NEC VERSA 6220 - SERVICE User manual

First Printing — January 1998
Copyright 1998
NEC Computer Systems Division, Packard Bell NEC, Inc.
1414 Massachusetts Avenue
Boxborough, MA 01719
All Rights Reserved
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.
FaxFlash is a service mark of NEC Computer Systems Division (NECCSD), Packard Bell NEC, Inc.
NEC is a registered trademark, Versa is a U.S. registered trademark, MiniDock, VersaBay, VersaGlide, and
PortBar are trademarks, and UltraCare is a U.S. registered service mark of NEC Corporation, used
under license.
All other product, brand, or trade names used in this publication are the property of their respective owners.
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xi
Preface
This service and reference manual contains the technical information necessary to set up and
maintain the NEC Versa®6220/30/60 notebook computers.
The manual also provides hardware and interface information for users who need an over-
view of the system design. The manual is written for NEC-trained customer engineers, sys-
tem analysts, service center personnel, and dealers.
The manual is organized as follows:
Section 1 Technical Information, provides an overview of the hardware and interface
components. System specifications are listed including computer dimensions, weight, envi-
ronment, safety compliance, power consumption, and system memory specifications.
Section 2  Setup and Operation,takes the authorized service technician or dealer from
unpacking to setup and operation. The section includes a description of operating controls,
setting parameters and accessing the NECCSD bulletin board system (BBS).
Section 3  Troubleshooting, lists troubleshooting procedures as well as helpful
servicing hints.
Section 4  Field Service Guidelines,provides disassembly and assembly procedures,
and an exploded-view diagram of the NEC Versa system with part numbers.
Appendix A  Connector Locations and Pin Assignments,provides a list of the main
board internal connector pin assignments and a list of external pin assignments.
Appendix B  Video Modes,lists NEC Versa supported video modes.
An Index is included for convenience.
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xiii
Abbreviations
Aampere
AC alternating current
AT advanced technology
(IBM PC)
BBS Bulletin Board System
BCD binary-coded decimal
BCU BIOS Customized Utility
BIOS basic input/output system
bit binary digit
bpi bits per inch
bps bits per second
BUD BIOS Upgrade Diskette
C Celsius or centigrade
Cache high-speed buffer storage
CAM constantly addressable memory
CAS column address strobe
CD-ROM compact disk ROM
CGA Color Graphics Adapter
CGB Color Graphics Board
CH channel
clk clock
cm centimeter
CMOS complementary metal oxide
semiconductor
COM communication
CONT contrast
CPGA ceramic pin grid array
CPU central processing unit
CRT cathode-ray tube
DAC digital-to-analog converter
DACK DMA acknowledge
DC direct current
DIMM dual-inline memory module
DIP dual in-line package
DLAB Divisor Latch Address bit
DMA direct memory access
DMAC DMA controller
DOS disk operating system
DRAM dynamic RAM
DTE data terminal equipment
ECC error checking and correction
ECP extended capabilities port
EDO enhanced date out
EDS error detecting system
EGA Enhanced Graphics Adapter
EMS Expanded Memory
Specification
EPP enhanced parallel port
EPROM erasable and programmable
ROM
EVGA Enhanced Video Graphics
Array
F Fahrenheit
FAX facsimile transmission
FCC Federal Communications
Commission
FG frame ground
FM frequency modulation
Fn Function
FRU field-replaceable unit
GB gigabyte
GND ground
HDD hard disk drive
HEX hexadecimal
HGA Hercules Graphics Adapter
Hz hertz
IC integrated circuit
ID identification
IDE intelligent device electronics
IDTR interrupt descriptor table
register
IMR Interrupt Mask register
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xiv Abbreviations
in. inch
INTA interrupt acknowledge
IPB illustrated parts breakdown
IR infrared
IRR Interrupt Request register
ISA Industry Standard Architecture
ISR In Service register
I/O input/output
IPC integrated peripheral controller
ips inches per second
IRQ interrupt request
K kilo (1024)
k kilo (1000)
KB kilobyte
kg kilogram
kHz kilohertz
kV kilovolt
lb pound
LBA logical block addressing
LDTR local descriptor table register
LED light-emitting diode
LSB least-significant bit
LSI large-scale integration
Mmega
mA milliamps
max maximum
MB megabyte
MDA Monochrome Display Adapter
MFM modified frequency modulation
Mhz megahertz
mm millimeter
ms millisecond
MSB most-significant bit
NASC National Authorized Service
Center
NC not connected
NDP numeric data processor
NMI Non-maskable Interrupt
ns nanosecond
NSRC National Service Response
Center
PAL programmable array logic
PC personal computer
PCB printed circuit board
PCI peripheral component
interconnect
PFP plastic flat package
PIO Programmed Input/Output
pixel picture element
PJQFP plastic J-lead quad flat pack
PLCC plastic lead chip carrier
PLL phase lock loop
p-p peak-to-peak
PPI programmable peripheral
interface
PROM programmable ROM
QFP quad flat pack
RAM random-access memory
RAMDAC RAM digital-to-analog
RAS row address strobe
RGB red green blue
RGBI red green blue intensity
ROM read-only memory
rpm revolutions per minute
R read
RTC real-time clock
R/W read/write
Sslave
SCSI Small Computer System
Interface
SDLC Synchronous Data Link
Control
SG signal ground
SIMM single inline memory module
SIR serial infrared
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Abbreviations xv
SOIC small outline integrated circuit
SQFP silver quad flat package
SVGA Super Video Graphics Array
SW switch
TCP Thin chip package
TQFP Thin-quad flat package
TSC Technical Support Center
TTL transistor/transistor logic
tpi tracks per inch
UART universal asynchronous
receiver/transmitter
Vvolt
Vdc volts, direct current
VESA Video Electronics Standards
Association
VFO variable frequency oscillator
VGA Video Graphics Array
VLSI very large-scale integration
VRAM virtual RAM
Wwatt
µf microfarad
µPD microprocessor
µs microsecond
Ωohm
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iii
Contents
Preface......................................................................................................................... xi
Abbreviations............................................................................................................... xiii
Section 1 Technical Information
Hardware Overview — Front.......................................................................................1-2
Liquid Crystal Display (LCD)................................................................................1-2
Power Button .......................................................................................................1-3
LCD Status Bar and Power Indicator....................................................................1-4
Status Icons...................................................................................................1-5
Keyboard..............................................................................................................1-6
