:

100 Pin, AMP

To second battery

100 Pin, AMP

PCB

Thickness: 1.2mm

Layers: 4

CONVERTER BOARD SPECIFICATIONS

The following table lists Converter board specifications.

Table 2-5 Converter Board Specifications

ITEM

∗

SPECIFICATION

Internal Connector

To I/O PCB:

32 Pin, Suyin

To 1^stBattery:

10 Pin, Suyin

To Y-Cable Connector:

32 Pin, Suyin

To AC Adapter

2 Pin

External Connector

PCB

Thickness 1.2mm

Layers: 6

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General Specifications

2-9

LED INDICATOR BOARD SPECIFICATIONS

The following table lists LED indicator board specifications.

Table 2-6 LED Indicator Board Specifications

ITEM

SPECIFICATION

Internal Connector

To System PCB

50 Pin, Suyin

To System PCB

40 Pin, Suyin

To LCD Panel

50 Pin, KEL

To Inverter

8 Pin, Molex

To Left Speaker

2 Pin, Molex

To Right Speaker

2 Pin, Molex

To LCD Panel

41 Pin, KEL

To IR

8 Pin, Temic

To USB

4 Pin, AMP

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2-10

General Specifications

I/O BOARD SPECIFICATIONS

The following table lists I/O board specifications.

Table 2-7 I/O Board Specifications

ITEM

SPECIFICATIONS

Clock

Crystal 14.318 MHz, DIP Type

Crystal 32.768KHz, DIP Type

Crystal 4 MHz, DIP Type

Generator:

AV9154-43, SOP 16 Pin

Buffer:

CGS74CT2524

ROM

Flash ROM for BIOS

256K x 8, 150ns

System Chip Set

Super I/O

UMC UM8886BN, 208 Pin, PQFP

NS87336, 100 Pin, PQFP

Keyboard Controller

Micro Controller

CMOS Battery

Audio

Mitsubishi 38813M4, 64 Pin, QFP

PIC16C62, 28 Pin, SOIC

VARTA 60mA, 3.6V NiMH Battery

ES17888 Sound Chip, 100 Pin, PQFP

ROHM BA77786FS, 25 Pin, SOIC

Amplifier

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General Specifications

2-11

Table 2-7 I/O Board Specifications (cont’d)

SPECIFICATIONS

ITEM

Internal Connector

To System PCB

100 Pin, AMP

To System PCB

100 Pin, AMP

To HDD Unit

50 Pin, KEL

To CD ROM Unit

40 Pin, KEL

To RTC Battery

2 Pin, Molex

To Transfer PCB

40 Pin, Suyin

To DC Converter

32 Pin, Suyin

COM1

External Connector

9 Pin, Suyin

Printer

25 Pin, Suyin

Docking

160 Pin, Berg

PCB

Thickness: 1.2 mm

Layers: 6

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2-12

General Specifications

LCD INVERTER BOARD SPECIFICATIONS

The following table lists LCD inverter board specifications.

Table 2-8 LCD Inverter Board Specifications

ITEM

Specification

Color Inverter

Panasonic 12.1” DSTN

LMG9980ZWC

Input Voltage

8V to 20V

500VAC Max.

28V ~ 31V

6mA (Max.)

Hot Key

Output Voltage

Contrast Voltage

Output Load Current

Brightness Control

Contrast Control

Efficiency

Hot Key

70% Min.

Unit Size (L x W x H) 146 (L) x 22.5(W) x 9.5 (H)

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General Specifications

2-13

LED STATUS INDICATORS

The following table lists NEC Versa 2500 Series LEDs. For example, the AC IN LED lights

to indicate power is on and that the battery is charging.

Table 2-9 Status LED Descriptions

ITEM

LED

PMU Enabled

HDD, FDD and CD-ROM Read / Write

PC Card Slots Read / Write

Num Lock

Caps Lock

Scroll Lock

DISKETTE DRIVE SPECIFICATIONS

The following table lists the standard diskette drive specifications.

Table 2-10 Diskette Drive Specifications

Specification

ITEM

Module

Mode

3.5” Module

2 Mode FDD (1.44 MB / 720 KB)

110mm (L) x 96mm (W) x 12.7mm (H)

Unit Size

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2-14

General Specifications

HDD UNIT SPECIFICATIONS

The following table lists the standard hard drive specifications.

Table 2-11 Hard Disk Drive Specifications

ITEM

SPECIFICATION

Module

2.5” Removable HDD Module

1.4 GB

Capacity

Interface

Unit Size

Enhanced IDE Interface

100mm (L) x 70mm (W) x 12.7mm (H)

CD-ROM SPECIFICATIONS

The following table lists the standard CD-ROM reader specifications.

Table 2-12 CD-ROM Reader Specifications

ITEM

SPECIFICATION

Module

8X CD-ROM (TEAC)

IDE Interface

Mode

Data Transfer

Unit Size

13.3 MB/sec

140.5mm (L) X 130.6mm (W) X 17.0mm (H)

NIMH BATTERY PACK SPECIFICATIONS

The following table lists the standard battery specifications.

Table 2-13 Battery Specifications

ITEM

SPECIFICATIONS

Capacity

Cell Type

Voltage

3500 mA x 10 cells

Long A

12V

Connector

10-Pin

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2-15

DC/DC CONVERTER & BATTERY CHARGER SPECIFICATIONS

The following table lists DC/DC converter & battery charger specifications.

Table 2-14 DC/DC Converter & Battery Charger

Specifications

ITEM

SPECIFICATION

Input Voltage

Output Voltage

Output Current

6V -> 19V

12V, 5V, 3.3V

0.1A, 2.5A, 2.5A

150mV, 100mV, 100mV

Output Ripple

Voltage

Protection

Short Circuit Protection, OCP

Input under voltage latch

80% Min. (Typ.)

Efficiency

PCB

1.2mm / 6 Layers

BATTERY CHARGER SPECIFICATIONS

The following table lists battery charger specifications.

Table 2-15 Battery Charger Specifications

ITEM

SPECIFICATION

Input Voltage

Support Battery

Protection

20V (Max.)

NiMH Battery (12V)

Max. Temp., Max. Timer

Delta T / Delta t: 1^oC (min.)

Charge Method

53 ^oC ~ 60 ^oC

Max. Temperature

Timer Setting

Charge Time

360 Min.

Machine On: 6 hours

Machine Off: 1.5 hours

BQ2005

Charge IC

Connector

To M/B:

10 Pin & 18 Pin, Male, Straight, DIP/SMT

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2-16

General Specifications

KEYBOARD SPECIFICATIONS

The following table lists keyboard specifications.

Table 2-16 Keyboard Specifications

ITEM

SPECIFICATION

Key Switch Type

Key Stroke

Membrane

3.0 ± 0.5mm

50 ± 20GF

19.05mm

Operating Force

Key Pitch

AC/DC ADAPTER SPECIFICATIONS

The following table lists AC/DC adapter specifications.

Table 2-17 AC/DC Adapter Specifications

ITEM

SPECIFICATION

Input Voltage

Ripple Noise

Output Voltage

Protection

AC 90V -> 265V, 50 -> 63Hz

100mvp-P

20V Max.

Short Circuit UVP, OVP

Safety Approval, FCC Shielding AC cord

2-pin, 100cm long with coil at system end

AC Power On

AC Cord

DC Output Cable

Indicator

Unit Size

120mm (L) x 62mm (W) x 36mm (H)

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2-17

BIOS SPECIFICATIONS

The following table lists BIOS specifications.

Table 2-18 BIOS Specifications

Specification

ITEM

Floppy Disk Drive

Support standard 3.5” FDD

Support 720KB and 1.44 MB Modes

Support Standard IDE Hard Disk

Auto-detect IDE Features

Hard Disk Drive

VGA Display

Support LBA mode for larger capacity

Use Chips OC65548 VGA BIOS to support Monitor Sense or Auto

Display

PCI Super VGA Function Call

8 Sets Built-In Panel Parameters

Serial Port

Support Standard COM Port Address with optional selection on

Setup Menu

Support for IR communication port

Parallel Port

Support EPP, ECP, and Standard Printer Port Address

Provide Optional Item in Parallel Port on Setup Menu

Always enable VGA and System BIOS Shadow

Phoenix PCM Plus will be provided

Shadow & Cache

PCMCIA

PCMCIA 2.1 Specification Compliance

External Device

Support

Interface of external PS/2 mouse and external keyboard

The internal Glide Pad will be disabled while external PS/2 mouse

is connected

CD-ROM

APM

Can save power during Suspend Mode

Supports APM 1.1 Specification

Full On Mode

Power Management

Support

Doze Mode

Standby Mode

Suspend Mode (Suspend to RAM)

Save to Disk

System Off Mode

VGA Display

Boot on simultaneous display while external monitor attached

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2-18

General Specifications

Table 2-18 BIOS Specifications (cont’d)

ITEM

Specification

Suspend (To RAM)

STR can be invoked by Hot-Key, Cover-Switch, Battery Low-Low

Condition, & Operating System request

STR can be resumed by Keyboard & Power button

Save To Disk

STD can be invoked by Hot-Key, Cover-Switch, Battery Low

condition & Operating System request

STD can be resumed by Power Button only.

