NEC versa 2400 schematic

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PROPRIETARY NOTICE AND LIABILITY DISCLAIMER

The info rmat ion disclos ed in t his do cument , inclu ding all designs and r elat ed materials, is the valuable pr opert y of NEC Cor p oration (NEC) and/or its licensors. NEC and/or its licensors, as appropriate, r eserve all pat ent, copyright and other proprietary rights to t his document, including all design, manufacturing, reproduction, use, and sales rights t heret o, except to the extent said rights are expressly granted to others.

The NEC product(s) discussed in this document are warr anted in accordance with the terms of the Warranty Statement accompanying each product. However, actual performance of each such product is dependent upo n fact ors 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 applicat ions must be determined by the customer and is not warranted by NEC.

To allow for design and specification impro vement s, t he information in this do cument is subject to change at any time, without no tice. Reproduct ion of this document or po rtions thereof without prior written approval of NEC is prohibited.

Versa is a U.S. registered trademark of NEC Technologies, Inc. FastFacts, and NEC SVGA, are U.S. trademarks of NEC Technologies, Inc. All other p roduct, brand, or tra de names used in t his public ation a re the tr ademarks or regis tered

trademarks of their respective trademark owners.

First Printing — September 1996

NEC Technologies, Inc. NEC Corporation

1414 Massachusetts Avenue 7-1 Shiba 5-Chome, Minato-Ku

Boxborough, MA 01719 Tokyo 108-01, Japan

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Preface

This service and reference manual contains the technical information necessary to set up, and maintain the NEC Versa® 2400 Series notebook computer. It also provides hardware and interface information for users who need an overview of the system’s design. The manual is written for NEC-trained customer engineers, system analysts, service center personnel, and dealers.

The manual is organized as follows: Section 1  Introduction, provides an overview of the hardware and interface compo-

nents. Section 2  General Specifications, lists system specifications including dimensions,

weight, environment, safety compliance, and power consumption. Section 3  Hardware Functional Overview, defines major system functions and subsys-

tems.

Section 4  Field Service Guidelines, provides system disassembly procedures, and an exploded-view diagram with corresponding part numbers.

Section 5  Troubleshooting and Repair, lists technical support phone numbers, error messages and their meanings, and ways to troubleshoot the notebook.

Appendix A  Video Modes, provides a list of video modes available for use with the notebook.

An Index is included for convenience.

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

iii

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

VersaGlide..................................................................................................... 1-7

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

The Right Side Of the Notebook........................................................................... 1-8

Built-in Floppy Disk Drive ............................................................................. 1-8

PCMCIA Slot Compartment.......................................................................... 1-8

Hard Disk Drive Compartment....................................................................... 1-9

Front of the Notebook .......................................................................................... 1-9

Battery Compartment..................................................................................... 1-9

Left Side of the Notebook..................................................................................... 1-10

DC-IN Connector Jack................................................................................... 1-10

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

The Rear of the Notebook..................................................................................... 1-11

External Keyboard and PS/2 Mouse Port ....................................................... 1-11

VGA Port...................................................................................................... 1-12

Printer Port.................................................................................................... 1-13

Serial Port (COM 1)....................................................................................... 1-13

Bottom of the Notebook....................................................................................... 1-14

Battery Module Handle and Lock................................................................... 1-14

ROM Memory Compartment Cover............................................................... 1-14

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iv Contents

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

The Boot Setup Menu.................................................................................................. 1-15

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

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

System BIOS Upgrade Procedure................................................................................ 1-21

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................................................................................................... 2-9

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

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

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

FDD Specification........................................................................................................ 2-13

HDD Unit Specification............................................................................................... 2-14

NiMH Battery Pack Specification................................................................................. 2-14

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

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

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

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

BIOS........................................................................................................................... 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 Specification......................................................................................... 2-21

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

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

Shock .......................................................................................................................... 2-23

Electro-static Discharge (ESD).................................................................................... 2-23

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Section 3 Hardware Functional Overview

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

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

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

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

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

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

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

ROM Memory ...................................................................................................... 3-6

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

Video Subsystem ......................................................................................................... 3-7

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

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

Contents v

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

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

Hard Disk Subsystem................................................................................................... 3-10

Floppy Disk Drive Subsystem ...................................................................................... 3-10

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

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

AC Power Adapter ............................................................................................... 3-11

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

Powerboard .......................................................................................................... 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 Equipment.................................................................................... 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 Floppy Disk Drive Module ............................................. 4-5

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

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vi Contents

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

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

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

NEC Versa 2400 Series 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

List of Figures

1-1 NEC Versa 2400 Series Notebook................................................................. 1-1

1-2 System Configuration Diagram....................................................................... 1-3

1-3 Standard Keyboard Layout............................................................................. 1-5

1-4 VersaGlide..................................................................................................... 1-7

1-5 Memory Slot Compartment............................................................................ 1-7

1-6 Inserting a PCMCIA Card.............................................................................. 1-8

1-7 Removing the Battery Pack............................................................................ 1-9

1-8 Left Side of the Notebook.............................................................................. 1-10

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1-9 Connecting the AC Adapter to the Notebook................................................. 1-10

1-10 The Rear Side of the Notebook...................................................................... 1-11

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

1-12 Connecting an External Monitor..................................................................... 1-12

1-13 Connecting to the Printer Port........................................................................ 1-13

1-14 Connecting to the Serial Port ......................................................................... 1-13

1-15 The Boot Setup Menu.................................................................................... 1-15

3-1 Functional Block Diagram.............................................................................. 3-2

4-1 Hard Disk Drive Module Assembly ................................................................ 4-5

4-2 Floppy Drive Module Assembly ..................................................................... 4-6

4-3 The LED Board Module Assembly................................................................. 4-9

Contents vii

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

4-5 The I/O Board Module Assembly................................................................... 4-11

4-6 Power Board Module Assembly..................................................................... 4-12

4-7 NEC Versa 2400 Series Illustrated Parts Breakdown...................................... 4-15

List of Tables

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

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

1-3 Fn Key Combination Summary....................................................................... 1-6

1-4 Boot Main Setup Menu.................................................................................. 1-16

1-5 Boot Setup Peripherals Menu......................................................................... 1-17

1-6 Boot Setup Security Menu............................................................................. 1-17

1-7 Boot Setup Power Savings Menu................................................................... 1-18

1-8 8 MB Memory Configurations........................................................................ 1-20

1-9 16 MB Memory Configurations...................................................................... 1-20

2-1 NEC Versa 2400 Series Specifications........................................................... 2-1

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

2-3 Main Board Specifications.............................................................................. 2-7

2-4 Transfer Board Specifications......................................................................... 2-8

2-5 Converter Board Specifications...................................................................... 2-8

2-6 LED Indicator Board Specifications............................................................... 2-9

2-7 I/O Board Specifications................................................................................ 2-10

2-8 LCD Inverter Board Specifications................................................................. 2-12

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viii Contents

2-9 Status LED Descriptions................................................................................ 2-13

2-10 FDD Specifications ........................................................................................ 2-13

2-11 Hard Disk Drive Specifications....................................................................... 2-14

2-12 CD-ROM Reader Specifications..................................................................... 2-14

2-13 Battery Specifications..................................................................................... 2-14

2-14 DC/DC Converter & Battery Charger ............................................................ 2-15

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

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

2-17 AC/DC Adapter Specifications....................................................................... 2-16

2-18 BIOS Specifications....................................................................................... 2-17

2-19 Micro-Controller Specifications...................................................................... 2-18

2-20 Power Management Modes............................................................................ 2-19

2-21 Mode Definitions ........................................................................................... 2-20

2-22 Hot Keys........................................................................................................ 2-21

2-23 Environmental Specifications.......................................................................... 2-21

2-24 Power Specifications...................................................................................... 2-22

2-25 Vibration Specifications ................................................................................. 2-22

2-26 Shock Specifications...................................................................................... 2-23

2-27 Electro-static Discharge (ESD) Specifications................................................ 2-23

4-1 NEC Versa 2400 Series Field-Replaceable Parts............................................. 4-13

4-2 Packaging and Documentation Part Numbers................................................. 4-16

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

5-2 POST Error Messages.................................................................................... 5-4

5-2 POST Error Messages.................................................................................... 5-5

5-3 BIOS Informational Messages........................................................................ 5-7

5-4 Run-time Error Messages............................................................................... 5-8

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

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

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

A-3 VGA Standard Modes (Planar Mode) ............................................................ A-2

A-4 VGA Standard Modes (Packed Pixel Mode) .................................................. A-2

A-5 VGA Extended Modes (Text Mode).............................................................. A-3

A-6 VGA Extended Modes (4-Bit Linear Mode)................................................... A-3

A-7 VGA Extended Modes (8-Bit Linear Mode)................................................... A-3

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A-8 VGA Extended Modes (15-Bit Linear Mode)................................................. A-3

A-9 VGA Extended Modes (16-Bit Linear Mode)

- 1 MB Video Memory Only ......................................................................... A-4

A-10 VGA Extended Modes (24-Bit Linear Mode)................................................. A-4

A-11 VGA Extended Modes (Planar Mode)............................................................ A-4

A-12 VGA Extended Modes (Packed Pixel Mode).................................................. A-4

A-13 VGA High Refresh Modes (Packed Pixel Mode)............................................ A-5

A-14 VGA High Refresh Modes (Planar Mode)...................................................... A-5

A-15 VGA High Refresh Modes (Packed Pixel Mode)............................................ A-5

Contents ix

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(For United States Use Only)

FEDERAL COMMUNICATIONS COMMISSION

RADIO FREQUENCY INTERFERENCE STATEMENT

WARNING:

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

NOTE:

dig ita l dev ice, pur su ant to Pa rt 15 of t he FCC Rule s. The se limit s a re des igne d t o p ro vid e 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.

