NCD Explora 450, Explora 400, Explora 451, Explora 453, Explora 454 Installing Instructions

Installing Your Explora 400/450 Network Computer

Part Number 9300586 Rev. A
October, 1997

Network Computing Devices, Inc.
350 North Bernardo Avenue
Mountain View, California 94043
Email: [e-mail]

Copyright

Copyright © 1997 by Network Computing Devices, Inc. The information contained in this document is
subject to change without notice. Network Computing Devices, Inc. shall not be liable for errors con­tained herein or for incidental or consequential damages in connection with the furnishing, performance,
or use of this material. This document contains information which is protected by copyright. All rights
are reserved. No part of this document may be photocopied, reproduced, or translated to another lan­guage without the prior written consent of Network Computing Devices, Inc.

Trademarks

Explora, Explora Pro, ECX, HMX, HMXpro, HMXpro24, WinCenter, WinCenter Pro, WinCenter Connect,
NCDnet, and NCDware are trademarks of Network Computing Devices, Inc. XRemote is a registered
trademark of Network Computing Devices, Inc.

All trademarks and service marks are the trademarks and service marks of their respective companies.

All terms mentioned in this book that are known to be trademarks or service marks have been appropri­ately capitalized. NCD cannot attest to the accuracy of this information. Use of a term in this book should
not be regarded as affecting the validity of any trademark or service mark.

Revisions

Revision history of this document:

Part Number Revision Date Description

9300586 Rev. A October, 1997 First release of this manual for Explora 400/450

Warnings and Certifications

This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.

You are cautioned that any changes or modifications not expressly approved in this manual could void
your authority to operate this equipment.

This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment
Regulations.

Cet appareil numérique de la Classe A respecte toutes les exigences du Règlement sur le matériel
brouilleur du Canada.

Declaration of Conformity

Manufacturer’s Name: Network Computing Devices, Inc.
Manufacturer’s Address: 350 N. Bernardo Ave., Mountain View, CA 94043
Type of Equipment: X-Terminal
Model No.: Xplora and Xplorapro family of bases
Application of Council Directives: 89/336/EEC, 73/23/EEC
Standards to which Conformity is Declared: EN 55022, EN 50082-1, EN 60950
Importer’s Name: Network Computing Devices (France) SARL
Importer’s Address: 5, bis rue de Petit-Robinson, 78353 Jouy-en-Josas cedex, France

We hereby declare the equipment specified above conforms to the above Directives and Standards.

___________________________________________________________

Jean-Claude Vau, Director, Strategic Sales Manager,

NCD

(France)

SARL

, August, 1997

Guidelines for Productive and Healthy Use of Your Network Computer

You might have read or heard of articles that linked prolonged viewing of computer video displays with
eye fatigue, and prolonged use of computer keyboards and mouse devices with repetitive stress injuries
such as carpal tunnel syndrome. One common example is the syndrome known as “tennis elbow.”
Although a conclusive direct causal relationship between computer use and these adverse health effects
has yet to be scientifically proven, NCD recommends that you read and follow these guidelines in setting
up and using your new NCD network computer.

• Set up your network computer in a well lit, glare and shadow-free environment.

• Do not use your network computer in a position you find awkward or unnatural.

• Use a chair that provides good lower back support. Adjust your chair so that your feet rest flat on the

floor with your thighs in a horizontal position.

• Place your keyboard on a surface so that your wrists are not tilted, or only slightly tilted, while using
the keyboard. Many people find a comfortable keyboard height is at the same level as their elbows.

• If the height of your work surface cannot be adjusted, position the chair at a comfortable height and
use a footrest to place your feet on a level surface.

• Place your mouse on a surface that is at the same height as your keyboard. Many people find using the
mouse and keyboard within 16 inches (0.4 m) of the body is comfortable.

• Avoid resting your arm on your work surface and merely bending your wrist when using your
mouse. Consider using a wrist rest to provide a padded surface for your wrists when working with
your mouse.

• Place your display monitor at a comfortable viewing distance. Many people favor a distance of 16 to
28 inches (0.4 to 0.7 m) from their eyes. Position the screen so that you are not looking up or down at it.

• Take breaks to rest your eyes, stretch your muscles, and move around.

• Vary your work patterns so that you alternate working at your computer with other tasks that use

different muscle groups and allow you to focus your eyes at different distances.

• See your physician if you experience persistent muscle ache, joint pain, eye fatigue or other discomfort
when using your network computer.

These are guidelines. What is comfortable for some might not be comfortable for you. You are the only
one who can decide if these guidelines are appropriate for your needs.

What about electromagnetic emissions from your monitor?

Many objects we encounter in our everyday lives produce very low frequency (VLF) and extremely low
frequency (ELF) electromagnetic emissions. These objects include such common appliances as portable
cellular telephones, televisions, toasters, electric blankets, and video display terminals (VDT) such as the
monitor that is part of your network computer. VDTs have been the focus of a growing controversy over
the potential health effect of VLF and ELF emissions.

NCD is monitoring this issue and shares the public’s concern over the potential health consequences of
exposure to VLF and ELF emissions from VDTs. To date, the research and testing on this subject is
inconclusive. Moreover, the link, if any, between VDT emissions and adverse health effects is unproven
and the subject of much debate. Stress, postural strain, and poor working conditions are frequently cited
in addition to, or instead of, VDT emissions as posing potential health hazards to frequent users of VDTs.

The prevailing professional opinion to date is that VDTs are safe. NCD products comply with the
applicable regulations and standards for electromagnetic radiation set forth by the U.S. Code of Federal
Regulations, Underwriters Laboratories, Inc., the Canadian Standards Association, and the German VDE
Standard. When and if new or additional standards are adopted, NCD will take appropriate steps to
comply with them.

Even though the preponderance of professional opinion is that VDTs are safe, some of our customers
have asked us for information on how to reduce their exposure to VLF and ELF emissions. Although
NCD does not endorse the following as having health benefits, the easiest and perhaps most economical
and effective measures are to turn off your display when not in use, to position your display at arm’s
length, and to avoid working in areas where you are positioned close to the rear of a VDT (where the
emissions are strongest). Also, shields are available from third party vendors that reduce glare and
electric emissions.

