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

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PROPRIETARY NOTICE AND LIABILITY DISCLAIMER  
The information disclosed in this document, including all designs and related materials, is  
the valuable property of NEC Computer Systems Division, Packard Bell NEC, Inc.  
(NECCSD, PBNEC) and/or its licensors. NECCSD and/or its licensors, as appropriate, re-  
serve all patent, copyright and other proprietary rights to this document, including all de-  
sign, manufacturing, reproduction, use, and sales rights thereto, except to the extent said  
rights are expressly granted to others.  
The NECCSD product(s) discussed in this document are warranted in accordance with the  
terms of the Warranty Statement accompanying each product. However, actual  
performance of each such product is dependent upon factors such as system configuration,  
customer data, and operator control. Since implementation by customers of each product  
may vary, the suitability of specific product configurations and applications must be  
determined by the customer and is not warranted by NECCSD.  
To allow for design and specification improvements, the information in this document is  
subject to change at any time, without notice. Reproduction of this document or portions  
thereof without prior written approval of NECCSD is prohibited.  
NEC is a registered trademark of NEC Corporation;  
Versa is a U.S. registered trademark of NEC Technologies, Inc.;  
all are used under license by NEC Computer Systems Division (NECCSD), Packard Bell NEC, Inc.  
All other product, brand, or trade names used in this publication are the trademarks or registered  
trademarks of their respective trademark owners.  
First Printing — March 1997  
Copyright 1997  
NEC Computer Systems Division, Packard Bell NEC, Inc.  
1414 Massachusetts Avenue  
Boxborough, MA 01719  
All Rights Reserved  
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iii  
Contents  
Preface......................................................................................................................... xi  
Abbreviations............................................................................................................... xiii  
Section 1 Introduction  
Feature Highlights........................................................................................................1-2  
System Configuration...................................................................................................1-3  
Quick Tour of the Notebook........................................................................................1-4  
Main Components.................................................................................................1-4  
Color LCD Display Panel...............................................................................1-4  
Power Switch/LCD Cover Switch..................................................................1-4  
Status Panel and Power Indicator...................................................................1-4  
Keyboard .......................................................................................................1-5  
VersaGlide.....................................................................................................1-6  
Memory Slot Compartment............................................................................1-7  
The Right Side of the Notebook............................................................................1-7  
Built-In Disk Drive.........................................................................................1-7  
PC Card Slot Compartment............................................................................1-7  
Hard Disk Drive Compartment.......................................................................1-8  
Front of the Notebook ..........................................................................................1-8  
Battery Compartment.....................................................................................1-8  
Left Side of the Notebook.....................................................................................1-9  
DC-IN Connector Jack...................................................................................1-9  
Hardware Reset Switch..................................................................................1-10  
The Rear of the Notebook.....................................................................................1-10  
External Keyboard and PS/2 Mouse Port .......................................................1-10  
VGA Port ......................................................................................................1-11  
Printer Port....................................................................................................1-12  
Serial Port (COM1)........................................................................................1-12  
Bottom of the Notebook.......................................................................................1-12  
Battery Module Handle and Lock...................................................................1-13  
ROM Memory Compartment Cover...............................................................1-13  
System BIOS Setup Program.......................................................................................1-14  
The Boot Setup Menu..................................................................................................1-14  
System Upgrades .........................................................................................................1-19  
Memory Upgrade Procedure........................................................................................1-19  
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iv  
Contents  
System BIOS Upgrade Procedure ................................................................................1-20  
Section 2 General Specifications  
Product Mix.................................................................................................................2-6  
System Board Specifications........................................................................................2-7  
Transfer Board Specifications ......................................................................................2-8  
Converter Board Specifications....................................................................................2-8  
LED Indicator Board Specifications.............................................................................2-9  
I/O Board Specifications..............................................................................................2-10  
LCD Inverter Board Specifications ..............................................................................2-12  
LED Status Indicators Specifications ...........................................................................2-13  
Diskette Drive Specifications .......................................................................................2-13  
HDD Unit Specifications..............................................................................................2-14  
CD-ROM Specifications ..............................................................................................2-14  
NIMH Battery Pack Specifications...............................................................................2-14  
DC/DC Converter & Battery Charger Specifications....................................................2-15  
Battery Charger Specifications.....................................................................................2-15  
Keyboard Specifications...............................................................................................2-16  
AC/DC Adapter Specifications.....................................................................................2-16  
BIOS Specifications.....................................................................................................2-17  
Micro-Controller Function Description ........................................................................2-18  
Power Management Features (Mode Definition) ..........................................................2-19  
Power Management Features (Mode Transition) ..........................................................2-20  
Hot Key Definition.......................................................................................................2-21  
Environmental Specifications .......................................................................................2-21  
Power Source Specifications........................................................................................2-22  
Vibration Specifications ...............................................................................................2-22  
Shock Specifications....................................................................................................2-22  
Electro-Static Discharge (ESD) Specifications .............................................................2-23  
Section 3 Hardware Functional Overview  
Functional Block Diagram............................................................................................3-2  
System BIOS...............................................................................................................3-2  
System Processor..................................................................................................3-3  
Major Functional Blocks.......................................................................................3-3  
System Logic Controller ..............................................................................................3-4  
Memory Subsystem......................................................................................................3-6  
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Contents  
v
DRAM Memory....................................................................................................3-6  
ROM Subsystem...................................................................................................3-6  
I/O Subsystem .............................................................................................................3-6  
VIDEO Subsystem.......................................................................................................3-7  
Video Chipset Controller ......................................................................................3-7  
External VGA Capability.......................................................................................3-8  
Keyboard Subsystem....................................................................................................3-8  
PCMCIA Controller and Sockets.................................................................................3-9  
Hard Disk Subsystem...................................................................................................3-9  
Diskette Drive Subsystem ............................................................................................3-10  
Pointing Device Subsystem ..........................................................................................3-10  
Power Subsystem.........................................................................................................3-10  
AC Power Adapter ...............................................................................................3-10  
Internal Battery Pack ............................................................................................3-11  
Power Board.........................................................................................................3-11  
LCD Inverter Board Assembly..............................................................................3-11  
Section 4 Field Service Guidelines  
Preventive Maintenance ...............................................................................................4-1  
Cleaning the Notebook’s Exterior .........................................................................4-1  
Cleaning the Notebook’s Interior ..........................................................................4-2  
Protecting the Disk Drives ....................................................................................4-2  
Handling the Computer Battery Packs...................................................................4-2  
Maintaining the LCD Quality ................................................................................4-3  
Required Tools and Replacement Procedures...............................................................4-3  
Parts Removal and Replacement Procedures ................................................................4-4  
Removing/Replacing the Notebook Battery Pack ..................................................4-4  
Removing/Replacing the Hard Disk Drive Module ................................................4-5  
Removing/Replacing the Diskette Drive Module ...................................................4-5  
Removing/Replacing the LCD Status Bar Cover and Hinges .................................4-6  
Removing/Replacing the Keyboard........................................................................4-7  
Removing/Replacing the Heat Plate.......................................................................4-7  
Removing/Replacing the CPU...............................................................................4-7  
Removing/Replacing the Cover-Display LCD Assembly Module...........................4-8  
Removing/Replacing the System Top Cover Assembly and the NEC VersaGlide  
Assembly...........................................................................................................4-8  
Removing/Replacing the LED Board.....................................................................4-9  
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vi  
Contents  
Removing/Replacing the System Board and I/O Board..........................................4-10  
Separating the System Board and I/O Board .........................................................4-11  
Removing/Replacing the Power Board..................................................................4-12  
Illustrated Parts Breakdown.........................................................................................4-13  
Packaging and Documentation ..............................................................................4-16  
Section 5 Troubleshooting and Repair  
Service Information......................................................................................................5-1  
Technical Support........................................................................................................5-1  
Product Information.....................................................................................................5-2  
Ordering Information from FastFacts ....................................................................5-2  
Helpful Starters............................................................................................................5-3  
Power On Self Test (POST).........................................................................................5-4  
POST Messages....................................................................................................5-4  
Informational Messages.........................................................................................5-7  
Run-time Error Messages......................................................................................5-8  
Quick Troubleshooting ................................................................................................5-9  
Appendix A Video Modes  
VGA Standard Modes..................................................................................................A-1  
VGA Extended Modes.................................................................................................A-3  
VGA High Refresh Modes...........................................................................................A-5  
List of Figures  
1-1  
1-2  
1-3  
1-4  
1-5  
1-6  
1-7  
1-8  
1-9  
1-10  
1-11  
1-12  
NEC Versa 2500 Series Notebook ................................................................. 1-1  
System Configuration Diagram....................................................................... 1-3  
Standard Keyboard Layout............................................................................. 1-5  
VersaGlide..................................................................................................... 1-6  
Memory Slot Compartment............................................................................ 1-7  
Inserting a PC Card........................................................................................ 1-8  
Removing the Battery Pack............................................................................ 1-9  
Left Side of the Notebook.............................................................................. 1-9  
Connecting the AC Adapter to the Notebook................................................. 1-10  
The Rear Side of the Notebook...................................................................... 1-10  
Connecting an External Keyboard and Mouse ................................................ 1-11  
Connecting an External Monitor..................................................................... 1-11  
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Contents  
vii  
1-13  
1-14  
1-15  
1-16  
Connecting to the Printer Port........................................................................ 1-12  
Connecting to the Serial Port ......................................................................... 1-12  
Bottom View of the Notebook....................................................................... 1-13  
The Boot Setup Menu.................................................................................... 1-14  
3-1  
Functional Block Diagram.............................................................................. 3-2  
4-1  
4-2  
4-3  
4-4  
4-5  
4-6  
4-7  
Hard Disk Drive Module Assembly ................................................................ 4-5  
Floppy Drive Module Assembly ..................................................................... 4-6  
The LED Board Module Assembly................................................................. 4-10  
The System Board and I/O Board................................................................... 4-11  
The I/O Board Module Assembly................................................................... 4-12  
Power Board Module Assembly ..................................................................... 4-12  
NEC Versa 2500 Series Illustrated Parts Breakdown...................................... 4-15  
List of Tables  
1-1  
1-2  
1-3  
1-4  
1-5  
1-6  
1-7  
1-8  
Model Configurations .................................................................................... 1-1  
Feature Highlights.......................................................................................... 1-2  
Fn Key Combination Summary....................................................................... 1-5  
Boot Main Setup Menu.................................................................................. 1-15  
Boot Setup Peripherals Menu......................................................................... 1-16  
Boot Setup Security Menu............................................................................. 1-17  
Boot Setup Power Savings Menu................................................................... 1-18  
16 MB Memory Configurations...................................................................... 1-19  
2-1  
2-2  
2-3  
2-4  
2-5  
2-6  
2-7  
2-8  
2-9  
2-10  
2-11  
2-12  
NEC Versa 2500 Series Specifications ........................................................... 2-1  
Product Mix................................................................................................... 2-6  
Main Board Specifications.............................................................................. 2-7  
Transfer Board Specifications......................................................................... 2-8  
Converter Board Specifications...................................................................... 2-8  
LED Indicator Board Specifications............................................................... 2-9  
I/O Board Specifications ................................................................................ 2-10  
LCD Inverter Board Specifications................................................................. 2-12  
Status LED Descriptions................................................................................ 2-13  
Diskette Drive Specifications.......................................................................... 2-13  
Hard Disk Drive Specifications....................................................................... 2-14  
CD-ROM Reader Specifications..................................................................... 2-14  
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viii  
Contents  
2-13  
2-14  
2-15  
2-16  
2-17  
2-18  
2-19  
2-20  
2-21  
2-22  
2-23  
2-24  
2-25  
2-26  
2-27  
Battery Specifications..................................................................................... 2-14  
DC/DC Converter & Battery Charger Specifications ...................................... 2-15  
Battery Charger Specifications ....................................................................... 2-15  
Keyboard Specifications................................................................................. 2-16  
AC/DC Adapter Specifications....................................................................... 2-16  
BIOS Specifications....................................................................................... 2-17  
Micro-Controller Specifications...................................................................... 2-18  
Power Management Modes............................................................................ 2-19  
Mode Definitions ........................................................................................... 2-20  
Hot Keys........................................................................................................ 2-21  
Environmental Specifications.......................................................................... 2-21  
Power Specifications...................................................................................... 2-22  
Vibration Specifications ................................................................................. 2-22  
Shock Specifications ...................................................................................... 2-22  
Electro-Static Discharge (ESD) Specifications ............................................... 2-23  
4-1  
4-2  
NEC Versa 2500 Series Field-Replaceable Parts............................................. 4-13  
Packaging and Documentation Part Numbers ................................................. 4-16  
5-1  
5-2  
5-3  
5-4  
5-5  
NEC Service and Information Telephone Numbers......................................... 5-1  
POST Error Messages.................................................................................... 5-4  
BIOS Informational Messages........................................................................ 5-7  
Run-time Error Messages............................................................................... 5-8  
Quick Troubleshooting................................................................................... 5-9  
A-1  
A-2  
A-3  
A-4  
A-5  
A-6  
A-7  
A-8  
A-9  
A-10  
A-11  
A-12  
VGA Standard Modes (Text Mode)............................................................... A-1  
VGA Standard Modes (Graphics Mode) ........................................................ A-2  
VGA Standard Modes (Planar Mode) ............................................................ A-2  
VGA Standard Modes (Packed Pixel Mode) .................................................. A-2  
VGA Extended Modes (Text Mode) .............................................................. A-3  
VGA Extended Modes (4-Bit Linear Mode)................................................... A-3  
VGA Extended Modes (8-Bit Linear Mode)................................................... A-3  
VGA Extended Modes (15-Bit Linear Mode)................................................. A-3  
VGA Extended Modes (16-Bit Linear Mode)-1MB Video Memory Only....... A-4  
VGA Extended Modes (24-Bit Linear Mode)................................................. A-4  
VGA Extended Modes (Planar Mode)............................................................ A-4  
VGA Extended Modes (Packed Pixel Mode).................................................. A-4  
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Contents  
ix  
A-13  
A-14  
A-15  
VGA High Refresh Modes (Packed Pixel Mode)............................................ A-5  
VGA High Refresh Modes (Planar Mode)...................................................... A-5  
VGA High Refresh Modes (Packed Pixel Mode)............................................ A-5  
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(For United States Use Only)  
FEDERAL COMMUNICATIONS COMMISSION  
RADIO FREQUENCY INTERFERENCE STATEMENT  
!
WARNING  
Changes or modifications to this unit not expressly approved by the party responsible for  
compliance could void the user’s authority to operate the equipment.  
NOTE  
This is a Class B Digital Device. This equipment has been tested and found to comply  
with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits  
are designed to provide reasonable protection against harmful interference in a residential  
installation. This equipment generates, uses and can radiate radio frequency energy and, if not  
installed and used in accordance with the instructions, may cause harmful interference to radio  
communications.  
However, there is no guarantee that interference will not occur in a particular installation. If this  
equipment does cause harmful interference to radio or television reception, which can be determined by  
turning the equipment off and on, the user is encouraged to try to correct the interference by one or  
more of the following measures.  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment to an outlet on a circuit different from the one to which the receiver is  
connected.  
To meet FCC standards, shielded cables and power cords are required to connect this device to a  
personal computer or other Class B certified device.  
Canadian Department of Communications Compliance Statement  
This equipment does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio interference  
Regulations of the Canadian Department of Communications.  
Avis de conformité aux normes du ministère des Communications du Canada  
Cet appareil respecte les limites de bruits radioélectriques applicables aux appareils numériques de Classe B prescrites dans le Règlement sur  
le brouillage radioélectrique édicté par le ministère des Communications du Canada.  
European Community Directive Conformance Statement  
This product is in conformity with the protection requirements of EC Council Directive 89/336/EEC on the approximation of laws of the  
Member States relating to electro-magnetic compatibility. This product satisfied the Class B limits of EN 55022.  
NEC Computer Systems Division, Packard Bell NEC, Inc.  