MICRO-CONTROLLER FUNCTION DESCRIPTION

The following table lists Micro-Controller specifications.

Table 2-19 Micro-Controller Specifications

ITEM

SPECIFICATION

Y-Connector Support External PS/2 Mouse and External Keyboard can be used

LED Connector

Caps Lock and Scroll Lock Status should be kept during Suspend

Process.

Support AC-IN, Battery-Charging, Battery-Low, Suspend-To-RAM

Status LED

System Peripheral

Control

Support the Audio/Contrast/Brightness control

Support the Backlight control

SMI Signal

Edge Trigger (High Active)

Activity Events

Hot-Key Press

Battery Low & Battery Low-Low

Cover Switch =>

Enter into Suspend Mode or Turn off Backlight via CMOS Setup

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2-19

POWER MANAGEMENT FEATURES (MODE DEFINITION)

The following table lists power management specifications.

Table 2-20 Power Management Modes

Mode

Device

Speed

Full-On Mode

CPU State

Full speed

Normal

Peripherals State

Doze Mode

Timer

On / Off

CPU State

Stop Grant State

Slow Refresh

Normal

DRAM State

Peripherals State

Activity Events

Video Monitoring, Keystrokes,

FDD, HDD, COM1, COM2,

LPT2, Audio

Standby Mode

Timer

Off/1/2/4/8/16 Min.

Stop Clock

CPU State

DRAM State

VGA State

Audio State

AMP Circuit

HDD State

LCD state

Slow Refresh

Standby

Power Down

Backlight Off, Negative Volt.

Off

Video Monitoring, Keystrokes,

FDD, HDD, COM1, COM2,

LPT1, Audio

Activity Events

Suspend To RAM

Timer

Off/1/2/4/8/16 Min

Stop Clock

CPU State

DRAM State

LCD State

Slow Refresh

Backlight off, Negative Volt. Off

Power Down

VGA, HDD, I/O Chip, PCMCIA,

Audio, AMP Circuit, KBC, Clock

Generator

UM8890BN

Power-On Group

Activity Events

Keyboard, Power, Com1,

Fax/Modem, PCMCIA Ring

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2-20

General Specifications

Table 2-20 Power Management Modes

Mode

Device

Speed

Suspend To Disk

Timer

Off/1/2/4/8/16 Min

CPU State

Off

Power System

Power-On Group

Off

Micro-Controller

Activity Events

CPU State

Power Switch

CPU Clock/2

Battery Low

Condition

LCD State

Battery Low / Low

Condition

CPU State

Off

System Power

POWER MANAGEMENT FEATURES (MODE TRANSITION)

The following table lists power management transition modes.

Table 2-21 Mode Definitions

FROM/TO

FULLY-ON

DOZE

SLEEP

SUSPEND

Fully-On

Doze

Sleep

Suspend

1. Doze Mode Time-Out

APM CPU-Idle

2. APM Power Management Event: System Suspend Request Notification

Battery Low - Low Condition

Suspend Events Occurs

3. Fully-On Activity Events Occur

4. Sleep Mode Time-Out

5. Sleep Timer Disabled and Suspend Mode Time-Out

Battery Low - Low Condition

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General Specifications

2-21

6. Fully-On Activity Events Occur

7. Suspend Mode Time-Out

Battery Low - Low Condition

8. Resume Events Occur

HOT KEY DEFINITION

The following table lists hot key definitions.

Table 2-22 Hot Keys

FUNCTION KEY

CONTENT

Fn + Esc

Fn + F10

Fn + F11

Fn + F8

Suspend

LCD/CRT/SIMUL. Display

Panel Backlight On/Off

PC Speaker Only

Fn + right

Fn + left

Fn + PgUp

Fn + PgDn

Fn + up

Contrast Up

Contrast Down

Speaker Volume Increases

Speaker Volume Decreases

Brightness Increases

Brightness Decreases

Numeric Lock

Fn + down

Num

ENVIRONMENTAL SPECIFICATIONS

The following table lists appropriate operating temperatures.

Table 2-23 Environmental Specifications

SPECIFICATION

ITEM

5 ^oC ~ 35 ^oC (80%)

-20 ^oC ~ 60 ^oC (90%)

Operating Mode

Non-Operating

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2-22

General Specifications

POWER SOURCE SPECIFICATIONS

The following table lists system power specifications.

Table 2-24 Power Specifications

Input

Nominal

Version

AC Voltage

100 ~ 250 V

50 / 60 Hz

90 ~ 265 V

47 ~ 63 Hz

AC Frequency

VIBRATION SPECIFICATIONS

The following table lists vibration specifications.

Table 2-25 Vibration Specifications

MODE

ITEM

Operating Mode

Direction of Movement: X, Y, Z Axis

Vibration Level: 5 ~ 500 ~ 5 Hz, 0.5 Gs Acceleration

Duration Time: 60 min. for each axis

Non-Operating

Direction of Movement: X, Y, Z Axis

Vibration Level: 5 ~ 500 ~ 5 Hz 2 Gs Acceleration

Duration Time: 60 min. for each axis

SHOCK SPECIFICATIONS

The following table lists system shock specifications.

Table 2-26 Shock Specifications

MODE

ITEM

Operating Mode

Impact Accelerator: 1g/10g Based on Half Sine-Wave Shock

Pulses of 11 Msec

Number of Shock: 3 Shocks for each of the 6 faces

Direction of movement: 6 Faces

Non-Operating Mode Impact Accelerator: 10g, 20g, 30g, 40g, 50g Based on Half Sine-

Wave Shock Pulses of 11Msec

Number of Shock: 3 Shocks for each of the 6 faces

Direction of Movement: 6 Faces

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2-23

ELECTRO-STATIC DISCHARGE (ESD) SPECIFICATIONS

The following table lists static discharge specifications.

Table 2-27 Electro-Static Discharge Specifications

ITEM

SPECIFICATION

Contact Discharge

Air Discharge

HCP

±2, 4, 8, 12.5, 15 kV

±2, 4, 15 kV

±2, 4 kV

VCP

±2, 4 kV

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Section 3

Hardware Functional Overview

The NEC Versa 2500 Series notebooks consist of several major functions and subsystems

including:

system BIOS – implemented on the system board and Flash ROM

system processor – implemented on the system board

system logic controller – implemented on the I/O Board

memory subsystem – implemented on the system board

video subsystem – implemented on the I/O board, LED board, and LCD display

panel

I/O subsystem – implemented on the I/O board

keyboard subsystem – implemented on part of the system board, and keyboard as-

sembly

PCMCIA controller and sockets – implemented on the system board

pointing device subsystem – implemented on the I/O board and keyboard assem-

bly

hard disk subsystem – implemented on the system board and the hard drive as-

sembly

floppy disk subsystem – implemented on the system board and the diskette drive

CD-ROM subsystem – implemented on the system board and the CD-ROM

reader

power subsystem – implemented on the power supply board, inverter board, bat-

tery packs, and AC adapter

A simplified block diagram of the notebook is shown on the next page.

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3-2

Hardware Functional Overview

FUNCTIONAL BLOCK DIAGRAM

The following figure shows the NEC Versa 2500 Series functional diagram.

FLASH BIOS

256KB

CARD 0

PCMCIA

OMEGA

82C094

Bank 0

8MB

(on-board)

CARD 1

GLIDE PAD

EXT. KB/MOUSE

INTERNAL KB

CORE CHIP

UMC

UM8891BF-N,

UM8892BF-N,

UM8886BF-N

Bank 1

8, 16MB

(DIMM)

CONTROLLER

MITSUBISHI

M38813M4

Cache RAM

L2: 256 KB

write back

COM1

PRINTER

HDD

Pentium

P54CSLM-

133MHz

SUPER I/O

NS PC87336VLJ

VGA CHIP

C&T 65548

VIDEO RAM

1MB

FDD

LLM

INVERTER

CRT ON

+3.45V

AC or DC

ADAPTER

+5V

DC/DC

CONVERTER

66MHz

+12V

CLOCK GEN

ICS

AV9154-43

14.318MHz X'TAL

24MHz

Battery IN

BATTERY IN

14.318MHz

Figure 3-1 Functional Block Diagram

SYSTEM BIOS

The primary function of the system BIOS (Basic Input-Output System) is to provide a se-

ries of software interrupts, functions, and sub-functions that control operations on certain

devices, such as the hard disk drive, the floppy drive, and the video subsystem.

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Hardware Functional Overview

3-3

The NEC Versa 2500 Series uses the Phoenix BIOS. The BIOS Setup program is an easy-

to-use system utility configuration that sets system parameters and copies them on the Flash

ROM chip with the system BIOS.