Contents

Chapter 1

Chapter 2

Chapter 3

Connectors 3-2

Power Connections 3-5

Controls and Indicators 3-7

Chapter 4

Chapter 5

About the Explora 400/450 Series

Explora 400/450 Series Product Line

Basic Installation

Power Connections for Inside the USA 3-5

Power Connections for Outside the USA 3-6

Power Cord for the UK 3-7

Selecting Screen Resolution

Installing Optional Equipment in the

Space-Saver Base

Installing Additional Memory 5-1

Disassembling the Space-Saver Base 5-4

Installing SIMMs 5-5

Removing SIMMs 5-7

Reassembling the Space-Saver Base 5-8

Testing Memory 5-10

Installing PCMCIA Cards 5-11

Installing the Power Y-Cable 5-13

vii

Contents

Installing the Security Device and Mounting Bracket 5-13

Chapter 6

Installing Optional Equipment in the

Monitor Support Base

Installing Additional Memory 6-1

Disassembling the Monitor Support Base 6-4

Installing SIMMs 6-6

Removing SIMMs 6-9

Reassembling the Monitor Support Base 6-10

Testing Memory 6-11

Installing PCMCIA Cards 6-12

Installing the Power Y-Cable 6-14

Chapter 7

Chapter 8

Isolating Faulty Components 8-1

Mouse Troubleshooting 8-1

Monitor Troubleshooting 8-2

Base Troubleshooting 8-2

Specifications

Troubleshooting

viii

In Case of Trouble 8-2

Returning Components 8-3

Ethernet Address of Replacement Bases 8-3

Comments on the Booklet 8-3

1 About the Explora 400/450 Series

The Explora 400/450 Series network computers (
board in one of two bases, a monitor, a mouse, and a keyboard. You can
purchase the

The two bases are:

The space-saver base, shown in Figure 1-2, has an ergonomic design with

❏

as small a footprint as possible, making it ideal for environments where
space is at a premium.

alone or with a monitor.

NC

) consist of a circuit

NCs

Figure 1-1 Explora 400/450 Series Space-Saver Base in its Stand

About the Explora 400/450 Series

1-1

The monitor support base, shown in Figure 1-2, supports the weight of a

❏

color monitor.

Figure 1-2 Explora 400/450 Series Monitor Support Base

The Explora 400/450
following features:

❏

VGA/SVGA/XGA/SXGA

/2 mouse support

❏

PS

Multiple keyboard choices

❏

Serial (

❏

Parallel port

❏

Externally accessible

❏

Audio output (except on the Explora 450 with the optional thin coax

❏

RS-232 C

Ethernet connection)

ENERGY STAR

❏

1-2

About the Explora 400/450 Series

s are advanced network computers that include the

NC

monitor support

) port

PCMCIA

card (also called PC card) slot

compliance for energy efficiency

Table 1-1 compares the features of the Explora 400 to the Explora 450 features.

Table 1-1 Feature Comparison

Feature Explora 400 Explora 450

CPU PowerPC 403GA, 33 MHz PowerPC 403GCX, 66 MHz

Memory 8 MB standard, 128 MB

maximum, fast-page mode

Graphics S3 TRIO64V2/DX, 1 MB EDO

DRAM, used as a frame buffer,
1152x900 maximum

Networking Twisted-pair 10BaseT Ethernet Twisted-pair 10/100BaseTX

Note

The label on the underside of the space-saver base shows the

8 MB standard, 128 MB
maximum, EDO-mode

S3 TRIO64V2/DX, 2 MB EDO
DRAM, used as a frame buffer,
1280x1024 maximum

Ethernet standard and optional
thin coax Ethernet in place of
audio output

following:

Explora 400 as the Model 401

❏

Explora 450 with stereo audio output as the Model 451

❏

Explora 450 with the optional thin coax Ethernet in place of

❏

the stereo audio output as the Model 453

The label on the underside of the monitor support base shows
the following:

Explora 400 as the Model 402

❏

Explora 450 with stereo audio output as the Model 452

❏

Explora 450 with the optional thin coax Ethernet in place of

❏

the stereo audio output as the Model 454

As an

ENERGY STAR

Partner, Network Computing Devices, Inc. has determined

that this product meets the

ENERGY STAR

guidelines for energy efficiency.

About the Explora 400/450 Series

1-3

Table 1-2 lists the physical dimensions of both bases.

Table 1-2 Explora 400/450 Dimensions

Dimension Space-Saver Base Space-Saver Base in Stand Monitor Support Base

Height 1.9 inches (4.8 cm) 9.6 inches (24.4 cm) 2.1 inches (5.3 cm)

Width 7.6 inches (19.3 cm) 5.5 inches (13.9 cm) 12.8 inches (32.5 cm)

Depth 11.3 inches (28.7 cm) 11.3 inches (28.7 cm) 13.2 inches (33.5 cm)

Weight 2.6 pounds (1.2 kg) 2.8 pounds (1.3 kg) 5.5 pounds (2.5 kg)

1-4

About the Explora 400/450 Series

2 Explora 400/450 Series Product Line

Figure 2-1 shows both Explora 400/450
including options.

Space-saver base
(shown in its stand)

Monitor support base

s and all its components,

base

Monitor and video cable

Power supplies and line cords

PCMCIA

Keyboard

PS/2 mouse

The space-saver base also has an option consisting
of a security device and a wall mounting bracket.

PCMCIA card
(optional)

Memory SIMM
(optional)

Figure 2-1 Explora 400/450 Series Components

Unpack the shipping cartons and make sure you have all of the standard
components and any optional components that you ordered. If any
components are missing or appear damaged, contact

at [phone] or

NCD

your representative immediately.

Explora 400/450 Series Product Line

2-1

2-2

Explora 400/450 Series Product Line

3 Basic Installation

This section describes the location of Explora 400/450 connectors, controls,
and indicators, and illustrates the installation of the base.

To prevent electric shock or fire hazard, do not expose the power supply,
NC, monitor line cord, or monitor to rain or moisture.

Do not set the monitor on the space-saver base. The space-saver base is not
designed to support the weight of a monitor.

Use the NC only in an office or business environment. Do not subject the NC to
vibration, dust, or corrosive gases because the NC is not designed to be used in
such environments.