1414 Massachusetts Avenue  
Boxborough, Massachusetts 01719  
1-800-632-4525  
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xiii  
Abbreviations  
A
ampere  
DOS  
DRAM  
DTE  
ECC  
EDS  
disk operating system  
dynamic RAM  
AC  
AT  
alternating current  
advanced technology  
(IBM PC)  
data terminal equipment  
error checking and correction  
error detecting system  
BBS  
BCD  
BCU  
BIOS  
bit  
Bulletin Board System  
binary-coded decimal  
BIOS Customized Utility  
basic input/output system  
binary digit  
EGA  
EMS  
Enhanced Graphics Adapter  
Expanded Memory  
Specification  
EPP  
enhanced parallel port  
bpi  
bits per inch  
EPROM erasable and programmable  
ROM  
bps  
bits per second  
EVGA  
Enhanced Video Graphics  
Array  
BUU  
C
BIOS Upgrade Utility  
centigrade  
F
Fahrenheit  
Cache  
CAM  
CAS  
high-speed buffer storage  
constantly addressable memory  
column address strobe  
FAX  
FCC  
facsimile transmission  
Federal Communications  
Commission  
CD-ROM compact disk-ROM  
FG  
frame ground  
CGA  
CGB  
CH  
Color Graphics Adapter  
Color Graphics Board  
channel  
FM  
frequency modulation  
Function  
Fn  
FRU  
GB  
field-replaceable unit  
gigabyte  
clk  
clock  
cm  
centimeter  
GND  
HDD  
HEX  
HGA  
Hz  
ground  
CMOS  
complementary metal oxide  
semiconductor  
hard disk drive  
hexadecimal  
COM  
CONT  
CPGA  
CPU  
communication  
Hercules Graphics Adapter  
hertz  
contrast  
ceramic pin grid array  
central processing unit  
cathode-ray tube  
IC  
integrated circuit  
identification  
ID  
CRT  
IDE  
IDTR  
intelligent device electronics  
DAC  
DACK  
DC  
digital-to-analog converter  
DMA acknowledge  
direct current  
interrupt descriptor table  
register  
IMR  
in.  
Interrupt Mask register  
inch  
DIP  
dual in-line package  
Divisor Latch Address bit  
direct memory access  
DMA controller  
DLAB  
DMA  
DMAC  
INTA  
IPB  
interrupt acknowledge  
illustrated parts breakdown  
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xiv  
Abbreviations  
IRR  
ISA  
ISR  
I/O  
Interrupt Request register  
PCB  
PFP  
printed circuit board  
plastic flat package  
parallel input/output  
picture element  
Industry Standard Architecture  
In Service register  
input/output  
PIO  
pixel  
PJQFP  
PLCC  
PLL  
p-p  
IPC  
ips  
integrated peripheral controller  
inches per second  
interrupt request  
kilo (1024)  
plastic J-lead quad flat pack  
plastic lead chip carrier  
phase lock loop  
IRQ  
K
peak-to-peak  
k
kilo (1000)  
PPI  
programmable peripheral  
interface  
KB  
kilobyte  
PROM  
QFP  
programmable ROM  
quad flat pack  
kg  
kilogram  
kHz  
kV  
kilohertz  
RAM  
random-access memory  
kilovolt  
RAMDAC RAM digital-to-analog  
lb  
pound  
RAS  
RGB  
RGBI  
ROM  
rpm  
R
row address strobe  
red green blue  
red green blue intensity  
read-only memory  
revolutions per minute  
read  
LDTR  
LED  
LSB  
LSI  
M
local descriptor table register  
light-emitting diode  
least-significant bit  
large-scale integration  
mega  
mA  
max  
MB  
MDA  
MFM  
Mhz  
mm  
ms  
milliamps  
RTC  
R/W  
S
real-time clock  
read/write  
maximum  
megabyte  
slave  
Monochrome Display Adapter  
modified frequency modulation  
megahertz  
SCSI  
Small Computer System  
Interface  
SDLC  
Synchronous Data Link  
Control  
millimeter  
millisecond  
SG  
signal ground  
MSB  
NASC  
most-significant bit  
SOIC  
SQFP  
SVGA  
SW  
small outline integrated circuit  
silver quad flat package  
Super Video Graphics Array  
switch  
National Authorized Service  
Center  
NC  
not connected  
NDP  
NMI  
ns  
numeric data processor  
Non-maskable Interrupt  
nanosecond  
TCP  
TQFP  
TSC  
TTL  
tpi  
Thin chip package  
Thin-quad flat package  
Technical Support Center  
transistor/transistor logic  
tracks per inch  
NSRC  
National Service Response  
Center  
PAL  
PC  
programmable array logic  
personal computer  
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Abbreviations  
xv  
UART  
universal asynchronous  
receiver/transmitter  
V
volt  
Vdc  
VESA  
volts, direct current  
video electronics standards  
association  
VFO  
VGA  
VLSI  
VRAM  
W
variable frequency oscillator  
Video Graphics Array  
very large-scale integration  
virtual RAM  
watt  
µf  
microfarad  
µPD  
µs  
microprocessor  
microsecond  
ohm  
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Section 1  
Introduction  
This section focuses on providing outline features and operations of the NEC Versa 2500  
Series Notebook Computer, including the BIOS Setup program. (Refer to the User’s Guide  
for more information on operating the notebook.) The NEC Versa 2500 Series of note-  
books are lightweight, compact, and fully IBM compatible.  
The NEC Versa 2500 Series Notebook comes in the following model configuration.  
Table 1-1 Model Configuration  
Configuration  
NEC Versa 2500  
Intel P54CSLM-133  
16 MB  
CPU  
On-Board DRAM  
Video Memory  
Hard Disk Drive  
Color LCD  
1 MB  
1.4 GB  
12.1” DSTN LCD  
Type A (3500 mA  
NiMH)  
Battery Pack  
Figure 1-1 NEC Versa 2500 Series Notebook  
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1-2  
Introduction  
FEATURE HIGHLIGHTS  
The NEC Versa 2500 Series notebook includes a variety of innovative features designed to  
meet the most demanding computing requirements  
Table 1-2 Feature Highlights  
Features  
CPU  
Description  
Intel P54CSLM-133 MHz processor with internal 16 KB cache  
memory and math coprocessor  
Memory  
On-board 16 MB RAM, can be upgraded to 48 MB  
256 KB, L2 cache  
Cache RAM  
Display  
12.1” DSTN VGA Color LCD at 800 x 600 pixels resolution with 256K  
colors  
VGA  
32-bit Video PCI bus VGA controller/ 1 MB RAM Video Memory /  
Supports up to 1024 x 768 pixels resolution for external CRT monitor  
with 256 colors  
HDD  
Removable 2.5-inch IDE high capacity hard drive (12.7mm height)  
Built-in 3.5-inch 1.44 MB floppy disk drive  
FDD  
Keyboard  
Built-in 87/88-key keyboard with 12 programmable function keys,  
embedded numeric keypad and special function control keys,  
dedicated screen control keys, and inverted “T” cursor keys / IBM  
enhanced 101/102-key compatible keyboard  
Pointing Device  
PC Card Slots  
VersaGlide  
Two slots that support two Type II PC cards at the same time, or one  
Type III, and one Type II PC cards at the same time  
I/O Port  
1 x Serial Port (w/ FIFO) / 1 x Printer Port (ECP/EPP) / 1 x VGA Port  
/ 1 x PS/2 keyboard & mouse port  
Power System  
Auto-switching AC Adapter (90V - 264V) / Rechargeable NiMH  
Battery pack / Advanced power management capabilities  
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Introduction  
1-3  
SYSTEM CONFIGURATION  
The following diagram shows the NEC Versa 2500 Series system configuration.  
INTEL  
P54CSLM(TCP)  
CPU  
Cache RAM  
L2: 256KB  
write back  
Color LCD  
(800x600)  
DSTN  
VL Bus  
Controller  
(VGA)  
External  
VGA  
Monitor  
BIOS  
Flash ROM  
8 / 16MB RAM  
On-Board  
Upgradable to  
48MB  
NEC  
VersaGlide  
PS/2 Keyboard  
and  
Bank 1 (Slot 1)  
4 / 8 / 16MB  
DIMM  
PS/2 Mouse  
Keyboard  
RS-232C  
Peripheral  
Serial Interface  
(RS-232C)  
Printer  
Parallel  
Interface  
Built-in  
HDD  
PCMCIA Card  
Slot x 2  
PCMCIA Card  
Battery Pack  
3.5" FDD  
Figure 1-2 System Configuration Diagram  
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1-4  
Introduction  
QUICK TOUR OF THE NOTEBOOK  
Take a moment to become familiar with the locations and functions of all controls. It is rec-  
ommended that you first go through the notebook’s user guide for more information on  
how to operate all of the features.  
Main Components  
This section describes the main features of the NEC Versa 2500 Series computer.  
Color LCD Display Panel  
The notebook has a built-in 12.1 inch passive matrix dual scan DSTN color liquid crystal  
display (LCD) which you can adjust and tilt to your desired viewing position. The LCD  
provides 800x600 pixel resolution with a maximum of 256 colors, and supports simultane-  
ous display with an external VGA monitor.  
The LCD screen also uses Cold Cathode Fluorescent Tube (CCFT) backlighting which con-  
sumes most of the power from the notebook. To save battery power, the system has an ad-  
vanced power management feature that powers down the LCD when it has not been used  
for a predetermined amount of time. You can adjust the brightness and contrast level of the  
LCD by pressing the “Fn “ key (lower left corner) and the desired brightness or contrast  
keys (lower right corner) at the same time.  
Power Switch/LCD Cover Switch  
The power switch button, when pressed, turns on the notebook’s power. Press it again to  
turn computer power off. Whenever the notebook is in “Save-to-file” suspend mode, the  
power switch button serves as a manual resume switch, allowing you to continue your ap-  
plication work where you left off.  
NOTE:  
Always wait for a few seconds between  
turning off and turning on the power.  
On the top of the unit underneath the right hinge is the LCD cover switch button. This but-  
ton automatically depresses and releases when you lower or raise the LCD display panel.  
Depending on your power management settings, this button will either switch the notebook  
to the Suspend mode or will shut off the LCD when you close the cover.  
Status Panel and Power Indicator  
Directly below the LCD display, in the center near the right hinge, is the Suspend Mode  
LED displays. These LEDs provide an easy way to determine the current power mode of  
the unit. Below these two LEDs is a row of seven more. These LEDs light to indicate  
whether a device is being accessed, whether an operation is being done, or if a certain mode  
is or has been activated.  
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Introduction  
1-5  
Keyboard  
The notebook has a built-in 87/88-key keyboard that provides complete emulation of a full-  
sized IBM AT-enhanced keyboard with function keys and screen/cursor control keys.  
Figure 1-3 Standard Keyboard Layout  
The notebook keyboard includes an embedded numeric keypad, and some special function  
keys that are activated by pressing the Fn key together with another key. These special  
function keys (more popularly known as “hot keys”) allow you to control and adjust some  
of the notebook’s functions like; display controls, speaker volume, and power management  
features. The embedded numeric keypad is activated by pressing the Num Lock key. Once  
the Num Lock key is pressed the upper blue symbols become active.  
NOTE: Activating the Num Lock key in turn  
disables the alphanumeric keys where the embed-  
ded keys are located. Press the Num Lock key  
again to disable the embedded keys and resume  
normal keyboard operation.  
Table 1-3 Fn Key Combination Summary  
Key Combination  
Fn key + Esc key  
Fn key + F8 key  
Fn key + F10 key  
Function  
This key combination puts the system in Suspend mode.  
This key combination mutes the PC speaker volume.  
This key combination toggles between video display output to the  
LCD display, to an external CRT monitor, or to a simultaneous dis-  
play of LCD and CRT.  
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1-6  
Introduction  
Table 1-3 Fn Key Combination Summary (cont’d)  
Function  
Key Combination  
This key combination toggles the LCD display backlighting (CCFT)  
on and off.  
Fn key + F11 key  
This key combination increases the contrast level.  
This key combination decrease the contrast level.  
Fn key + right key  
Fn key + left key  
Fn key + Up key  
This key combination increase the brightness incrementally for the  
LCD.  
This key combination decreases the brightness incrementally for  
the LCD.  
Fn key + Down key  
Fn key + PgUp key  
Fn key + PgDn key  
This key combination increases the speaker volume level incre-  
mentally.  
This key combination decreases the speaker volume level incre-  
mentally.  
The notebook’s keyboard also features an embedded editing keypad, which offers an op-  
tional method for editing and moving within documents. The embedded editing keys are  
color coded in blue and embedded on the front side of the embedded numeric keypads. To  
use these editing keys, first press the Num Lock key and then combine the Shift key + the  
desired function key to enable these editing keys. When the embedded editing keys are op-  
erational, the Num Lock LED will be activated. To return to normal keyboard operation,  
press the Num Lock key again. When the Num Lock LED glows the embedded numeric  
key pads are activated.  
VersaGlide  
In front of the keyboard panel, in the center of the palm rest typing surface, is the Versa-  
Glide pointing device. The buttons below the glide pad are configured (by default) as the  
left and right button respectively. While the button to the right is configured as the right  
button on the mouse. Moving the pointer on the screen is done by moving your finger over  
the surface and directing the pointer where you want it to go.  
Figure 1-4 VersaGlide  
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Introduction  
1-7  
Memory Slot Compartment  
The memory compartment is located just under the keyboard. Inside the compartment are  
two extra memory module sockets which can accommodate any standard JEDEC 8 MB or  
16 MB DIMM modules.  
Figure 1-5 Memory Slot Compartment  
The Right Side of the Notebook  
This section describes the features on the right side of the NEC Versa 2500 computer.  
Built-in Disk Drive  
The disk drive, which supports 3.5-inch 1.44 MB high density (HD) diskettes or 720 KB  
double-sided (DS) diskettes is on the right-front side of the notebook. Insert the diskette  
with the metal shutter towards the drive and the diskette label facing up. To remove the  
diskette, press the eject button found on the upper right of the floppy disk drive.  
PC Card Slot Compartment  
The compartment houses two card slots that support two Type II devices, or one Type III  
device. Open the compartment door to view the PC card slots. Insert Type III cards into the  
lower slot. Insert the card with the pin sockets facing towards the drive and the label facing  
up. To remove the PC card, push on the eject button to release the pin connections and  
slowly pull out the card.  
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1-8  
Introduction  
The NEC Versa 2500 Series also comes with DOS/Windows PC card drivers for supporting  
various PC cards like modem cards, network cards, and other I/O and memory cards. The  
LED Status Bar, likewise, provides lights to indicate when the computer is accessing the in-  
serted PC cards. The upper PC card slot is referred to “Slot 0” while the bottom slot is re-  
ferred to as “Slot 1”. Slot 0 always takes precedence over Slot 1 in drive designations.  
Figure 1-6 Inserting a PC Card  
Hard Disk Drive Compartment  
Just beside the diskette drive, and below the PC slots, is the notebook’s internal hard drive.  
The NEC Versa 2500 Series provides an industry standard 2.5-inch, 1 GB IDE hard disk  
drive. The system BIOS also includes Auto IDE detection and LBA mode for easy installa-  
tion as well as later upgrades for higher capacity disk drives.  
Front of the Notebook  
This section describes the features on the front side of the NEC Versa 2500 Series com-  
puter.  
Battery Compartment  
The battery compartment is in the left front corner of the notebook. It houses the recharge-  
able NiMH battery pack. The battery pack begins charging whenever you connect the AC  
adapter to the notebook. It is very important to always have the battery installed on the  
notebook and to have it always charged. Leaving the battery pack out of the unit for a long  
period of time completely drains the battery cells.  
To remove the battery pack from the compartment unit, push the battery compartment re-  
lease lock and slowly pull out the battery pack.  
NOTE: The NEC Versa 2500 Series models  
uses Type A battery packs with 3500mA.  
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Introduction  
1-9  
Figure 1-7 Removing the Battery Pack  
Left Side of the Notebook  
The following details the left side of the NEC Versa 2500 Series computer.  
DC-IN  
Connector  
Power Switch  
Reset Switch  
Figure 1-8 Left Side of the Notebook  
DC-IN Connector Jack  
The NEC Versa 2500 series provides a universal auto-switching AC adapter which con-  
nects the AC power cord into the power outlet. It is important to have the AC adapter con-  
nected to the notebook to recharge the battery and keep the notebook working  
continuously.  
NOTE:  
Use only the AC adapter that comes  
with the NEC Versa 2500 Series notebook.  
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1-10  
Introduction  
Figure 1-9 Connecting the AC Adapter to the Notebook  
Hardware Reset Switch  
To the right of the AC adapter connector jack, you will notice a small hole which allows an  
easy alternative to resetting the notebook’s hardware.  
The Rear of the Notebook  
The following details the rear side of the NEC Versa 2500 Series computer.  
IR Port  
Ext. K/B and  
Sound Jacks  
PS/2 Mouse  
Port  
Serial Port  
Expansion Port  
VGA Port  
Parallel Port  
Figure 1-10 The Rear Side of the Notebook  
External Keyboard and PS/2 Mouse Port  
The external keyboard and PS/2 mouse port allows you to connect an external full-sized  
IBM AT-enhanced keyboard. When an external keyboard is connected, both the built-in  
keyboard of the notebook and the external keyboard can be used simultaneously.  
The NEC Versa 2500 Series also provides a Y-connector adapter allowing simultaneous  
use of an external AT-enhanced keyboard and a PS/2 mouse. When using DOS or Windows  
for Workgroups, if a external serial mouse is installed the VersaGlide is not supported.  
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Introduction  
1-11  
Figure 1-11 Connecting an External Keyboard and PS/2 Mouse  
VGA Port  
The 15-pin female VGA connector allows you to connect an external VGA monitor that  
supports up to 1024x768 pixels resolution. When displaying on an external VGA monitor  
alone, the VGA port supports resolutions up to 1024x768 at 256 colors.  