The Flash ROM chip also includes BIOS Power-On Self Test (POST) diagnostic and boot-

ing codes that tests the system components, initializes certain data structures, and boots the

operating system.

System Processor

The system processor function for the notebook is implemented on the system board using

an Intel P54CSLM-133 MHz processor chip. The processor operates in conjunction with

the RAM and ROM memory plus other system control logic (e.g. UMC 8486F) to process

software instructions (BIOS, Windows, applications).

The Intel P54CSLM microprocessor is a high performance 586-class CPU which is com-

patible with all the popular x86 operating systems including DOS, Windows, Windows NT,

Windows 95, UNIX, Novell, and OS/2. The super pipelined architecture of the integer unit

combined with single cycle execution, branch prediction, 16-Kbyte write-back cache, and

single cycle instruction decode results in true 586-class performance. These features result

in a 60 to 90 percent gain in processing speed compared to the Cyrix 486DX2-50.

Additionally, the P54CSLM CPU provides many power savings features making it ideal for

power sensitive systems like notebook computers. Aside from operating at 3.45V only, the

CPU clock can also be completely stopped. Moreover, the CPU automatically powers down

the FPU and other internal circuits when not in use. Fast entry and exit from the SMM

mode allows frequent use of the SMM feature without noticeable performance degradation.

Major Functional Blocks

The Intel P54CSLM, in a 320-pin TCP packaging, is divided into five major functional

blocks:

Integer Unit

Floating Point Unit

Cache Unit

Memory Management Unit

Bus Interface Unit

Instructions are executed in the Integer Unit pipeline and in the Floating Point Unit (FPU).

The Cache Unit stores the most recently used data and instructions and provides fast access

to this information for the Integer and Floating Point Units.

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3-4

Hardware Functional Overview

When external memory access is required, the physical address is calculated by the Memory

Management Unit and then passed to the Bus Interface Unit (BIU). The BIU provides the

interface between the external system board and the processor’s internal execution and

cache units.

SYSTEM LOGIC CONTROLLER

The System Logic Controller function for the notebook is implemented on the system board

using UMC 8890 Series Notebook Chipset. The UM8890 is an advanced 586 compatible

single chip specially designed for notebook computers and other portable computers. Aside

from supporting almost all 586-based CPUs, the UM8890 also integrates PMU, System

Controller, RTC and Peripheral Controller (206) into a single 208 QFP package.

Features Summary:

System

Fully compatible with IBM PC/AT

Supports PCI Bus-Master mode

System Operation Voltage from 3V to 5.5V

Three programmable non cacheable regions

Flash ROM Boot block erase protection

Supports general purpose I/O

Hybrid Voltage

208 Pins QFP

Integration

Built-in 206

Built-in 146818A

Built-in Memory Controller

Memory Controller

Supports ROM DOS up to 64 MB by XIP, 16 MB by EMS

Supports Shadow RAM from C0000-FFFFF

Supports Slow and Self Refresh DRAM

Supports Stagger Refresh

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Hardware Functional Overview

3-5

On-board Memory up to 48 MB

Supports Three Memory Banks

Supports Page Mode/Burst Mode Operation

Supports 512KBx8, 1Mx4, 1Mx16, 2Mx8 and 4Mx4 type DRAM

Supports 8 or 16 bit ROM configuration

Programmable DRAM timing for each bank

Power Management

Supports up to Ten Programmable PMC Outputs

Supports Multiple Power Saving Mode

All Register Read/Writeable for 0V SUSPEND

Microsoft APM Compatible

Supports 0V SUSPEND

Demand Driven Clock Control

Supports Resume/Suspend

Auto-Wake Up Function

Three Low Battery Monitor Input

System Operating Voltage from 3V to 5.5V

Low Power Consumption (at 3.3V)

* 50mA at Full On Mode

* 25mA at Doze Mode

* 100uA at Suspend Mode

* 15uA at Power Off Mode with RTC Active

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3-6

Hardware Functional Overview

MEMORY SUBSYSTEM

The memory subsystem, implemented on the system board, includes ROM and DRAM

memory. Primary control for the memory subsystem is provided by the UMC 8890 System

Controller chipset.

DRAM Memory

The NEC Versa 2500 notebooks contain 16 MB of 70ns page-interleaved DRAM on the

system board. The notebook provides one extra memory slot for upgrading the DRAM

memory to 8 MB, 16 MB, 24 MB, 32 MB, 40 MB, & 48 MB using standard JEDEC or

EDO small-outline DIMM memory modules. (Refer to Chapter 1 on System Upgrades to

know more about how to upgrade the system memory).

ROM Memory

The NEC Versa 2500 Series notebooks contains both the main system BIOS and the VGA

BIOS with Shadow BIOS capability.

I/O SUBSYSTEM

The I/O Subsystem of the notebook is implemented on the I/O Board using the NS

PC87336VLJ chipset. The supported I/O interface on the notebook includes the internal

hard disk drive interface, the internal floppy disk drive interface, the external printer port

interface, the external serial port, and the external PS/2 keyboard and mouse ports.

Feature’s summary of the NC87336VLJ:

Compatible with IBM AT architecture

Supports up to two 360K, 720K, 1.2M, or 1.44 MB floppy disk drives

Supports IBM PC/AT interface to IDE (Intelligent Drive Electronics)-type Win-

chester drives

Hardware or software configuration

Address decoding and strobe generator for game port

Supports two serial port functions

Supports one bi-directional IBM PS/2 compatible parallel port function

All functions can be enabled or disabled individually

Configuration Register can be easily selected

Only one 24 MHz crystal needed

100-pin plastic flat package

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Hardware Functional Overview

3-7

VIDEO SUBSYSTEM

The video subsystem, implemented on the system board and on the LCD Panel, controls the

display output to both the LED Panel and to the external VGA port.

The video subsystem utilizes the C&T 65548 High Performance Flat Panel / CRT VGA

Controller. It also includes 1 MB DRAM memory, 32-bit DRAM bus, and separate display

and memory clocks. An additional frame buffer/accelerator DRAM increases the available

memory bandwidth for CPU accesses.

Video Chipset Controller

The C&T 65548 initiates a family of 208-pin, high performance for the full-featured note-

book that requires the highest graphics performance available. The 65548 achieves superior

performance through direct connection to system processor buses up to 32-bits in width.

When combined with the CHIPS’ advanced linear acceleration software driver technology,

this device exhibits exceptional performance compared with devices of similar architecture.

The 65548 also adds a sophisticated 32-bit graphics hardware engine for the Bit Block

Transfer (BITBLT), line drawing, hardware cursor, and other functions intensively used in

Graphical User Interface (GUIs) such as Microsoft Windows.

Features Summary:

Highly integrated design (flat panel/CRT VGA controller, RAMDAC, clock syn-

thesizer)

Multiple Bus Architecture Integrated Interface

Local Bus (32-bit CPU Direct and VL)

EISA/ISA (PC/AT) Bus

PCI Bus

Flexible display memory configurations

Two 256K x16 DRAMs (1 MB)

Integrated programmable linear address feature accelerates GUI performance

Hardware windows acceleration (65548)

32-bit graphics engine

System-to-screen and screen-to-screen BitBlt

3 operand ROP’s

Color expansion

Optimized for Windows BitBlt format

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3-8

Hardware Functional Overview

Hardware line drawing

64x64x2 hardware cursor

High performance resulting from zero wait-state writes (write buffer) and mini-

mum wait-state reads (internal asynchronous FIFO design)

Supports panel resolutions up to 800x600

Supports non-interlaced CRT monitors with resolutions up to 1024x768 at 256

colors

True-color and Hi-color display capability with flat panels and CRT monitors up

to 800x600 resolution

Advanced power management features minimize power consumption during:

Normal operation

Standby (Sleep) modes

Panel-Off Power-Saving Mode

Power Sequencing control outputs regulate application of Bias voltage, +5V to

the panel and +12V to the inverter for backlight operation

Fully compatible with IBM VGA

EIAJ-standard 208-pin plastic flat pack

External VGA Capability

The NEC Versa 2500 Series notebooks provide a 15-pin female D-type external VGA con-

nector that can be connected to an external video graphics adapter (VGA) type monitor.

Another feature of the notebook computer is the ability to auto-sense the display output to

both LCD and the external CRT monitor. The notebook provides external resolution of

1024x768 by 256 colors for the NEC Versa 2500 series with 1 MB video memory. The

NEC Versa 2500 Series can also provide simultaneous display at 800x600 at 256 colors

with the standard VGA DSTN LCD.

KEYBOARD SUBSYSTEM

The Keyboard Subsystem of the notebook is implemented on the I/O Board and Keyboard

Assembly using the Motorola M 38813M4 keyboard controller chip.

The NEC Versa 2500 Series keyboard is an 87/88-key, IBM enhanced-type keyboard with

standard characters and function keys plus 12 programmable function keys. The notebook

also provides an external PS/2 port for supporting an external PS/2 keyboard or standard

DIN-type AT-keyboard. See Section 1 for more information.