How e v e r , t h e r e is no gu a r ante e th a t inte rfe r e n c e w ill n ot oc c u r in a p ar tic u la r ins ta lla tion. I f this equipment does cause harmful inter ference to radio o r television recept ion, which can be determined by turning the equipment off and on, the user is encouraged to tr y to cor rect 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 differ ent from the one to which the receiver is connected.

Use a shielded and properly grounded I/O cable to ensure compliance of this unit to the specified limits of the rules.

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

Th is eq uip ment ha s be en t es t ed and fou nd t o co mp ly wit h t he limit s fo r a C lass B

(For Canadian Use Only)

This equipment is a Class B digital apparatus which complies with the Radio Interference Regulations, C.R.C., c.1374. Cet appareil numérique de la classe B est conforme àu Règlement sur le brouillage radioélectrique, C.R.C., ch.1374.

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Abbreviations

xiii

A ampere AC alternating current AT advanced technology

(IBM PC) BBS Bulletin Board System BCD binary-coded decimal BCU BIOS Customized Utility BIOS basic input/output system bit binary digit bpi bits per inch bps bits per second BUU BIOS Upgrade Utility C centigrade Cache high-speed buffer storage CAM constantly addressable memory CAS column address strobe CD-ROM compact disk-ROM CGA Color Graphics Adapter CGB Color Graphics Board CH channel clk clock cm centimeter CMOS complementary metal oxide

semiconductor COM communication CONT contrast CPGA ceramic pin grid array CPU central processing unit CRT cathode-ray tube DAC digital-to-analog converter DACK DMA acknowledge DC direct current DIP dual in-line package DLAB Divisor Latch Address bit DMA direct memory access DMAC DMA controller

DOS disk operating system DRAM dynamic RAM DTE data terminal equipment ECC error checking and correction EDS error detecting system EGA Enhanced Graphics Adapter EMS Expanded Memory

Specification EPP enhanced parallel port EPROM erasable and programmable

ROM EVGA Enhanced Video Graphics

Array F Fahrenheit FAX facsimile transmission FCC Federal Communications

Commission FG frame ground FM frequency modulation Fn Function FRU field-replaceable unit GB gigabyte GND ground HDD hard diskdrive HEX hexadecimal HGA Hercules Graphics Adapter Hz hertz IC integrated circuit ID identification IDE intelligent device electronics IDTR interrupt descriptor table

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xiv Abbreviations

IRR Interrupt Request register ISA Industry Standard Architecture ISR In Service register I/O input/output IPC integrated peripheral controller ips inches per second IRQ interrupt request K kilo (1024) k kilo (1000) KB kilobyte kg kilogram kHz kilohertz kV kilovolt lb pound LDTR local descriptor table register LED light-emitting diode LSB least-significant bit LSI large-scale integration M mega mA milliamps max maximum MB megabyte MDA Monochrome Display Adapter MFM modified frequency modulation Mhz megahertz mm millimeter ms millisecond MSB most-significant bit NASC National Authorized Service

Center NC not connected NDP numeric data processor NMI Non-maskable Interrupt ns nanosecond NSRC National Service Response

Center PAL programmable array logic

PCB printed circuit board PFP plastic flat package PIO parallel input/output pixel picture element PJQFP plastic J-lead quad flat pack PLCC plastic lead chip carrier PLL phase lock loop p-p peak-to-peak PPI programmable peripheral

interface PROM programmable ROM QFP quad flat pack RAM random-access memory RAMDAC RAM digital-to-analog RAS row address strobe RGB red green blue RGBI red green blue intensity ROM read-only memory rpm revolutions per minute R read RTC real-time clock R/W read/write S slave SCSI Small Computer System

Interface SDLC Synchronous Data Link

Control SG signal ground SOIC small outline integrated circuit SQFP silver quad flat package SVGA Super Video Graphics Array SW switch TCP Thin chip package TQFP Thin-quad flat package TSC Technical Support Center TTL transistor/transistor logic tpi tracks per inch

PC personal computer

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UART universal asynchronous

receiver/transmitter V volt Vdc volts, direct current VESA video electronics standards

association VFO variable frequency oscillator VGA Video Graphics Array VLSI very large-scale integration VRAM virtual RAM W watt µf microfarad µPD microprocessor

Abbreviations xv

µs microsecond Ω ohm

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Section 1

Introduction

This section focuses on providing outline features and operations of the NEC Versa 2400 Notebook Computer Series, including the BIOS Setup program. (Refer to the User’s Guide for more information how to operate the notebook.) The NEC Versa 2400 Series of notebooks are lightweight, compact, and fully IBM compatible.

The NEC Versa 2400 Notebook Series comes in the following model configurations.

Table 1-1 Model Configurations

Configuration NEC Versa 240X NEC Versa

240XCD

CPU

On-Board DRAM Video Memory Hard Disk Drive Color LCD Battery Pack

* Models contain built-in CD-ROM readers

Intel P54CSLM100

8 MB 8 MB 16 MB 1 MB 1 MB 1 MB 810 MB 1 GB 1 GB

11.3” DSTN LCD 11.3” DSTN LCD 11.3” DSTN LCD A (3500mA NiMH) A (3500mA NiMH) A (3500Ma NiMH)

Intel P54CSLM100

NEC Versa

243XCD

Intel P54CSLM133

Figure 1-1 NEC Versa 2400 Series Notebook

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1-2 Introduction

FEATURE HIGHLIGHTS

The NEC Versa 2400 notebook series includes a variety of innovative features designed to meet the most demanding computing requirements:

Table 1-2 Feature Highlights

Features Description CPU

Memory

Display

VGA

HDD FDD Keyboard

Pointing Device PCMCIA Slot

I/O Port

Intel P54CSLM-100MHz (Intel P54CSLM-133MHz for 243X) processor with internal 16KB cache memory and math coprocessor

On-board 8MB RAM (16MB for NEC Versa 243XCD) and can be upgraded to 40MB

11.3” DSTN VGA Color LCD at 600 x 800 pixels resolution with 256 colors

32-bit Video PCI bus VGA controller/ 1MB RAM Video Memor Supports up to 1024 x 768 pixels resolution for external CRT monitor with 256 colors

Built-in 2.5-inch IDE high capacity hard drive (12.7mm height) Built-in 3.5-inch 1.44MB floppy disk drive Built-in 87/88-ke

embedded numeric ke dedicated screen control ke enhanced 101/102-key compatible keyboard

VersaGlide Two PCMCIA 2.1 card slots that support two T

same time or one Type III and one Type II PC cards at the same time 1 x Serial Port (w/ FIFO) / 1 x Printer Port (ECP/EPP) / 1 x VGA Port

/ 1 x PS/2 keyboard & mouse port

keyboard with 12 programmable function keys,

pad and special function control keys,

s, and inverted “T” cursor keys / IBM

pe II PC cards at the

Power System

Auto-switchin Battery pack / Advanced power management capabilities

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

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SYSTEM CONFIGURATION

The following diagram shows the NEC Versa 2400 system configuration.

Introduction 1-3

INTEL

P54CSLM(TCP)

CPU

BIOS

Flash ROM

8 / 16MB RAM

On-Board

Upgradable to

48MB

Bank 1 (Slot 1)

4 / 8 / 16MB

DIMM

Built-in

HDD

Color LCD (800x600)

DSTN

VL Bus

Controller

(VGA)

Glide Pad

Pointin

Device

Keyboard

Serial Interface

(RS-232C)

Parallel

Interface

PCMCIA Card

Slot x 2

External VGA

Monitor

PS/2 Keyboard

and

PS/2 Mouse

RS-232C

Peripheral

Printer

PCMCIA Card

3.5" FDD Battery Pack

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 recommended 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 2400 computer.

Color LCD Display Panel

Both the NEC Versa 240X and 243X series have a built-in 11.3” 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 simultaneous display with an external VGA monitor.

The LCD screen also uses Cold Cathode Fluorescent Tube (CCFT) backlighting which consumes most of the power from the notebook. To save battery power, the system has an advanced 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 that allows you to continue your application work at the place you last left it before the suspend mode was activated.

NOTE: Always wait for a few seconds between turning off and turning on the power. Likewise, check to see if the power switch is turned off before installing the power supply.

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

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NOTE: If the NEC Versa 2400 has been left un- used for a prolonged period of time the battery may become completely discharged. It will then be necessary for you to reconnect the AC adapter for approximately 30 minutes before the battery will begin to recharge normally.

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 of determining what the power mode the unit is in at the moment. Below these two LEDs is a row of seven more. These LEDs will 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.

Introduction 1-5

Keyboard

The notebook has a built-in 87/88-key keyboard that provides complete emulation of a fullsized 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 will become active.

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1-6 Introduction

NOTE: Activating the Num Lock key will in turn disable the alphanumeric keys where the embedded 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 +

<right>

<Fn>

<left>

<Fn>

<Up>

<Fn>

key

key +

key

key +

key

key +

key

key +

key

key +

key

key +

key

key +

key

key +

key

key +

key

Function

This key combination puts the system in Suspend mode.

This key combination mutes the speaker volume.

This ke displa LCD and CRT.

This ke and off.

This key combination increases the contrast level.

This key combination decrease the contrast level.

This ke LCD.

This ke tally.

combination toggles between video display output to the LCD

, to an external CRT monitor, or to a simultaneous display of

combination toggles the LCD display backlighting (CCFT) on

combination increase the brightness incrementally for the

combination decreases the brightness incrementally for the

combination increases the speaker volume level incremen-

combination decreases the speaker volume level incremen-

The notebook’s keyboard also features an embedded editing keypad, which offers an optional 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 operational, 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.