The NEC Versa 2500 Series provides a VGA VESA driver diskette for installing different  
display resolution drivers for Windows Setup. You can also toggle the display between the  
LCD and the external monitor by pressing the Fn key + F10 key combination.  
NOTE: Even when set to 800x600 or  
1024x768 resolution, the external monitor only  
shows 800x600 resolution if the computer is  
running at Simultaneous display. Toggle the dis-  
play to the external monitor only in order to dis-  
play higher resolution.  
Refer also to Appendix A for a list of supported  
video modes.  
Figure 1-12 Connecting an External Monitor  
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1-12  
Introduction  
Printer Port  
The 25-pin printer port provides a parallel interface to connect a parallel printer or pocket  
network adapter. Many operating systems and software applications refer to this port as  
LPT1. You can run the BIOS Setup program to change the configuration of the parallel  
port to Standard or Bi-directional.  
Figure 1-13 Connecting to the Printer Port  
Serial Port (COM1)  
The 9-pin serial port provides a serial interface for a RS-232C device such as external serial  
modem. This port is commonly referred to as COM1.  
Figure 1-14 Connecting to the Serial Port  
NOTE: First power off the system before con-  
necting an external serial device. After turning on  
the power again, run the BIOS Setup program if  
needed.  
Bottom of the Notebook  
The bottom of the New Versa 2500 computer contains the release latches shown in the fol-  
lowing figure. Pressing the release latch lets you remove the option installed in the corre-  
sponding bay.  
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Introduction  
1-13  
Figure 1-15 Bottom View of the Notebook  
The following describes the bottom of the NEC Versa 2500 Series computer.  
Battery Module Handle and Lock  
To release the battery module from its compartment, push the battery compartment latch as  
indicated by the arrow marked on it. While doing this, hold the handle of the battery module  
and slowly pull it out from its compartment.  
ROM Memory Compartment Cover  
The ROM memory compartment cover is secured by tabs. Lift the cover with your finger-  
nail to open this cover (the ROM chip is inside). It is not necessary to remove this cover  
while performing normal service operations.  
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1-14  
Introduction  
SYSTEM BIOS SETUP PROGRAM  
This section provides the outline features and operation of the Phoenix BIOS Setup pro-  
gram used in the NEC Versa 2500 Series. The BIOS (Basic Input-Output System) Setup  
program allows you to change the system configuration settings such as the current date  
and time, the disk drive and ports settings, and the power management as well.  
As POST (Power-On Self Test) executes during boot up process, the screen will display the  
following message:  
Press F2 to Enter SETUP  
Press the F2 key to run the BIOS Setup program. The BIOS Setup program is organized  
into two pages of menus. Change settings using the PgDn and PgUp keys. To move from  
-
one option to another, you use the up and down arrow keys while using the spacebar and  
keys to change the settings.  
To exit the BIOS Setup program, simply press the Esc key and select from the listed  
choices window whether you want to load the default values for all fields; save your  
changes and exit; or exit without saving any changes.  
THE BOOT SETUP MENU  
The boot setup menu allows you to change the following configurations:  
Figure 1-16 The Bootup Setting Menu  
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Introduction  
1-15  
Table 1-4 Boot Main Setup Menu  
Function  
Item  
System Time  
This option allows you to change the system time, using the  
format hour : minute : second. You can change the system  
time here or from your operating system’s command prompt.  
System Date  
Diskette A  
Hard Disk  
This option allows you to change the system date, using the  
format month / day / year. You can change the system date  
here or from your operating system’s command prompt.  
This option allows you to specify the type of diskette drive  
mounted inside the notebook. The default setting for this  
option is 3.5”, 1.44 MB disk drive.  
This option allows you to specify the type of hard drive  
mounted inside the notebook.  
Select the Auto option to instruct the BIOS to automatically  
detect the relevant parameters of the hard drive.  
Some hard drives, however, do not respond correctly to the  
values detected. In such cases, you must search and select,  
from the list, the make and model of the drive being used.  
Base Memory  
This field reports the amount of base (or conventional)  
memory found by the BIOS during its POST. The value  
should not exceed or go below 640 KB.  
Extended Memory  
This field reports the amount of extended memory found by  
the BIOS during POST. The value displayed is the amount of  
the memory address map. Because all models in the NEC  
Versa 2500 Series have a minimum of 16 MB of memory as  
the standard configuration, this value should not be less than  
7168 KB.  
Boot Options  
This option allows you to configure the computer to which  
drive it first looks for the operating system.  
Select A:, CD-ROM (if installed) then C: if you want to boot  
from a diskette. If there is no diskette found in the floppy  
drive, the computer then tries to load the operating system  
from the CD-ROM. If there is no CD-ROM then the computer  
tries to load the operating system from the hard drive.  
Select C: then A: if you want to boot from a hard drive. If  
there is no operating system found in the hard drive the  
computer tries to load the operating system from a floppy  
drive.  
Select C: only if the hard drive already holds an operating  
system and all necessary startup file configurations.  
SETUP prompt  
Setting this to enabled display “Press <F2> to Enter SETUP”  
on boot; Setting to disable suppresses the message, but  
pressing <F2> will still enter SETUP.  
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1-16  
Introduction  
Table 1-4 Boot Main Setup Menu (cont’d)  
Function  
Item  
POST Errors  
This options allow the system to pause and display the error  
message at boot attempt.  
Keyboard Features  
Num Lock  
Selects keyboard options.  
This option toggles the Num Lock key on or off.  
Keyboard Repeat  
Rate  
This option allows you to select the auto-repeat key speed.  
Possible values include 2, 6, 10, 13.3, 18.5, 21.8, 26.7, or 30  
seconds.  
Keyboard Auto-  
Repeat Delay  
This option allows you to select the delay before repeat.  
Possible values include 1/4, 1/2, 3/4 and 1 second.  
Table 1-5 Boot Setup Peripherals Menu  
Function  
Item  
This option allows you to configure the notebook’s serial port  
as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4), (2E8-IRQ3),  
or disabled. The default setting is (3F8-IRQ4).  
Serial Port  
This option allows you to configure the notebook’s infrared  
serial port as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4),  
(2E8-IRQ3), or disabled. The default is (2F8-IRQ3).  
Infrared Serial Port  
Parallel Port  
This option allows you to configure the notebook’s parallel  
port as either (378-IRQ5), (3BC-IRQ7), (278-IRQ5), (378-  
IRQ7), or none. The default is (378-IRQ7).  
This option allows you to configure the notebook’s parallel  
mode as either Unidirectional, Bi-directional, Enhanced, or  
ECP. The default is ECP.  
Parallel Mode  
This option disables the floppy disk controller.  
Diskette Controller  
IDE Adapter  
This option disables the IDE adapter.  
This option disables the on-board audio.  
On Board Audio  
I/O Channel  
Changes the default value of 220h to 230h, 240h or 250h.  
Changes the default value of IRQ5 to IRQ7, IRQ9 or IRQ10.  
Changes the default value of CH0 to CH1 or CH3.  
Changes the default value of 300h to 310h, 320h or 330h.  
This option allows you to enable or disable the game port.  
Changes the default value of disabled to PAL or NTSC.  
IRQ Channel  
DMA Channel  
MPU I/O  
Game Port  
Display to TV  
Plug & Play O/S  
Select “Yes” if a Plug and Play capable operating system is  
installed.  
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Introduction  
1-17  
Table 1-6 Boot Setup Security Menu  
Function  
Item  
This option allows you to limit access to the computer through  
the use of a password. If you select this option, a pop-up win-  
dow appears asking you to set or change the password. A  
password can be up to seven characters in length, and is  
cleared by eliminating the password with the F1 key.  
Password  
Note: If you forget the password of the computer, the  
only way to access the system again is to discharge the  
CMOS battery. See note below.  
Set Password  
Press Enter to enter the Password.  
This option allows you to configure the Password to be en-  
abled at the operating system level.  
Password on Boot  
This option allows you to configure the Password to be en-  
abled when resuming from the Suspend mode.  
Password on Re-  
sume  
The Caps Lock and Scroll Lock LED’s flash in sequence for  
30 seconds, indicating that the password is required to re-  
sume. The LED’s start flashing again as soon as a key is hit  
until a password is entered.  
NOTE: You can discharge the CMOS battery  
by simply unplugging the RTC CMOS battery  
from the connector CN11 of the motherboard.  
You must wait for 10 minutes before plugging in  
the battery again.  
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1-18  
Introduction  
Table 1-7 Boot Setup Power Savings Menu  
Function  
Item  
This option allows you to enable or disable power manage-  
ment.  
Power Saving  
Disabled  
, all other power management settings are ig-  
Select  
nored and disabled as well.  
Disabled ON AC  
Select  
, the power management is disabled  
only when the computer is powered by the AC adapter, but  
will enable the power management while on battery.  
Enabled  
, the power management is enabled all the  
Select  
time.  
This option allows you to specify the length of time the system  
will be in the Idle Mode before entering the Standby mode.  
Standby Time-out  
Standby Mode places the Serial, infrared and parallel ports,  
floppy drive, and hard drive into a power saving mode.  
Disabled, 1, 2, 4, 8, 16 minutes  
or  
Possible values include  
.
This option allows you to specify the length of time the system  
will be in the Standby mode before entering the Suspend  
mode.  
Auto Suspend  
Time-out  
Disabled, 1, 2, 4, 8, 16 minutes  
or  
Possible values include  
.
This option allows you to enable Suspend mode.  
Suspend Mode  
Save to File  
Select  
, the computer saves data to the hard drive.  
It is important to have a hidden file on the hard drive when  
enabling this; otherwise an error message appears on the  
display screen when the system restarts.  
SUSPEND  
, the computer saves data to RAM  
Select  
The computer switches to the Suspend mode after the preset  
time of inactivity. During this Suspend mode the computer  
becomes inactive, all devices are in Suspend mode, and the  
CPU is powered off.  
This option allows you to select a specific time-out value after  
which power to the hard drive is shut down. Possible values  
Hard Disk Time-out  
Disabled, 1, 2, 4, 8, 16 minutes  
include  
or  
.
When not disabled, the hard drive shuts off after the preset  
time of inactivity. The hard drive will activate again when the  
system tries to access it; this may cause a slight delay in the  
computer’s operation as it waits for the hard drive to power up  
again.  
Disable  
Set this option to  
be spinning.  
if you want the hard drive to always  
This option allows you to specify a length of time the key-  
board and mouse is inactive before the screen is turned off.  
Video Time-out  
Disabled, 1, 2, 4 ,8, 16 minutes  
or  
Possible values include  
.
Note: If you use “screen saver” software, the Video Monitor  
Disabled  
should be set to  
.
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Introduction  
1-19  
Table 1-7 Boot Setup Power Savings Menu (cont’d)  
Function  
Item  
This option allows you to effectively program the type of event  
which occurs when the display panel is closed.  
Cover Switch Con-  
trol  
SUSPEND  
, the computer enters the SUSPEND Mode  
Select  
when the LCD Panel is closed.  
Backlight Off  
Select  
, the system powers down the LCD when  
the LCD Panel is closed.  
This option allows you to resume the system if an incoming  
call is received from the serial port modem.  
Serial Port Ring Re-  
sume  
Off  
Select  
, the computer does not resume.  
Select On, the computer resumes.  
This feature does not apply to PC card port modems.  
SYSTEM UPGRADES  
The NEC Versa notebook is easily upgradable to a higher capacity hard drive. In addition,  
you can add an optional second memory modules to increase the system memory to as  
much as 48 MB. This section provides the settings needed as well as illustrations for up-  
grading the system.  
MEMORY UPGRADE PROCEDURE  
The NEC Versa notebook allows you to install and expand the on-board 16 MB system  
memory via the memory compartment found under the keyboard. Inside the compartment is  
an extra memory module socket which can accommodate any standard JEDEC 8 MB and  
16 MB DIMM modules.  
For NEC Versa 2500 Series notebooks, the following memory configurations are applica-  
ble:  
Table 1-8 16 MB Memory Configurations  
On-Board Memory  
Extra Socket  
Total Memory  
16 MB  
16 MB  
16 MB  
16 MB  
empty  
8 MB  
16 MB  
24 MB  
32 MB  
48 MB  
16 MB  
32 MB  
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1-20  
Introduction  
To upgrade the memory in the notebook, follow these steps.  
1. Power off the computer and remove the AC adapter and battery pack.  
2. Remove the hinge covers, status bar cover, and the keyboard from the top of the  
unit and locate the memory expansion sockets.  
3. Remove the extra DIMM module from its anti-static wrapping.  
4. Hold the memory module with its golden teeth connector pointed towards the  
memory socket.  
Note: The top socket is connector 0 and  
should be used when installing only one module.  
Incline the module at 60 degrees and gently attached it to the memory socket by  
pushing it forward.  
5. Slowly push the module downwards until the locking tabs snap into the retaining  
notches or holes at each corner of the module.  
The bottom socket sits a little in front of the top socket for easier access. How-  
ever, installation for both sockets is the same.  
6. Replace the keyboard, status bar cover, and hinge covers.  
7. Reconnect the AC adapter and insert the battery pack into the computer.  
8. Power on the notebook and notice the BIOS error message informing you that the  
memory size stored in CMOS does not match the installed memory size. Press F2  
to run the SETUP program and save the CMOS settings anew. The computer  
automatically adjusts the memory size.  
NOTE: If the notebook has been configured for  
save-to-disk, it may be necessary to run PHDisk  
to re-partition the drive. The save-to-disk parti-  
tion must be of a size sufficient to store the con-  
tent of the whole memory size.  
SYSTEM BIOS UPGRADE PROCEDURE  
The NEC Versa 2500 Series supports the EPROM Flash BIOS that allows you to easily  
update the system BIOS using the Flash Programming utility program called  
PHLASH.COM & PLATFORM.BIN”. Update the system BIOS whenever you are upgrad-  
ing the LCD Panel or adding modifications to the computer’s hardware function. To up-  
grade the System BIOS:  
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Introduction  
1-21  
1. Copy the PHLASH.COM & PLATFORM.BIN BIOS utility program and the BIOS  
ROM file to the hard disk subdirectory. You can also choose to run the program  
from the diskette.  
2. Disable EMM386 or other memory manager programs before restarting the com-  
puter. When booting DOS, press F5 to bypass the CONFIG.SYS and  
AUTOEXEC.BAT. You may also choose to boot from Drive A: with a clean DOS  
diskette.  
3. At the DOS prompt, type “PHLASH <BIOSfilename.ROM>to activate Flash  
BIOS programming utility. The computer then prompts you again before starting  
to update the system BIOS. After programming is complete, the system prompts  
you to reboot the computer to activate the new system BIOS.  
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Section 2  
General Specifications  
The following table lists NEC Versa 2500 Series system specifications.  
Table 2-1 NEC Versa 2500 Series Specifications  
ITEM  
SPECIFICATION  
CPU  
Pentium P54CSLM-133 MHz  
TCP Package  
System RAM  
16 MB On-board  
Upgradeable to 48 MB  
Memory Modules: 8 MB/16 MB/32 MB  
256 KB, L2Cache  
RAM Module Slot  
Two Slots  
2M (256K x 8) Flash BIOS:  
Includes System and VGA  
Shadow BIOS Capability  
Operation Modes:  
System Management  
Power Management  
Full On Mode  
Doze Mode  
Standby Mode  
5V Suspend Mode  
0-volt Suspend Mode  
Peripheral Automatic Power Down  
Cover Switch Support  
Removable HDD Module  
2.5-inch format / 12.7mm high  
Enhanced IDE Interface  
Support IDE PIO mode up to MODE 4  
Support IDE MASTER MODE  
1.4 GB  
Hard Disk Drive  
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2-2  
General Specifications  
Table 2-1 NEC Versa 2500 Series Specifications (cont’d)  
SPECIFICATION  
ITEM  
CD-ROM Reader  
Diskette Drive  
Removable CD-ROM Reader  
8x speed  
Removable Diskette Drive  
720KB/1.44 MB Mode Support (Overseas version)  
12.1” DSTN Color LCD Module:  
800 x 600 in 256 colors  
Display  
External CRT Capability:  
640 x 480 in 64K colors  
800 x 600 in 64K colors  
1024 x 768 in 256 colors  
LCD / CRT Display Simultaneously  
32-bit PCI Bus  
LCD / CRT Auto-Sense  
32-bit Graphics Engine  
Video RAM  
1 MB as Standard  
5V EDO 60NS DRAM 40-Pin SOJ  
Two Type II slots or one Type III slot  
PCMCIA Socket compatible with CARD BUS standard  
Nec VersaGlide  
PCMCIA Slots  
Pointing Device  
Keyboard  
PS/2 Interface  
Keyboard Layout:  
US Layout - 87 Keys  
European Layout - 88 Keys  
Support Extra Windows 95 HotKeys  
Inverted T Compatible Direction Key  
Overlapped/Embedded Function and Numeric Keypad  
Internal and External Keyboard Simultaneous Function  
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General Specifications  
2-3  
Table 2-1 NEC Versa 2500 Series Specifications (cont’d)  
SPECIFICATION  
ITEM  
HotKey  
Operation  
Fn + F8 = PC Beep Mute  
Fn + Esc = Suspend Control  
Fn + <Right Arrow> = Contrast Up  
Fn + <Left Arrow> = Contrast Down  
Fn + <Up> = Brightness Up  
Fn + <Down> = Brightness Down  
Fn + <PgDn> = Decrease Speaker Volume  
Fn + <PgUp> = Increase Speaker Volume  
Fn + F10 = CRT/LCD/Simul.  