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Hardware Functional Overview

3-9

PCMCIA CONTROLLER AND SOCKETS

The PCMCIA controller is implemented on the system board using Omega’s 82C094 Inter-

face Controller. The 82C094 is compatible with the Intel i882092AA PCI to PCMCIA

controller chip. It supports two independent 68 pin PC card sockets and is register com-

patible with Intel’s 82365SL.

The NEC Versa 2500 Series notebook provides PCMCIA slots that support two Type I, or

Type II cards at the same time. or one Type III card on the upper slot and one Type I or II

card on the bottom slot.

Feature summary of the Omega 82C094:

PC Card 95, PCMCIA 2.1, and JEIDA 4.1 compatible Interface

Power Management Function that includes Individual Socket power control, Hot

insertion/removal, Hardware/Software controlled power down, Modem Ring in

Resume, CS Controlled Power Down, and Power Saving with Windows inactivity

Direct connection to 33 MHz PCI bus and to PCMCIA sockets without glue logic

Serial Power Control to support the designs with most PCMCIA power switch IC

Legacy DMA and serial IRQ to directly support advanced PCI Core Logic

Single-Chip PCMCIA host controller

Supports CLOCKRUN# of the PCI Mobile Design Guide for power saving

Intelligent power management for lowest operating power

Programmable power management with individual socket activity counter

Four-level FIFO and programmable PCMCIA interface timing

Five programmable memory windows and two programmable I/O windows per

socket

Intel EXCA register compatible

208 Pin PQFP or TQFP

HARD DISK SUBSYSTEM

The hard disk subsystem, implemented on the system board and on the associated built-in

hard disk drive, provides disk storage for all system software and user files.

The NEC Versa 2500 Series notebook is equipped with a high capacity 1.4 GB hard disk

drive that provides LBA (Logical Block Addressing) mode support. The I/O subsystem

controller, NS PC87336CLJ, provides the IDE controller for the hard disk.

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Hardware Functional Overview

The built-in controller can support any industry standard 2.5-inch IDE hard disk drive at

19mm or 17mm height. Setting up the hard disk type is done automatically by the CMOS

Setup program. Setup auto-detects the installed hard disk type settings for optimized per-

formance.

NOTE: Do not move the notebook when the

HDD LED is activated. This protects the hard

disk drive from any accidental damage or loss of

data.

DISKETTE DRIVE SUBSYSTEM

The Diskette Drive Subsystem consists of a FDD controller provided by SMC 37C665IR

and the built-in floppy disk drive. The floppy disk drive supports standard

720KB and 1.44 MB mini-diskettes.

3.5-inch

POINTING DEVICE SUBSYSTEM

The pointing device subsystem consists of the VersaGlide device on the system top cover

assembly, and a pre-programmed Mitsubishi M38813M4 micro-controller that interfaces the

mouse device to the system board. An external PS/2 port also supports the use of an exter-

nal PS/2 compatible mouse which the system automatically detects during system power up

and then disables the internal VersaGlide.

POWER SUBSYSTEM

The Power Subsystem consists of the following major sections:

External AC Power Adapter

Internal Battery Pack

Power Board (on system board)

LCD Inverter Board (in LCD Panel Assembly)

Power Conservation Logic (part of system board)

AC Power Adapter

The computer is equipped with a universal AC power adapter that converts AC voltage (90

to 265VAC, 47 to 63Hz) into DC voltage used to operate the notebook and charge the

batteries.

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Hardware Functional Overview

3-11

Internal Battery Pack

The NEC Versa 2500 Series notebooks utilizes NiMH (Nickel Metal-Hydride) that pro-

vides DC power for the notebook

The battery pack contains ten size A battery cells that provide the system with 12V. When

installed in the notebook, the battery LED automatically appears and will also start to re-

charge whenever the AC adapter is connected to the notebook.

Normal charging time for the battery pack is around 1.5 hours when the computer is turned

off while it should take around 6 hours maximum when the computer is running.

Power Board

The power board receives approximately 12VDC from the battery pack and uses this input

voltage to generate +12V, +5V, +3.3V, (+3.45V) regulated output voltages to provide

power for all internal notebook board assemblies. The output of the +5V regulator also

drives the LCD inverter circuit on the LCD inverter board assembly. Refer to Chapter 2 for

more detailed information.

LCD Inverter Board Assembly

The LCD Inverter Board Assembly, located in the LCD Panel Assembly, converts the

+5VDC input from the Power Board module of the system board into a high voltage AC

output used to light the CCFT (Cold-Cathode Fluorescent Tube).

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Section 4

Field Service Guidelines

This section contains preventive and corrective maintenance procedures for the NEC Versa

2500 Series notebook computers. The first part of this section describes the computer

cleaning procedures and preferred handling procedures for sensitive components (i.e., disk

drives, batteries).

The second part of this section identifies all field replaceable parts plus the removal and re-

placement procedures for these parts.

PREVENTIVE MAINTENANCE

Preventive maintenance is limited to cleaning the plastic case, the keyboard, the display

screen, and the diskette drive heads as required.

NOTE: Remove the battery and disconnect the

AC adapter before performing any maintenance.

Voltage will be present inside the system unit and

LCD even after the system has been turned off.

Cleaning the Notebook’s Exterior

Use the steps described below to clean the outer surface of the system.

1. Power off the system, remove the primary battery pack, and unplug all cables

connected to the system.

2. Wipe the outside of the system unit, keyboard, and display with a soft, clean cloth.

Remove any stains with water only. Use glass cleaner to clean the LCD indicator

panel. Apply the glass cleaner directly to the cloth and then wipe the LCD indica-

tor panel. Do not use solvents or strong, abrasive cleaners on any part of the sys-

tem.

3. Clean the keys with a damp cloth. A small, soft-bristle brush may be used to clean

between the keys. Make sure to use a damp cloth (not wet) to prevent moisture

from seeping between the keyboard and the metal plate, this could possibly dam-

age the components under the keys. If the keyboard gets wet, thoroughly dry it

before reassembling the system unit.

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Field Service Guidelines

Cleaning the Notebook’s Interior

When servicing the inside of the notebook to remove dust and other foreign particles pro-

ceed as follows:

1. Remove the top cover, hinge covers, status bar, and keyboard using the disas-

sembly procedures discussed later.

2. Dust or vacuum (with a rubber-tipped nozzle) the inside of the system unit, par-

ticularly the system board surface. Use care to avoid damaging or dislodging any

components or cables.

3. Inspect all cable connectors for damage. Ensure that all connectors are seated

properly before replacing the cover.

Protecting the Disk Drives

To protect the disk drives and data, we recommend that you back up the system disk peri-

odically on diskettes. Occasionally use a head-cleaning diskette in the diskette drive to pro-

long the life of the drive and to help maintain data integrity.

Here are some preventive maintenance tips that we recommend you use when handling the

hard disk:

Periodically back up the data files from the hard disk.

Run a virus detection program to identify possible viruses on the hard disk.

Use SCANDISK to correct any errors found in the directory and File Allocation

Table (FAT). This will also free up space from any unused sectors.

Never turn the computer off when the hard disk is being accessed.

Never move or raise the computer while the hard disk is being accessed, impor-

tantly don't jar the hard disk, as this may cause a hard disk crash.

Use hard disk maintenance programs like DEFRAG under DOS or Norton Utili-

ties SPEEDISK to reorganize your hard disk by eliminating fragmentation and

improving hard disk access time.

Handling the Computer Battery Packs

The battery packs furnished with the computer require reasonable care and handling to en-

sure efficient operation and maximum life. Periodically inspect the battery terminals and the

batteries for evidence of corrosion and/or oxide build-up.

To ensure that the battery packs endure a normal life cycle, always observe the following

precautions when handling the battery packs:

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Field Service Guidelines

4-3

Do not drop the battery packs or subject them to excessive shock and vibration.

Do not expose the battery packs to direct sunlight, moisture, or chemical com-

pounds.

Do not disassemble the battery packs.

Do not use the battery packs to power other devices.

Do not short the battery leads or connect the battery with reversed polarity.

Never attempt to charge the battery packs in any way other than as described in

this manual and the user’s guide.

Always charge the battery packs as soon as possible after a low battery indication.

Maintaining the LCD Quality

Heat is the most common problem associated with the screen. After a lengthy work session,

the typical routine is to shut down the machine and close the cover, but the display surface

(no matter what type it is) and the components inside the computer radiate heat. So, when

you close the cover, you will then trap this heat up against the screen. Leaving the computer

cover open for about ten minutes while the heat disperses eliminates this potentially damag-

ing situation.

REQUIRED TOOLS AND EQUIPMENT

All NEC Versa 2500 Series corrective maintenance procedures can be performed using the

following tools:

tweezers

small flat-blade screwdriver

small Phillips screwdriver

small Hex-bolt screwdriver.