NEC VersaGlide...................................................................................................1-6
Diskette Drive and the NEC VersaBay II ..............................................................1-7
Infrared (IR) Assembly..........................................................................................1-8
Hardware Overview — Right Side...............................................................................1-8
Hardware Overview — Left Side.................................................................................1-10
Hardware Overview — Rear Side................................................................................1-11
Hardware Overview — Internal Components...............................................................1-12
Battery Pack.........................................................................................................1-12
Hard Disk Drive....................................................................................................1-12
Diskette Drive.......................................................................................................1-12
20X CD-ROM Reader..........................................................................................1-12
CPU Board...........................................................................................................1-12
Sound Board.........................................................................................................1-12
Graph Board.........................................................................................................1-14
I/O Board .............................................................................................................1-14
CMOS Battery......................................................................................................1-15
Bridge Battery......................................................................................................1-15
System Memory...........................................................................................................1-15
Memory Map........................................................................................................1-16
System Video...............................................................................................................1-16
Parallel Interface..........................................................................................................1-17
Serial Interface.............................................................................................................1-17
NEC Versa Chip Set....................................................................................................1-18
Intel Pentium P55CLM Microprocessor................................................................1-18
M-Triton System Controllers ................................................................................1-18
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iv Contents
256K X Flash ROM..............................................................................................1-19
ROM BIOS....................................................................................................1-19
VGA Controller....................................................................................................1-19
Parallel Interface...................................................................................................1-20
Keyboard Controller .............................................................................................1-20
PC CardBus Controller.........................................................................................1-20
Sound Integrated Circuit.......................................................................................1-20
Interrupt Controllers.............................................................................................1-21
Power Management Overview .....................................................................................1-22
System Power Management ..................................................................................1-23
Local Power Management.....................................................................................1-23
Plug and Play...............................................................................................................1-24
Specifications...............................................................................................................1-25
Section 2 Setup and Operation
Unpacking the System..................................................................................................2-1
Hardware Setup...........................................................................................................2-1
Cable Connections................................................................................................2-3
Power Sources.............................................................................................................2-4
Using the AC Adapter...........................................................................................2-4
Using the Main Battery Pack.................................................................................2-5
Checking Battery Power Levels......................................................................2-5
What to Do When Battery Power Gets Low...................................................2-6
Returning the Battery to Full Operation..........................................................2-6
When to Change the Battery..........................................................................2-6
Battery Handling............................................................................................2-6
Replacing the Battery Pack ............................................................................2-7
Battery Precautions........................................................................................2-10
Recharging Battery Precautions......................................................................2-10
NEC VersaBay II Battery and Adapter Kit............................................................2-11
Extending Battery Life..........................................................................................2-11
Using the DC Car Adapter....................................................................................2-11
Operating Controls ......................................................................................................2-12
LCD Status Bar ....................................................................................................2-13
Status Icons...................................................................................................2-13
Function Keys (Fn Keys).......................................................................................2-14
Smart Power Switch .............................................................................................2-14
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Contents v
Setting Switches ...................................................................................................2-15