Fn + F11 = Backlight On/Off  
25-pin Parallel Port  
I/O Port  
9-pin Serial Port  
15-pin VGA Monitor Port  
External Keyboard or PS/2 Mouse Port  
NEC Y-Cable Support  
DC-IN Jack  
IR Port  
Port Replicator  
Support Game port  
TV out  
External Keyboard  
External PS/2 Mouse  
Serial Port (COM1)  
Printer Port (LPT1)  
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2-4  
General Specifications  
Table 2-1 NEC Versa 2500 Series Specifications (cont’d)  
SPECIFICATION  
ITEM  
Audio  
Support external Stereo Headphone Jack  
Support external Stereo Line-In Jack  
Support external MIC. Jack  
Two Built-in speakers  
Built in microphone  
Status Indicator  
LED Display  
External LED  
Power On & Battery Low (Blinking)  
Internal LED  
Battery Charge  
PCMCIA A/B Slot - Read / Write  
HDD / FDD / CD-ROM - Read / Write  
PMU - Enable  
Num Lock - Enable  
Caps Lock - Enable  
Scroll Lock - Enable  
Power Supply  
AC Adapter  
AC 100V to 240V, 47/63Hz, 36W (Max)  
Constant Power Output  
Dimensions: 120 (L) x 60 (W) x 36 (H) mm  
Battery Input  
Battery A: 10 long A-size 3500mA/hr Ni-MH Battery Cells, 12V  
(Total - 42W)  
Battery Fast Charge (Single Battery Pack)  
Machine On: 6 hours maximum  
Machine Off: 3 hours maximum  
Heat Pipe  
Heat Dissipation  
Dimension  
297mm (L) x 240mm (W) x 50.8mm (H)  
External Battery Charger  
Port Replicator  
Optional Items  
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General Specifications  
2-5  
Table 2-1 NEC Versa 2500 Series Specifications (cont’d)  
SPECIFICATION  
ITEM  
Key Components  
12.1” Color DSTN SVGA LCD: EDMGR68KBF (Panasonic)  
CD-ROM:  
CDR-38E-900  
Hard Disk Drive:  
1.4 GB MK1401MAV (Toshiba)  
Diskette Drive:  
NEC FD1238H  
Keyboard:  
87/88 Key Full Size (Windows 95)  
Controller: Mitsubishi M38813M4  
VersaGlide:  
TM1002S-D Synaptics, or  
KGDDBA-911A Alps  
Battery:  
Panasonic NiMH 1.2V, LA, HHR350A  
Sanyo NiMH 1.2V, LA, HR 4 / 3  
Audio Amplifier: ROHM BA7786FP  
Micro Controller: Micro Chip PIC16C62  
Clock:  
Generator: ICS AV9154-43  
Buffer: NS CGS74CT2524 & CGS74CT2525  
Core Logic:  
UMC 8891BF-N  
UMC 8892BF-N  
UMC 8886BF-N  
VGA Chip: C&T 65548  
Super I/O: NS PC87336VLJ  
PCMCIA  
Controller: Omega 82C094  
Decoder: Omega OM82C28  
Power Switch: Micreel MIC2563-1  
BIOS: Phoenix  
IR Chip: TemicTFDS3000  
Audio Chip: ESS 1788  
Regulor: NS LP2952  
RS232 Driver: MAXIM MAX213  
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2-6  
General Specifications  
Table 2-1 NEC Versa 2500 Series Specifications (cont’d)  
ITEM  
SPECIFICATION  
Flash ROM: AMD AM29F002T  
PWM Controller: MAXIM MAX797  
MOSFET: NS 9410 & 9953  
AC Adapter  
PRODUCT MIX  
The following table lists the NEC Versa 2500 Series product mix.  
Table 2-2 Product Mix  
Versa 2500)  
CPU  
Intel®Pentium/133 MHz,  
P54CSLM(TCP)  
On-Board DRAM  
16 MB  
256KB, L2 Cache  
1 MB  
Video RAM  
HDD  
1.4 GB  
LCD  
12.1” DSTN LCD  
Removable  
8x  
FDD  
CD-ROM  
Battery Pack  
Type A  
3500mAH NiMH  
Pointing Device  
PCMCIA  
Glide Pad  
2 x Type II / 1 x Type III  
Keyboard  
87/88 Keyboard (Windows 95)  
EPP/ECP Parallel  
Serial Port  
VGA Port  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
PS/2 Port  
DC-in Jack  
Audio Port  
IR Port  
Expansion Port  
Power Code  
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General Specifications  
2-7  
SYSTEM BOARD SPECIFICATIONS  
The following table lists system board specifications.  
Table 2-3 Main Board Specifications  
ITEM  
SPECIFICATION  
NS Clock Buffer CGS74CT 2524  
Clock  
CPU  
PGA Socket  
Cache  
256KB, L2  
DRAM  
1M x 16-bit DRAM x 4  
Video RAM  
System Chipset  
256K x 16-bit DRAM (5V / 60ns), SOJ x 2  
UMC UM8891BN, 208 Pin, PQFP  
UMC UM8892BN, 208 Pin, PQFP  
C&T 65548, 208 Pin, PQFP  
VGA  
PCMCIA  
Omega 82C094, 208 Pin, TQFP  
Omega 82C028, 28 Pin SOIC  
Internal  
To System PCB:  
100 Pin, AMP  
To HDD:  
Connector &  
Socket  
50 Pin, KEL  
To CD-ROM:  
40 Pin, KEL  
2 Pin, Molex  
To Transfer PCB:  
2 Pin, Molex  
To DC Converter  
32 Pin, Suyin  
COM1:  
External  
Connector  
9 Pin, Suyin  
Printer:  
25 Pin  
Docking:  
160 Pin  
PCB  
Thickness: 1.2mm  
Layers: 8  
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2-8  
General Specifications  
TRANSFER BOARD SPECIFICATIONS  
The following table lists Transfer board specifications.  
Table 2-4 Transfer Board Specifications  
ITEM  
SPECIFICATION  
Internal Connector  
To FDD:  
100 Pin, AMP  
To second battery  
100 Pin, AMP  
PCB  
Thickness: 1.2mm  
Layers: 4  
CONVERTER BOARD SPECIFICATIONS  
The following table lists Converter board specifications.  
Table 2-5 Converter Board Specifications  
ITEM  
SPECIFICATION  
Internal Connector  
To I/O PCB:  
32 Pin, Suyin  
To 1st Battery:  
10 Pin, Suyin  
To Y-Cable Connector:  
32 Pin, Suyin  
To AC Adapter  
2 Pin  
External Connector  
PCB  
Thickness 1.2mm  
Layers: 6  
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2-9  
LED INDICATOR BOARD SPECIFICATIONS  
The following table lists LED indicator board specifications.  
Table 2-6 LED Indicator Board Specifications  
ITEM  
SPECIFICATION  
Internal Connector  
To System PCB  
50 Pin, Suyin  
To System PCB  
40 Pin, Suyin  
To LCD Panel  
50 Pin, KEL  
To Inverter  
8 Pin, Molex  
To Left Speaker  
2 Pin, Molex  
To Right Speaker  
2 Pin, Molex  
To LCD Panel  
41 Pin, KEL  
To IR  
8 Pin, Temic  
To USB  
4 Pin, AMP  
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2-10  
General Specifications  
I/O BOARD SPECIFICATIONS  
The following table lists I/O board specifications.  
Table 2-7 I/O Board Specifications  
ITEM  
SPECIFICATIONS  
Clock  
Crystal 14.318 MHz, DIP Type  
Crystal 32.768KHz, DIP Type  
Crystal 4 MHz, DIP Type  
Generator:  
AV9154-43, SOP 16 Pin  
Buffer:  
CGS74CT2524  
ROM  
Flash ROM for BIOS  
256K x 8, 150ns  
System Chip Set  
Super I/O  
UMC UM8886BN, 208 Pin, PQFP  
NS87336, 100 Pin, PQFP  
Keyboard Controller  
Micro Controller  
CMOS Battery  
Audio  
Mitsubishi 38813M4, 64 Pin, QFP  
PIC16C62, 28 Pin, SOIC  
VARTA 60mA, 3.6V NiMH Battery  
ES17888 Sound Chip, 100 Pin, PQFP  
ROHM BA77786FS, 25 Pin, SOIC  
Amplifier  
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2-11  
Table 2-7 I/O Board Specifications (cont’d)  
SPECIFICATIONS  
ITEM  
Internal Connector  
To System PCB  
100 Pin, AMP  
To System PCB  
100 Pin, AMP  
To HDD Unit  
50 Pin, KEL  
To CD ROM Unit  
40 Pin, KEL  
To RTC Battery  
2 Pin, Molex  
To Transfer PCB  
40 Pin, Suyin  
To DC Converter  
32 Pin, Suyin  
COM1  
External Connector  
9 Pin, Suyin  
Printer  
25 Pin, Suyin  
Docking  
160 Pin, Berg  
PCB  
Thickness: 1.2 mm  
Layers: 6  
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2-12  
General Specifications  
LCD INVERTER BOARD SPECIFICATIONS  
The following table lists LCD inverter board specifications.  
Table 2-8 LCD Inverter Board Specifications  
ITEM  
Specification  
Color Inverter  
Panasonic 12.1” DSTN  
LMG9980ZWC  
Input Voltage  
8V to 20V  
500VAC Max.  
28V ~ 31V  
6mA (Max.)  
Hot Key  
Output Voltage  
Contrast Voltage  
Output Load Current  
Brightness Control  
Contrast Control  
Efficiency  
Hot Key  
70% Min.  
Unit Size (L x W x H) 146 (L) x 22.5(W) x 9.5 (H)  
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General Specifications  
2-13  
LED STATUS INDICATORS  
The following table lists NEC Versa 2500 Series LEDs. For example, the AC IN LED lights  
to indicate power is on and that the battery is charging.  
Table 2-9 Status LED Descriptions  
ITEM  
LED  
PMU Enabled  
HDD, FDD and CD-ROM Read / Write  
PC Card Slots Read / Write  
Num Lock  
Caps Lock  
Scroll Lock  
DISKETTE DRIVE SPECIFICATIONS  
The following table lists the standard diskette drive specifications.  
Table 2-10 Diskette Drive Specifications  
Specification  
ITEM  
Module  
Mode  
3.5” Module  
2 Mode FDD (1.44 MB / 720 KB)  
110mm (L) x 96mm (W) x 12.7mm (H)  
Unit Size  
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2-14  
General Specifications  
HDD UNIT SPECIFICATIONS  
The following table lists the standard hard drive specifications.  
Table 2-11 Hard Disk Drive Specifications  
ITEM  
SPECIFICATION  
Module  
2.5” Removable HDD Module  
1.4 GB  
Capacity  
Interface  
Unit Size  
Enhanced IDE Interface  
100mm (L) x 70mm (W) x 12.7mm (H)  
CD-ROM SPECIFICATIONS  
The following table lists the standard CD-ROM reader specifications.  
Table 2-12 CD-ROM Reader Specifications  
ITEM  
SPECIFICATION  
Module  
8X CD-ROM (TEAC)  
IDE Interface  
Mode  
Data Transfer  
Unit Size  
13.3 MB/sec  
140.5mm (L) X 130.6mm (W) X 17.0mm (H)  
NIMH BATTERY PACK SPECIFICATIONS  
The following table lists the standard battery specifications.  
Table 2-13 Battery Specifications  
ITEM  
SPECIFICATIONS  
Capacity  
Cell Type  
Voltage  
3500 mA x 10 cells  
Long A  
12V  
Connector  
10-Pin  
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2-15  
DC/DC CONVERTER & BATTERY CHARGER SPECIFICATIONS  
The following table lists DC/DC converter & battery charger specifications.  
Table 2-14 DC/DC Converter & Battery Charger  
Specifications  
ITEM  
SPECIFICATION  
Input Voltage  
Output Voltage  
Output Current  
6V -> 19V  
12V, 5V, 3.3V  
0.1A, 2.5A, 2.5A  
150mV, 100mV, 100mV  
Output Ripple  
Voltage  
Protection  
Short Circuit Protection, OCP  
Input under voltage latch  
80% Min. (Typ.)  
Efficiency  
PCB  
1.2mm / 6 Layers  
BATTERY CHARGER SPECIFICATIONS  
The following table lists battery charger specifications.  
Table 2-15 Battery Charger Specifications  
ITEM  
SPECIFICATION  
Input Voltage  
Support Battery  
Protection  
20V (Max.)  
NiMH Battery (12V)  
Max. Temp., Max. Timer  
Delta T / Delta t: 1oC (min.)  
Charge Method  
53 oC ~ 60 oC  
Max. Temperature  
Timer Setting  
Charge Time  
360 Min.  
Machine On: 6 hours  
Machine Off: 1.5 hours  
BQ2005  
Charge IC  
Connector  
To M/B:  
10 Pin & 18 Pin, Male, Straight, DIP/SMT  
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2-16  
General Specifications  
KEYBOARD SPECIFICATIONS  
The following table lists keyboard specifications.  
Table 2-16 Keyboard Specifications  
ITEM  
SPECIFICATION  
Key Switch Type  
Key Stroke  
Membrane  
3.0 ± 0.5mm  
50 ± 20GF  
19.05mm  
Operating Force  
Key Pitch  
AC/DC ADAPTER SPECIFICATIONS  
The following table lists AC/DC adapter specifications.  
Table 2-17 AC/DC Adapter Specifications  
ITEM  
SPECIFICATION  
Input Voltage  
Ripple Noise  
Output Voltage  
Protection  
AC 90V -> 265V, 50 -> 63Hz  
100mvp-P  
20V Max.  
Short Circuit UVP, OVP  
Safety Approval, FCC Shielding AC cord  
2-pin, 100cm long with coil at system end  
AC Power On  
AC Cord  
DC Output Cable  
Indicator  
Unit Size  
120mm (L) x 62mm (W) x 36mm (H)  
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General Specifications  
2-17  
BIOS SPECIFICATIONS  
The following table lists BIOS specifications.  
Table 2-18 BIOS Specifications  
Specification  
ITEM  
Floppy Disk Drive  
Support standard 3.5” FDD  
Support 720KB and 1.44 MB Modes  
Support Standard IDE Hard Disk  
Auto-detect IDE Features  
Hard Disk Drive  
VGA Display  
Support LBA mode for larger capacity  
Use Chips OC65548 VGA BIOS to support Monitor Sense or Auto  
Display  
PCI Super VGA Function Call  
8 Sets Built-In Panel Parameters  
Serial Port  
Support Standard COM Port Address with optional selection on  
Setup Menu  
Support for IR communication port  
Parallel Port  
Support EPP, ECP, and Standard Printer Port Address  
Provide Optional Item in Parallel Port on Setup Menu  
Always enable VGA and System BIOS Shadow  
Phoenix PCM Plus will be provided  
Shadow & Cache  
PCMCIA  
PCMCIA 2.1 Specification Compliance  
External Device  
Support  
Interface of external PS/2 mouse and external keyboard  
The internal Glide Pad will be disabled while external PS/2 mouse  
is connected  
CD-ROM  
APM  
Can save power during Suspend Mode  
Supports APM 1.1 Specification  
Full On Mode  
Power Management  
Support  
Doze Mode  
Standby Mode  
Suspend Mode (Suspend to RAM)  
Save to Disk  
System Off Mode  
VGA Display  
Boot on simultaneous display while external monitor attached  
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2-18  
General Specifications  
Table 2-18 BIOS Specifications (cont’d)  
ITEM  
Specification  
Suspend (To RAM)  
STR can be invoked by Hot-Key, Cover-Switch, Battery Low-Low  
Condition, & Operating System request  
STR can be resumed by Keyboard & Power button  
Save To Disk  
STD can be invoked by Hot-Key, Cover-Switch, Battery Low  
condition & Operating System request  
STD can be resumed by Power Button only.  
MICRO-CONTROLLER FUNCTION DESCRIPTION  
The following table lists Micro-Controller specifications.  