Warning

Caution

Keep the NC in a well-ventilated area. Do not cover the NC or place anything
against the ventilation holes. Ventilation holes are on the cover to prevent the
internal temperature from rising. Do not allow anything to fall in the ventilation
holes.

Keep the NC away from heat sources, including direct sunshine or heating
appliances. The maximum operating temperature is 40°C (104°F).

Basic Installation

3-1

Connectors

Connectors

Before connecting any cables, make sure the power is off.

Do not connect any power cords to the Explora 400/450 unless the monitor,
keyboard, and mouse are properly connected.

If you are installing additional memory in your NC, do not complete the basic
installation until you have installed the memory. Go to “Installing Optional
Equipment in the Space-Saver Base” on page 5-1 or “Installing Optional
Equipment in the Monitor Support Base” on page 6-1.

With one exception, the connectors are the same for the Explora 400 and
Explora 450:

❏

❏

Figure 3-1 on page 3-3 shows how to connect components to the space-saver
base connectors. Figure 3-2 on page 3-4 shows how to connect components to
the monitor support base connectors.

Caution

Explora 400 always has a stereo audio output connector.

Explora 450 has the stereo audio output connector as standard. You can
order the Explora 450 with an optional thin coax Ethernet connector in
place of the stereo audio output connector.

3-2

Basic Installation

Connect the following to the

Keyboard

❏

Mouse

❏

Monitor

❏

Network

❏

Audio, if used

❏

Serial and/or parallel devices, if used

❏

NC

:

To connect the power supply, follow the instructions in “Power Connections”
on page 3-5.

Connectors

Explora 450 optional thin Ethernet
BNC connector replaces stereo
audio output. If you have this

D

E

T

IS

W

T

option, make only one network
connection at a time. If you have
connections to both the twisted­pair and the thin Ethernet, the
twisted-pair has priority, if active.

Twisted-p air network
connection

e

s

u

o

M

d

r

a

o

b

y

e

K

L

E

L

L

A

R

A

P

Power supply—make this connection
last. If you are using the stand, the NC
must be placed in the stand before
making this connection.

Figure 3-1 Explora 400/450 Connectors (Space-Saver Base)

D

E

T

IS

W

T

L

IA

R

E

S

Stereo audio
output (if used)

Serial
(if used)

Parallel
(if used)

Monitor

Basic Installation

3-3

Connectors

Explora 450 optional thin Ethernet
BNC connector replaces stereo
audio output. If you have this
option, make only one network
connection at a time. If you have
connections to both the twisted­pair and the thin Ethernet, the
twisted-pair has priority, if active.

e

s

u

o

M

d

r

a

o

b

y

e

K

p

u

s

r

e

n

w

n

o

o

P

c

s

i

h

t

e

k

a

m

.

t

—

s

y

l

a

l

p

n

o

i

t

c

e

Monitor

Figure 3-2 Explora 400/450 Connectors (Monitor Support Base)

3-4

Basic Installation

Parallel
(if used)

Serial
(if used)

Stereo audio
output (if used)

Twisted- pair networ k
connection

Power Connections

Carefully observe these power connection instructions. Failure to follow
these instructions can cause fire or electric shock hazard.

Make sure that all other connectors are in place before making the power
connections.

If you are using the space-saver base in its stand, place the base in the stand
before making the power connection. The stand has two supports, one
support has a large hole in it while the other support has a small hole. Orient
the stand so that the support with the large hole aligns with the power
connector.

Power Connections

Warning

Power Connections for Inside the USA

There are three different sets of power components available if you ordered
your

1. A 115-volt power transformer for the

for use inside the

NC

USA:

outlet and a 115-volt line cord for the monitor. (See Figure 3-4.)

115-volt transformer for the NC 115-volt line cord for the monitor

Figure 3-3 Wall-Plug Transformer and Line Cord

that plugs directly into the wall

NC

Basic Installation

3-5

Power Connections

2. A 115-volt power transformer that requires a line cord and two 115-volt
line cords, one line cord for the power transformer and one for the
monitor. (See Figure 3-4.)

To NC

Line cord (115-volt shown)

Power transformer (varies with voltage)

Figure 3-4 Transformer and Line Cord

The line cords are

Listed and

UL

CSA

amps, 125 volts, which consists of minimum
conductor cordage maximum 15 feet in length, terminating in a

plug

15P

.

3. An optional Y-cable. If you have this option, see either “Installing Optional
Equipment in the Space-Saver Base” on page 5-1 or “Installing Optional
Equipment in the Monitor Support Base” on page 6-1.

Power Connections for Outside the USA

If you ordered your
optional Y-cable with a power transformer and one line cord or the following
items: power transformer that requires a line cord for your voltage and two
line cords. (See Figure 3-4.)

The line cords are rated minimum 10 amps, 250 volts, with the appropriate
safety approvals for the country in which the equipment will be installed. The
cordage should be marked
attachment plug. If you are in the UK, see “Power Cord for the UK” on page 3-

7.”

If you have the optional Y-cable, see either “Installing Optional Equipment in
the Space-Saver Base” on page 5-1 or “Installing Optional Equipment in the
Monitor Support Base” on page 6-1.

for use outside the

NC

<HAR>

and terminate in a grounding type

Certified cord sets rated minimum 7

18 AWG

, you received either the

USA

type

,

SVT

or

three

SJT

,

NEMA 5-

3-6

Basic Installation

Power Cord for the UK

The detachable mains lead on this equipment is supplied with a moulded
plug incorporating a fuse, the value of which is indicated on the pin face of
the plug. Should the fuse need to be replaced, an
1362 fuse must be used of the same rating. The fuse cover is detachable. Never
use the plug with the cover omitted.

Controls and Indicators

The controls and indicators are the same for the Explora 400 and Explora 450.
They are shown in Figure 3-5 and Figure 3-5 on page 3-7.

Front view

Controls and Indicators

ASTA

or

approved BS

BSI

Network activity indicator

Back view (Explora 450 with optional thin coax connector)

VIDEO PARALLEL SERIAL TWISTED

Twisted-pair link look-through hole

Figure 3-5 Explora 400/450 Controls and Indicators (Space-Saver Base)

Power indica tor

Power s witch

Basic Installation

3-7

Controls and Indicators

Front view

Back view (Explora 400 or Explora 450
with standard audio connector

Network
activity
indicator

Power
indicator

Power
switch

Twisted-pair link look-through hole

Figure 3-6 Explora 400/450 Controls and Indicators (Monitor Support Base)

3-8

Basic Installation

4 Selecting Screen Resolution

If your monitor complies with automatic detection (

or display data

DDC

channel), your monitor automatically uses the highest resolution and refresh
rate that fits in the available frame buffer. If you want to select another
resolution or refresh rate, use these instructions.