Updating the System BIOS ............................................................................2-16
Changing Switch Settings...............................................................................2-17
Performing the BIOS Update .........................................................................2-20
Power-on Self-Test (POST).........................................................................................2-21
POST Errors.........................................................................................................2-22
Setup Utility ................................................................................................................2-25
Accessing Setup....................................................................................................2-25
With an Error at POST ..................................................................................2-25
With No Errors at POST................................................................................2-25
Setup Utility Main Menu.......................................................................................2-26
How to Use Setup..........................................................................................2-26
Looking at Screens ........................................................................................2-27
Using Keys.....................................................................................................2-28
Checking/Setting System Parameters..............................................................2-28
BIOS Setup Menus...............................................................................................2-31
Standard CMOS Setup...................................................................................2-31
Advanced CMOS Setup.................................................................................2-32
Power Management Setup..............................................................................2-32
Boot Device Setup ........................................................................................2-34
Peripherals Setup ...........................................................................................2-34
Other BIOS Setup Options.............................................................................2-35
Password Protection ......................................................................................2-35
Using BIOS Setup to Set Power Management.......................................................2-35
Using the Save to File (STF) Feature..............................................................2-36
STF Benefits..................................................................................................2-36
Section 3 Troubleshooting
Quick Trouble Shooting...............................................................................................3-1
Problem Checklist.................................................................................................3-1
Start-up Problems.................................................................................................3-3
POST Error Messages....................................................................................3-4
Helpful Questions ........................................................................................................3-7
Section 4 Field Service Guidelines
Preventive Maintenance ...............................................................................................4-1
Cleaning the Notebook’s Exterior .........................................................................4-1
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vi Contents
Cleaning the Notebook’s Interior ..........................................................................4-2
Protecting the Disk Drives ....................................................................................4-2
Handling the Battery Packs...................................................................................4-3
Maintaining the LCD Quality ................................................................................4-3
Required Tools and Equipment ....................................................................................4-3
Disassembly and Reassembly........................................................................................4-4
Hard Disk Drive....................................................................................................4-5
Diskette Drive.......................................................................................................4-7
Main Battery Pack (Li-Ion Type) ..........................................................................4-8
Removing the Keyboard........................................................................................4-10
Memory Upgrade..................................................................................................4-12
LCD and Top Cover.............................................................................................4-15
VersaGlide............................................................................................................4-18
LCD Status Bar and Power Button .......................................................................4-19
Bridge Battery, CMOS Battery, Buzzer ................................................................4-20
Sound Board and Microphone...............................................................................4-21
IR Assembly and Graph Board..............................................................................4-21
CPU Assembly......................................................................................................4-23
I/O Board .............................................................................................................4-24
Illustrated Parts Breakdown.........................................................................................4-25
Service Information......................................................................................................4-29
Technical Support........................................................................................................4-30
Product Information.....................................................................................................4-30
Ordering Information from FaxFlash............................................................................4-30
Appendix A Connector Locations and Pin Assignments
Appendix B Video Modes
List of Figures
1-1 NEC Versa 6220/30/60 Series Notebook ....................................................... 1-1
1-2 LCD Panel..................................................................................................... 1-3
1-3 LCD Status Bar and Button Locations........................................................... 1-4
1-4 System Status Bar.......................................................................................... 1-5
1-5 Keyboard Layout ........................................................................................... 1-6