NOTE: All boards, options and peripherals

contain components that are sensitive to static

electricity. When handling any of these items,

protect against static discharge by using wrist or

ankle grounding straps and grounded working

mats. When moving or storing items, use the

anti-static bags supplied with the items.

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4-4

Field Service Guidelines

PARTS REMOVAL AND REPLACEMENT PROCEDURES

This section contains field service-level removal/replacement procedures for the notebook.

Refer to the exploded diagram later in this section to identify all relevant parts. The NEC

Versa notebook is designed for optimum modularity in order to make field replacement

maintenance easy and efficient.

Removing/Replacing the Notebook Battery Pack

The procedure for removing and replacing the battery pack is as follows:

1. Turn off the computer. Close the LCD cover and turn the whole unit over.

2. You will find a clamp latch (lock knob) that is securing the internal battery pack

to the system unit. To remove the battery pack, push the lock knob sideways with

one hand and with the other hand pull the battery pack out. Note that this has to

be done simultaneously.

3. To replace the battery pack again, simply slide the battery pack into the system

unit until you hear the spring latch hook snap into place. The battery pack can

only be inserted in one direction so there is no danger of improper insertion.

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Field Service Guidelines

4-5

Removing/Replacing the Hard Disk Drive Module

The procedure for removing and replacing the hard disk drive module is as follows:

1. Turn off the computer. Close the LCD cover and turn the whole unit over.

2. You will find a clamp latch (lock knob) that secures the hard disk drive module to

the system unit. To remove the hard disk drive module, push the lock knob side-

ways with one hand and with the other hand pull the hard disk drive module out.

Note that this has to be done simultaneously.

3. To replace the hard disk drive, remove the four flat screws attaching it to the null

hard disk assembly and remove the hard disk drive cable.

4. To replace the hard disk drive module, reverse the above procedure.

Figure 4-1 Hard Drive Module Assembly

Removing/Replacing the Diskette Drive Module

The procedure for removing and replacing the diskette drive is as follows:

1. Turn off the computer. Close the LCD cover and turn the whole unit over.

2. You will find a clamp latch (lock knob) that secures the diskette drive module to

the system unit. To remove the diskette drive module, push the lock knob side-

ways with one hand and with the other hand pull the diskette drive module out.

Note that this has to be done simultaneously.

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Field Service Guidelines

3. To replace the diskette drive, remove the four flat screws attaching it to the null

diskette assembly , two attaching the diskette cover and remove the diskette drive

cable.

4. To replace the diskette drive unit, remove the four small screws attaching it to the

null diskette drive assembly and remove the diskette drive cable.

5. To replace the diskette drive module, reverse the above procedure.

Figure 4-2 Diskette Drive Module Assembly

Removing/Replacing the LCD Status Bar Cover and Hinges

Remove the LCD Status Bar Cover and Hinge Covers are as follows:

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. Slide the left and right hinge covers out to remove them.

3. Lift the status bar cover out.

4. To replace the LCD Status Cover and Hinge Covers, reverse the removal proce-

dures mentioned above.

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4-7

Removing/Replacing the Keyboard

The procedure for removing and replacing the keyboard is as follows:

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. Lift the keyboard out and tilt the upper edge of the keyboard towards you, but do

not lift the keyboard away. Rest the keyboard (face down) on the palm rest area.

3. Remove the keyboard cable from the system board’s FPC type connector. To re-

lease the keyboard cable from the connector, gently lift (using your fingernail or a

thin pointed object) the connector locks on the left and right edge. Pull the key-

board cable out and remove the keyboard from the notebook.

4. To replace the keyboard; rest the keyboard face-down on the palm rest area. In-

sert the keyboard cable into the FPC type connector on the system board and tilt

the keyboard back into place.

Removing/Replacing the Heat Plate

This is a heat shield for the CPU and power board. Remember, the CPU is in contact with

this part, so be careful when removing it from the unit.

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. Remove the six screws and carefully lift the heat pipe from the unit. (You do not

need to remove this part if you are removing/replacing the LCD).

WARNING: The CPU is sometimes attached to

the heat pipe, so be careful not to damage the

pins or the CPU may be inoperable.

Removing/Replacing the CPU

The procedure for removing the CPU is as follows:

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. The CPU is located at the left rear of the system base assembly under the heat

pipe. The system board has been designed to allow the heat generated by the CPU

to be released from the system.

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Field Service Guidelines

3. Slowly remove the CPU, moving around each side, little by little. Avoid damaging

the CPU pins by forcing the CPU out of its slot immediately. Also, do not pull out

the CPU heat sink as it is part of the CPU. You must remove the CPU and the

heat sink together.

4. To replace the CPU, align it with pin 1 of the socket and plug in the CPU. Make

sure that the CPU pins are straight before inserting it. Broken or damage pins on

the CPU may totally damage the CPU. To remount the CPU, reverse the disas-

sembly procedure mentioned above.

You do not need to remove this part if you are removing/replacing the LCD.

Note: It is not necessary to remove the CPU

when performing normal service on the Versa

2500 Series.

Removing/Replacing the Cover-Display LCD Assembly Module

The procedure for removing the Cover-Display LCD Assembly Module is as follows:

1. Turn off the computer. Follow all disassembly procedures for removing the hinge

covers, status bar cover, and keyboard as mentioned earlier in this section.

2. Remove the center screw on both hinge mounts, the grounding screw to the left

of the connector on the LED Board assembly, and remove the connector from the

LED board.

3. Lift the Cover-Display LCD Assembly Module from off of the unit and set aside.

4. To remount the Cover-Display LCD Assembly Module, reverse the disassembly

procedure mentioned above.

Removing/Replacing the System Top Cover Assembly and the NEC

VersaGlide Assembly

The procedure for removing and replacing the system top cover assembly and VersaGlide is

as follows:

NOTE: If you plan to continue remov-

ing/replacing modules from the notebook you

must follow all of the disassembly procedures

mentioned from the start of this section.

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Field Service Guidelines

4-9

1. Turn off the computer and remove the Battery, Hard Disk Drive, and Diskette

Drive Modules. Follow all disassembly procedures mentioned from the start of

this section.

2. Turn the System Unit upside down with the bottom facing up. Remove the nine

screws securing the base unit assembly from the top unit assembly.

3. Return the back to the normal position. Remove the screw located between the

hinges above the LEDs. Next remove the screw located just under the speaker on

the left side, the screw just to the right of the LEDs and the screw located to the

right of the LCD cable connector. Lift the top cover from the base cover. Note,

that the LCD, speaker, and the VersaGlide cables are all still attached to the sys-

tem board. Pull these cables out and remove the whole top cover assembly.

4. The VersaGlide module is assembled to the system top cover case. Turn the top

cover case over and locate the VersaGlide printed circuit board. Remove the six

screws securing the module and remove the VersaGlide assembly.

5. To replace the whole top case assembly, reverse the removal procedures men-

tioned above. We recommend that you remove the top cover screws first, then the

bottom cover screws. Make sure to test the VersaGlide before entirely securing it

to the top cover case.

6. You do not need to remove the CPU unless you are going to replace it.

Removing/Replacing the LED Board

The procedure for removing the LED board is as follows:

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. The LED Board is located in the center rear of the system base unit. This board

alerts you to the processes presently in use on the computer.

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4-10

Field Service Guidelines

3. Remove the two screws and lift the board carefully out of the connections to the

system board.

Figure 4-3 The LED Board Module Assembly

Removing/Replacing the System Board and I/O Board

The system board and the I/O board are assembled together as one unit and must be re-

moved from the base unit before being separated from each other. The procedure for re-

moving the system board and I/O board is as follows:

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. Remove the two large posts from the center of the system board and the two

screws from the lower leg of the I/O Board.

3. From the back of the unit remove the six spacers and two screws around the four

plug-in connectors.

4. Since the system board is the main unit of the notebook, all of the other boards

are connected to this electronic module either by connector or by cable. Special

care should be taken when removing this module, so as not to damage any of

these connectors and/or cables.

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Field Service Guidelines

4-11

Figure 4-4 The System Board and I/O Boards

Separating the System Board and I/O Board

The system board is attached directly to the I/O board. The following procedure should be

taken to separate the two boards:

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. Remove the four medium spacers located along the top and left side edge and the

one screw located at the center bottom of the system board.

3. Slowly separate the I/O Board and system board, being cautious about the con-

nectors coupling the two boards together.

4. To reattach the I/O Board and system board, reverse the separation procedures

mentioned above.

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Field Service Guidelines

Figure 4-5 The I/O Board Module Assembly

Removing/Replacing the Power Board

The procedure for removing the power board is as follows:

1. Turn off the computer. Follow all disassembly procedures mentioned from the

start of this section.

2. Remove the two hex spacers from the center of the board and lift the module from

the unit.

3. To replace the power board module, reverse the removal procedures mentioned

above.

Figure 4-6 Power Board Module Assembly

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Field Service Guidelines

4-13

ILLUSTRATED PARTS BREAKDOWN

This section contains the illustrated parts breakdown (IPB) and NEC part numbers for the

NEC Versa 2500 Series computer. Table 4-1 lists field-replaceable parts and corresponding

part numbers. Figure 4-7 shows the field-replaceable parts for the docking station.