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VersaGlide

In front of the keyboard panel, in the center of the palm rest typing surface, is the VersaGlide 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. The VersaGlide is compatible with the standard PS/2 mouse and can be activated using the normal DOS or Windows IBM or PS/2 mouse driver.

Introduction 1-7

Figure 1-4 VersaGlide

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 4MB, 8MB, and 16MB DIMM modules.

Figure 1-5 Memory Slot Compartment

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1-8 Introduction

The Right Side of the Notebook

This section describes the features on the right side of the NEC Versa 2400 computer.

Built-in Floppy Disk Drive

On the right-front side of the notebook you will find the floppy disk drive which supports

3.5-inch 1.44MB high density (HD) diskettes or 720KB double-sided (DS) diskettes. Insert the floppy diskette with the metal shutter towards the drive and the diskette label facing up. To remove the floppy diskette, you press the eject button found on the upper right of the floppy disk drive.

PCMCIA Slot Compartment

The PCMCIA slot compartment houses two card slots that support two PCMCIA Type II devices or one Type III device. Open the compartment door to view the PCMCIA 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 PCMCIA card, push on the eject button to release the pin connections and slowly pull out the card.

The NEC Versa 2400 Series also comes with DOS/Windows PCMCIA drivers for supporting various PCMCIA 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 inserted PCMCIA cards. The upper PCMCIA slot is referred to “ the bottom slot is referred to as “ drive designations.

Figure 1-6 Inserting a PCMCIA Card

Slot 1

”. Slot 0 always takes precedence over Slot 1 in

Slot 0

” while

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Hard Disk Drive Compartment

Just beside the floppy disk drive, and below the PCMCIA slots, is the notebook’s internal hard drive. The NEC Versa 2400 provides industry standard 2.5-inch IDE hard disk drive at 810MB and 1GB. The System BIOS of the notebook also includes Auto IDE detection and LBA mode for easy installation 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 2400 computer.

Battery Compartment

In the left front corner of the notebook is the battery compartment. It houses the rechargeable 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, to have it always charged. Leaving the battery pack out of the unit for a long period of time will completely drain the battery cells.

Introduction 1-9

To remove the battery pack from the compartment unit, push the battery compartment release lock and slowly pull out the battery pack.

NOTE: There are two types of battery packs for the NEC Versa 2400 Series. The NEC Versa 240X models uses Type A battery packs with 3500mA; while the NEC Versa 243X models uses Type B battery packs with 3500mA. Both battery packs are not interchangeable and may cause damage to the computer if swapped.

Figure 1-7 Removing the Battery Pack

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1-10 Introduction

Left Side of the Notebook

The following details the left side of the NEC Versa 2400.

DC-IN Connector

Reset Switch

Figure 1-8 Left Side of the Notebook

DC-IN Connector Jack

To the left of the PCMCIA compartment, you will find a connector jack for the AC. The NEC Versa 2400 series provides a universal auto-switching AC adapter where you connect the AC power cord and into the power outlet. It is important to have the AC adapter connected 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 2400 notebook.

Power Switch

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.

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The Rear of the Notebook

The following details the rear side of the NEC Versa 2400.

Introduction 1-11

Serial 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 2400 also provides a Y-connector adapter allowing simultaneous use of an external AT-enhanced keyboard and a PS/2 mouse. When the external PS/2 mouse is connected using the Y-connector, the built-in VersaGlide is disabled.

VGA Port

Ext. K/B and PS/2 Mouse Port

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

NOTE: When connecting an external PS/2 mouse, it is required that you power off the computer first before connecting the PS/2 mouse. This way, the system can detect the external PS/2 mouse and disable the built-in VersaGlide.

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1-12 Introduction

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 the external VGA monitor alone, the VGA port can support resolution at 800x600 at 256 colors and 1024x768 at 16 colors for the NEC Versa 2400 and 640x480 at 64K colors, 800x600 at 256 colors, and 1024x768 at 256 colors for both the NEC Versa 2400 and 2430.

The NEC Versa 2400 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 will only show 800x600 resolution if the computer is running at Simultaneous display. You need to toggle the display to the external monitor only in order to display 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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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

Introduction 1-13

Serial Port (COM 1)

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.

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1-14 Introduction

Bottom of the Notebook

The following details the bottom of the NEC Versa 2400.

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 fingernail to open this cover. Inside is the ROM chip. It is not neccessary to remove this cover while performing normal service operations.

SYSTEM BIOS SETUP PROGRAM

This section provides the outline features and operation of the Phoenix BIOS Setup program used in the NEC Versa 2400 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

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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 pop-up 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:

Introduction 1-15

Figure 1-15 The Bootup Setting Menu

The boot setup menus let you configure system settings as listed in the following tables.

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g sy

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1-16 Introduction

Table 1-4 Boot Main Setup Menu

Item Function

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

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

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

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

Diskette A This option allows you to specify the type of diskette drive

mounted inside the notebook. The default settin option is

HDD LBA Mode The NEC Versa 2400 supports LBA (logical block addressing)

mode which is drives over DOS’ limit of 528MB.

Hard Disk This option allows you to specify the type of hard drive

mounted inside the notebook. Select the

detect the relevant parameters of the hard drive. Some hard drives, however, do not respond correctl

values detected. In such cases, from the list, the make and model of the drive being used.

Base Memory This field reports the amount of base (or conventional)

memor should not exceed or go below 640KB.

hour : minute : second

month day, year

3.5”, 1.44MB disk drive

Enabled

Auto

option to instruct the BIOS to automatically

found by the BIOS during its POST. The value

. You can change the system

. You can change the system date

for this

automatically for large capacity hard

to the

ou must search and select,

Extended Memory This field reports the amount of extended memory found b

the BIOS during POST. The value displayed is the amount of the memor Versa 2400 series have a minimum of 8MB of memor standard confi 3072KB.

Boot Sequence This option allows you to configure the computer to which

drive it will first try to look for the operating system. Select

is no diskette found in the flopp try to load the operating system from the hard drive.

Select there is no operatin computer will tr drive.

Select system and all necessary startup file configurations.

Num Lock This option allows you to toggle the Num Lock key on or off. Keyboard Repeat

Rate

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

address map. Because all models in the NEC

uration, this value should not be less than

A: then C:

C: then A:

C: only

if you want to boot from a diskette. If there

drive, the computer will then

if you want to boot from a hard drive. If

stem found in the hard drive the

to load the operating system from a flopp

if the hard drive already holds an operating

2, 6, 10, 13.3, 18.5, 21.8, 26.7, or 30

as the

seconds.

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g y

g ag

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Table 1-5 Boot Setup Peripherals Menu

Item Function Serial Port

Infrared Serial Port

Parallel Port

Parallel Mode

Diskette Controller IDE Adapter

This option allows as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4), (2E8-IRQ3), or none. The default setting is (3F8-IRQ4).

This option allows serial port as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4), (2E8-IRQ3), or none. The default is (2F8-IRQ3).

This option allows port as either (378-IRQ5), (3BC-IRQ7), (278-IRQ5), (378IRQ7), or none. The default is (378-IRQ7).

This option allows mode as either Unidirectional, Bi-directional, Enhanced, or ECP. The default is ECP.

This option allows you to disable the floppy disk controller. This option allows you to disable the IDE adapter.

Introduction 1-17

ou to configure the notebook’s serial port

ou to configure the notebook’s infrared

ou to configure the notebook’s parallel

Table 1-6 Boot Setup Security Menu

Item Function Password

Set Password Password on Boot

Password on Resume

This option allows the use of a password. If dow will appear askin password can be up to seven characters in len cleared by eliminating the password with the F1 key.

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.

<Enter>

Press This option allows

abled at the operating system level. This option allows

abled when resuming from the suspend mode. The CapsLock and ScrollLock LED’s will flash in sequence for

30 seconds, indicatin sume. The LED’s will start flashin hit until a password is entered.

ou to limit access to the computer through

ou select this option, a pop-up win-

ou to set or change the password. A

th, and is

to enter the Password.

ou to configure the Password to be en-

that the password is required to re-

ain as soon as a key is

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

Item Function

Power Saving

Standby Time-out

Auto Suspend Time-out

SUSPEND Mode

This option allows ment.

Select nored and disabled as well.

Select onl will enable the power management while on battery.

Select Enabled, the power mana time.

This option allows will be in the Idle Mode before entering the Standby Mode.

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

Possible values include This option allows

will be in the Standb Mode.

Possible values include This option allows you to enable SUSPEND Mode. Select

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

enablin display screen when the system restarts.

Select The computer will switch to the SUSPEND Mode after the

preset time of inactivit computer becomes inactive, all devices are in SUSPEND Mode, and the CPU is powered off.

Disabled

Disabled ON AC

when the computer is powered by the AC adapter, but

Mode Places the Serial, infrared and parallel ports,

Save to File

this; otherwise an error message will appear on the

SUSPEND

ou to enable or disable power manage-

, all other power mana

, the power mana

ou to specify the length of time the system

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

ou to specify the length of time the system

Mode before entering the SUSPEND

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

, the computer will save data to the hard

, the computer will save data to RAM

. During this SUSPEND Mode the

ement settings are ig-

ement is disabled

ement is enabled all the

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Table 1-7 Boot Setup Power Savings Menu

Item Function

Hard Disk Time-out

Video Time-out

Cover Switch Control

Serial Port Ring Resume

This option allows which power to the hard drive is shut down. Possible values include

When not disabled, the hard drive will shut off after the preset time of inactivit s computer’s operation as it waits for the hard drive to power up again.