If your monitor does not comply with automatic detection, when you first
turn the

on, the display uses a default resolution that

NC

depends on the
installed video cable and monitor capabilities. Your monitor might not
support this setting or this setting might not provide the highest resolution
and refresh rate that your monitor supports. Refer to your monitor
documentation for its supported resolutions.

The Boot Monitor provides a menu that selects the correct resolution and
changes the dpi (dots per inch) setting for the monitor.

Caution

If you are using third-party monitors, you might damage your monitor by selecting
the wrong screen resolution. Make sure your monitor supports your selection.

If you are using NCD monitors, you will get a blank screen if you select a screen
resolution that is outside the range of your monitor.

To change the resolution:

1. Turn on the system or reboot (if the system is already on).

2. After the Boot Monitor title and version number, messages similar to the

following appear. Press the Escape key to interrupt the booting process
and access the Boot Monitor prompt (>).

Searching for IP address...
Using IP address
Searching for subnet mask
Using subnet mask

...........................

>

IP address of terminal

subnet mask

(Press Escape to interrupt booting.)

Selecting Screen Resolution

4-1

3. When you are in the Boot Monitor (> prompt), press the Setup key or type

se <CR>

Help

Figure 4-1 Boot Monitor Main Menu

. The Main menu appears. (See Figure 4-1.)

Keyboard Monitor Network Boot Done

Help

Use the arrow keys to navigate through the menus
listed across the top of the screen:

Left, Right Go to previous or next menus.
Up, Down Go to previous or next field

within the current menu.
Control-U Delete to beginninbg of line.
Escape Restore previous value.

Help for each field within a menu is shown along the
bottom of the screen.

Exit via the Done menu at the right of the screen.

4. Use the right arrow key to select

Monitor

. The screen now displays the
available monitor resolution settings. (See Figure 4-2 for the Explora 400 or
Figure 4-3 on page 4-3 for the Explora 450.)

Help

Keyboard Monitor

Monitor Resolution

Automatic Detection (DDC)
640 x 480 60Hz
640 x 480 72Hz
640 x 480 75Hz
640 x 480 85 Hz
800 x 600 60Hz
800 x 600 72Hz
800 x 600 75Hz
800 x 600 85Hz
1024 x 768 60Hz
1024 x 768 70Hz
1024 x 768 75Hz
1024 x 768 85Hz
1152 X 900 66Hz
1152 X 900 76Hz

Press Shift-T to test new monitor parameters, Esc to stop test

Figure 4-2 Supported Resolutions for Explora 400

Network Boot Done

Dots Per Inch

XX

4-2

Selecting Screen Resolution

Help

Keyboard Monitor

Network Boot Done

Monitor Resolution

Automatic Detection (DDC)
640 x 480 60Hz
640 x 480 72Hz
640 x 480 75Hz
640 x 480 85 Hz
800 x 600 60Hz
800 x 600 72Hz
800 x 600 75Hz
800 x 600 85Hz
1024 x 768 60Hz
1024 x 768 70Hz
1024 x 768 75Hz
1024 x 768 85Hz
1152 x 900 66Hz
1152 x 900 76Hz
1280 x 1024 60Hz
1280 x 1024 70Hz
1280 x 1024 75Hz
1280 x 1024 85Hz

Press Shift-T to rest new monitor parameters, Esc to stop test

Dots Per Inch

XX

Figure 4-3 Supported Resolutions for Explora 450

5. Press the up or down arrow keys to select the correct setting for your
monitor.

6. Press the right arrow key to select

Dots Per Inch

.

7. Enter the numerical value that matches the resolution you have selected or
leave the default value.

8. To test the selected refresh rate, press Shift-T. Running this test generates a
cross-hatch test pattern. If the refresh rate you select is not supported by
the monitor, the test pattern will either not appear or not be stable.

9. Press any key to return to the Boot Monitor Main menu.

Selecting Screen Resolution

4-3

10. Press the right arrow key to select

. The menu shown in Figure 4-4

Done

appears.

Help

Keyboard Monitor Network Boot Done

Done

Reboot

Exit

Undo

Save Parameters and reboot. Press <Return> to confirm

Figure 4-4 Boot Monitor Done Menu

11. Use the up or down arrow keys to select one of the options from the

Done

menu.

Reboot

Exit

Undo

— saves the settings you changed and reboots the system.

— saves the settings and returns you to the Boot Monitor.

— reloads the parameters that were in effect when you entered the

menus. The system continues to display the menus.

12. Press the Return key.

If you save your selection, you do not need to repeat this procedure unless
you change to a different type or size of monitor.

4-4

Selecting Screen Resolution

Installing Additional Memory

5 Installing Optional Equipment in the

Space-Saver Base

This section describes the installation of the Explora 400/450’s optional
equipment for the space-saver base. If you have the monitor support base, see
“Installing Optional Equipment in the Monitor Support Base” on page 6-1.
The optional equipment is shown in Figure 5-1.

PCMCIA

PCMCIA card Memory SIMM

Figure 5-1 Optional Equipment

Power Y-c abl e

If you are installing additional memory, do so before doing Section 3, “Basic
Installation,” on page 3-1.

Installing Additional Memory

You can add memory to your NC at any time. You may purchase it from
or other vendors. Only
warranty. Contact
vendors.

In the standard configuration, Explora 400 has 8
memory and the Explora 450 has 8 MB of
Adding more memory does not improve

SIMMs

Technical Support for information about approved

NCD

supplied by

NC

The space-saver base also has an
option consisting of a security device,
a wall mounting bracket and an
installation instruction sheet.

are covered under

NCD

of fast-page mode

MB

(extended data out) memory.

EDO

speed.

NCD

NCD

’s

Installing Optional Equipment in the Space-Saver Base

5-1

Installing Additional Memory

Each application running on your NC and each open window requires
memory. If the sum of all memory needed exceeds the installed memory, you
get a message to close windows. To avoid this message, add memory to your

.