Table 4-1 NEC Versa 2500 Series Field-Replaceable Parts*

Item

Description

Part Number

Main Battery (NiMH)

TEAC CD-ROM Assembly

AC Adapter

21-90128-31

25-00372-00

12-00118-30

22-30046-00

21-90210-02

51-70187-10

51-70185-11

24-40827-00

71-30335-00

22-20296-00

25-41141-00

24-40836-00

71-10480-00

12-00146-00

24-40819-01

AC Power Cord

CMOS Battery

DC/DC Board Assembly

VersaGlide Assembly

Cover, Left Hinge

U.S. Keyboard

LCD Cable Assembly, 12.1”

NEC Model Nameplate, NEC Versa 2500

LCD Front Panel Assembly, 12.1”

LCD, Hitachi, 12.1”

LCD Inverter

LCD Rear Cover, 12.1”

NEC Logo

25-41140-00

24-40828-00

Cover, Right Hinge

Status Cover

24-408822-00

24-40821-00

51-90032-10

24-50204-00

Top Cover Assembly

CPU, Pentium, 133 MHz

I/O Port Bracket

Audio Cover

24-40826-00

51-70184-00

51-70182-21

51-70183-30

LED Board Assembly

System Board

I/O Board

____________

This data was prepared January, 1997. For an up-to-date listing of spare parts, please call FastFacts

(800) 366-0476 and order document number 42200191.

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Field Service Guidelines

Table 4-1 NEC Versa 2500 Series Field-Replaceable Parts (cont’d)*

Item

Description

Part Number

I/O Cover

24-40794-10

25-00371-00

25-00239-00

24-40810-10

24-80631-10

24-40793-10

24-50227-00

02-30109-00

02-30110-00

24-40795-10

56-10076-00

1.4 GB Hard Disk Drive Assembly

Diskette Drive Assembly

ROM Door

Rubber Foot

Bottom Cover Assembly

Keyboard Bracket

32*

33*

34*

35*

36*

8MB Memory Module (EDO)

16MB Memory Module (EDO)

Docking Door

LCD Assembly, DSTN 12.1”

Not shown in IPB figure.

____________

This data was prepared January, 1997. For an up-to-date listing of spare parts, please call FastFacts

(800) 366-0476 and order document number 42200191.

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Field Service Guidelines

4-15

Figure 4-7 NEC Versa 2500 Series Illustrated Parts Breakdown

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4-16

Field Service Guidelines

Packaging and Documentation

Packaging and documentation part numbers are listed in Table 4-2.

Table 4-2 Packaging and Documentation Part Numbers

Description

Model Number

NEC Versa 2500 Series User’s Guide

25-10584-00

NEC Versa 2500 Series Service and

Reference Manual (this guide)

819-200191-000 Rev. 00

Shipping Carton (1 set)

25-20571-02

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Section 5

Troubleshooting and Repair

This section focuses on providing you with some information on notebook basic trouble-

shooting as well as the BIOS POST error codes and messages.

SERVICE INFORMATION

NEC service and information telephone numbers are listed in the following table.

Table 5-1 NEC Service and Information Telephone Numbers

Service

To order NEC spare parts

To order options in the U.S.

Call

In the U.S., call 1(800) 632-4525

Local Sales Office

To access the NEC Electronic Bulletin Board 1(508) 635-4706

System (BBS)

To download files - provides software drivers 1(508) 635-4706

and the latest ROM BIOS

NEC Service

In the U.S., call 1(800) 632-4525

Listen to the automated attendant and select the appropriate menu to reach one of

the following departments:

Information Center - literature, dealer locations, sales leads, response to ads

NSRC (National Service Response Center) - questions other than products,

spare parts or technical support

Service Contracts

TSC (Technical Support Center) - technical support for everyone else

FastFacts^TM- automated service that sends

In the U.S. and Canada, call 1(800) 366-

the latest information about NEC products to 0476

the fax machine 24 hours a day

Outside U.S.,

Canadian Inquiries

Technical Support

1(416) 795-3554

1-800-632-4525

TECHNICAL SUPPORT

NEC Technologies Technical Support Center (TSC) provides an E-mail service for Internet

users besides the support listed in Table 5-1. Technical questions regarding NEC products

can be sent over the Internet system to TSC. The Internet address is as follows:

[email protected]

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5-2

Troubleshooting and Repair

If it is more convenient, questions may also be faxed to TSC. The TSC fax number is:

(508) 635-4666

Along with the complete product name and question(s), be sure to included your name and

fax number or Internet address, so that an expert can respond to your question(s).

It would also be helpful to include your telephone number in case TSC can not get their an-

swer to you through the Internet or by fax. TSC replies to all questions received by Internet

or fax within one business day.

PRODUCT INFORMATION

NEC FastFacts is an automated electronic information service used to obtain up-to-date

product application notes, installation procedures, troubleshooting tips, data sheets, techni-

cal information bulletins, price lists, and other information.

Information can be obtained from the FastFacts service 24 hours a day, 7 days a week. Us-

ing a touch-tone telephone, call the FastFacts number, order the desired information

through the automated attendant, and FastFacts will automatically send the information to

you.

Catalogs are available that list all of the documents and the document numbers. Current

catalogs include:

Catalog 1 - Monitors, Graphics Boards, and Data Projector Products

Catalog 2 - CD-ROM Hardware and Software, Printers, and Disk Drive Products

Catalog 3 - Laptop, Desktop, and Server Computer Products

Catalog 9 - Price and Configuration Index

Ordering Information from FastFacts

Order information from FastFacts as follows:

1. Check that the fax machine is on.

2. Locate the document part number.

3. Using a touch-tone telephone, call 1-800-366-0476 (U.S. and Canada only).

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Troubleshooting and Repair

5-3

For international; enter the international long distance access number, the U.S.

telephone number, or the U.S. extension (01-630-775-7999).

4. Listen to the instructions provided by the automated attendant.

Press 1 to skip the FastFacts introduction and jump to the automated instructions

for ordering a document or catalog.

Press 2 for an introduction to FastFacts, followed by the automated instructions

for ordering a document or catalog.

5. When asked by the automated attendant, enter your fax number and telephone

number.

For international; first enter the international long distance access number (011),

your country code, area or city code, and then your fax number.

The information requested is automatically sent to your fax machine. If FastFacts

attempts to send the second order before the first order is completed, the order

may be canceled. After three tries, FastFacts assumes that the line is busy and

does not process the order.

HELPFUL STARTERS

Here are some helpful items to check before troubleshooting the notebook:

Is there any external power source connected to the computer?

Has the battery been fully charged?

Is the computer turned on and the POWER LED activated?

Is the LCD display control switch moved to its minimum level?

Is the LCD display switched to the external monitor?

Are all cables and devices connected properly and securely?

Have all needed device drivers been installed properly?

Have you checked the AUTOEXEC.BAT and CONFIG.SYS files for errors?

Is the Suspend Mode activated LED Status Bar? Press any key or press the power

switch to wake up the system again.

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Troubleshooting and Repair

POWER-ON SELF TEST (POST)

This section provides you with the Phoenix BIOS POST errors and messages summary.

Refer to this whenever you encounter error messages or beep codes generated by the com-

puter during startup.

POST Messages

The following is a summary of the Phoenix BIOS startup error messages that are displayed

on the notebook’s display. These messages will help you to understand many of the note-

book’s problems that may be corrected by entering the CMOS SETUP program and

checking the original values.

Table 5-2 POST Error Messages

Message

Possible Cause

Action

Diskette drive A failure

The drive failed or is

missing.

Check the drive to determine

the problem.

Diskette read failure -

The diskette is either not

formatted or is defective.

Replace the diskette with a

bootable diskette and retry.

press

to retry boot,

for SETUP utility

No display message,

system will beep when

adapter fails,

The primary video adapter Check the primary video

failed. adapter.

Gate A20 failure

The keyboard controller is Check the keyboard

not accepting command,

specifically, the enable

and disable A20

controller and system board.

Turn the power off, then back

on again. If the problem

persists contact qualified

NEC service personnel.

command.

Fixed disk configuration

error

The specified

Correct the fixed disk

configuration.

configuration is not

supported or doesn't

match the actual hardware

installed.

Fixed disk controller

failure

The fixed disk may be

defective.

Try rebooting. If that doesn't

work, replace the fixed disk.

Fixed disk read failure-

The fixed disk may be

Check the drive type selected

press

to retry boot,

configured incorrectly or is in SETUP. Try rebooting. If

for SETUP utility

defective.

that does not work, replace

the fixed disk.

Pointer device failure

The PS/2-style mouse

failed.

Try rebooting. If problem

persists, check the mouse,

it's cable and connector.