Table 2-19 Micro-Controller Specifications  
ITEM  
SPECIFICATION  
Y-Connector Support External PS/2 Mouse and External Keyboard can be used  
LED Connector  
Caps Lock and Scroll Lock Status should be kept during Suspend  
Process.  
Support AC-IN, Battery-Charging, Battery-Low, Suspend-To-RAM  
Status LED  
System Peripheral  
Control  
Support the Audio/Contrast/Brightness control  
Support the Backlight control  
SMI Signal  
Edge Trigger (High Active)  
Activity Events  
Hot-Key Press  
Battery Low & Battery Low-Low  
Cover Switch =>  
Enter into Suspend Mode or Turn off Backlight via CMOS Setup  
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2-19  
POWER MANAGEMENT FEATURES (MODE DEFINITION)  
The following table lists power management specifications.  
Table 2-20 Power Management Modes  
Mode  
Device  
Speed  
Full-On Mode  
CPU State  
Full speed  
Normal  
Peripherals State  
Doze Mode  
Timer  
On / Off  
CPU State  
Stop Grant State  
Slow Refresh  
Normal  
DRAM State  
Peripherals State  
Activity Events  
Video Monitoring, Keystrokes,  
FDD, HDD, COM1, COM2,  
LPT2, Audio  
Standby Mode  
Timer  
Off/1/2/4/8/16 Min.  
Stop Clock  
CPU State  
DRAM State  
VGA State  
Audio State  
AMP Circuit  
HDD State  
LCD state  
Slow Refresh  
Standby  
Power Down  
Power Down  
Power Down  
Backlight Off, Negative Volt.  
Off  
Video Monitoring, Keystrokes,  
FDD, HDD, COM1, COM2,  
LPT1, Audio  
Activity Events  
Suspend To RAM  
Timer  
Off/1/2/4/8/16 Min  
Stop Clock  
CPU State  
DRAM State  
LCD State  
Slow Refresh  
Backlight off, Negative Volt. Off  
Power Down  
VGA, HDD, I/O Chip, PCMCIA,  
Audio, AMP Circuit, KBC, Clock  
Generator  
UM8890BN  
Power-On Group  
Activity Events  
Keyboard, Power, Com1,  
Fax/Modem, PCMCIA Ring  
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2-20  
General Specifications  
Table 2-20 Power Management Modes  
Mode  
Device  
Speed  
Suspend To Disk  
Timer  
Off/1/2/4/8/16 Min  
CPU State  
Off  
Power System  
Power-On Group  
Off  
Micro-Controller  
Activity Events  
CPU State  
Power Switch  
CPU Clock/2  
Battery Low  
Condition  
LCD State  
Battery Low / Low  
Condition  
CPU State  
Off  
Off  
System Power  
POWER MANAGEMENT FEATURES (MODE TRANSITION)  
The following table lists power management transition modes.  
Table 2-21 Mode Definitions  
FROM/TO  
FULLY-ON  
DOZE  
SLEEP  
SUSPEND  
Fully-On  
Doze  
X
3
6
8
1
X
4
2
5
7
X
X
X
X
Sleep  
X
X
Suspend  
1. Doze Mode Time-Out  
APM CPU-Idle  
2. APM Power Management Event: System Suspend Request Notification  
Battery Low - Low Condition  
Suspend Events Occurs  
3. Fully-On Activity Events Occur  
4. Sleep Mode Time-Out  
5. Sleep Timer Disabled and Suspend Mode Time-Out  
Battery Low - Low Condition  
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General Specifications  
2-21  
6. Fully-On Activity Events Occur  
7. Suspend Mode Time-Out  
Battery Low - Low Condition  
8. Resume Events Occur  
HOT KEY DEFINITION  
The following table lists hot key definitions.  
Table 2-22 Hot Keys  
FUNCTION KEY  
CONTENT  
Fn + Esc  
Fn + F10  
Fn + F11  
Fn + F8  
Suspend  
LCD/CRT/SIMUL. Display  
Panel Backlight On/Off  
PC Speaker Only  
Fn + right  
Fn + left  
Fn + PgUp  
Fn + PgDn  
Fn + up  
Contrast Up  
Contrast Down  
Speaker Volume Increases  
Speaker Volume Decreases  
Brightness Increases  
Brightness Decreases  
Numeric Lock  
Fn + down  
Num  
ENVIRONMENTAL SPECIFICATIONS  
The following table lists appropriate operating temperatures.  
Table 2-23 Environmental Specifications  
SPECIFICATION  
ITEM  
5 oC ~ 35 oC (80%)  
-20 oC ~ 60 oC (90%)  
Operating Mode  
Non-Operating  
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2-22  
General Specifications  
POWER SOURCE SPECIFICATIONS  
The following table lists system power specifications.  
Table 2-24 Power Specifications  
Input  
Nominal  
Version  
AC Voltage  
100 ~ 250 V  
50 / 60 Hz  
90 ~ 265 V  
47 ~ 63 Hz  
AC Frequency  
VIBRATION SPECIFICATIONS  
The following table lists vibration specifications.  
Table 2-25 Vibration Specifications  
MODE  
ITEM  
Operating Mode  
Direction of Movement: X, Y, Z Axis  
Vibration Level: 5 ~ 500 ~ 5 Hz, 0.5 Gs Acceleration  
Duration Time: 60 min. for each axis  
Non-Operating  
Direction of Movement: X, Y, Z Axis  
Vibration Level: 5 ~ 500 ~ 5 Hz 2 Gs Acceleration  
Duration Time: 60 min. for each axis  
SHOCK SPECIFICATIONS  
The following table lists system shock specifications.  
Table 2-26 Shock Specifications  
MODE  
ITEM  
Operating Mode  
Impact Accelerator: 1g/10g Based on Half Sine-Wave Shock  
Pulses of 11 Msec  
Number of Shock: 3 Shocks for each of the 6 faces  
Direction of movement: 6 Faces  
Non-Operating Mode Impact Accelerator: 10g, 20g, 30g, 40g, 50g Based on Half Sine-  
Wave Shock Pulses of 11Msec  
Number of Shock: 3 Shocks for each of the 6 faces  
Direction of Movement: 6 Faces  
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General Specifications  
2-23  
ELECTRO-STATIC DISCHARGE (ESD) SPECIFICATIONS  
The following table lists static discharge specifications.  
Table 2-27 Electro-Static Discharge Specifications  
ITEM  
SPECIFICATION  
Contact Discharge  
Air Discharge  
HCP  
±2, 4, 8, 12.5, 15 kV  
±2, 4, 15 kV  
±2, 4 kV  
VCP  
±2, 4 kV  
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Section 3  
Hardware Functional Overview  
The NEC Versa 2500 Series notebooks consist of several major functions and subsystems  
including:  
system BIOS – implemented on the system board and Flash ROM  
system processor – implemented on the system board  
system logic controller – implemented on the I/O Board  
memory subsystem – implemented on the system board  
video subsystem – implemented on the I/O board, LED board, and LCD display  
panel  
I/O subsystem – implemented on the I/O board  
keyboard subsystem – implemented on part of the system board, and keyboard as-  
sembly  
PCMCIA controller and sockets – implemented on the system board  
pointing device subsystem – implemented on the I/O board and keyboard assem-  
bly  
hard disk subsystem – implemented on the system board and the hard drive as-  
sembly  
floppy disk subsystem – implemented on the system board and the diskette drive  
CD-ROM subsystem – implemented on the system board and the CD-ROM  
reader  
power subsystem – implemented on the power supply board, inverter board, bat-  
tery packs, and AC adapter  
A simplified block diagram of the notebook is shown on the next page.  
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3-2  
Hardware Functional Overview  
FUNCTIONAL BLOCK DIAGRAM  
The following figure shows the NEC Versa 2500 Series functional diagram.  
FLASH BIOS  
256KB  
CARD 0  
PCMCIA  
OMEGA  
82C094  
Bank 0  
8MB  
(on-board)  
CARD 1  
GLIDE PAD  
EXT. KB/MOUSE  
INTERNAL KB  
CORE CHIP  
UMC  
UM8891BF-N,  
UM8892BF-N,  
UM8886BF-N  
Bank 1  
8, 16MB  
(DIMM)  
KB  
CONTROLLER  
MITSUBISHI  
M38813M4  
Cache RAM  
L2: 256 KB  
write back  
COM1  
PRINTER  
HDD  
Pentium  
P54CSLM-  
133MHz  
SUPER I/O  
NS PC87336VLJ  
VGA CHIP  
C&T 65548  
VIDEO RAM  
1MB  
FDD  
LLM  
INVERTER  
CRT ON  
+3.45V  
AC or DC  
ADAPTER  
+5V  
DC/DC  
CONVERTER  
66MHz  
+12V  
CLOCK GEN  
ICS  
AV9154-43  
14.318MHz X'TAL  
24MHz  
Battery IN  
14.318MHz  
Figure 3-1 Functional Block Diagram  
SYSTEM BIOS  
The primary function of the system BIOS (Basic Input-Output System) is to provide a se-  
ries of software interrupts, functions, and sub-functions that control operations on certain  
devices, such as the hard disk drive, the floppy drive, and the video subsystem.  
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Hardware Functional Overview  
3-3  
The NEC Versa 2500 Series uses the Phoenix BIOS. The BIOS Setup program is an easy-  
to-use system utility configuration that sets system parameters and copies them on the Flash  
ROM chip with the system BIOS.  
The Flash ROM chip also includes BIOS Power-On Self Test (POST) diagnostic and boot-  
ing codes that tests the system components, initializes certain data structures, and boots the  
operating system.  
System Processor  
The system processor function for the notebook is implemented on the system board using  
an Intel P54CSLM-133 MHz processor chip. The processor operates in conjunction with  
the RAM and ROM memory plus other system control logic (e.g. UMC 8486F) to process  
software instructions (BIOS, Windows, applications).  
The Intel P54CSLM microprocessor is a high performance 586-class CPU which is com-  
patible with all the popular x86 operating systems including DOS, Windows, Windows NT,  
Windows 95, UNIX, Novell, and OS/2. The super pipelined architecture of the integer unit  
combined with single cycle execution, branch prediction, 16-Kbyte write-back cache, and  
single cycle instruction decode results in true 586-class performance. These features result  
in a 60 to 90 percent gain in processing speed compared to the Cyrix 486DX2-50.  
Additionally, the P54CSLM CPU provides many power savings features making it ideal for  
power sensitive systems like notebook computers. Aside from operating at 3.45V only, the  
CPU clock can also be completely stopped. Moreover, the CPU automatically powers down  
the FPU and other internal circuits when not in use. Fast entry and exit from the SMM  
mode allows frequent use of the SMM feature without noticeable performance degradation.  
Major Functional Blocks  
The Intel P54CSLM, in a 320-pin TCP packaging, is divided into five major functional  
blocks:  
Integer Unit  
Floating Point Unit  
Cache Unit  
Memory Management Unit  
Bus Interface Unit  
Instructions are executed in the Integer Unit pipeline and in the Floating Point Unit (FPU).  
The Cache Unit stores the most recently used data and instructions and provides fast access  
to this information for the Integer and Floating Point Units.  
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3-4  
Hardware Functional Overview  
When external memory access is required, the physical address is calculated by the Memory  
Management Unit and then passed to the Bus Interface Unit (BIU). The BIU provides the  
interface between the external system board and the processor’s internal execution and  
cache units.  
SYSTEM LOGIC CONTROLLER  
The System Logic Controller function for the notebook is implemented on the system board  
using UMC 8890 Series Notebook Chipset. The UM8890 is an advanced 586 compatible  
single chip specially designed for notebook computers and other portable computers. Aside  
from supporting almost all 586-based CPUs, the UM8890 also integrates PMU, System  
Controller, RTC and Peripheral Controller (206) into a single 208 QFP package.  
Features Summary:  
System  
Fully compatible with IBM PC/AT  
Supports PCI Bus-Master mode  
System Operation Voltage from 3V to 5.5V  
Three programmable non cacheable regions  
Flash ROM Boot block erase protection  
Supports general purpose I/O  
Hybrid Voltage  
208 Pins QFP  
Integration  
Built-in 206  
Built-in 146818A  
Built-in Memory Controller  
Memory Controller  
Supports ROM DOS up to 64 MB by XIP, 16 MB by EMS  
Supports Shadow RAM from C0000-FFFFF  
Supports Slow and Self Refresh DRAM  
Supports Stagger Refresh  
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Hardware Functional Overview  
3-5  
On-board Memory up to 48 MB  
Supports Three Memory Banks  
Supports Page Mode/Burst Mode Operation  
Supports 512KBx8, 1Mx4, 1Mx16, 2Mx8 and 4Mx4 type DRAM  
Supports 8 or 16 bit ROM configuration  
Programmable DRAM timing for each bank  
Power Management  
Supports up to Ten Programmable PMC Outputs  
Supports Multiple Power Saving Mode  
All Register Read/Writeable for 0V SUSPEND  
Microsoft APM Compatible  
Supports 0V SUSPEND  
Demand Driven Clock Control  
Supports Resume/Suspend  
Auto-Wake Up Function  
Three Low Battery Monitor Input  
System Operating Voltage from 3V to 5.5V  
Low Power Consumption (at 3.3V)  
* 50mA at Full On Mode  
* 25mA at Doze Mode  
* 100uA at Suspend Mode  
* 15uA at Power Off Mode with RTC Active  
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3-6  
Hardware Functional Overview  
MEMORY SUBSYSTEM  
The memory subsystem, implemented on the system board, includes ROM and DRAM  
memory. Primary control for the memory subsystem is provided by the UMC 8890 System  
Controller chipset.  
DRAM Memory  
The NEC Versa 2500 notebooks contain 16 MB of 70ns page-interleaved DRAM on the  
system board. The notebook provides one extra memory slot for upgrading the DRAM  
memory to 8 MB, 16 MB, 24 MB, 32 MB, 40 MB, & 48 MB using standard JEDEC or  
EDO small-outline DIMM memory modules. (Refer to Chapter 1 on System Upgrades to  
know more about how to upgrade the system memory).  
ROM Memory  
The NEC Versa 2500 Series notebooks contains both the main system BIOS and the VGA  
BIOS with Shadow BIOS capability.  
I/O SUBSYSTEM  
The I/O Subsystem of the notebook is implemented on the I/O Board using the NS  
PC87336VLJ chipset. The supported I/O interface on the notebook includes the internal  
hard disk drive interface, the internal floppy disk drive interface, the external printer port  
interface, the external serial port, and the external PS/2 keyboard and mouse ports.  
Feature’s summary of the NC87336VLJ:  
Compatible with IBM AT architecture  
Supports up to two 360K, 720K, 1.2M, or 1.44 MB floppy disk drives  
Supports IBM PC/AT interface to IDE (Intelligent Drive Electronics)-type Win-  
chester drives  
Hardware or software configuration  
Address decoding and strobe generator for game port  
Supports two serial port functions  
Supports one bi-directional IBM PS/2 compatible parallel port function  
All functions can be enabled or disabled individually  
Configuration Register can be easily selected  
Only one 24 MHz crystal needed  
100-pin plastic flat package  
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Hardware Functional Overview  
3-7  
VIDEO SUBSYSTEM  
The video subsystem, implemented on the system board and on the LCD Panel, controls the  
display output to both the LED Panel and to the external VGA port.  
The video subsystem utilizes the C&T 65548 High Performance Flat Panel / CRT VGA  
Controller. It also includes 1 MB DRAM memory, 32-bit DRAM bus, and separate display  
and memory clocks. An additional frame buffer/accelerator DRAM increases the available  
memory bandwidth for CPU accesses.  
Video Chipset Controller  
The C&T 65548 initiates a family of 208-pin, high performance for the full-featured note-  
book that requires the highest graphics performance available. The 65548 achieves superior  
performance through direct connection to system processor buses up to 32-bits in width.  
When combined with the CHIPS’ advanced linear acceleration software driver technology,  
this device exhibits exceptional performance compared with devices of similar architecture.  
The 65548 also adds a sophisticated 32-bit graphics hardware engine for the Bit Block  
Transfer (BITBLT), line drawing, hardware cursor, and other functions intensively used in  
Graphical User Interface (GUIs) such as Microsoft Windows.  