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Contents vii
1-6 VersaGlide Location ...................................................................................... 1-7
1-7 NEC VersaBay II Location............................................................................ 1-7
1-8 Right Side Features........................................................................................ 1-8
1-9 Left Side Features.......................................................................................... 1-10
1-10 Rear Features................................................................................................. 1-11
1-11 Sound Board Layout...................................................................................... 1-13
1-12 Graph Board Layout ...................................................................................... 1-14
1-13 I/O Board Layout........................................................................................... 1-14
2-1 Connecting the AC Adapter ........................................................................... 2-1
2-2 Powering on the System................................................................................. 2-2
2-3 Power and I/O Connector Locations .............................................................. 2-3
2-4 NEC Versa AC Adapter................................................................................. 2-4
2-5 Removing the Cover ...................................................................................... 2-8
2-6 Removing the Battery .................................................................................... 2-8
2-7 Inserting the Battery Pack.............................................................................. 2-9
2-8 Replacing the Cover....................................................................................... 2-9
2-9 Connecting the Car DC Adapter..................................................................... 2-11
2-10 Keyboard Panel LEDs and Controls............................................................... 2-12
2-11 Status Bar Location ....................................................................................... 2-13
2-12 Dip Switch Location...................................................................................... 2-15
2-13 Locating the Speaker Cap Screws.................................................................. 2-17
2-14 Removing the Speaker Caps........................................................................... 2-17
2-15 Lifting the Keyboard...................................................................................... 2-18
2-16 Positioning the Keyboard ............................................................................... 2-18
2-17 Dip Switches.................................................................................................. 2-19
2-18 Reassembling the System ............................................................................... 2-20
2-19 Setup Main Menu........................................................................................... 2-26
2-20 Advanced CMOS Setup Menu....................................................................... 2-27
4-1 Removing the Drive Bay Cover...................................................................... 4-5
4-2 Removing the Hard Disk Drive ...................................................................... 4-6
4-3 VersaBay II Release Latches.......................................................................... 4-7
4-4 Removing the Standard Diskette Drive........................................................... 4-8
4-5 Removing the Battery Compartment Cover.................................................... 4-9
4-6 Removing the Battery .................................................................................... 4-9
4-7 Locating the Speaker Cap Screws.................................................................. 4-10
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viii Contents
4-8 Removing the Speaker Caps........................................................................... 4-10
4-9 Lifting up the Keyboard ................................................................................. 4-11
4-10 Positioning the Keyboard ............................................................................... 4-12
4-11 DIMM Features............................................................................................. 4-13
4-12 Installing the DIMM....................................................................................... 4-13
4-13 Removing an Installed DIMM........................................................................ 4-14
4-14 Removing the Bottom Base Screws................................................................ 4-15
4-15 Location of the Three Screws......................................................................... 4-16
4-16 Separating the Top Cover from the Base Unit ................................................ 4-17
4-17 Removing the VersaGlide............................................................................... 4-18
4-18 LCD Status Board ......................................................................................... 4-19
4-19 Removing Bridge Battery, CMOS Battery, and Buzzer .................................. 4-20
4-20 Removing the IR Assembly and Graph Board................................................. 4-22
4-21 Removing the CPU Board from the Graph Board........................................... 4-24
4-22 Removing the I/O Board................................................................................ 4-25
4-23 NEC Versa Model 6220/30/60 Illustrated Parts Breakdown........................... 4-26
A-1 Graph Board Layout ...................................................................................... A-1
A-2 I/O Board Layout........................................................................................... A-2
List of Tables
1-1 Model Configurations .................................................................................... 1-2
1-2 Memory Map................................................................................................. 1-16
1-3 NEC Versa Series Chip Types and Technologies............................................ 1-18
1-4 Interrupt Controllers...................................................................................... 1-21
1-5 Automatic Power-Saving Features ................................................................. 1-22
1-6 Maximum Performance Default Settings......................................................... 1-24
1-7 Specifications................................................................................................. 1-25
2-1 I/O Connector Descriptions............................................................................ 2-3
2-2 Control and Switch Functions ........................................................................ 2-12
2-3 Fn Key Operations......................................................................................... 2-14