Set this option to be spinning.

This option allows board and mouse is inactive before the screen is turned off.

Possible values include Note: If you use “screen saver” software, the

should be set to This option allows

which occurs when the display panel is closed. Select

when the LCD Panel is closed. Select

when the LCD Panel is closed. This option allows

call is received from the serial port modem. Select Select On, the computer will resume. This feature does not apply to PCMCIA port modems.

Disabled, 1, 2

. The hard drive will activate again when the

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

Disable

Disabled

SUSPEND

Backlight Off

Off

, the computer will not resume.

, the computer enters the SUSPEND Mode

Introduction 1-19

ou to select a specific time-out value after

, 4, 8, or

ou to specify a length of time the key-

ou to effectively program the type of event

, the s

ou to resume the system if an incomin

16 minutes

ou want the hard drive to always

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

stem will power down the LCD

Video Monitor

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 48MB. This section provides the settings needed as well as illustrations for upgrading the system.

MEMORY UPGRADE PROCEDURE

The NEC Versa notebook allows you to install and expand the on-board 8MB 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 4MB, 8MB, and 16MB DIMM modules.

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1-20 Introduction

For NEC Versa 2400 Series Notebooks, the following memory configurations are applicable:

Table 1-8 8 MB Memory Configurations

On-Board Memory Extra Socket Total Memory

8MB empty 8MB 8MB 8MB 16MB 8MB 16MB 24MB 8MB 24MB 32MB 8MB 32MB 40MB

Table 1-9 16 MB Memory Configurations

On-Board Memory Extra Socket Total Memory

16 MB empty 16 MB 16 MB 8 MB 24 MB 16 MB 16 MB 32 MB 16 MB 32 MB 48 MB

To upgrade the memory in the notebook, follow the steps mentioned below:

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

Remove the hinge covers, status bar cover, and the keyboard from the top of the unit and locate the memory expansion sockets.

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

Hold the memory module with its golden teeth connector pointed towards the memory socket. Incline the module at 60-degreesand gently attached it to the memory socket by pushing it forward.

Slowly push the module downwards until the locking tabs snap into the retaining notches or holes at each corner of the module.

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

Reconnect the AC adapter and reattach the battery pack to the computer.

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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 to run the SETUP program and save the CMOS settings anew. The computer will automatically adjust 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 partition must be of a size sufficient to store the content of the whole memory size.

SYSTEM BIOS UPGRADE PROCEDURE

The NEC Versa 2400 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

“ grading the LCD Panel or adding modifications to the computer’s hardware function. To upgrade the System BIOS:

”. Update the system BIOS whenever you are up-

Introduction 1-21

Copy the

BIOS ROM file to the hard disk subdirectory. You can also choose to run the program from the floppy diskette.

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

puter. When booting the 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. At the DOS prompt, type “

BIOS programming utility. The computer will then prompt you again before starting to update the system BIOS. After programming is complete, the system will prompt you to reboot the computer to activate the new system BIOS.

PHLASH.COM & PLATFORM.BIN

PHLASH <

BIOSfilename

BIOS utility program and the

.ROM>

” to activate Flash

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Section 2

General Specifications

The following table lists NEC Versa 2400 Series system specifications.

Table 2-1 NEC Versa 2400 Series Specifications

ITEM SPECIFICATION

CPU Pentium P54CSLM-100MHz

TCP Package Pentium P54CSLM-133MHz TCP Package

System RAM 8MB On-board

Upgradeable to 40 MB on 240X model or 48 on 243X model

Memory Modules: 8MB/16MB/24MB/32MB RAM Module Slot Two Slots System Management

Power Management

2M (256K x 8) Flash BIOS:

Includes System and VGA

Shadow BIOS Capability

Operation Modes:

Full On Mode

Doze Mode

Standby Mode

5V Suspend Mode

0-volt Suspend Mode

Peripheral Automatic Power Down

Cover Switch Support

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2-2 General Specifications

Table 2-1 NEC Versa 2400 Series Specifications

ITEM SPECIFICATION

Hard Disk Drive 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

810MB/1GB CD-ROM Removable CD-ROM Module

6x speed Floppy Disk Drive Removable FDD Module

720KB/1.44MB Mode Support (Overseas version) Display 11.3” DSTN Color LCD Module:

800 x 600 in 256 colors

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 1MB as Standard

5V EDO 60NS DRAM 40-Pin SOJ PCMCIA Slots Two Type II slots or one Type III slot

PCMCIA Socket compatible with CARD BUS standard Pointing Device Glide Pad

PS/2 Interface Keyboard Keyboard Layout:

US Layout - 87 Keys

European Layout - 88 Keys

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Table 2-1 NEC Versa 2400 Series Specifications

ITEM SPECIFICATION

General Specifications 2-3

Hot-Key

Operation

I/O Port 25-pin Parallel Port

Fn + F8 = Volume Mute

Fn + Esc = Suspend Control

Fn + <right> = Contrast Up

Fn + <left> = 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

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 2400 Series Specifications

ITEM SPECIFICATION

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 (Blanking)

5V Suspend Mode (Blanking)

Internal LED

Battery Charge

PCMCIA A/B Slot - Read / Write

HDD / FDD / CDROM - 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

Batter

(Total - 42W)

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

Battery Fast Charge (Single Battery Pack)

Machine On: 6 hours maximum

Machine Off: 3 hours maximum Heat Dissipation Heat Pipe Dimension 297mm (L) x 240mm (W) x 50.8mm (H)

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Table 2-1 NEC Versa 2400 Series Specifications

ITEM SPECIFICATION

Optional Items External Battery Charger

Port Replicator Key Components 11.3” Color DSTN SVGA LCD: LMG9910ZWCC Hitachi

CD-ROM:

CDR-N16-P San

CD-46E TEAC

810MB HDD or 1GB HDD

FDD, NEC FD1238H

board:

87/88 Key Full Size (Win95)

Controller: Mitsubishi M38813M4

Glide Pad:

TM1002S-D Synaptics

Batter

Sanyo Ni-MH 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: Ome

Decoder: Omega OM82C28

Power Switch: Micreel MIC2563-1

BIOS: Phoenix

IR Chip: TemicTFDS3000

Audio Chip: ESS 1788

Regulor: NS LP2952

RS232 Driver: MAXIUM MAX213

Flash ROM: AMD AM29F002T

PWM Controller: MAXIUM MAX797

o, or

a 82C094

General Specifications 2-5

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2-6 General Specifications

PRODUCT MIX

The following table lists the NEC Versa 2400 Series product mix.

Table 2-2 Product Mix

240XD (RT4) 240XCD (RT4CD) 243XCD (RT4CD)

CPU Pentium / 100MHz

P54CSLM(TCP) /

Intel On-Board DRAM 8 MB 8 MB 16 MB Video RAM 1 MB 1 MB 1 MB HDD 810 MB 1 GB 1 GB LCD 11.3” DSTN LCD 11.3” DSTN LCD 11.3” DSTN LCD FDD Removable Removable Removable CD-ROM None 6X 6X Battery Pack Type A

3500mAH NiMH Pointing Device Glide Pad Glide Pad Glide Pad PCMCIA 2 x Type II / 1 x Type

III Keyboard 87/88 Keyboard

(Win95) EPP/ECP Parallel Yes Yes Yes Serial Port Yes Yes Yes

Pentium / 100MHz P54CSLM(TCP) / Intel

Type A 3500mAH NiMH

2 x Type II / 1 x Type III

87/88 Keyboard (Win95)

Pentium / 133MHz P54CSLM(TCP) / Intel

Type A 3500mAH NiMH

2 x Type II / 1 x Type III

87/88 Keyboard (Win95)

VGA Port Yes Yes Yes PS/2 Port Yes Yes Yes DC-in Jack Yes Yes Yes Audio Port Yes Yes Yes IR Port Yes Yes Yes Expansion Port Yes Yes Yes Power Code Yes Yes Yes

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SYSTEM BOARD SPECIFICATIONS

The following table lists system board specifications.

Table 2-3 Main Board Specifications

ITEM SPECIFICATION

Clock CPU DRAM Video RAM System Chipset

VGA PCMCIA

Internal Connector & Socket

External

∗

NS Clock Buffer CGS74CT 2524

∗

PGA Socket

∗

1M x 16-bit DRAM x 4

∗

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

∗

Omega 82C094, 208 Pin, TQFP

∗

Omega 82C028, 28 Pin SOIC

To System PCB: 100 Pin, AMP To HDD: 50 Pin, KEL To CDROM: 40 Pin, KEL 2 Pin, Molex To Transfer PCB: 2 Pin, Molex To DC Converter 32 Pin, Suyin COM1:

General Specifications 2-7

Connector

PCB Thickness: 1.2mm

9 Pin, Suyin Printer: 25 Pin Docking: 160 Pin

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 batter 100Pin, AMP

PCB Thickness: 1.2mm

Layers: 4

CONVERTER BOARD SPECIFICATIONS

The following table lists Converter board specifications.

Table 2-5 Converter Board Specifications

ITEM

Internal Connector To I/O PCB:

External Connector To Y-Cable Connector:

PCB Thickness 1.2mm

∗

SPECIFICATION

32 Pin, Suyin

Battery:

To 1

10 Pin, Suyin

32 Pin, Suyin To AC Adapter 2 Pin

Layers: 6

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LED INDICATOR BOARD

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

General Specifications 2-9

50 Pin, KEL

To Inverter

8 Pin, Molex

To Left Speaker

2 Pin, Molex

To Right Speaker

2 Pin, Molex

External Connector To Headphone

5 Pin, Suyin To Line-In 5 Pin, Suyin 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

The following table lists I/O board specifications.