Features Summary:  
Highly integrated design (flat panel/CRT VGA controller, RAMDAC, clock syn-  
thesizer)  
Multiple Bus Architecture Integrated Interface  
Local Bus (32-bit CPU Direct and VL)  
EISA/ISA (PC/AT) Bus  
PCI Bus  
Flexible display memory configurations  
Two 256K x16 DRAMs (1 MB)  
Integrated programmable linear address feature accelerates GUI performance  
Hardware windows acceleration (65548)  
32-bit graphics engine  
System-to-screen and screen-to-screen BitBlt  
3 operand ROP’s  
Color expansion  
Optimized for Windows BitBlt format  
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3-8  
Hardware Functional Overview  
Hardware line drawing  
64x64x2 hardware cursor  
High performance resulting from zero wait-state writes (write buffer) and mini-  
mum wait-state reads (internal asynchronous FIFO design)  
Supports panel resolutions up to 800x600  
Supports non-interlaced CRT monitors with resolutions up to 1024x768 at 256  
colors  
True-color and Hi-color display capability with flat panels and CRT monitors up  
to 800x600 resolution  
Advanced power management features minimize power consumption during:  
Normal operation  
Standby (Sleep) modes  
Panel-Off Power-Saving Mode  
Power Sequencing control outputs regulate application of Bias voltage, +5V to  
the panel and +12V to the inverter for backlight operation  
Fully compatible with IBM VGA  
EIAJ-standard 208-pin plastic flat pack  
External VGA Capability  
The NEC Versa 2500 Series notebooks provide a 15-pin female D-type external VGA con-  
nector that can be connected to an external video graphics adapter (VGA) type monitor.  
Another feature of the notebook computer is the ability to auto-sense the display output to  
both LCD and the external CRT monitor. The notebook provides external resolution of  
1024x768 by 256 colors for the NEC Versa 2500 series with 1 MB video memory. The  
NEC Versa 2500 Series can also provide simultaneous display at 800x600 at 256 colors  
with the standard VGA DSTN LCD.  
KEYBOARD SUBSYSTEM  
The Keyboard Subsystem of the notebook is implemented on the I/O Board and Keyboard  
Assembly using the Motorola M 38813M4 keyboard controller chip.  
The NEC Versa 2500 Series keyboard is an 87/88-key, IBM enhanced-type keyboard with  
standard characters and function keys plus 12 programmable function keys. The notebook  
also provides an external PS/2 port for supporting an external PS/2 keyboard or standard  
DIN-type AT-keyboard. See Section 1 for more information.  
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Hardware Functional Overview  
3-9  
PCMCIA CONTROLLER AND SOCKETS  
The PCMCIA controller is implemented on the system board using Omega’s 82C094 Inter-  
face Controller. The 82C094 is compatible with the Intel i882092AA PCI to PCMCIA  
controller chip. It supports two independent 68 pin PC card sockets and is register com-  
patible with Intel’s 82365SL.  
The NEC Versa 2500 Series notebook provides PCMCIA slots that support two Type I, or  
Type II cards at the same time. or one Type III card on the upper slot and one Type I or II  
card on the bottom slot.  
Feature summary of the Omega 82C094:  
PC Card 95, PCMCIA 2.1, and JEIDA 4.1 compatible Interface  
Power Management Function that includes Individual Socket power control, Hot  
insertion/removal, Hardware/Software controlled power down, Modem Ring in  
Resume, CS Controlled Power Down, and Power Saving with Windows inactivity  
Direct connection to 33 MHz PCI bus and to PCMCIA sockets without glue logic  
Serial Power Control to support the designs with most PCMCIA power switch IC  
Legacy DMA and serial IRQ to directly support advanced PCI Core Logic  
Single-Chip PCMCIA host controller  
Supports CLOCKRUN# of the PCI Mobile Design Guide for power saving  
Intelligent power management for lowest operating power  
Programmable power management with individual socket activity counter  
Four-level FIFO and programmable PCMCIA interface timing  
Five programmable memory windows and two programmable I/O windows per  
socket  
Intel EXCA register compatible  
Register-set compatible to Intel i82092AA (PPEC) and Intel i82365SL  
208 Pin PQFP or TQFP  
HARD DISK SUBSYSTEM  
The hard disk subsystem, implemented on the system board and on the associated built-in  
hard disk drive, provides disk storage for all system software and user files.  
The NEC Versa 2500 Series notebook is equipped with a high capacity 1.4 GB hard disk  
drive that provides LBA (Logical Block Addressing) mode support. The I/O subsystem  
controller, NS PC87336CLJ, provides the IDE controller for the hard disk.  
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3-10  
Hardware Functional Overview  
The built-in controller can support any industry standard 2.5-inch IDE hard disk drive at  
19mm or 17mm height. Setting up the hard disk type is done automatically by the CMOS  
Setup program. Setup auto-detects the installed hard disk type settings for optimized per-  
formance.  
NOTE: Do not move the notebook when the  
HDD LED is activated. This protects the hard  
disk drive from any accidental damage or loss of  
data.  
DISKETTE DRIVE SUBSYSTEM  
The Diskette Drive Subsystem consists of a FDD controller provided by SMC 37C665IR  
and the built-in floppy disk drive. The floppy disk drive supports standard  
720KB and 1.44 MB mini-diskettes.  
3.5-inch  
POINTING DEVICE SUBSYSTEM  
The pointing device subsystem consists of the VersaGlide device on the system top cover  
assembly, and a pre-programmed Mitsubishi M38813M4 micro-controller that interfaces the  
mouse device to the system board. An external PS/2 port also supports the use of an exter-  
nal PS/2 compatible mouse which the system automatically detects during system power up  
and then disables the internal VersaGlide.  
POWER SUBSYSTEM  
The Power Subsystem consists of the following major sections:  
External AC Power Adapter  
Internal Battery Pack  
Power Board (on system board)  
LCD Inverter Board (in LCD Panel Assembly)  
Power Conservation Logic (part of system board)  
AC Power Adapter  
The computer is equipped with a universal AC power adapter that converts AC voltage (90  
to 265VAC, 47 to 63Hz) into DC voltage used to operate the notebook and charge the  
batteries.  
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Hardware Functional Overview  
3-11  
Internal Battery Pack  
The NEC Versa 2500 Series notebooks utilizes NiMH (Nickel Metal-Hydride) that pro-  
vides DC power for the notebook  
The battery pack contains ten size A battery cells that provide the system with 12V. When  
installed in the notebook, the battery LED automatically appears and will also start to re-  
charge whenever the AC adapter is connected to the notebook.  
Normal charging time for the battery pack is around 1.5 hours when the computer is turned  
off while it should take around 6 hours maximum when the computer is running.  
Power Board  
The power board receives approximately 12VDC from the battery pack and uses this input  
voltage to generate +12V, +5V, +3.3V, (+3.45V) regulated output voltages to provide  
power for all internal notebook board assemblies. The output of the +5V regulator also  
drives the LCD inverter circuit on the LCD inverter board assembly. Refer to Chapter 2 for  
more detailed information.  
LCD Inverter Board Assembly  
The LCD Inverter Board Assembly, located in the LCD Panel Assembly, converts the  
+5VDC input from the Power Board module of the system board into a high voltage AC  
output used to light the CCFT (Cold-Cathode Fluorescent Tube).  
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Section 4  
Field Service Guidelines  
This section contains preventive and corrective maintenance procedures for the NEC Versa  
2500 Series notebook computers. The first part of this section describes the computer  
cleaning procedures and preferred handling procedures for sensitive components (i.e., disk  
drives, batteries).  
The second part of this section identifies all field replaceable parts plus the removal and re-  
placement procedures for these parts.  
PREVENTIVE MAINTENANCE  
Preventive maintenance is limited to cleaning the plastic case, the keyboard, the display  
screen, and the diskette drive heads as required.  
NOTE: Remove the battery and disconnect the  
AC adapter before performing any maintenance.  
Voltage will be present inside the system unit and  
LCD even after the system has been turned off.  
Cleaning the Notebook’s Exterior  
Use the steps described below to clean the outer surface of the system.  
1. Power off the system, remove the primary battery pack, and unplug all cables  
connected to the system.  
2. Wipe the outside of the system unit, keyboard, and display with a soft, clean cloth.  
Remove any stains with water only. Use glass cleaner to clean the LCD indicator  
panel. Apply the glass cleaner directly to the cloth and then wipe the LCD indica-  
tor panel. Do not use solvents or strong, abrasive cleaners on any part of the sys-  
tem.  
3. Clean the keys with a damp cloth. A small, soft-bristle brush may be used to clean  
between the keys. Make sure to use a damp cloth (not wet) to prevent moisture  
from seeping between the keyboard and the metal plate, this could possibly dam-  
age the components under the keys. If the keyboard gets wet, thoroughly dry it  
before reassembling the system unit.  
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4-2  
Field Service Guidelines  
Cleaning the Notebook’s Interior  
When servicing the inside of the notebook to remove dust and other foreign particles pro-  
ceed as follows:  
1. Remove the top cover, hinge covers, status bar, and keyboard using the disas-  
sembly procedures discussed later.  
2. Dust or vacuum (with a rubber-tipped nozzle) the inside of the system unit, par-  
ticularly the system board surface. Use care to avoid damaging or dislodging any  
components or cables.  
3. Inspect all cable connectors for damage. Ensure that all connectors are seated  
properly before replacing the cover.  
Protecting the Disk Drives  
To protect the disk drives and data, we recommend that you back up the system disk peri-  
odically on diskettes. Occasionally use a head-cleaning diskette in the diskette drive to pro-  
long the life of the drive and to help maintain data integrity.  
Here are some preventive maintenance tips that we recommend you use when handling the  
hard disk:  
Periodically back up the data files from the hard disk.  
Run a virus detection program to identify possible viruses on the hard disk.  
Use SCANDISK to correct any errors found in the directory and File Allocation  
Table (FAT). This will also free up space from any unused sectors.  
Never turn the computer off when the hard disk is being accessed.  
Never move or raise the computer while the hard disk is being accessed, impor-  
tantly don't jar the hard disk, as this may cause a hard disk crash.  
Use hard disk maintenance programs like DEFRAG under DOS or Norton Utili-  
ties SPEEDISK to reorganize your hard disk by eliminating fragmentation and  
improving hard disk access time.  
Handling the Computer Battery Packs  
The battery packs furnished with the computer require reasonable care and handling to en-  
sure efficient operation and maximum life. Periodically inspect the battery terminals and the  
batteries for evidence of corrosion and/or oxide build-up.  
To ensure that the battery packs endure a normal life cycle, always observe the following  
precautions when handling the battery packs:  
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Field Service Guidelines  
4-3  
Do not drop the battery packs or subject them to excessive shock and vibration.  
Do not expose the battery packs to direct sunlight, moisture, or chemical com-  
pounds.  
Do not disassemble the battery packs.  
Do not use the battery packs to power other devices.  
Do not short the battery leads or connect the battery with reversed polarity.  
Never attempt to charge the battery packs in any way other than as described in  
this manual and the user’s guide.  
Always charge the battery packs as soon as possible after a low battery indication.  
Maintaining the LCD Quality  
Heat is the most common problem associated with the screen. After a lengthy work session,  
the typical routine is to shut down the machine and close the cover, but the display surface  
(no matter what type it is) and the components inside the computer radiate heat. So, when  
you close the cover, you will then trap this heat up against the screen. Leaving the computer  
cover open for about ten minutes while the heat disperses eliminates this potentially damag-  
ing situation.  
REQUIRED TOOLS AND EQUIPMENT  
All NEC Versa 2500 Series corrective maintenance procedures can be performed using the  
following tools:  
tweezers  
small flat-blade screwdriver  
small Phillips screwdriver  
small Hex-bolt screwdriver.  
NOTE: All boards, options and peripherals  
contain components that are sensitive to static  
electricity. When handling any of these items,  
protect against static discharge by using wrist or  
ankle grounding straps and grounded working  
mats. When moving or storing items, use the  
anti-static bags supplied with the items.  
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4-4  
Field Service Guidelines  
PARTS REMOVAL AND REPLACEMENT PROCEDURES  
This section contains field service-level removal/replacement procedures for the notebook.  
Refer to the exploded diagram later in this section to identify all relevant parts. The NEC  
Versa notebook is designed for optimum modularity in order to make field replacement  
maintenance easy and efficient.  
Removing/Replacing the Notebook Battery Pack  
The procedure for removing and replacing the battery pack is as follows:  
1. Turn off the computer. Close the LCD cover and turn the whole unit over.  
2. You will find a clamp latch (lock knob) that is securing the internal battery pack  
to the system unit. To remove the battery pack, push the lock knob sideways with  
one hand and with the other hand pull the battery pack out. Note that this has to  
be done simultaneously.  
3. To replace the battery pack again, simply slide the battery pack into the system  
unit until you hear the spring latch hook snap into place. The battery pack can  
only be inserted in one direction so there is no danger of improper insertion.  
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4-5  
Removing/Replacing the Hard Disk Drive Module  
The procedure for removing and replacing the hard disk drive module is as follows:  
1. Turn off the computer. Close the LCD cover and turn the whole unit over.  
2. You will find a clamp latch (lock knob) that secures the hard disk drive module to  
the system unit. To remove the hard disk drive module, push the lock knob side-  
ways with one hand and with the other hand pull the hard disk drive module out.  
Note that this has to be done simultaneously.  
3. To replace the hard disk drive, remove the four flat screws attaching it to the null  
hard disk assembly and remove the hard disk drive cable.  
4. To replace the hard disk drive module, reverse the above procedure.  
Figure 4-1 Hard Drive Module Assembly  
Removing/Replacing the Diskette Drive Module  
The procedure for removing and replacing the diskette drive is as follows:  
1. Turn off the computer. Close the LCD cover and turn the whole unit over.  
2. You will find a clamp latch (lock knob) that secures the diskette drive module to  
the system unit. To remove the diskette drive module, push the lock knob side-  
ways with one hand and with the other hand pull the diskette drive module out.  
Note that this has to be done simultaneously.  
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Field Service Guidelines  
3. To replace the diskette drive, remove the four flat screws attaching it to the null  
diskette assembly , two attaching the diskette cover and remove the diskette drive  
cable.  
4. To replace the diskette drive unit, remove the four small screws attaching it to the  
null diskette drive assembly and remove the diskette drive cable.  
5. To replace the diskette drive module, reverse the above procedure.  
Figure 4-2 Diskette Drive Module Assembly  
Removing/Replacing the LCD Status Bar Cover and Hinges  
Remove the LCD Status Bar Cover and Hinge Covers are as follows:  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. Slide the left and right hinge covers out to remove them.  
3. Lift the status bar cover out.  
4. To replace the LCD Status Cover and Hinge Covers, reverse the removal proce-  
dures mentioned above.  
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Field Service Guidelines  
4-7  
Removing/Replacing the Keyboard  
The procedure for removing and replacing the keyboard is as follows:  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. Lift the keyboard out and tilt the upper edge of the keyboard towards you, but do  
not lift the keyboard away. Rest the keyboard (face down) on the palm rest area.  
3. Remove the keyboard cable from the system board’s FPC type connector. To re-  
lease the keyboard cable from the connector, gently lift (using your fingernail or a  
thin pointed object) the connector locks on the left and right edge. Pull the key-  
board cable out and remove the keyboard from the notebook.  
4. To replace the keyboard; rest the keyboard face-down on the palm rest area. In-  
sert the keyboard cable into the FPC type connector on the system board and tilt  
the keyboard back into place.  
Removing/Replacing the Heat Plate  
This is a heat shield for the CPU and power board. Remember, the CPU is in contact with  
this part, so be careful when removing it from the unit.  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. Remove the six screws and carefully lift the heat pipe from the unit. (You do not  
need to remove this part if you are removing/replacing the LCD).  
WARNING: The CPU is sometimes attached to  
the heat pipe, so be careful not to damage the  
pins or the CPU may be inoperable.  
Removing/Replacing the CPU  
The procedure for removing the CPU is as follows:  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. The CPU is located at the left rear of the system base assembly under the heat  
pipe. The system board has been designed to allow the heat generated by the CPU  
to be released from the system.  
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Field Service Guidelines  
3. Slowly remove the CPU, moving around each side, little by little. Avoid damaging  
the CPU pins by forcing the CPU out of its slot immediately. Also, do not pull out  
the CPU heat sink as it is part of the CPU. You must remove the CPU and the  
heat sink together.  
4. To replace the CPU, align it with pin 1 of the socket and plug in the CPU. Make  
sure that the CPU pins are straight before inserting it. Broken or damage pins on  
the CPU may totally damage the CPU. To remount the CPU, reverse the disas-  
sembly procedure mentioned above.  
You do not need to remove this part if you are removing/replacing the LCD.  
Note: It is not necessary to remove the CPU  
when performing normal service on the Versa  
2500 Series.  
Removing/Replacing the Cover-Display LCD Assembly Module  
The procedure for removing the Cover-Display LCD Assembly Module is as follows:  
1. Turn off the computer. Follow all disassembly procedures for removing the hinge  
covers, status bar cover, and keyboard as mentioned earlier in this section.  
2. Remove the center screw on both hinge mounts, the grounding screw to the left  
of the connector on the LED Board assembly, and remove the connector from the  
LED board.  
3. Lift the Cover-Display LCD Assembly Module from off of the unit and set aside.  
4. To remount the Cover-Display LCD Assembly Module, reverse the disassembly  
procedure mentioned above.  
Removing/Replacing the System Top Cover Assembly and the NEC  
VersaGlide Assembly  
The procedure for removing and replacing the system top cover assembly and VersaGlide is  
as follows:  
NOTE: If you plan to continue remov-  
ing/replacing modules from the notebook you  
must follow all of the disassembly procedures  
mentioned from the start of this section.  