2-4 POST Error Messages.................................................................................... 2-22
2-5 Beep Codes.................................................................................................... 2-24
2-6 Setup Key Functions...................................................................................... 2-28
2-7 Setup Parameters........................................................................................... 2-29
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Contents ix
3-1 Troubleshooting............................................................................................. 3-2
3-2 POST Error Messages.................................................................................... 3-4
3-3 Beep Codes.................................................................................................... 3-6
4-1 NEC Versa 6220/30/60 Disassembly Sequence .............................................. 4-4
4-2 System RAM Expansion ................................................................................ 4-12
4-3 NEC Versa 6220/30/60 Field-Replaceable Parts............................................. 4-27
4-4 NEC Service and Information Telephone Numbers......................................... 4-29
A-1 Graph Board Connectors................................................................................ A-2
A-2 I/O Board Connectors.................................................................................... A-3
A-3 Keyboard/Mouse Connectors......................................................................... A-3
A-4 Serial Port Connector Pin Assignments .......................................................... A-3
A-5 CRT Connector Pin Assignments................................................................... A-4
A-6 Parallel Printer Pin Assignments..................................................................... A-4
A-7 Power Connector........................................................................................... A-5
A-8 Hard Disk Drive Connector............................................................................ A-5
B-1 LCD Display Mode Setting (1024x768 TFT Color LCD and
Simultaneous CRT Display) Standard Video Mode .................................... B-1
B-2 Frequency Table of Standard Video Mode ..................................................... B-2
B-3 Expanded Video Mode................................................................................... B-2
B-4 Frequency Table of Extended Video Mode..................................................... B-3
B-5 CRT Display Mode Setting (CRT-only Display)............................................. B-3
B-6 Extended Video Mode ................................................................................... B-4
B-7 Panning Video Mode for (1024x768 TFT Color LCD and
Simultaneous CRT Display)....................................................................... B-5
B-8 NTSC/PAL TV Display Mode ....................................................................... B-5
B-9 Panning NTSC/PAL TV Mode....................................................................... B-5
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Section 1
Technical Information
The NEC Versa 6220/30/60 notebook computer is lightweight, compact, and fully IBM
compatible.
NOTE
This service manual covers only the NEC
Versa 6220/30/60 notebooks. All figures in this
manual reflect this series of notebooks.
Figure 1-1 NEC Versa 6220/30/60 Series Notebook
This section of the manual provides system configuration information, including an over-
view of hardware and interface components. See the following table for a system-specific
breakdown of the hardware.
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1-2 Technical Information
Table 1-1 Model Configurations
Feature NEC Versa 6220 NEC Versa 6230 NEC Versa 6260
CPU Intel Pentium® with
MMX technology
P55CLM/200 MHz
Intel Pentium® with
MMX technology
P55CLM/233 MHz
Intel Pentium® with
MMX technology
P55CLM/266 MHz
On-Board DRAM 32-MB 32-MB 32-MB
Video Memory 2-MB 2-MB 2-MB
Hard Disk Drive 3.0 GB 12.5 mm high 5.4 GB 17mm high 5.4 GB 17mm high
CD-ROM Reader 20X CD-ROM Reader 20X CD-ROM Reader 20X CD-ROM Reader
Color LCD 13.3” Extended
Graphics Array
(XGA),TFT Color
Display
13.3” Extended
Graphics Array
(XGA),TFT Color
Display
13.3” Extended
Graphics Array
(XGA),TFT Color
Display
HARDWARE OVERVIEW—FRONT
Take a moment to become familiar with the location and function of controls located on the
front of the system.
Liquid Crystal Display (LCD)
The LCD operates with the NeoMagic NMG4 controller. The controller supports XGA,
uses a 64-bit accelerator with a Peripheral Component Interconnect (PCI) interface. The
LCD also supports VESA timing.
The NEC Versa 6220/30/60 LCD features the following:
 13.3-inch Extended Graphics Array (XGA) TFT high-resolution active matrix
XGA color display
 0.264 mm dot pitch
 18-bit digital interface
 1024 x 768 resolution
 64K colors.
Additional LCD panel features:
 Power LED that indicates the current power status. This LED is visible with the
LCD panel opened or closed.
 Slide switch that adjusts screen brightness.
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Technical Information 1-3
Figure 1-2 LCD Panel
Another video feature includes a CRT port on the system's rear panel that allows the user to
connect an optional monochrome or color external display to the system. The computer can
support the LCD and external display simultaneously.
Power-saving features for controlling the LCD's backlighting include the ROM-based hot
key combination Fn F5, and Auto Setup power management settings. See Section 2, Setup
and Operation, for information on using these settings. In addition, the automatic LCD
status feature conserves the backlight. When the LCD is closed the backlight shuts off
automatically, saving battery power.
Power Button
Slide the Power button to the right to power on and power off the computer. The Power
button is a “smart” switch, meaning that it recognizes when the system is in Suspend mode.
If in Suspend mode, you cannot power off until you press the Suspend button again to bring
the system out of Suspend mode.
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1-4 Technical Information
Figure 1-3 LCD Status Bar and Button Locations
LCD Status Bar and Power Indicator
The LCD status bar is situated right below the LCD screen. It provides an easy way to de-
tect system status. Different graphic icons appear on the LCD bar indicating that a device is
accessed, an operation performed, or a power mode activated. The graphic icons displayed
on the LCD bar resemble either their physical characteristics or their primary function. See
the LCD Status Bar figure shown next, and the descriptions that follow for the specific
meaning of each icon.
The power indicator is located just above and to the left of the status bar. The power indi-
cator lights green when computer power is on.
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Technical Information 1-5
Figure 1-4 System Status Bar
Status Icons
The following list defines the status icons displayed in the system status bar.