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Troubleshooting and Repair

5-5

Table 5-2 POST Error Messages (cont’d)

Message

Possible Cause

Action

No boot device available - Either diskette drive A:,

F1 F2

Try rebooting. If problem

persists, replace the diskette

press

to retry boot,

the fixed disk, or both the

for SETUP utility

diskette and fixed disk are or the fixed disk.

defective.

No boot sector on fixed

The C: drive is not

formatted or is not

bootable.

Format the C: drive and

make it bootable.

disk - press

to retry

for SETUP utility

boot,

Not a boot diskette - press The diskette in drive A: is

Replace the diskette with a

bootable diskette and try

rebooting.

to retry boot,

SETUP utility

for

not formatted as a

bootable diskette.

No timer tick interrupt

Shutdown failure

The timer chip has failed.

Check the system board,

Turn the power off, then back

on again. If the problem

persists, contact qualified

service personnel.

Either the keyboard

Check the keyboard

controller is not accepting

controller and system board.

the reset command or the Turn the power off, then back

associated reset logic has on again. If the problem

failed.

persists, contact qualified

service personnel.

Time of day not set - run

SETUP program

Real Time Clock is not

set.

Run SETUP utility.

Timer 2 failure

The timer chip has failed.

Check the system board.

Turn the power off, then back

on again. If the problem

persists, contact qualified

service personnel.

SETUP

to enter ROM-based

Invalid configuration

information must be

changed.

You must run SETUP utility

and correct configuration

information.

Invalid configuration

information - please run

SETUP

Display adapter is

configured incorrectly.

Run the SETUP utility.

Memory size is incorrect.

Wrong number of diskette

drives.

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5-6

Troubleshooting and Repair

Table 5-2 POST Error Messages (cont’d)

Message

Possible Cause

Action

Keyboard clock line failure The keyboard, the

keyboard cable

Make sure the keyboard

cable and keyboard are

connected properly. Check

the keyboard controller and

the system board. Turn the

power off, then back on

again. If the problem persists,

contact qualified service

personnel.

connection, or the

keyboard controller is

defective.

Keyboard data line failure The keyboard controller

firmware has failed.

Check the keyboard

controller and system board.

Turn the power off, then back

on again. If the problem

persists, contact qualified

service personnel.

Keyboard stuck key failure A key is jammed.

Locate the jammed key and

fix it. Make sure the keyboard

cable and keyboard are

connected properly. Turn the

power off, then back on

again. If the problem persists,

contact qualified service

personnel.

Memory failure at hex-

value, read hex-value,

expecting hex-value

Circuitry associated with

the memory chips has

failed.

Turn the power off, then back

on again. If the problem

persists, contact qualified

service personnel.

Unexpected interrupt in

protected mode

Hardware interrupt or NCI Check the timer chip or the

occurred while in

protected mode.

interrupt controller on the

system board.

Real time clock failure

The RTC or battery failed. Run SETUP and turn the

power off and on. If the

problem persists, replace the

RT. battery. If the problem

remains, contact qualified

service personnel.

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Troubleshooting and Repair

5-7

Informational Messages

This section lists the messages that provide information to the user but require no action.

Table 5-3 BIOS Informational Messages

Message

Meaning

NCH Base Memory

NCH Extended

The amount of base memory that tested successfully.

The amount of extended memory that tested

successfully.

Memory tests terminated by

keystroke

The message indicate that a user pressed the

spacebar while memory tests were running and

stopped the memory tests.

Press the

key to continue

This message indicates that an error was found during

POST. Pressing the

attempt to reboot.

key allows the system to

Beginning memory test Press

SPACEBAR

A user can stop the memory tests by pressing the

spacebar.

the

memory test

to terminate the

Press the

key to continue,

This message indicates that an error was found during

to run the Setup utility

POST. Pressing the

attempt to boot. Press

key allows the system to

allows users to run the

ROM-based SETUP utility to correct configuration

information.

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5-8

Troubleshooting and Repair

Run-time Error Messages

The following table lists run-time error messages.

Table 5-4 Run-time Error Messages

Cause Action

Message

I/O card parity interrupt at

address. Type (S)hut off

NCI, (R)eboot, other keys to

continue

Memory on a peripheral card Check the memory cards

has failed. installed in the system.

Memory parity interrupt at

address. Type (S)hut off

NCI, (R)eboot, other keys to

continue

A memory chip(s) has failed. Replace the system board.

Unexpected HW interrupt,

interrupt at address. Type

(R)eboot, other keys to

continue

Hardware problem. Not

displayed if the expected

interrupt handler is not

enabled.

Check all hardware in the

system.

Unexpected SW interrupt,

interrupt at address. Type

(R)eboot, other keys to

continue

Error(s) in the software

Turn the machine off and

program. Not displayed if the then on again. If doesn’t

extended interrupt handler is work, check the program.

not enabled.

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Troubleshooting and Repair

5-9

QUICK TROUBLESHOOTING

This section summarizes problems that may develop during system operation and lists sug-

gested corrective actions.

Table 5-5 Quick Troubleshooting

Problem

Corrective Actions

No power

Check that the AC adapter is plugged into the

power connector of the system. Also, that the AC

adapter is plugged into a properly grounded AC

power outlet.

If using the battery as main power source, check

if the battery pack is of the right type, charged

and is inserted correctly.

Check the power board of the system. Is it

inserted into the system board connector

properly? Otherwise, replace the power board.

Data on the LCD is unreadable

Adjust the brightness and contrast display

controls found on the right side of the LCD panel.

Check if the LCD cables are inserted properly.

Check also connections inside the LCD panel.

Check if installed VGA driver is correct.

Check VGA controller chip on the system board

if there is any cold or loose soldering.

Replace the system board.

LCD screen does not show data

Check the LED Status Bar if Suspend mode is

activated. Press any key or press the power

button to resume operation and display.

Check if LCD cables are disconnected or loose.

Check if the display output is switched to the

external monitor.

Check if the Contrast level is set to minimum.

Check if there is power.

Replace LCD Inverter board found inside the

LCD Panel.

Battery Power does not last

Make sure that the power management features

are enabled.

Recharge the battery pack for 1½ hour before

using again.

Replace the battery pack.

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5-10

Troubleshooting and Repair

Table 5-5 Quick Troubleshooting (cont’d)

Problem

Corrective Actions

System halts during boot sequence

Check condition of selected bootload device

(diskette or hard disk) for bad boot track or

incorrect OS files.

Try booting from a new bootable diskette and

recopy or repartition hard disk.

Check for any BIOS error messages on the

display screen.

Replace the system board.

I/O processing malfunctions

Diskette drive does not work

Check the connections of all internal devices.

Replace the system board.

Check if the diskette drive cable is connected

properly.

Check the diskette type if correct and not faulty.

Replace the diskette drive.

Replace the system board.

Hard disk drive malfunction

Check if hard disk drive is set properly on CMOS

SETUP.

Check the drive cables and connections.

Check if the disk drive is good.

Replace the system board.

Memory malfunction

Check if the memory module is inserted properly.

Replace the memory module.

Replace the system board.

External keyboard or PS/2 mouse

doesn’t work

Check if keyboard or mouse are connected

properly. Check Y-cable if it is being used. Power

off system first before plugging in the device.

Replace the keyboard or mouse.

Replace the system board.

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Troubleshooting and Repair

5-11

Table 5-5 Quick Troubleshooting (cont’d)

Corrective Actions

Problem

PCMCIA card does not work

Check the PCMCIA driver installation for any

IRQ or IO address conflict.

Check if the PCMCIA card is inserted properly

and all connections are set.

Replace the PCMCIA card.

Check for work around for the card being used.

Replace the system board.

Serial device does not work

Parallel device does not work

Check if the serial device is connected properly.

Replace the serial device.

Check the I/O controller chip on the system

board for any cold or loose soldering.

Replace the system board.

Check if all connections are properly set.

Check if external device is turned on.

Check I/O controller chip on the system board for

any cold or loose soldering.

Replace the system board.

Check if the Port is enabled in Setup.

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Appendix A

Video Modes

The C&T 65548 VGA chipset supports high resolution fixed frequency and variable fre-

quency analog monitors in interlaced and non-interlaced modes of operation. Digital moni-

tor support is also built-in. The tables in this section list all 65548 CRT monitor video

modes.

NOTE: The letter “I” under the Hex Mode col-

umn for the succeeding tables denotes Interlaced

monitors.

VGA STANDARD MODES

The following table lists VGA standard modes.

Table A-1 VGA Standard Modes (Text Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel

Resolution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

0, 1

40 x 25

9 x 16

360 x 400

320 x 350

320 x 200

28.322

25.175

31.5

8 x 14

8 x 8

2, 3

80 x 25

9 x 16

8 x 14

8 x 8

720 x 400

640 x 350

640 x 200

720 x 400

720 x 350

28.322

31.5

25.175

28.322

Mono

9 x 16

9 x 14

9 x 8

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A-2

Video Modes

Table A-2 VGA Standard Modes (Graphics Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

40 x 25

80 x 25

8 x 8

320 x 200

640 x 200

25.175

31.5

Table A-3 VGA Standard Modes (Planar Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

40 x 25

80 x 25

80 x 30

8 x 8

320 x 200

640 x 200

640 x 350

640 x 480

25.175

31.5

8 x 8

Mono

8 x 14

8 x 16

Table A-4 VGA Standard Modes (Packed Pixel Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

256

40 x 25

8 x 8

320 x 200

25.175

31.5

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Video Modes

A-3

VGA EXTENDED MODES

The C&T 65548 VGA BIOS supports standard VESA and extended modes, listed in the

following table.