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4-9  
1. Turn off the computer and remove the Battery, Hard Disk Drive, and Diskette  
Drive Modules. Follow all disassembly procedures mentioned from the start of  
this section.  
2. Turn the System Unit upside down with the bottom facing up. Remove the nine  
screws securing the base unit assembly from the top unit assembly.  
3. Return the back to the normal position. Remove the screw located between the  
hinges above the LEDs. Next remove the screw located just under the speaker on  
the left side, the screw just to the right of the LEDs and the screw located to the  
right of the LCD cable connector. Lift the top cover from the base cover. Note,  
that the LCD, speaker, and the VersaGlide cables are all still attached to the sys-  
tem board. Pull these cables out and remove the whole top cover assembly.  
4. The VersaGlide module is assembled to the system top cover case. Turn the top  
cover case over and locate the VersaGlide printed circuit board. Remove the six  
screws securing the module and remove the VersaGlide assembly.  
5. To replace the whole top case assembly, reverse the removal procedures men-  
tioned above. We recommend that you remove the top cover screws first, then the  
bottom cover screws. Make sure to test the VersaGlide before entirely securing it  
to the top cover case.  
6. You do not need to remove the CPU unless you are going to replace it.  
Removing/Replacing the LED Board  
The procedure for removing the LED board is as follows:  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. The LED Board is located in the center rear of the system base unit. This board  
alerts you to the processes presently in use on the computer.  
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4-10  
Field Service Guidelines  
3. Remove the two screws and lift the board carefully out of the connections to the  
system board.  
Figure 4-3 The LED Board Module Assembly  
Removing/Replacing the System Board and I/O Board  
The system board and the I/O board are assembled together as one unit and must be re-  
moved from the base unit before being separated from each other. The procedure for re-  
moving the system board and I/O board is as follows:  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. Remove the two large posts from the center of the system board and the two  
screws from the lower leg of the I/O Board.  
3. From the back of the unit remove the six spacers and two screws around the four  
plug-in connectors.  
4. Since the system board is the main unit of the notebook, all of the other boards  
are connected to this electronic module either by connector or by cable. Special  
care should be taken when removing this module, so as not to damage any of  
these connectors and/or cables.  
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4-11  
Figure 4-4 The System Board and I/O Boards  
Separating the System Board and I/O Board  
The system board is attached directly to the I/O board. The following procedure should be  
taken to separate the two boards:  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. Remove the four medium spacers located along the top and left side edge and the  
one screw located at the center bottom of the system board.  
3. Slowly separate the I/O Board and system board, being cautious about the con-  
nectors coupling the two boards together.  
4. To reattach the I/O Board and system board, reverse the separation procedures  
mentioned above.  
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Field Service Guidelines  
Figure 4-5 The I/O Board Module Assembly  
Removing/Replacing the Power Board  
The procedure for removing the power board is as follows:  
1. Turn off the computer. Follow all disassembly procedures mentioned from the  
start of this section.  
2. Remove the two hex spacers from the center of the board and lift the module from  
the unit.  
3. To replace the power board module, reverse the removal procedures mentioned  
above.  
Figure 4-6 Power Board Module Assembly  
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Field Service Guidelines  
4-13  
ILLUSTRATED PARTS BREAKDOWN  
This section contains the illustrated parts breakdown (IPB) and NEC part numbers for the  
NEC Versa 2500 Series computer. Table 4-1 lists field-replaceable parts and corresponding  
part numbers. Figure 4-7 shows the field-replaceable parts for the docking station.  
Table 4-1 NEC Versa 2500 Series Field-Replaceable Parts*  
Item  
Description  
Part Number  
1
2
Main Battery (NiMH)  
TEAC CD-ROM Assembly  
AC Adapter  
21-90128-31  
25-00372-00  
12-00118-30  
22-30046-00  
21-90210-02  
51-70187-10  
51-70185-11  
24-40827-00  
71-30335-00  
22-20296-00  
25-41141-00  
24-40836-00  
71-10480-00  
12-00146-00  
24-40819-01  
3
4
AC Power Cord  
5
CMOS Battery  
6
DC/DC Board Assembly  
VersaGlide Assembly  
Cover, Left Hinge  
7
8
9
U.S. Keyboard  
10  
11  
12  
13  
14  
15  
LCD Cable Assembly, 12.1”  
NEC Model Nameplate, NEC Versa 2500  
LCD Front Panel Assembly, 12.1”  
LCD, Hitachi, 12.1”  
LCD Inverter  
LCD Rear Cover, 12.1”  
16  
17  
NEC Logo  
25-41140-00  
24-40828-00  
Cover, Right Hinge  
18  
19  
20  
21  
Status Cover  
24-408822-00  
24-40821-00  
51-90032-10  
24-50204-00  
Top Cover Assembly  
CPU, Pentium, 133 MHz  
I/O Port Bracket  
22  
23  
24  
25  
Audio Cover  
24-40826-00  
51-70184-00  
51-70182-21  
51-70183-30  
LED Board Assembly  
System Board  
I/O Board  
____________  
*
This data was prepared January, 1997. For an up-to-date listing of spare parts, please call FastFacts  
(800) 366-0476 and order document number 42200191.  
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Field Service Guidelines  
Table 4-1 NEC Versa 2500 Series Field-Replaceable Parts (cont’d)*  
Item  
Description  
Part Number  
26  
I/O Cover  
24-40794-10  
25-00371-00  
25-00239-00  
24-40810-10  
24-80631-10  
24-40793-10  
24-50227-00  
02-30109-00  
02-30110-00  
24-40795-10  
56-10076-00  
27  
1.4 GB Hard Disk Drive Assembly  
Diskette Drive Assembly  
ROM Door  
28  
29  
30  
Rubber Foot  
31  
Bottom Cover Assembly  
Keyboard Bracket  
32*  
33*  
34*  
35*  
36*  
8MB Memory Module (EDO)  
16MB Memory Module (EDO)  
Docking Door  
LCD Assembly, DSTN 12.1”  
*
Not shown in IPB figure.  
____________  
*
This data was prepared January, 1997. For an up-to-date listing of spare parts, please call FastFacts  
(800) 366-0476 and order document number 42200191.  
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Figure 4-7 NEC Versa 2500 Series Illustrated Parts Breakdown  
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Field Service Guidelines  
Packaging and Documentation  
Packaging and documentation part numbers are listed in Table 4-2.  
Table 4-2 Packaging and Documentation Part Numbers  
Description  
Model Number  
NEC Versa 2500 Series User’s Guide  
25-10584-00  
NEC Versa 2500 Series Service and  
Reference Manual (this guide)  
819-200191-000 Rev. 00  
Shipping Carton (1 set)  
25-20571-02  
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Section 5  
Troubleshooting and Repair  
This section focuses on providing you with some information on notebook basic trouble-  
shooting as well as the BIOS POST error codes and messages.  
SERVICE INFORMATION  
NEC service and information telephone numbers are listed in the following table.  
Table 5-1 NEC Service and Information Telephone Numbers  
Service  
To order NEC spare parts  
To order options in the U.S.  
Call  
In the U.S., call 1(800) 632-4525  
Local Sales Office  
To access the NEC Electronic Bulletin Board 1(508) 635-4706  
System (BBS)  
To download files - provides software drivers 1(508) 635-4706  
and the latest ROM BIOS  
NEC Service  
In the U.S., call 1(800) 632-4525  
Listen to the automated attendant and select the appropriate menu to reach one of  
the following departments:  
Information Center - literature, dealer locations, sales leads, response to ads  
NSRC (National Service Response Center) - questions other than products,  
spare parts or technical support  
Service Contracts  
TSC (Technical Support Center) - technical support for everyone else  
FastFactsTM - automated service that sends  
In the U.S. and Canada, call 1(800) 366-  
the latest information about NEC products to 0476  
the fax machine 24 hours a day  
Outside U.S.,  
Canadian Inquiries  
Technical Support  
1(416) 795-3554  
1-800-632-4525  
TECHNICAL SUPPORT  
NEC Technologies Technical Support Center (TSC) provides an E-mail service for Internet  
users besides the support listed in Table 5-1. Technical questions regarding NEC products  
can be sent over the Internet system to TSC. The Internet address is as follows:  
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Troubleshooting and Repair  
If it is more convenient, questions may also be faxed to TSC. The TSC fax number is:  
(508) 635-4666  
Along with the complete product name and question(s), be sure to included your name and  
fax number or Internet address, so that an expert can respond to your question(s).  
It would also be helpful to include your telephone number in case TSC can not get their an-  
swer to you through the Internet or by fax. TSC replies to all questions received by Internet  
or fax within one business day.  
PRODUCT INFORMATION  
NEC FastFacts is an automated electronic information service used to obtain up-to-date  
product application notes, installation procedures, troubleshooting tips, data sheets, techni-  
cal information bulletins, price lists, and other information.  
Information can be obtained from the FastFacts service 24 hours a day, 7 days a week. Us-  
ing a touch-tone telephone, call the FastFacts number, order the desired information  
through the automated attendant, and FastFacts will automatically send the information to  
you.  
Catalogs are available that list all of the documents and the document numbers. Current  
catalogs include:  
Catalog 1 - Monitors, Graphics Boards, and Data Projector Products  
Catalog 2 - CD-ROM Hardware and Software, Printers, and Disk Drive Products  
Catalog 3 - Laptop, Desktop, and Server Computer Products  
Catalog 9 - Price and Configuration Index  
Ordering Information from FastFacts  
Order information from FastFacts as follows:  
1. Check that the fax machine is on.  
2. Locate the document part number.  
3. Using a touch-tone telephone, call 1-800-366-0476 (U.S. and Canada only).  
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5-3  
For international; enter the international long distance access number, the U.S.  
telephone number, or the U.S. extension (01-630-775-7999).  
4. Listen to the instructions provided by the automated attendant.  
Press 1 to skip the FastFacts introduction and jump to the automated instructions  
for ordering a document or catalog.  
Press 2 for an introduction to FastFacts, followed by the automated instructions  
for ordering a document or catalog.  
5. When asked by the automated attendant, enter your fax number and telephone  
number.  
For international; first enter the international long distance access number (011),  
your country code, area or city code, and then your fax number.  
The information requested is automatically sent to your fax machine. If FastFacts  
attempts to send the second order before the first order is completed, the order  
may be canceled. After three tries, FastFacts assumes that the line is busy and  
does not process the order.  
HELPFUL STARTERS  
Here are some helpful items to check before troubleshooting the notebook:  
Is there any external power source connected to the computer?  
Has the battery been fully charged?  
Is the computer turned on and the POWER LED activated?  
Is the LCD display control switch moved to its minimum level?  
Is the LCD display switched to the external monitor?  
Are all cables and devices connected properly and securely?  
Have all needed device drivers been installed properly?  
Have you checked the AUTOEXEC.BAT and CONFIG.SYS files for errors?  
Is the Suspend Mode activated LED Status Bar? Press any key or press the power  
switch to wake up the system again.  
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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 com-  
puter during startup.  
POST Messages  
The following is a summary of the Phoenix BIOS startup error messages that are displayed  
on the notebook’s display. These messages will help you to understand many of the note-  
book’s problems that may be corrected by entering the CMOS SETUP program and  
checking the original values.  
Table 5-2 POST Error Messages  
Message  
Possible Cause  
Action  
Diskette drive A failure  
The drive failed or is  
missing.  
Check the drive to determine  
the problem.  
Diskette read failure -  
The diskette is either not  
formatted or is defective.  
Replace the diskette with a  
bootable diskette and retry.  
F1  
F2  
press  
to retry boot,  
for SETUP utility  
No display message,  
system will beep when  
adapter fails,  
The primary video adapter Check the primary video  
failed. adapter.  
Gate A20 failure  
The keyboard controller is Check the keyboard  
not accepting command,  
specifically, the enable  
and disable A20  
controller and system board.  
Turn the power off, then back  
on again. If the problem  
persists contact qualified  
NEC service personnel.  
command.  
Fixed disk configuration  
error  
The specified  
Correct the fixed disk  
configuration.  
configuration is not  
supported or doesn't  
match the actual hardware  
installed.  
Fixed disk controller  
failure  
The fixed disk may be  
defective.  
Try rebooting. If that doesn't  
work, replace the fixed disk.  
Fixed disk read failure-  
The fixed disk may be  
Check the drive type selected  
F1  
F2  
press  
to retry boot,  
configured incorrectly or is in SETUP. Try rebooting. If  
for SETUP utility  
defective.  
that does not work, replace  
the fixed disk.  
Pointer device failure  
The PS/2-style mouse  
failed.  
Try rebooting. If problem  
persists, check the mouse,  
it's cable and connector.  
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5-5  
Table 5-2 POST Error Messages (cont’d)  
Message  
Possible Cause  
Action  
No boot device available - Either diskette drive A:,  
F1 F2  
Try rebooting. If problem  
persists, replace the diskette  
press  
to retry boot,  
the fixed disk, or both the  
for SETUP utility  
diskette and fixed disk are or the fixed disk.  
defective.  
No boot sector on fixed  
F1  
The C: drive is not  
formatted or is not  
bootable.  
Format the C: drive and  
make it bootable.  
disk - press  
to retry  
for SETUP utility  
F2  
boot,  
Not a boot diskette - press The diskette in drive A: is  
Replace the diskette with a  
bootable diskette and try  
rebooting.  
F1  
F2  
to retry boot,  
SETUP utility  
for  
not formatted as a  
bootable diskette.  
No timer tick interrupt  
Shutdown failure  
The timer chip has failed.  
Check the system board,  
Turn the power off, then back  
on again. If the problem  
persists, contact qualified  
service personnel.  
Either the keyboard  
Check the keyboard  
controller is not accepting  
controller and system board.  
the reset command or the Turn the power off, then back  
associated reset logic has on again. If the problem  
failed.  
persists, contact qualified  
service personnel.  
Time of day not set - run  
SETUP program  
Real Time Clock is not  
set.  
Run SETUP utility.  
Timer 2 failure  
The timer chip has failed.  
Check the system board.  
Turn the power off, then back  
on again. If the problem  
persists, contact qualified  
service personnel.  
F2  
SETUP  
to enter ROM-based  
Invalid configuration  
information must be  
changed.  
You must run SETUP utility  
and correct configuration  
information.  
Invalid configuration  
information - please run  
SETUP  
Display adapter is  
configured incorrectly.  
Run the SETUP utility.  
Memory size is incorrect.  
Wrong number of diskette  
drives.  
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5-6  
Troubleshooting and Repair  
Table 5-2 POST Error Messages (cont’d)  
Message  
Possible Cause  
Action  
Keyboard clock line failure The keyboard, the  
keyboard cable  
Make sure the keyboard  
cable and keyboard are  
connected properly. Check  
the keyboard controller and  
the system board. Turn the  
power off, then back on  
again. If the problem persists,  
contact qualified service  
personnel.  
connection, or the  
keyboard controller is  
defective.  
Keyboard data line failure The keyboard controller  
firmware has failed.  
Check the keyboard  
controller and system board.  
Turn the power off, then back  
on again. If the problem  
persists, contact qualified  
service personnel.  
Keyboard stuck key failure A key is jammed.  
Locate the jammed key and  
fix it. Make sure the keyboard  
cable and keyboard are  
connected properly. Turn the  
power off, then back on  
again. If the problem persists,  
contact qualified service  
personnel.  
Memory failure at hex-  
value, read hex-value,  
expecting hex-value  
Circuitry associated with  
the memory chips has  
failed.  
Turn the power off, then back  
on again. If the problem  
persists, contact qualified  
service personnel.  
Unexpected interrupt in  
protected mode  
Hardware interrupt or NCI Check the timer chip or the  
occurred while in  
protected mode.  
interrupt controller on the  
system board.  
Real time clock failure  
The RTC or battery failed. Run SETUP and turn the  
power off and on. If the  
problem persists, replace the  
RT. battery. If the problem  
remains, contact qualified  
service personnel.  
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Troubleshooting and Repair  
5-7  
Informational Messages  
This section lists the messages that provide information to the user but require no action.  
Table 5-3 BIOS Informational Messages  
Message  
Meaning  
NCH Base Memory  
NCH Extended  
The amount of base memory that tested successfully.  
The amount of extended memory that tested  
successfully.  
Memory tests terminated by  
keystroke  
The message indicate that a user pressed the  
spacebar while memory tests were running and  
stopped the memory tests.  
F1  
Press the  
key to continue  
This message indicates that an error was found during  
F1  
POST. Pressing the  
attempt to reboot.  
key allows the system to  
Beginning memory test Press  
SPACEBAR  
A user can stop the memory tests by pressing the  
spacebar.  
the  
memory test  
to terminate the  
F1  
F2  
Press the  
key to continue,  
This message indicates that an error was found during  
F1  
to run the Setup utility  
POST. Pressing the  
attempt to boot. Press  
key allows the system to  
F2  
allows users to run the  
ROM-based SETUP utility to correct configuration  
information.  