Table 2-7 I/O Board Specifications

ITEM SPECIFICATIONS

Clock Crystal 14.318MHz, DIP Type

Crystal 32.768KHz, DIP Type

Crystal 4MHz, DIP Type

Generator:

AV9154-43, SOP 16 Pin

ROM Flash ROM for BIOS

256K x 8, 150ns System Chip Set UMC UM8886BN, 208 Pin, PQFP Super I/O NS87336, 100 Pin, PQFP Keyboard Controller Mitsubishi 38813M4, 64 Pin, QFP Micro Controller PIC16C62, 28 Pin, SOIC RCT Battery VARTA 60mA, 3.6V NiMH Battery Audio ES17888 Sound Chip, 100 Pin, PQFP Amplifier ROHM BA77786FS, 25 Pin, SOIC

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Table 2-7 I/O Board Specifications

ITEM SPECIFICATIONS

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

General Specifications 2-11

To Transfer PCB

40 Pin, Suyin

To DC Converter

32 Pin, Suyin External Connector COM1

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

The following table lists LCD inverter board specifications.

Table 2-8 LCD Inverter Board Specifications

ITEM Specification

Color Inverter Hitachi 11.3” DSTN

LMG9910ZWCC Input Voltage 8V to 20V Output Voltage 500VAC Max. Contrast Voltage Output Load Current Brightness Contro Contrast Control Efficiency Unit Size (L x W x H) 146 (L) x 22.5(W) x 9.5 (H)

28V ~ 31V

6mA (Max.)

VR Type (Lower)

VR Type (Upper)

70% Min.

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LED STATUS INDICATORS

The following table lists NEC Versa 2400 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 Read / Write

PCMCIA Slots

General Specifications 2-13

Num Lock

Caps Lock

Scroll Lock

FDD SPECIFICATION

The following table lists the standard diskette drive specifications.

Table 2-10 FDD Specifications

ITEM

Module 3.5” Module

Specification

Mode 2 Mode FDD (1.44MB / 720KB) Unit Size 110mm (L) x 96mm (W) x 12.7mm (H)

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2-14 General Specifications

HDD UNIT SPECIFICATION

The following table lists the standard hard drive specifications.

Table 2-11 Hard Disk Drive Specifications

ITEM SPECIFICATION

Module 2.5” Removable HDD Module Capacity 810MB / 1 GB Interface Enhanced IDE Interface Unit Size 100mm (L) x 70mm (W) x 12.7mm (H)

CD-ROM SPECIFICATION

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

Table 2-12 CD-ROM Reader Specifications

ITEM SPECIFICATION

Module 6X CD-ROM Mode IDE Interface Data Transfer 13.3MB/sec Unit Size 140.5mm (L) X 130.6mm (W) X 17.0mm (H)

NIMH BATTERY PACK SPECIFICATION

The following table lists the standard battery specifications.

Table 2-13 Battery Specifications

ITEM SPECIFICATIONS

Capacity 3500 mA x 10 cells Cell Type Long A Voltage 12V Connector 10-Pin

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DC/DC CONVERTER & BATTERY CHARGER SPECIFICATION

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

Table 2-14 DC/DC Converter & Battery Charger

ITEM SPECIFICATION

Input Voltage 9V -> 20V Output Voltage 12V, 5V, 3.3V Output Current 0.1A, 2.5A, 2.5A

General Specifications 2-15

Output Ripple Voltage

Protection Short Circuit Protection, OCP

Efficiency 80% Min. (Typ.) PCB 1.2mm / 6 Layers

150mV, 100mV, 100mV

Input under voltage latch

BATTERY CHARGER

The following table lists battery charger specifications.

Table 2-15 Battery Charger Specifications

ITEM SPECIFICATION

Input Voltage 20V (Max.) Support Battery NiMH Battery (12V) Protection Max. Temp., Max. Timer Charge Method

Max. Temperature

Delta T / Delta t: 1

C ~ 60 oC

C (min.)

Timer Setting 360 Min. Charge Time Machine On: 6 hours

Machine Off: 1.5 hours Charge IC BQ2014 Connector To M/B:

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

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2-16 General Specifications

KEYBOARD

The following table lists keybord specifications.

Table 2-16 Keybord Specifications

ITEM SPECIFICATION

Key Switch Type Membrane Key Stroke Operating Force Key Pitch 19.05mm

3.0 ± 0.5mm

50 ± 20GF

AC/DC ADAPTER

The following table lists AC/DC adapter specifications.

Table 2-17 AC/DC Adapter Specifications

ITEM SPECIFICATION

Input Voltage AC 90V -> 265V, 50 -> 63Hz Ripple Noise 100mvp-P Output Voltage 20V Max. Protection Short Circuit UVP, OVP AC Cord Safety Approval, FCC Shielding AC cord DC Output Cable 2-pin, 100cm long with coil at system end Indicator AC Power On Unit Size 120mm (L) x 62mm (W) x 36mm (H)

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BIOS

The following table lists BIOS specifications.

Table 2-18 BIOS Specifications

ITEM Specification

Floppy Disk Drive Support standard 3.5” FDD

Support 720KB and 1.44MB Modes Hard Disk Drive Support Standard IDE Hard Disk

Auto-detect IDE Features

Support LBA mode for larger capacity VGA Display Use Chips OC65548 VGA BIOS to support Monitor Sense or Auto

Display

General Specifications 2-17

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 Shadow & Cache Always enable VGA and System BIOS Shadow PCMCIA Phoenix PCM Plus will be provided

PCMCIA 2.1 Spec Compliance External Device

Support

CD-ROM Can save power during Suspend Mode APM Supports APM 1.1 Specification Power Management

Support

Interface of external PS/2 mouse and external keyboard

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

is connected

Full On Mode

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

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-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

Keyboard Type US Keyboard: 87 Keys

European Keyboard: 88 Keys

Support WIN95 extra 3 Keys External Device

Support

Y-Connector Support External PS/2 Mouse and External Keyboard can be used LED Connector Num Lock, Caps Lock & Scroll Lock Status should be kept durin

System Peripheral Control

Internal and External Keyboard can be used simultaneously.

Internal Glide Pad and External PS/2 Mouse can be used

Simultaneously

Suspend Process.

All the above should be cleared while Power On

Support AC-IN, Batter

Status LED

Support the Audio/Contrast/Brightness control

Support the Backlight control

-Charging, Battery-Low, Suspend-To-RAM

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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POWER MANAGEMENT FEATURES (MODE DEFINITION)

The following table lists power management specifications.

Table 2-20 Power Management Modes

Mode Device Speed

General Specifications 2-19

Full-On Mode CPU State

Peripherals State Doze Mode Timer

CPU State

DRAM State

Peripherals State

Activity Events

Standby Mode Timer

CPU State

DRAM State

VGA State

Audio State

AMP Circuit

HDD State

LCD state

Activity Events

Full speed

Normal On / Off

Stop Grant State Slow Refresh Normal Video Monitorin

FDD, HDD, Com1, Com2, Lpt2, Audio

Off/1/2/4/8/16 Min. Stop Clock Slow Refresh Standby Power Down Power Down Power Down Backli

Off Video Monitoring, Keystrokes,

FDD, HDD, Com1,Com2, Lpt1, Audio

ht Off, Negative Volt.

, Keystrokes,

Suspend To RAM Timer

CPU State

DRAM State

LCD State

VGA, HDD, I/O Chip, PCMCIA,

Audio, AMP Circuit, KBC, Clock

Generator

Power-On Group

Activity Events

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Off/1/2/4/8/16 Min Stop Clock Slow Refresh Backlight off, Negative Volt. Off Power Down

UM8890BN

board, Power, Com1,

Ke 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 Off Off Micro-Controller Power Switch CPU Clock/2 Backlight On (Lower 25%) Off

Off

Battery Low Condition

Battery Low / Low Condition

CPU State

Power System

Power-On Group

Activity Events

CPU State

LCD State

CPU State

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 X 1 X 2 Doze 3 X 4 5 Sleep 6 X X 7 Suspend 8 X X X

O current Condition:

Doze Mode Time-Out

APM CPU-Idle

APM Power Management Event: System Suspend Request Notification

Battery Low - Low Condition

Suspend Events Occurs

Fully-On Activity Events Occur

Sleep Mode Time-Out

Sleep Timer Disabled and Suspend Mode Time-Out

Battery Low - Low Condition

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Fully-On Activity Events Occur

10.

Suspend Mode Time-Out

11.

Battery Low - Low Condition

12.

Resume Events Occur

13.

HOT KEY DEFINITION

The following table lists hot key definitions.

Table 2-22 Hot Keys

FUNCTION KEY CONTENT

<Fn> + <Esc> Suspend

General Specifications 2-21

<Fn> + <F10> LCD/CRT/SIMUL. Display <Fn> + <F11> Panel Backlight On/Off <Fn> + <F8> Sound Mute <Fn> + <right> Contrast Up <Fn> + <left> Contrast Down <Fn> + <PgUp> Speaker Volume Increases <Fn> + <PgDn> Speaker Volume Decreases <Fn> + <up> Brightness Increases <Fn> + <down> Brightness Decreases <Num> Numeric Lock

ENVIRONMENTAL SPECIFICATION

The following table lists appropriate operating temperatures.

Table 2-23 Environmental Specifications

ITEM SPECIFICATION

Operating Mode Non-Operating

∗

C ~ 35 oC (80%)

∗

-20

C ~ 60 oC (90%)

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2-22 General Specifications

POWER SOURCE

The following table lists system power specifications.

Table 2-24 Power Specifications

Input Nominal Version

AC Voltage 100 ~ 250 V 90 ~ 265 V AC Frequency 50 / 60 Hz 47 ~ 63 Hz

VIBRATION

The following table lists vibration specifications.