NC

Both the Explora 400 and Explora 450 have two

slots. See Table 5-1 for

SIMM

the allowable configuration of the two slots and Table 5-2 on page 5-3 for a list
of

specifications.

SIMM

The following rules apply:

It makes no difference which slot is used as the first slot and which is used

❏

as the second.

For the Explora 400 only, you can intermix fast-page mode and

❏

s. You will always get fast-page mode performance.

SIMM

For the Explora 450 only, you

❏

Table 5-1 Memory Configurations

Total M e m ory
(MB)

4 2218 162

4 4020 164

5 4124 168

6 4232 1616

8 4432 320

First
Slot (MB)

Second
Slot (MB)

must

install

EDO SIMM

Total M e m ory
(MB)

s.

First
Slot (MB)

EDO

Second
Slot (MB)

8 8033 321

9 8134 322

10 8236 324

12 8440 328

16 8848 3216

16 16 0 64 32 32

17 16 1

5-2

Installing Optional Equipment in the Space-Saver Base

Installing Additional Memory

Table 5-2 SIMM Specifications

Speed Fast-page mode (Explora 400) or EDO (Explora 450). 60

nanoseconds (ns) or faster. (Lower ns ratings are faster.) 72-pin.

Profile Low profile (maximum 1.1 inches (28 mm) tall). Use tin-plated

SIMM contacts.

Thickness Board thickness of 0.047 inches to 0.054 inches (0.050 inches

(1.27 mm) nominal). Installing SIMMs that are out of
specifications might damage the SIMM slot or cause the NC to
behave erratically.

Size 32-bits wide.

1 MB (256Kx32 SIMM)
2 MB (512Kx32 SIMM)
4 MB (1Mx32 SIMM)
8 MB (2Mx32 SIMM)
16 MB (4Mx32 SIMM)
32 MB (8Mx32 SIMM)

Caution

If you do not feel confident performing the following procedure on your NC, send
the NC to a qualified service center.

Installing additional memory is a four-step procedure described in detail on
the following pages:

1. Disassemble the
5-4.

2. Install the

SIMM

3. Reassemble the

8.

4. Test the memory after your
on page 5-10.

The only tool you need is a small flat-blade screwdriver.

. See “Disassembling the Space-Saver Base” on page

NC

(s). See “Installing SIMMs” on page 5-5.

. See “Reassembling the Space-Saver Base” on page 5-

NC

is up and running. See “Tes tin g Me mo ry”

NC

Installing Optional Equipment in the Space-Saver Base

5-3

Installing Additional Memory

Disassembling the Space-Saver Base

To disassemble the space-saver base, follow these steps:

1. Remove all cables connected to the

2. If you are using the stand, remove the

3. Place the

on a flat surface (preferably, on an anti-static mat) with the

NC

NC

.

from the stand.

NC

top facing up, as shown in Figure 5-2. As you face the NC, the three
connectors are on your right.

4. Use a small flat-blade screwdriver to press on the tab located near the back
of the

on the connector-side. At the same time, gently pull the NC’s top

NC

section up.

Figure 5-2 Pressing the Tabs

5. Repeat step 4 for the tab on the opposite side of the base.

5-4

Installing Optional Equipment in the Space-Saver Base

Installing Additional Memory

6. Lift the top section at the front up so that you can separate the top’s hooks
from the bottom section’s slots. Remove the top. See Figure 5-3.

Figure 5-3 Separating the Top from the Bottom

Installing SIMMs

Electrostatic Discharge (ESD) can damage SIMMs and other components located
on the logic board. Make sure you touch a suitable ground before handling any
SIMM. If possible, set the NC on an anti-static mat and wear a grounding strap.

Always handle SIMMs only by the edges.

You r NC already has a
the left side of the logic board, are labeled J9 and J10. (See Figure 5-4.) Observe
the

SIMM(

Configurations,” on page 5-2 to determine your configuration. Decide what
you want your new configuration to be. If you need to remove an existing

, go to “Removing SIMMs” on page 5-7 and then return to this section

SIMM

for installation instructions.

Caution

SIMM

or

s) currently in the slots and refer to Table 5-1, “Memory

Installing Optional Equipment in the Space-Saver Base

s installed. The

SIMM

slots, located on

SIMM

5-5

Installing Additional Memory

Figure 5-4 Location of the SIMM Slots

SIMM slots

To install the

1. Orient the

SIMM

SIMM

(s):

so that the notch is facing towards the back of the logic

board. (See Figure 5-5.)

Slot

Figure 5-5 Orienting the SIMM

S

M

I

M

Notch

5-6

Installing Optional Equipment in the Space-Saver Base

Installing Additional Memory

2. Insert the
Figure 5-6.)

Figure 5-6 Inserting the SIMM

3. When you are certain the
ends of the
metal tabs on each end of the slot.

The

Removing SIMMs

To rem ov e a

1. Use your two forefingers or your thumbs to pull back on the two metal
tabs located on each end of the

into the slot at about a 45-degree angle. (See

SIMM

is inserted all the way, press down on both

SIMM

until it clicks into place. The

SIMM

should lie at about a 25- to 30-degree angle in the slot.

SIMM

:

SIMM

slot. (See Figure 5-7.)

SIMM

SIMM

should go past the

s

a

l

t

b

M

e

a

t

Metal tab

Figure 5-7 Metal Tab Locations

Installing Optional Equipment in the Space-Saver Base

5-7

Installing Additional Memory

2. As you pull back on the tabs, the
Figure 5-8.)

H

I

S

o

l

M

d

e

s

g

e

d

n

o

M

s

Figure 5-8 Removing the SIMM

3. Hold the

on both ends and remove it from the slot.

SIMM

Reassembling the Space-Saver Base

To rea sse mbl e th e NC, follow these steps:

1. Swing the front of the top section over the front edge of the bottom section
and continue down, placing the hooks on the top section in the slots on the
bottom, as shown in Figure 5-3 on page 5-5.