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5-8  
Troubleshooting and Repair  
Run-time Error Messages  
The following table lists run-time error messages.  
Table 5-4 Run-time Error Messages  
Cause Action  
Message  
I/O card parity interrupt at  
address. Type (S)hut off  
NCI, (R)eboot, other keys to  
continue  
Memory on a peripheral card Check the memory cards  
has failed. installed in the system.  
Memory parity interrupt at  
address. Type (S)hut off  
NCI, (R)eboot, other keys to  
continue  
A memory chip(s) has failed. Replace the system board.  
Unexpected HW interrupt,  
interrupt at address. Type  
(R)eboot, other keys to  
continue  
Hardware problem. Not  
displayed if the expected  
interrupt handler is not  
enabled.  
Check all hardware in the  
system.  
Unexpected SW interrupt,  
interrupt at address. Type  
(R)eboot, other keys to  
continue  
Error(s) in the software  
Turn the machine off and  
program. Not displayed if the then on again. If doesn’t  
extended interrupt handler is work, check the program.  
not enabled.  
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Troubleshooting and Repair  
5-9  
QUICK TROUBLESHOOTING  
This section summarizes problems that may develop during system operation and lists sug-  
gested corrective actions.  
Table 5-5 Quick Troubleshooting  
Problem  
Corrective Actions  
No power  
Check that the AC adapter is plugged into the  
power connector of the system. Also, that the AC  
adapter is plugged into a properly grounded AC  
power outlet.  
If using the battery as main power source, check  
if the battery pack is of the right type, charged  
and is inserted correctly.  
Check the power board of the system. Is it  
inserted into the system board connector  
properly? Otherwise, replace the power board.  
Data on the LCD is unreadable  
Adjust the brightness and contrast display  
controls found on the right side of the LCD panel.  
Check if the LCD cables are inserted properly.  
Check also connections inside the LCD panel.  
Check if installed VGA driver is correct.  
Check VGA controller chip on the system board  
if there is any cold or loose soldering.  
Replace the system board.  
LCD screen does not show data  
Check the LED Status Bar if Suspend mode is  
activated. Press any key or press the power  
button to resume operation and display.  
Check if LCD cables are disconnected or loose.  
Check if the display output is switched to the  
external monitor.  
Check if the Contrast level is set to minimum.  
Check if there is power.  
Replace LCD Inverter board found inside the  
LCD Panel.  
Battery Power does not last  
Make sure that the power management features  
are enabled.  
Recharge the battery pack for 1½ hour before  
using again.  
Replace the battery pack.  
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5-10  
Troubleshooting and Repair  
Table 5-5 Quick Troubleshooting (cont’d)  
Problem  
Corrective Actions  
System halts during boot sequence  
Check condition of selected bootload device  
(diskette or hard disk) for bad boot track or  
incorrect OS files.  
Try booting from a new bootable diskette and  
recopy or repartition hard disk.  
Check for any BIOS error messages on the  
display screen.  
Replace the system board.  
I/O processing malfunctions  
Diskette drive does not work  
Check the connections of all internal devices.  
Replace the system board.  
Check if the diskette drive cable is connected  
properly.  
Check the diskette type if correct and not faulty.  
Replace the diskette drive.  
Replace the system board.  
Hard disk drive malfunction  
Check if hard disk drive is set properly on CMOS  
SETUP.  
Check the drive cables and connections.  
Check if the disk drive is good.  
Replace the system board.  
Memory malfunction  
Check if the memory module is inserted properly.  
Replace the memory module.  
Replace the system board.  
External keyboard or PS/2 mouse  
doesn’t work  
Check if keyboard or mouse are connected  
properly. Check Y-cable if it is being used. Power  
off system first before plugging in the device.  
Replace the keyboard or mouse.  
Replace the system board.  
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Troubleshooting and Repair  
5-11  
Table 5-5 Quick Troubleshooting (cont’d)  
Corrective Actions  
Problem  
PCMCIA card does not work  
Check the PCMCIA driver installation for any  
IRQ or IO address conflict.  
Check if the PCMCIA card is inserted properly  
and all connections are set.  
Replace the PCMCIA card.  
Check for work around for the card being used.  
Replace the system board.  
Serial device does not work  
Parallel device does not work  
Check if the serial device is connected properly.  
Replace the serial device.  
Check the I/O controller chip on the system  
board for any cold or loose soldering.  
Replace the system board.  
Check if all connections are properly set.  
Check if external device is turned on.  
Check I/O controller chip on the system board for  
any cold or loose soldering.  
Replace the system board.  
Check if the Port is enabled in Setup.  
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Appendix A  
Video Modes  
The C&T 65548 VGA chipset supports high resolution fixed frequency and variable fre-  
quency analog monitors in interlaced and non-interlaced modes of operation. Digital moni-  
tor support is also built-in. The tables in this section list all 65548 CRT monitor video  
modes.  
NOTE: The letter “I” under the Hex Mode col-  
umn for the succeeding tables denotes Interlaced  
monitors.  
VGA STANDARD MODES  
The following table lists VGA standard modes.  
Table A-1 VGA Standard Modes (Text Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel  
Resolution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
0, 1  
16  
40 x 25  
40 x 25  
40 x 25  
9 x 16  
360 x 400  
320 x 350  
320 x 200  
28.322  
25.175  
25.175  
31.5  
70  
8 x 14  
8 x 8  
2, 3  
7
16  
80 x 25  
80 x 25  
80 x 25  
80 x 25  
80 x 25  
80 x 25  
9 x 16  
8 x 14  
8 x 8  
720 x 400  
640 x 350  
640 x 200  
720 x 400  
720 x 350  
720 x 350  
28.322  
31.5  
31.5  
70  
70  
25.175  
25.175  
28.322  
Mono  
9 x 16  
9 x 14  
9 x 8  
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A-2  
Video Modes  
Table A-2 VGA Standard Modes (Graphics Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
4
5
6
4
4
2
40 x 25  
40 x 25  
80 x 25  
8 x 8  
8 x 8  
8 x 8  
320 x 200  
320 x 200  
640 x 200  
25.175  
25.175  
25.175  
31.5  
31.5  
31.5  
70  
70  
70  
Table A-3 VGA Standard Modes (Planar Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
D
16  
40 x 25  
80 x 25  
80 x 25  
80 x 25  
80 x 30  
80 x 30  
8 x 8  
320 x 200  
640 x 200  
640 x 350  
640 x 350  
640 x 480  
640 x 480  
25.175  
25.175  
25.175  
25.175  
25.175  
25.175  
31.5  
31.5  
31.5  
31.5  
31.5  
31.5  
70  
70  
70  
70  
70  
70  
E
16  
8 x 8  
F
Mono  
16  
8 x 14  
8 x 14  
8 x 16  
8 x 16  
10  
11  
12  
2
16  
Table A-4 VGA Standard Modes (Packed Pixel Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
13  
256  
40 x 25  
8 x 8  
320 x 200  
25.175  
31.5  
70  
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Video Modes  
A-3  
VGA EXTENDED MODES  
The C&T 65548 VGA BIOS supports standard VESA and extended modes, listed in the  
following table.  
Table A-5 VGA Extended Modes (Text Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display  
Font  
Size  
Pixel  
Resolution  
Dot Clock Horiz.  
Vert.  
Freq.  
Hz  
MHz  
Freq.  
KHz  
60  
61  
16  
16  
132 x 25 8 x 16  
132 x 50 8 x 16  
1056 x 400  
1056 x 400  
40.0  
40.0  
30.5  
30.5  
68  
68  
Table A-6 VGA Extended Modes (4-Bit Linear Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
20  
22  
24  
24I  
16  
16  
16  
80 x 30  
8 x 16  
640 x 480  
800 x 600  
1024 x 768  
25.175  
40.0  
31.5  
37.5  
48.5  
35.5  
60  
60  
60  
43  
100 x 37 8 x 16  
128 x 48 8 x 16  
65.0  
44.9  
Table A-7 VGA Extended Modes (8-Bit Linear Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
30  
256  
256  
256  
80 x 30  
8 x 16  
640 x 480  
800 x 600  
1024 x 768  
25.175  
40.0  
31.5  
37.5  
48.5  
35.5  
60  
60  
60  
43  
32  
100 x 37 8 x 16  
128 x 48 8 x 16  
34*  
34I*  
65.0  
44.9  
Table A-8 VGA Extended Modes (15-Bit Linear Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
40*  
32K  
80 x 30  
8 x 16  
640 x 480  
50.350  
31.5  
60  
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A-4  
Video Modes  
Table A-9 VGA Extended Modes (16-Bit Linear Mode) - 1MB Video  
Memory Only  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
41  
64K  
80 x 30  
8 x 16  
640 x 480  
50.350  
31.5  
60  
Table A-10 VGA Extended Modes (24-Bit Linear Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
50*  
16  
80 x 30  
8 x 16  
640 x 480  
65.0  
27.1  
51.6  
Table A-11 VGA Extended Modes (Planar Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
6A, 70 16  
100 x 37 8 x 16  
128 x 48 8 x 16  
800x 600  
40.0  
65.0  
44.9  
38.0  
48.5  
35.5  
60  
60  
43  
72, 75  
16  
1024 x 768  
72, 75I  
Table A-12 VGA Extended Modes (Packed Pixel Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
78  
16  
80 x 25  
80 x 30  
8 x 16  
8 x 16  
640 x 400  
640 x 480  
800 x 600  
1024 x 768  
25.175  
25.175  
40.0  
31.5  
31.5  
37.5  
48.5  
35.5  
70  
60  
60  
60  
43  
79  
256  
256  
256  
7C  
7E*  
7EI*  
100 x 37 8 x 16  
128 x 48 8 x 16  
65.0  
44.9  
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Video Modes  
A-5  
VGA HIGH REFRESH MODES  
The following tables list VGA high refresh modes.  
Table A-13 VGA High Refresh Modes (Packed Pixel Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
30  
256  
256  
80 x 30  
8 x 16  
640 x 480  
800 x 600  
31.5  
49.5  
37.5  
46.9  
75  
75  
32*  
100 x 37 8 x 16  
Table A-14 VGA High Refresh Modes (Planar Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
12  
16  
80 x 30  
8 x 16  
640 x 480  
800 x 600  
31.5  
49.5  
37.5  
46.9  
75  
75  
6A, 70 16  
100 x 37 8 x 16  
Table A-15 VGA High Refresh Modes (Packed Pixel Mode)  
Hex  
Mode  
No. of  
Colors  
Text  
Display Size  
Font  
Pixel Reso-  
lution  
Dot  
Clock  
MHz  
Horiz.  
Freq.  
KHz  
Vert.  
Freq.  
Hz  
79  
256  
256  
80 x 30  
8 x 16  
640 x 480  
800 x 600  
31.5  
49.5  
37.5  
46.9  
75  
75  
7C*  
100 x 37 8 x 16  
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BATTERY REPLACEMENT  
A CMOS clock battery in your computer maintains system configuration information. In the event  
that the battery fails to maintain system configuration information, NEC recommends that you re-  
place the battery. Have an authorized NEC service representative replace the battery.  
!
WARNING  
There is a danger of explosion if the battery is incorrectly replaced. Replace only with the  
same or equivalent type recommended by the manufacturer. Discard used batteries ac-  
cording to the manufacturer’s instructions.  
!
ATTENTION  
Il y a danger d’explosion s’il y a replacement incorrect de la batterie. Remplacer uniquement  
avec une batterie du même type ou d’un type recommandé par le constructeur. Mettre au rébut les  
batteries usagées conformément aux instructions du fabricant.  
BATTERY DISPOSAL  
The main battery and CMOS clock battery are made of nickel metal hydride (NiMH).  
Contact your local waste management officials for other information regarding the environmentally  
sound collection, recycling, and disposal of the batteries. For additional information on the proper  
collection or disposal of rechargeable batteries, please call 1-800-8-BATTERY.  
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Index  
heat plate, 4-7  
I/O board, 4-10  
keyboard, 4-7  
A
AC adapter  
LCD, 4-8  
connecting, 1-9  
LCD status bar cover, 4-6  
LED board, 4-9  
AC power adapter, 3-10  
AC/DC adapter specifications, 2-16  
Power board, 4-12  
required tools, 4-3  
system board, 4-10  
top cover, 4-8  
B
Battery  
removing, 1-8  
VersaGlide, 4-8  
Battery charger specifications, 2-15  
Battery compartment latch, 1-13  
Battery compartment release lock, 1-8  
Battery packs  
Disassembly procedures, 4-4  
Diskette drive  
standard, 1-7  
Diskette drive specifications, 2-13  
handling, 4-2  
Battery specifications, 2-14  
Battery types, 1-8  
BIOS, 3-2  
BIOS informational messages, 5-7  
BIOS Setup utility, 1-14, 3-3  
BIOS upgrade procedure, 1-20  
E
Embedded numeric keyboard, 1-5  
Environmental specifications, 2-21  
EPROM chip, 3-3  
External keyboard, 1-10  
External monitor  
connecting, 1-11  
External VGA, 3-8  
C
CD-ROM reader specifications, 2-14  
Cleaning the notebook  
exterior, 4-1  
F
FastFacts, 5-2  
interior, 4-2  
Features, 1-2  
CMOS battery  
Field service guidelines, 4-1  
Field-replaceable parts list, 4-13  
Floating point unit, 3-3  
Fn keys, 1-5  
discharging, 1-17  
COM 1, 1-12  
Converter board specifications, 2-8  
CPU, 1-2  
Functional block diagram, 3-2  
P54CSLM, 3-3  
removing, 4-7  
H
Hard disk drive compartment, 1-8  
Hard disk drive specifications, 2-14  
Hard disk drives  
D
DC/DC converter specifications, 2-15  
DIMM module, 1-20  
Disassembly  
protecting, 4-2  
Hard disk subsystem, 3-9  
Hardware reset switch, 1-10  
HDD LED, 3-10  
battery pack, 4-4  
CPU, 4-7  
diskette drive, 4-5  
hard disk drive, 4-5  
Hot key descriptions, 2-21  
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Index-2  
PHDisk utility, 1-20  
POST messages, 5-4  
Power board, 3-11  
I
I/O board specifications, 2-10  
I/O subsystem, 3-6  
Power connector, 1-9  
Power management modes, 2-19  
Power specifications, 2-22  
Power subsystem, 3-10  
Power switch, 1-4  
Illustrated Parts Breakdown (IPB), 4-13  
Intel P54CSLM, 3-3  
K
Keyboard, 1-5  
Power-on self test (POST), 1-14  
Preventive maintenance, 4-1  
Printer  
Keyboard controller, 3-8  
Keyboard specifications, 2-16  
connecting, 1-12  
L
Product information  
Using FastFacts, 5-2  
PS/2 mouse, 1-10  
LCD cover switch, 1-4  
LCD inverter board, 3-11  
LCD quality  
maintaining, 4-3  
LED indicator board specifications, 2-9  
LED status indicators, 2-13  
Q
Quick troubleshooting, 5-8  
R
M
Resolution, 3-8  
Memory  
Run-time error messages, 5-8  
DRAM, 3-6  
ROM, 3-6  
S
upgrading, 1-19  
SCANDISK, 4-2  
Separating the system and I/O boards, 4-11  
serial mouse, 1-10  
Serial port, 1-12  
Service information, 5-1  
Setup utility, 1-14  
Memory compartment, 1-7  
Memory compartment cover, 1-13  
Memory configurations, 1-19  
Memory controller, 3-4  
Memory subsystem, 3-6  
Microprocessor, 3-3  
Model configurations, 1-1  
menu, 1-14  
Shock specifications, 2-22  
Specifications  
N
system, 2-1  
NEC service telephone numbers, 5-1  
NiMH battery, 1-8  
Num lock key, 1-5  
Status indicators, 2-13  
Status panel LEDs, 1-4  
Subsystems, 3-1  
System board specifications, 2-7  
System configuration diagram, 1-3  
System features, 1-2  
System logic controller, 3-4  
System processor, 3-3  
System specifications, 2-1  
System upgrades, 1-19  
P
Packaging and documentation  
part numbers, 4-16  
Part numbers, 4-13  
PC card slot  
using, 1-8  
PCMCIA controller, 3-9  
PCMCIA sockets, 3-9  
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Index-3  
T
Technical support  
contacting, 5-1  
Transfer board specifications, 2-8  
Troubleshooting checklist, 5-3  
V
VersaGlide subsystem, 3-10  
VGA extended modes, A-3  
VGA high refresh modes, A-5  
VGA port, 1-11  
VGA standard modes, A-1  
VGA VESA driver diskette, 1-11  
Vibration specifications, 2-22  
Video controller, 3-7  
features, 3-7  
Video modes, A-1  
Y
Y-adapter, 1-10  
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