Service_Manual_-_NEC_Versa_2400_Series_Laptop.pdf

PROPRIETARY NOTICE AND LIABILITY DISCLAIMER

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

the valuable property of NEC Corporation (NEC) and/or its licensors. NEC and/or its licen-

sors, as appropriate, reserve all patent, copyright and other proprietary rights to this docu-

ment, including all design, manufacturing, reproduction, use, and sales rights thereto, except

to the extent said rights are expressly granted to others.

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

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

each such product is dependent upon factors such as system configuration, customer data,

and operator control. Since implementation by customers of each product may vary, the

suitability of specific product configurations and applications must be determined by the

customer and is not warranted by NEC.

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

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

thereof without prior written approval of 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 product, brand, or trade names used in this publication are the trademarks or registered

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

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 man-

ual is written for NEC-trained customer engineers, system analysts, service center person-

nel, and dealers.

The manual is organized as follows:

Section 1 ¾ Introduction , provides an overview of the hardware and interface compo-

nents.

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.

Field Service Guidelines , provides system disassembly procedures, and an

exploded-view diagram with corresponding part numbers.

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.

Section 2

Section 4

Section 5

iii

Contents

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

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

Section 1 Introduction

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

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

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

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

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

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

Status Panel and Power Indicator ................................................................... 1-5

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

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

Contents v

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

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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