Suspend — appears when the system is in Suspend mode. Suspend mode con-
serves system power by shutting down devices in the system while retaining data
and system status.

Power Management — shows the current power management mode in use, in-
cluding Off, Custom, High Performance or Longest Life.

Diskette Drive — appears when the NEC Versa writes data to or retrieves data
from a diskette.

Hard Disk — shows when the NEC Versa writes data to or retrieves data from
the hard disk.

Caps Lock — appears when Caps Lock is in effect.

Scroll Lock — shows that Scroll Lock is in effect.

Num Lock — appears when Num Lock is in effect. Num Lock lets the user enter
numbers for calculations via the numeric keypad.

Battery Status — displays the percentage of battery power available.
Battery 1 appears when you have the main battery installed in the battery bay.
Battery 2 appears when you have an optional battery installed in the
VersaBay II.
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1-6 Technical Information
Keyboard
The built-in, 85-key keyboard (U.S.) or 79-key keyboard (UK and Germany) uses the stan-
dard QWERTY format. The keyboard provides 12 function keys and 7 cursor control keys,
with an Fn key for ROM-based key functions. The numeric keypad is embedded in the stan-
dard key layout.
Figure 1-5 Keyboard Layout
NEC VersaGlide
The NEC VersaGlide is a built-in mechanism that functions as the system’s mouse. It con-
trols the on-screen pointer (cursor). To use the VersaGlide, move your finger across the
NEC VersaGlide pad, and the cursor follows. The buttons below the NEC VersaGlide al-
low the user to select or deselect menu items. Tap and double-tap are supported on the
VersaGlide pad.
The PS/2 Microsoft mouse is the system’s default pointing device until the user selects the
NEC Setup icon. When the user selects the NEC Setup icon, the NEC VersaGlide is
installed as the system pointing device. If an external mouse is installed, the NEC
VersaGlide is deactivated. A serial mouse is not supported.
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Technical Information 1-7
Figure 1-6 VersaGlide Location
Diskette Drive and the NEC VersaBay II
A standard 1.44-MB diskette drive or SuperDisk LS-120 drive comes installed in the Ver-
saBay II slot on the front of the computer. The VersaBay II expansion slot lets the user re-
place the standard diskette drive with the 20X CD-ROM reader that also ships with the
system. In addition to the CD-ROM reader, the VersaBay II accepts NEC options including
a second battery pack, or an additional hard disk.
Figure 1-7 NEC VersaBay II Location
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1-8 Technical Information
Infrared (IR) Assembly
The IR assembly consists of a small board with two infrared LEDs, connected to the Graph
board at connector P10. The board allows the NEC Versa computer to communicate with
other infrared-ready computers. For example, the infrared port allows the user to transfer
files between the NEC Versa and an IR-equipped computer, or print to an IR-equipped
printer without using cables.
HARDWARE OVERVIEW—RIGHT SIDE
Review the following section for a description of the hardware on the right side of the NEC
Versa.
Figure 1-8 Right Side Features

Kensington Lock — Gives the user the option to add an optional Kensington
Lock.

Hard Disk Drive Bay Cover Release Latch — The hard disk drive bay contains
the removable hard disk drive.
To access the hard disk drive, power off the system, turn the system over, remove
the hard disk drive bay cover screw and lift up the hard disk drive bay cover re-
lease latch while pushing the cover away from the system.
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