Table 2-25 Vibration Specifications

ITEM MODE

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

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SHOCK

The following table lists system shock specifications.

Table 2-26 Shock Specifications

ITEM MODE

Operating Mode Impact Accelerator: 1g/10g 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 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

General Specifications 2-23

ELECTRO-STATIC DISCHARGE (ESD)

The following table lists static discharge specifications.

Table 2-27 Electro-static Discharge Specifications

ITEM SPECIFICATION

Contact Discharge Air Discharge HCP VCP

±2, 4, 8, 12.5, 15 kV

±2, 4, 15 kV

±2, 4 kV

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Section 3

Hardware Functional Overview

The NEC Versa 2400 Series notebooks consist of several major functions and subsystems including:

system BIOS - implemented on the system board and EPROM



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 assembly



PCMCIA controller and sockets - implemented on the system board



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



hard disk subsystem - implemented on the system board and the hard drive assembly



floppy disk subsystem - implemented on the system board and the floppy drive



power subsystem - implemented on the power supply board, inverter board, battery 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 2400 Series functional diagram.

FLASH BIOS

256KB

Bank 0

8MB

(on-board)

Bank 1

8, 16MB

(DIMM)

Pentium

P54CSLM-

100MHz

CORE CHIP

UMC

UM8891BF-N,

UM8892BF-N,

UM8886BF-N

VGA CHIP

C&T 65548

PCMCIA OMEGA 82C094

CONTROLLER

MITSUBISHI

M38813M4

VIDEO RAM

1MB

CARD 0

CARD 1

GLIDE PAD

EXT. KB/MOUSE

INTERNAL KB

COM1

PRINTER

SUPER I/O

NS PC87336VLJ

HDD

LCM

INVERTER

14.318MHz X'TAL

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CRT ON

ADAPTER

66MHz

CLOCK GEN

ICS

AV9154-43

24MHz

14.318MHz

BATTERY IN

Figure 3-1 Functional Block Diagram

DC/DC

CONVERTER

DC-IN

FDD

+3.45V

+5V

+12V

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SYSTEM BIOS

In AT-compatible systems, configuration data must be stored somewhere when the computer is turned off. This data is usually stored in the CMOS RAM. Unlike the DRAM, used for system memory, the CMOS RAM requires very little power. When the computer is turned off, a back-up battery powers the CMOS RAM, which retains the system parameters. The computer is configured with the values stored in the CMOS RAM by the system BIOS, which gains control when the computer is powered on.

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

The NEC Versa 2400 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 EPROM chip with the system BIOS.

Hardware Functional Overview 3-3

The EPROM chip also includes BIOS Power-On Self Test (POST) diagnostic and booting 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 P54LM-100MHz 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 compatible 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

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3-4 Hardware Functional Overview

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.

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

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Memory Controller -



 Supports ROM DOS up to 64MB by XIP, 16MB by EMS  Supports Shadow RAM from C0000-FFFFF  Supports SLOW and SELF Refresh DRAM  Supports Stagger Refresh  On-board memory up to 48MB  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

Hardware Functional Overview 3-5

 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 Key  Auto-Wake Up Function  Three Low Battery Monitor Input  System Operating Voltage from 3V to 5.5V  Low Power Consumption (at 3.3V)

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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 240X notebooks contain 8MB (16MB for NEC Versa 243X) of 70ns page-interleaved DRAM on the System board. The notebook provides one extra memory slot for upgrading the DRAM memory to 8MB, 16MB, 24MB, 32MB, 40MB, & 48MB for the NEC Versa 2400 Series) using standard JEDEC 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 2400 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 1.44MB floppy disk drives



Supports IBM PC/AT interface to IDE (Intelligent Drive Electronics)-type Winchester 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 24MHz crystal needed



100-pin plastic flat package

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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 1MB 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 notebook 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.

Hardware Functional Overview 3-7

Features Summary:



Highly integrated design (flat panel/CRT VGA controller, RAMDAC, clock synthesizer)



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 256Kx16 DRAMs (1MB)



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 2400 Series notebooks provide a 15-pin female D-type external VGA connector 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 2400 series with 1MB video memory. The NEC Versa 2400 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 G10 LapKat keyboard controller chip.

The NEC Versa 2400 Series keyboard is an 87/88-key, IBM enhanced-type keyboard with standard characters and function keys plus 12 programmable function keys and the Special Function (Fn) key. 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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PCMCIA CONTROLLER AND SOCKETS

The PCMCIA controller is implemented on the system board using Omega’s 82C094 Interface Controller. The 82C094 is compatible with the Intel i882092AA PCI to PCMCIA controller chip. It supports two independent 68 pins PC card sockets and is register compatible with Intel’s 82365SL.

The NEC Versa 2400 Series notebook incorporates PCMCIA double deck slots that supports insertion of two Type I or 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

Hardware Functional Overview 3-9



Direct connection to 33MHz 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

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3-10 Hardware Functional Overview

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 2400 Series notebook is equipped with high capacity hard disk drive ranging from 810MB to 1.4GB using the IDE controller with LBA (Logical Block Addressing) mode support. The I/O subsystem controller, NS PC87336CLJ, provides the IDE controller for the hard disk.

The built-in hard drive 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 programs that auto-detects the installed hard disk type settings for optimized performance.

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.

FLOPPY DISK DRIVE SUBSYSTEM

The Floppy Disk Drive Subsystem consists of a FDD controller provided by SMC 37C665IR and the built-in floppy disk drive. The floppy disk drive supports standard

3.5-inch 720KB and 1.44MB mini-diskettes.

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 Motherboard. An external PS/2 port also supports the use of an external 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



Powerboard (on Motherboard)



LCD Inverter Board (in LCD Panel Assembly)



Power Conservation Logic (part of Motherboard)

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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.

Internal Battery Pack

The NEC Versa 2400 Series notebooks utilizes NiMH (Nickel Metal-Hydride) that provides DC power for the notebook (and for the NVRAM and real time clock battery on the Motherboard) when the AC Adapter is not connected to the computer.

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 recharge 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.

Hardware Functional Overview 3-11

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 Powerboard 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 2400 Series notebook computers. The first part of this section will describe the computer cleaning procedures and preferred handling procedures for sensitive components (i.e. disk drives, batteries).

The second part of this section will identify all field replaceable parts plus the removal and replacement procedures for these parts.

PREVENTIVE MAINTENANCE

Preventive maintenance is limited to cleaning the plastic case, the keyboard, the display screen, and the floppy drive heads as required.

NOTE: Remove the battery and disconnect the AC adapter before performing any maintenance. Voltage will still 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.

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

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 indicator panel. Do not use solvents or strong, abrasive cleaners on any part of the system.

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 damage the components under the keys. If the keyboard gets wet, thoroughly dry it before reassembling the system unit.

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4-2 Field Service Guidelines

Cleaning the Notebook’s Interior

When servicing the inside of the notebook to remove dust and other foreign particles proceed as follows:

Remove the top cover, hinge covers, status bar, and keyboard using the disassembly procedures discussed later.

Dust or vacuum (with a rubber-tipped nozzle) the inside of the system unit, particularly the system board surface. Use care to avoid damaging or dislodging any components or cables.

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 periodically on floppy diskettes. Occasionally use a head-cleaning diskette in the floppy disk drive to prolong 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, importantly 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 Utilities 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 ensure 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:



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

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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 will eliminate this potentiality damaging situation.

Field Service Guidelines 4-3

REQUIRED TOOLS AND EQUIPMENT

All NEC Versa 2400 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:

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

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.

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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Removing/Replacing the Hard Disk Drive Module

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

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

You will find a clamp latch (lock knob) that is securing the hard disk drive module to the system unit. To remove the hard disk drive module, push the lock knob sideways with one hand and with the other hand pull the hard disk drive module out. Note that this has to be done simultaneously.

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.

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

Field Service Guidelines 4-5

Figure 4-1 Hard Drive Module Assembly

Removing/Replacing the Floppy Disk Drive Module

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

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

You will find a clamp latch (lock knob) that is securing the floppy disk drive module to the system unit. To remove the floppy disk drive module, push the lock knob sideways with one hand and with the other hand pull the floppy disk drive module out. Note that this has to be done simultaneously.

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.

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4-6 Field Service Guidelines

To replace the floppy drive unit, remove the four small screws attaching it to the

null floppy disk drive assembly and remove the floppy disk drive cable. To replace the floppy disk drive module, reverse the above procedure.

Figure 4-2 Floppy Drive Module Assembly

Removing/Replacing the LCD Status Bar Cover and Hinges

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

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

start of this section. Slide the left and right hinge covers out to remove them.

Lift the status bar cover out.

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

dures mentioned above.

Removing/Replacing the Keyboard

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

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

start of this section. 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.

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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 keyboard cable out and remove the keyboard from the notebook.

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.

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

start of this section.

Field Service Guidelines 4-7

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:

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

start of this section. 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.

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.

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 disassembly procedure mentioned above.

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4-8 Field Service Guidelines

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

Removing/Replacing the Cover-Display LCD Assembly Module

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

Turn off the computer. Follow all disassembly procedures for removing the Hinge Covers, Status Bar Cover, and Keyboard as mentioned earlier in this section.

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.

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

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.

Turn off the computer and remove the Battery, Hard Disk Drive, and Floppy Disk Drive Modules. Follow all disassembly procedures mentioned from the start of this section.

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.

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

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.

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

tioned above. We recommend that you do 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.

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:

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

start of this section. 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.