Note

Make sure the top section is resting completely aligned on the
bottom section before going to step 2.

pops up past the metal tabs. (See

SIMM

5-8

Installing Optional Equipment in the Space-Saver Base

Installing Additional Memory

Figure 5-9 Placing the Top on the Bottom

2. Gently press the top section down until the two tabs click through the two
openings on the bottom section. (See Figure 5-10.)

Figure 5-10 Joining the Top Cover to the Bottom Section

3. Install the cabling. See Section 3, “Basic Installation,” on page 3-1.

4. After the system is installed, perform the memory test. See “Te s t in g
Memory.”

Installing Optional Equipment in the Space-Saver Base

5-9

Installing Additional Memory

Testing Memory

The NC must be installed before you can run the memory test. After
installation, you can access the Boot Monitor to run the memory test.

Accessing the Boot Monitor

1. Turn on the system or reboot (if the system is already on).

2. After the Boot Monitor title and version number, messages similar to the
following appear. Press the Escape key to interrupt the booting process.

Searching for IP address...
Using IP address
Searching for subnet mask
Using subnet mask

...........................

>

Memory Test

Run the memory test as follows:

1. Type a question mark and press the Return key to find the command for
Extended Tests.

> ? <CR>

2. Type the Extended Tests command and press the Return key.

> EX <CR>

3. Type the number associated with the Test Available Memory test and press
the Return key.

Enter test number ?

4. Press the Return key to run the test once.

F Loop forever
E Loop until error
Q Main menu
<cr> Test once
Esc Abort testing
Enter choice? <CR>

IP address of terminal

subnet mask

(Press Escape to interrupt booting.)

Test-number

<CR>

If memory is good, a diagnostic code such as the following displays:

Pass -00000001

5-10

Installing Optional Equipment in the Space-Saver Base

If an error is detected, a message such as the following displays:

Expected bad component is JXX.

indicates the slot number of a bad

JXX

step 7. If errors are reported, continue with step 5.

5. Remove the bad

SIMM

to confirm that the remaining memory is good.

6. Add a new
installed

SIMM

and rerun the memory test to confirm that the newly

SIMM

is good.

7. Exit from the test and return to the Boot Monitor by typing:

Enter test type? Q <CR>

8. Reset the computer by typing:

rs <CR>

For information about the Boot Monitor commands, refer to
software documentation.

Installing PCMCIA Cards

The

PCMCIA

PCMCIA

vendors.

cards are 68-pin credit card-size devices that fit into the

slot. You can order these cards directly from

Installing PCMCIA Cards

. If there are no errors, go to

SIMM

from the slot indicated and rerun the memory test

ware

NCD

NC’s

or from other

NCD

Caution

Do not insert or remove the PCMCIA card while the NC is running. Always turn
NC power off first.

Do not use a 12-volt PCMCIA card on Explora 400/450 NCs. Only 5-volt PCMCIA
cards are supported.

Most

PCMCIA

direction you should insert them into the
so you cannot install them upside down.

The rear edge of the
If your card has this switch, it should be in the
enabled, data cannot be written to the card and an error message appears if
you try to do so.

cards have an arrow on the top face side showing which

PCMCIA

PCMCIA

card might have a write protect/enable switch.

Installing Optional Equipment in the Space-Saver Base

slot. The cards are keyed,

position. If write protect is

OFF

5-11

Installing PCMCIA Cards

Figure 5-11 shows the directional arrow and write protect/enable switch.

Directional
arrow

a

c

p

o

f

T

o

Figure 5-11 PCMCIA Card Features

Write protect/enable

d

r

switch set to off (if
applicable)

To install a

PCMCIA

1. Shut off the

2. If your

PCMCIA

3. See Figure 5-12. With the
card’s arrow side facing up, slide the card into the

card:

.

NC

card has a write protect switch, set it to

NC

’s

PCMCIA

slot on your left and the

OFF

PCMCIA

.

PCMCIA

slot until you

feel the card make contact with the pins in the socket.

Caution

Do not force the card into the socket. The card should go straight in.

4. Firmly push the card into the socket to seat it.

PCMCIA card

Figure 5-12 Inserted PCMCIA Card

5-12

Installing Optional Equipment in the Space-Saver Base

Installing the Power Y-Cable

Use the optional power Y-cable in place of the monitor’s line cord when you
have a power transformer that requires its own line cord. Install the Y-cable,
power transformer, and line cord as shown in Figure 5-13.

To N C

Power transformer (varies with voltage)

12.0 in.

(305mm)

Installing the Power Y-Cable

Y-cable (used with all voltages)

To mo ni to r

48.0 in.

(1220mm)

Line cord (115-volt shown)

6.0 in.

(152mm)

Figure 5-13 Transformer, Y-Cable and Line Cord

Installing the Security Device and Mounting Bracket

The security device and mounting bracket option includes all screws and an
installation instruction sheet. Refer to that instruction sheet to install them.

Installing Optional Equipment in the Space-Saver Base

5-13

Installing the Security Device and Mounting Bracket

5-14

Installing Optional Equipment in the Space-Saver Base

Installing Additional Memory

6 Installing Optional Equipment in the

Monitor Support Base

This section describes the installation of the Explora 400/450 optional
equipment for the monitor support base. If you have the space-saver base, see
“Installing Optional Equipment in the Space-Saver Base” on page 5-1. The
following optional equipment, shown in Figure 6-1, is available for the
monitor support base.

If you are adding additional memory, do so before doing Section 3, “Basic
Installation,” on page 3-1.

PCMCIA

PCMCIA card

Figure 6-1 Optional Equipment

Memory SIMM

Installing Additional Memory

You can add memory to your unit at any time. You may purchase it from
or other vendors. Only
warranty. Contact
vendors.

In the standard configuration, Explora 400 has 8
memory and the Explora 450 has 8 MB of
does not improve

SIMMs

Technical Support for information about approved

NCD

speed.

NC

Installing Optional Equipment in the Monitor Support Base

supplied by

EDO

Power Y-cable

are covered under

NCD

of fast-page mode

MB

memory. Adding more memory

NCD

NCD

’s

6-1

Installing Additional Memory

Each application running on your NC and each open window requires
memory. If the sum of all memory needed exceeds the installed memory, you
get a message to close windows. To avoid this message, add memory to your

.

NC

Both the Explora 400 and Explora 450 have two

slots. See Table 6-1 for

SIMM

the allowable configuration of the two slots and Table 6-2 on page 6-3 for a list
of

specifications.