Table A-5 VGA Extended Modes (Text Mode)

Hex

Mode

No. of

Colors

Text

Display

Font

Size

Pixel

Resolution

Dot Clock Horiz.

Vert.

Freq.

MHz

Freq.

KHz

132 x 25 8 x 16

132 x 50 8 x 16

1056 x 400

40.0

30.5

Table A-6 VGA Extended Modes (4-Bit Linear Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

24I

80 x 30

8 x 16

640 x 480

800 x 600

1024 x 768

25.175

40.0

31.5

37.5

48.5

35.5

100 x 37 8 x 16

128 x 48 8 x 16

65.0

44.9

Table A-7 VGA Extended Modes (8-Bit Linear Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

256

80 x 30

8 x 16

640 x 480

800 x 600

1024 x 768

25.175

40.0

31.5

37.5

48.5

35.5

100 x 37 8 x 16

128 x 48 8 x 16

34*

34I*

65.0

44.9

Table A-8 VGA Extended Modes (15-Bit Linear Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

40*

32K

80 x 30

8 x 16

640 x 480

50.350

31.5

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A-4

Video Modes

Table A-9 VGA Extended Modes (16-Bit Linear Mode) - 1MB Video

Memory Only

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

64K

80 x 30

8 x 16

640 x 480

50.350

31.5

Table A-10 VGA Extended Modes (24-Bit Linear Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

50*

80 x 30

8 x 16

640 x 480

65.0

27.1

51.6

Table A-11 VGA Extended Modes (Planar Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

6A, 70 16

100 x 37 8 x 16

128 x 48 8 x 16

800x 600

40.0

65.0

44.9

38.0

48.5

35.5

72, 75

1024 x 768

72, 75I

Table A-12 VGA Extended Modes (Packed Pixel Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

80 x 25

80 x 30

8 x 16

640 x 400

640 x 480

800 x 600

1024 x 768

25.175

40.0

31.5

37.5

48.5

35.5

256

7E*

7EI*

100 x 37 8 x 16

128 x 48 8 x 16

65.0

44.9

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Video Modes

A-5

VGA HIGH REFRESH MODES

The following tables list VGA high refresh modes.

Table A-13 VGA High Refresh Modes (Packed Pixel Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

256

80 x 30

8 x 16

640 x 480

800 x 600

31.5

49.5

37.5

46.9

32*

100 x 37 8 x 16

Table A-14 VGA High Refresh Modes (Planar Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

80 x 30

8 x 16

640 x 480

800 x 600

31.5

49.5

37.5

46.9

6A, 70 16

100 x 37 8 x 16

Table A-15 VGA High Refresh Modes (Packed Pixel Mode)

Hex

Mode

No. of

Colors

Text

Display Size

Font

Pixel Reso-

lution

Dot

Clock

MHz

Horiz.

Freq.

KHz

Vert.

Freq.

256

80 x 30

8 x 16

640 x 480

800 x 600

31.5

49.5

37.5

46.9

7C*

100 x 37 8 x 16

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BATTERY REPLACEMENT

A CMOS clock battery in your computer maintains system configuration information. In the event

that the battery fails to maintain system configuration information, NEC recommends that you re-

place the battery. Have an authorized NEC service representative replace the battery.

WARNING

There is a danger of explosion if the battery is incorrectly replaced. Replace only with the

same or equivalent type recommended by the manufacturer. Discard used batteries ac-

cording to the manufacturer’s instructions.

ATTENTION

Il y a danger d’explosion s’il y a replacement incorrect de la batterie. Remplacer uniquement

avec une batterie du même type ou d’un type recommandé par le constructeur. Mettre au rébut les

batteries usagées conformément aux instructions du fabricant.

BATTERY DISPOSAL

The main battery and CMOS clock battery are made of nickel metal hydride (NiMH).

Contact your local waste management officials for other information regarding the environmentally

sound collection, recycling, and disposal of the batteries. For additional information on the proper

collection or disposal of rechargeable batteries, please call 1-800-8-BATTERY.

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Index

heat plate, 4-7

I/O board, 4-10

keyboard, 4-7

AC adapter

LCD, 4-8

connecting, 1-9

LCD status bar cover, 4-6

LED board, 4-9

AC power adapter, 3-10

AC/DC adapter specifications, 2-16

Power board, 4-12

required tools, 4-3

system board, 4-10

top cover, 4-8

Battery

removing, 1-8

VersaGlide, 4-8

Battery charger specifications, 2-15

Battery compartment latch, 1-13

Battery compartment release lock, 1-8

Battery packs

Disassembly procedures, 4-4

Diskette drive

standard, 1-7

Diskette drive specifications, 2-13

handling, 4-2

Battery specifications, 2-14

Battery types, 1-8

BIOS, 3-2

BIOS informational messages, 5-7

BIOS Setup utility, 1-14, 3-3

BIOS upgrade procedure, 1-20

Embedded numeric keyboard, 1-5

Environmental specifications, 2-21

EPROM chip, 3-3

External keyboard, 1-10

External monitor

connecting, 1-11

External VGA, 3-8

CD-ROM reader specifications, 2-14

Cleaning the notebook

exterior, 4-1

FastFacts, 5-2

interior, 4-2

Features, 1-2

CMOS battery

Field service guidelines, 4-1

Field-replaceable parts list, 4-13

Floating point unit, 3-3

Fn keys, 1-5

discharging, 1-17

COM 1, 1-12

Converter board specifications, 2-8

CPU, 1-2

Functional block diagram, 3-2

P54CSLM, 3-3

removing, 4-7

Hard disk drive compartment, 1-8

Hard disk drive specifications, 2-14

Hard disk drives

DC/DC converter specifications, 2-15

DIMM module, 1-20

Disassembly

protecting, 4-2

Hard disk subsystem, 3-9

Hardware reset switch, 1-10

HDD LED, 3-10

battery pack, 4-4

CPU, 4-7

diskette drive, 4-5

hard disk drive, 4-5

Hot key descriptions, 2-21

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Index-2

PHDisk utility, 1-20

POST messages, 5-4

Power board, 3-11

I/O board specifications, 2-10

I/O subsystem, 3-6

Power connector, 1-9

Power management modes, 2-19

Power specifications, 2-22

Power subsystem, 3-10

Power switch, 1-4

Illustrated Parts Breakdown (IPB), 4-13

Intel P54CSLM, 3-3

Keyboard, 1-5

Power-on self test (POST), 1-14

Preventive maintenance, 4-1

Printer

Keyboard controller, 3-8

Keyboard specifications, 2-16

connecting, 1-12

Product information

Using FastFacts, 5-2

PS/2 mouse, 1-10

LCD cover switch, 1-4

LCD inverter board, 3-11

LCD quality

maintaining, 4-3

LED indicator board specifications, 2-9

LED status indicators, 2-13

Quick troubleshooting, 5-8

Resolution, 3-8

Memory

Run-time error messages, 5-8

DRAM, 3-6

ROM, 3-6

upgrading, 1-19

SCANDISK, 4-2

Separating the system and I/O boards, 4-11

serial mouse, 1-10

Serial port, 1-12

Service information, 5-1

Setup utility, 1-14

Memory compartment, 1-7

Memory compartment cover, 1-13

Memory configurations, 1-19

Memory controller, 3-4

Memory subsystem, 3-6

Microprocessor, 3-3

Model configurations, 1-1

menu, 1-14

Shock specifications, 2-22

Specifications

system, 2-1

NEC service telephone numbers, 5-1

NiMH battery, 1-8

Num lock key, 1-5

Status indicators, 2-13

Status panel LEDs, 1-4

Subsystems, 3-1

System board specifications, 2-7

System configuration diagram, 1-3

System features, 1-2

System logic controller, 3-4

System processor, 3-3

System specifications, 2-1

System upgrades, 1-19

Packaging and documentation

part numbers, 4-16

Part numbers, 4-13

PC card slot

using, 1-8

PCMCIA controller, 3-9

PCMCIA sockets, 3-9

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Index-3

Technical support

contacting, 5-1

Transfer board specifications, 2-8

Troubleshooting checklist, 5-3

VersaGlide subsystem, 3-10

VGA extended modes, A-3

VGA high refresh modes, A-5

VGA port, 1-11

VGA standard modes, A-1

VGA VESA driver diskette, 1-11

Vibration specifications, 2-22

Video controller, 3-7

features, 3-7

Video modes, A-1

Y-adapter, 1-10

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