Field Service Guidelines 4-9

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 removed from the base unit before being separated from each other. The procedure for removing the system board and I/O board is as follows:

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

start of this section. 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. From the back of the unit remove the six spacers and two screws around the four

plug-in connectors.

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4-10 Field Service Guidelines

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.

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:

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

start of this section. 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. Slowly separate the I/O Board and system board, being cautious about the con-

nectors coupling the two boards together. To reattach the I/O Board and system board, reverse the separation procedures

mentioned above.

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Field Service Guidelines 4-11

Figure 4-5 The I/O Board Module Assembly

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4-12 Field Service Guidelines

Removing/Replacing the Power Board

The procedure for removing the power board is as follows:

Turn off the computer. Follow all disassembly procedures mentioned from the start of this section.

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

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

Figure 4-6 Power Board Module Assembly

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ILLUSTRATED PARTS BREAKDOWN

This section contains the illustrated parts breakdown (IPB) and NEC part numbers for the NEC Versa 2400 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 2400 Series Field-Replaceable Parts*

Item Description Part Number

1 Main Battery (NiMH) 21-90128-31 2 TEAC CD-ROM Assembly 25-00242-00 3 AC Adapter 12-00118-30 4 AC Power Cord 22-30031-00 5 CMOS Battery TBD

Field Service Guidelines 4-13

6 AC/DC Board Assembly 51-70187-10 7 VersaGlide Assembly 51-70185-11 8 Cover, Left Hinge 24-40827-00 9 U.S. Keyboard 71-30335-00 10 LCD Cable Assembly, 11.3” 22-20286-00 11 NEC Model Nameplate, NEC Versa 2400

NEC Model Nameplate, NEC Versa 2400CD 12 LCD Front Panel Assembly, 11.3” 24-40818-00 13 LCD, Hitashi, 11.3” 71-10469N00 14 LCD Inverter 12-00146-00 15 LCD Rear Cover, 11.3” 24-40819-0 16 NEC Logo 25-40851-00

17 Cover, Right Hinge 24-40828-00 18 Status Cover 24-408822-00 19 Top Cover Assembly 24-40821-00 20 CPU, Pentium, 100 MHz

CPU, Pentium, 133 MHz

25-41033-00 25-41034-00

51-90022-10

51-90024-10 21 I/O Port Casing 24-40810-10 22 Audio Cover 24-40826-00

23 LED Board Assembly 51-70184-00 24 System Board 51-70182-00

____________

* This data was prepared September, 1996. For an up-to-date listing of spare parts, please call FastFacts

(800) 366-0476 and order document number 42200167

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4-14 Field Service Guidelines

Table 4-1 NEC Versa 2400 Series Field-Replaceable Parts*

Item Description Part Number

25 I/O Board 51-70183-00 26 I/O Bracket 24-50204-00 27 810 MB Hard Disk Drive Assembl

1 GB Hard Disk Drive Assembly 28 Diskette Drive Assembly 24-70006-00 29 ROM Door 24-40810-10 30 Rubber Foot 24-80631-10 31 Bottom Cover Assembly 24-40793-10

* Not shown in IPB figure.

Speaker 24-80620-00

Left Speaker Cable 22-20279-00

Right Speaker Cable 22-20280-00

Speaker Holder 24-50226-00

Keyboard Bracket 24-50227-00

25-00237-00 25-00238-00

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Field Service Guidelines 4-15

Figure 4-7 NEC Versa 2400 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 2400 Series User’s Guide

819-200134-000 Rev. 00

NEC Versa 2400 Series Service and Reference Manual

Shipping Carton 158-041012-000 Foam Insert 158-041014-000 Foam Insert 158-041014-001

(this guide)

819-200167-000 Rev. 00

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Section 5

Troubleshooting and Repair

This section focuses on providing you with some information on notebook basic troubleshooting 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 Call

To order NEC spare parts In the U.S., call 1(800) 632-4525 To order options in the U.S. Local Sales Office To access the NEC Electronic Bulletin Board

System (BBS) To download files - provides software drivers

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 NSRC (National Service Response Center)

spare parts or technical support

Service Contracts TSC (Technical Support Center)

FastFactsTM - automated service that sends the latest information about NEC products to the fax machine 24 hours a day

Canadian Inquiries 1(416) 795-3554 Technical Support

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

- technical support for everyone else

1(508) 635-4706

- questions other than products,

In the U.S., call 1(800) 366-0476 Outside U.S., 1(708) 860-9500 Ext. 2621

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:

tech-support@nectech.com

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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 answer to you through the Internet or by fax. TSC will reply 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, technical information bulletins, price lists, and other information.

Information can be obtained from the FastFacts service 24 hours a day, 7 days a week. Using 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:

Check that the fax machine is on.

Locate the document part number.

Using a touch-tone telephone, call 1-800-366-0476 (U.S. and Canada only).

For international; enter the international long distance access number, the U.S. telephone number, or the U.S. extension (01-708-860-9500 ext. 2621).

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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.

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 will be automatically sent to your fax machine. If Fast-

Facts 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 will not process the order.

Troubleshooting and Repair 5-3

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 on the LCD Status Bar? Press any key or press the power switch to wake system up again.

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5-4 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 computer 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 notebook’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.

Diskette read failure press F1 to retr for SETUP utility

Display adapter failed, using alternate

Gate A20 failure The keyboard controller is

Fixed disk configuration error

Fixed disk controller failure

Fixed disk read failurepress F1 to retr for SETUP utility

boot, F2

The diskette is either not formatted or is defective.

The primary video adapter failed.

not acceptin specificall and disable A20 command.

The specified

uration is not

confi supported or doesn't match the actual hardware installed.

The fixed disk may be defective.

The fixed disk ma

ured incorrectly or is

confi defective.

command,

, the enable

Check the drive to determine the problem.

Replace the diskette with a bootable diskette and retr

Check the primary video adapter.

Check the ke controller and s Turn the power off, then back

ain. If the problem

on a persists contact qualified NEC service personnel.

Correct the fixed disk configuration.

Try rebooting. If that doesn't work, replace the fixed disk.

Check the drive t in SETUP. Tr that does not work, replace the fixed disk.

board

stem board.

pe selected

rebooting. If

Pointer device failure The PS/2-style mouse

failed.

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Try rebooting. If problem persists, check the mouse, it's cable and connector.

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Table 5-2 POST Error Messages

Message Possible Cause Action

Troubleshooting and Repair 5-5

No boot device available press F1 to retr for SETUP utility

No boot sector on fixed disk - press F1 to retr boot, F2 for SETUP utility

Not a boot diskette - press F1 to retr SETUP utility

No timer tick interrupt The timer chip has failed. Check the system board,

Shutdown failure Either the keyboard

Time of day not set - run SETUP program

boot, F2

boot, F2 for

Either diskette drive A:, the fixed disk, or both the diskette and fixed disk are defective.

The C: drive is not formatted or is not bootable.

The diskette in drive A: is not formatted as a bootable diskette.

controller is not acceptin the reset command or the associated reset lo failed.

Real Time Clock not set. Run SETUP utility.

ic has

rebooting. If problem

Tr persists, replace the diskette or the fixed disk.

Format the C: drive and make it bootable.

Replace the diskette with a bootable diskette and tr rebooting.

Turn the power off, then back

ain. If the problem

on a persists, contact qualified service personnel.

Check the ke controller and s Turn the power off, then back

ain. If the problem

on a persists, contact qualified service personnel.

board

stem board.

Timer 2 failure The timer chip has failed. Check the system board.

Turn the power off, then back

ain. If the problem

on a persists, contact qualified service personnel.

F2 to enter ROM-based SETUP

Invalid configuration information - please run SETUP

Invalid configuration information must be changed.

Displa configured incorrectly.

Memory size is incorrect. Wron

drives.

adapter is

number of diskette

You must run SETUP utilit and correct configuration information.

Run the SETUP utility.

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5-6 Troubleshooting and Repair

Table 5-2 POST Error Messages

Message Possible Cause Action

Keyboard clock line failure The keyboard, the

board cable

ke connection, or the

board controller is

ke defective.

Keyboard data line failure The keyboard controller

firmware has failed.

Keyboard stuck key failure A key is jammed. Locate the jammed key and

Memory failure at

value

, read

expecting

hex-value

hex-

hex-value

Circuitry associated with

the memor failed.

chips has

Make sure the ke cable and ke connected properl the ke the s power off, then back on a contact qualified service personnel.

Check the keyboard controller and s Turn the power off, then back on a persists, contact qualified service personnel.

fix it. Make sure the ke cable and ke connected properl power off, then back on a contact qualified service personnel.

Turn the power off, then back on a persists, contact qualified service personnel.

board controller and

stem board. Turn the

ain. If the problem persists,

ain. If the problem

ain. If the problem persists,

ain. If the problem

board

board are

. Check

stem board.

board

board are

. Turn the

Unexpected interrupt in protected mode

Real time clock failure The RTC or battery failed. Run SETUP and turn the

Hardware interrupt or NMI occurred while in protected mode.

Check the timer chip or the interrupt controller on the system board.

power off and on. If the problem persists, replace the RTC batter remains, contact qualified service personnel.

. If the problem

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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

nnn

K Base Memory The amount of base memory that tested successfully.

nnn

K Extended The amount of extended memory that tested

successfully.

Troubleshooting and Repair 5-7

Memory tests terminated b keystroke

Press the F1 key to continue This message indicates that an error was found durin

Beginning memory test Press the SPACEBAR to terminate the memory test

Press the F1 key to continue, F2 to run the Setup utility

The messa spacebar while memor stopped the memory tests.

POST. Pressing the F1 key allows the system to attempt to reboot.

A user can stop the memor spacebar.