SIMM

The following rules apply:

It makes no difference which slot is used as first slot and which is used as

❏

the second.

For the Explora 400 only, you can intermix fast-page mode and

❏

s. You will always get fast-page mode performance.

SIMM

For the Explora 450 only, you

❏

Table 6-1 Memory Configurations

Total M e m ory
(MB)

4 2218 162

4 4020 164

5 4124 168

6 4232 1616

8 4432 320

First
Slot (MB)

Second
Slot (MB)

must

install

EDO SIMM

Total M e m ory
(MB)

s.

First
Slot (MB)

EDO

Second
Slot (MB)

8 8033 321

9 8134 322

10 8236 324

12 8440 328

16 8848 3216

16 16 0 64 32 32

17 16 1

6-2

Installing Optional Equipment in the Monitor Support Base

Installing Additional Memory

Table 6-2 SIMM Specifications

Speed Fast-page mode (Explora 400) or EDO (Explora 450). 60

nanoseconds (ns) or faster. (Lower ns ratings are faster.) 72-pin.

Profile Low profile (maximum 1.1 inches (28 mm) tall). Use tin-plated

contacts.

SIMM

Thickness Board thickness of 0.047 inches to 0.054 inches (0.050 inches (1.27

mm) nominal). Installing
might damage the
erratically.

Size 32-bits wide.

1

(256Kx32

MB

2

(512Kx32

MB

4

(1Mx32

MB

8

(2Mx32

MB

16

(4Mx32

MB

32

(8Mx32

MB

SIMM

SIMM
SIMM
SIMM

SIMM
SIMM

slot or cause the NC to behave

SIMM

)

)
)
)

)
)

that are out of specifications

SIMMs

Caution

If you do not feel confident performing the following procedure on your NC, send
the NC to a qualified service center.

Installing additional memory is a four-step procedure described in detail on
the following pages:

1. Disassemble the

. See “Disassembling the Monitor Support Base” on

NC

page 6-4.

2. Install the

3. Reassemble the

(s). See “Installing SIMMs” on page 6-6.

SIMM

. See “Reassembling the Monitor Support Base” on

NC

page 6-10.

4. Test the memory after your

is up and running. See “Tes t in g M e mo r y ”

NC

on page 6-11.

The only tool you need is a small flat-blade screwdriver.

Installing Optional Equipment in the Monitor Support Base

6-3

Installing Additional Memory

Disassembling the Monitor Support Base

1. Remove all cables connected to the base. If a

PCMCIA

card is installed,

remove it.

2. Place the base with the top up and the front facing you (preferably, on an
anti-static mat).

3. Use your finger to release the clip on the front control panel and remove
the panel. See Figure 6-2.

Figure 6-2 Removing the Front Control Panel

4. Use a small flat-blade screwdriver to release the two tabs located on the
front of the

, as shown in Figure 6-3.

NC

6-4

Installing Optional Equipment in the Monitor Support Base

Installing Additional Memory

Figure 6-3 Releasing the Tabs

5. Lift the top section up at the front so you can slide the top’s tabs from the
bottom section’s slots to separate the cover from the bottom. See
Figure 6-4.

Caution

Lift the top section up at the front only until you can slide the top’s tabs from the
bottom section’s slots. If you lift the top section too high, the tabs can break.

Installing Optional Equipment in the Monitor Support Base

6-5

Installing Additional Memory

Ta b

Slot

Figure 6-4 Removing the Top Cover

Installing SIMMs

Caution

Electrostatic Discharge (ESD) can damage SIMMs and other components located on
the logic board. Make sure you touch a suitable ground before handling any
SIMM. If possible, set the NC on an anti-static mat and wear a grounding strap.

Always handle SIMMs only by the edges.

6-6

Installing Optional Equipment in the Monitor Support Base

Installing Additional Memory

You r NC already has a

SIMM

or

s installed. The

SIMM

slots, located on

SIMM

the left side of the logic board, are labeled J9 and J10. (See Figure 6-5.) Observe
the

SIMM(

s) currently in the slots and refer to Table 6-1, “Memory
Configurations,” on page 6-2 to determine your configuration. Decide what
you want your new configuration to be. If you need to remove an existing

, go to “Removing SIMMs” on page 6-9 and then return to this section

SIMM

for installation instructions.

SIMM slots

Figure 6-5 Location of the SIMM Slots

Installing Optional Equipment in the Monitor Support Base

6-7

Installing Additional Memory

To install the

1. Orient the

SIMM

SIMM

(s):

so that the notch is facing towards the back of the logic

board. (See Figure 6-6.)

S

M

t

S

l

o

I

Figure 6-6 Orienting the SIMM

2. Insert the

into the slot at about a 45-degree angle. (See

SIMM

Figure 6-7.)

M

Notch

Figure 6-7 Inserting the SIMM

3. When you are certain the
ends of the

until it clicks into place. The

SIMM

SIMM

metal tabs on each end of the slot.

The

6-8

Installing Optional Equipment in the Monitor Support Base

should lie at about a 25- to 30-degree angle in the slot.

SIMM

is inserted all the way, press down on both

should go past the

SIMM

Removing SIMMs

Installing Additional Memory

To rem ov e a

SIMM

:

1. Use your two forefingers or your thumbs to pull back on the two metal
tabs located on each end of the

b

s

a

l

t

a

t

M

e

Metal tab

Figure 6-8 Metal Tab Locations

2. As you pull back on the tabs, the

slot. (See Figure 6-8.)

SIMM

pops up past the metal tabs. (See

SIMM

Figure 6-9.)

H

I

S

o

l

M

d

M

e

s

d

g

e

Figure 6-9 Removing the SIMM

3. Hold the

on both ends and remove it from the slot.

SIMM

Installing Optional Equipment in the Monitor Support Base

s

o

n

6-9

Installing Additional Memory

Reassembling the Monitor Support Base

To reassemble the base, follow these steps:

1. Swing the back of the top section over the back edge of the bottom section
and align the tabs on the top section with the slots on the bottom section,
as shown in Figure 6-10.