This message indicates that an error was found durin POST. Pressing the F1 key allows the system to attempt to boot. Press F2 allows users to run the ROM-based SETUP utilit information.

e indicate that a user pressed the

tests were running and

tests by pressing the

to correct configuration

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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

Message Cause Action

I/O card parity interrupt at

address

NMI, (R)eboot, other ke continue

Memory parity interrupt at

address

NMI, (R)eboot, other ke continue

Unexpected HW interrupt,

interrupt at address

(R)eboot, other ke continue

Unexpected SW interrupt,

interrupt at address

(R)eboot, other ke continue

Unexpected type 02 interrupt at NMI, (R)eboot, other ke continue

. Type (S)hut off

xxxxh

. Type (S)hut off

s to

. Type

s to

. Type

s to

Memor has failed.

A memory chip(s) has failed. Replace the system board.

Hardware problem. Not displa interrupt handler is not enabled.

Error(s) in the software pro extended interrupt handler is not enabled.

A parit the source can not be determine.

on a peripheral card

ed if the expected

ram. Not displayed if the

error occurred, but

Check the memory cards installed in the system.

Check all hardware in the system.

Turn the machine off and then on a work, check the program.

Turn the power off and then on again.

ain. If doesn’t

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QUICK TROUBLESHOOTING

This section summarizes problems that may develop during system operation and lists suggested 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 s adapter is plu power outlet.

Troubleshooting and Repair 5-9

stem. Also, that the AC

ed into a properly grounded AC

If usin if the batter and is inserted correctly.

Check the power board of the s inserted into the s properly? Otherwise, replace the power board.

Data on the LCD is unreadable Adjust the brightness and contrast displa

controls found on the right side of the LCD panel. Check if the LCD cables are inserted properl

Check also connections inside the LCD panel. Check if installed VGA driver is correct. Check VGA controller chip on the s

if there is any cold or loosed soldering. Replace the system board.

LCD screen does not show data Check the LCD Status Bar if Suspend mode is

activated. Press an button to resume operation and display.

Check if LCD cables are disconnected or loosed. Check if the displa

external monitor.

the battery as main power source, check

pack is of the right type, charged

stem. Is it

stem board connector

stem board

key or press the power

output is switched to the

Check if the Contrast level is set to minimum. Check if there is power. Replace LCD Inverter board found inside the

LCD Panel.

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5-10 Troubleshooting and Repair

Table 5-5 Quick Troubleshooting

Problem Corrective Actions

Battery Power does not last Make sure that the power management features

are enabled.

Rechar using again.

Replace the battery pack.

System halts during boot sequence Check condition of selected bootload device

(diskette or hard disk) for bad boot track or incorrect OS files.

Tr recopy or repartition hard disk.

Check for any BIOS error messages on the display screen.

Replace system board.

I/O processing malfunctions Check the connections of all internal devices.

Replace system board.

Diskette drive does not work Check if floppy drive cable is connected

properly. Check diskette type if correct and not faulty. Replace diskette drive. Replace system board.

e the battery pack for 1½ hour before

booting from a new bootable diskette and

Hard disk drive malfunction Check if hard disk drive is set properly on CMOS

SETUP. Check drive cables and connections. Check if 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 properl off system first before plugging in the device.

Replace the keyboard or mouse. Replace the system board.

. Check Y-cable if it is being used. Power

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Table 5-5 Quick Troubleshooting

Problem Corrective Actions

PCMCIA card does not work Check the PCMCIA driver installation for an

IRQ or IO address conflict.

Check if the PCMCIA card is inserted properl and all connections are set.

Replace the PCMCIA card.

Replace the system board.

Trackball doesn’t work Check if trackball is enabled under CMOS Setup.

Check if PS/2 mouse driver is properly installed.

Troubleshooting and Repair 5-11

Check trackball cable inside the s inserted properly.

Remove trackball ring cover and clean the ball and the rollers inside.

Replace trackball module. Check the ke

or loosed soldering. Replace the system board.

Serial device does not work If using serial mouse, check if trackball option is

disabled under CMOS Setup. Check if mouse driver is installed properly. Check if serial device is connected properly. Replace serial device. Check the I/O controller chip on the s

board for any cold or loosed soldering. Replace the system board.

Parallel device does not work Check if all connections are properly set.

Check if external device is turned on. Check I/O controller chip on the s

any cold or loosed soldering. Replace the system board.

board controller chip for any cold

stem if it is

stem

stem board for

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Appendix A

Video Modes

The C&T 65548 VGA chipset supports high resolution fixed frequency and variable frequency analog monitors in interlaced and non-interlaced modes of operation. Digital monitor 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

0, 1 16 40 x 25

2, 3 16 80 x 25

7 Mono 80 x 25

No. of Colors

Text Display

40 x 25

80 x 25 80 x 25

Font Size

9 x 16

8 x 14

8 x 8

9 x

8 x

8 x 8

9 x

Pixel Resolution

360 x 400

320 x 350

320 x 200

720 x 400 640 x 350 640 x 200

720 x 400 720 x 350 720 x 350

Dot Clock MHz

28.322

25.175

28.322

Horiz. Freq. KHz

31.5 70

Vert. Freq. Hz

31.5 70

25.175

28.322 31.5 70

9 x 8

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A-2 Video Modes

Table A-2 VGA Standard Modes (Graphics Mode)

Hex Mode

4 4 40 x 25 8 x 8 320 x 200 25.175 31.5 70 5 4 40 x 25 8 x 8 320 x 200 25.175 31.5 70 6 2 80 x 25 8 x 8 640 x 200 25.175 31.5 70

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-3 VGA Standard Modes (Planar Mode)

Hex Mode

D 16 40 x 25 8 x 8 320 x 200 25.175 31.5 70 E 16 80 x 25 8 x 8 640 x 200 25.175 31.5 70 F Mono 80 x 25 8 x 14 640 x 350 25.175 31.5 70 10 16 80 x 25 8 x 14 640 x 350 25.175 31.5 70 11 2 80 x 30 8 x 16 640 x 480 25.175 31.5 70

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

12 16 80 x 30 8 x 16 640 x 480 25.175 31.5 70

Table A-4 VGA Standard Modes (Packed Pixel Mode)

Hex Mode

13 256 40 x 25 8 x 8 320 x 200 25.175 31.5 70

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

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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)

Video Modes A-3

Hex Mode

60 16 132 x 25 8 x 16 1056 x 400 40.0 30.5 68 61 16 132 x 50 8 x 16 1056 x 400 40.0 30.5 68

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-6 VGA Extended Modes (4-Bit Linear Mode)

Hex Mode

20 16 80 x 30 8 x 16 640 x 480 25.175 31.5 60 22 16 100 x 37 8 x 16 800 x 600 40.0 37.5 60 24 16 128 x 48 8 x 16 1024 x 768 65.0 48.5 60 24I 44.9 35.5 43

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-7 VGA Extended Modes (8-Bit Linear Mode)

Hex Mode

30 256 80 x 30 8 x 16 640 x 480 25.175 31.5 60 32 256 100 x 37 8 x 16 800 x 600 40.0 37.5 60 34* 256 128 x 48 8 x 16 1024 x 768 65.0 48.5 60 34I* 44.9 35.5 43

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-8 VGA Extended Modes (15-Bit Linear Mode)

Hex Mode

40* 32K 80 x 30 8 x 16 640 x 480 50.350 31.5 60

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

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A-4 Video Modes

Table A-9 VGA Extended Modes (16-Bit Linear Mode) - 1MB Video

Memory Only

Hex Mode

41 64K 80 x 30 8 x 16 640 x 480 50.350 31.5 60

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-10 VGA Extended Modes (24-Bit Linear Mode)

Hex Mode

50* 16 80 x 30 8 x 16 640 x 480 65.0 27.1 51.6

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-11 VGA Extended Modes (Planar Mode)

Hex Mode

6A, 70 16 100 x 37 8 x 16 800x 600 40.0 38.0 60 72, 75 16 128 x 48 8 x 16 1024 x 768 65.0 48.5 60 72, 75I 44.9 35.5 43

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-12 VGA Extended Modes (Packed Pixel Mode)

Hex Mode

78 16 80 x 25 8 x 16 640 x 400 25.175 31.5 70 79 256 80 x 30 8 x 16 640 x 480 25.175 31.5 60 7C 256 100 x 37 8 x 16 800 x 600 40.0 37.5 60 7E* 256 128 x 48 8 x 16 1024 x 768 65.0 48.5 60 7EI* 44.9 35.5 43

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

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VGA HIGH REFRESH MODES

The following tables list VGA high refresh modes.

Table A-13 VGA High Refresh Modes (Packed Pixel Mode)

Video Modes A-5

Hex Mode

30 256 80 x 30 8 x 16 640 x 480 31.5 37.5 75 32* 256 100 x 37 8 x 16 800 x 600 49.5 46.9 75

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-14 VGA High Refresh Modes (Planar Mode)

Hex Mode

12 16 80 x 30 8 x 16 640 x 480 31.5 37.5 75 6A, 70 16 100 x 37 8 x 16 800 x 600 49.5 46.9 75

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

Table A-15 VGA High Refresh Modes (Packed Pixel Mode)

Hex Mode

No. of Colors

Text Display

Font Size

Pixel Resolution

Dot Clock MHz

Horiz. Freq. KHz

Vert. Freq. Hz

79 256 80 x 30 8 x 16 640 x 480 31.5 37.5 75 7C* 256 100 x 37 8 x 16 800 x 600 49.5 46.9 75

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NEC versa 2400 schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

Contents

Abbreviations

Introduction

General Specifications

Hardware Functional Overview

Field Service Guidelines

Troubleshooting and Repair

Video Modes