Tab

Slot

Figure 6-10 Placing the Top Cover on the Bottom Section

2. Lower the front of the top section until the three tabs slide through the
three slots on the bottom section.

3. Replace the front control panel.

4. Replace the PCMCIA card if appropriate. See “Installing PCMCIA Cards”
on page 6-12.

5. Install the cabling. See Section 3, “Basic Installation,” on page 3-1.

6. After the system is installed, perform the memory test. See “Te sting
Memory” on page 6-11.

6-10

Installing Optional Equipment in the Monitor Support Base

Testing Memory

The NC must be installed before you can run the memory test. After
installation, you can access the Boot Monitor to run the memory test.

Accessing the Boot Monitor

1. Turn on the system or reboot (if the system is already on).

2. After the Boot Monitor title and version number, messages similar to the
following appear. Press the Escape key to interrupt the booting process.

Searching for IP address...
Using IP address
Searching for subnet mask
Using subnet mask

...........................

>

Memory Test

Run the memory test as follows:

1. Type a question mark and press the Return key to find the command for
Extended Tests.

> ? <CR>

2. Type the Extended Tests command and press the Return key.

> EX <CR>

3. Type the number associated with the Test Available Memory test and press
the Return key.

Enter test number ?

4. Press the Return key to run the test once.

F Loop forever
E Loop until error
Q Main menu
<cr> Test once
Esc Abort testing
Enter choice? <CR>

Installing Additional Memory

IP address of terminal

subnet mask

(Press Escape to interrupt booting.)

Test-number

<CR>

If memory is good, a diagnostic code such as the following displays:

Pass -00000001

Installing Optional Equipment in the Monitor Support Base

6-11

Installing PCMCIA Cards

If an error is detected, a message such as the following displays:

Expected bad component is JXX.

indicates the slot number of a bad

JXX

Step 7. If errors are reported, continue with Step 5.

5. Remove the bad

SIMM

to confirm that the remaining memory is good.

6. Add a new
installed

SIMM

and rerun the memory test to confirm that the newly

SIMM

is good.

7. Exit from the test and return to the Boot Monitor by typing:

Enter test type? Q <CR>

8. Reset the computer by typing:

rs <CR>

For information about the Boot Monitor commands, refer to
software documentation.

Installing PCMCIA Cards

The

PCMCIA

PCMCIA

vendors.

cards are 68-pin credit card-size devices that fit into the base

slot. You can order these cards directly from

. If there are no errors, go to

SIMM

from the slot indicated and rerun the memory test

ware

NCD

or from other

NCD

Caution

Do not insert or remove the PCMCIA card while the unit is running. Always turn
off the computer first.

Do not use a 12-volt PCMCIA card on Explora 400/450 NCs. Only 5-volt PCMCIA
cards are supported.

Most

PCMCIA

direction you should insert them into the
you cannot install them upside down.

The rear edge of the
your card has this switch, it should be in the
enabled, data cannot be written to the card and an error message appears if
you try to do so.

6-12

Installing Optional Equipment in the Monitor Support Base

cards have an arrow on the top face side showing which

PCMCIA

card might have a write protect/enable switch. If

PCMCIA

OFF

slot. The cards are keyed, so

position. If write protect is

Installing PCMCIA Cards

Figure 6-11 shows the directional arrow and write protect/enable switch.

Directional
arrow

d

r

a

o

c

f

p

o

T

Figure 6-11 PCMCIA Card Features

Write protect/enable
switch set to off (if
applicable)

To install a

PCMCIA

1. Shut off the

2. If your

PCMCIA

3. With the arrow side facing up, slide the card into the

card:

.

NC

card has a write protect switch, set it to

.

OFF

PCMCIA

slot until

you feel the card make contact with the pins in the socket.

Caution

Do not force the card into the socket. The card should go straight in.

4. Firmly push the card into the socket to seat it. (See Figure 6-12.)

PCMCIA card

Figure 6-12 Inserted PCMCIA Card

Installing Optional Equipment in the Monitor Support Base

6-13

Installing the Power Y-Cable

Installing the Power Y-Cable

Use the optional power Y-cable in place of the monitor’s line cord when you
have a power transformer that requires its own line cord. Install the Y-cable,
power transformer, and line cord as shown in Figure 6-13.

To N C

Power transformer (varies with voltage)

12.0 in.

(305mm)

Y-cable (used with all voltages)

To mo ni to r

48.0 in.

(1220mm)

Line cord (115-volt shown)

6.0 in.

(152mm)

Figure 6-13 Transformer, Y-Cable and Line Cord

6-14

Installing Optional Equipment in the Monitor Support Base

7 Specifications

Table 7-1 contains Explora 400/450 specifications.

Table 7-1 Explora 400/450 Specifications

Category Topic Specification

Hardware
architecture

Display monitor Resolution

Microprocessor

Explora 400 PPC 403GA, 33 MHz

Explora 450 PPC 403GCX, 66 MHz

Video Coprocessor S3 TRIO64V2/DX (both models)

DRAM

Explora 400 8 MB fast-page mode

Explora 450 8 MB EDO

PROM 512KB flash (both models)

Memory upgrades

Explora 400 2 SIMM slots

Explora 450 2 SIMM slots

NVRAM 512 Bytes (both models)

Display memory

Explora 400 1 MB

Explora 450 2 MB

Explora 400 640x480, 800x600, 1024x768, 1152x900

Explora 450 640x480, 800x600, 1024x768,

Refresh rate Up to 85 Hz

32-bit, 60ns, fast-page mode SIMMs

32-bit, 60ns, EDO SIMMs

1152x900, 1280x1024

Specifications

7-1

Table 7-1 Explora 400/450 Specifications (Continued)

Category Topic Specification

Power transformer AC voltage and

AC frequency

North America 90-132 VAC, 60 Hz (

Power
consumption

Environmental
operating range

Controls and
indicators

European/
Australian

Japanese 85-110 VAC, 50 Hz (

Temperature 10

Humidity 10% to 90% non-condensing

Altitude Up to 3,050 meters (10,000 feet)

NC Power switch, Power LED, Network

Keyboard N-97K: Three configurable LEDs

180-265 VAC, 50 Hz (

19 Watts (maximum)

°

C (50° F) to 40° C (104° F)

Activity, and Twisted-Pair Link
Indicator.

(Unlabeled, Caps Lock, and Network
Activity)

±

3 Hz)

±

±

3 Hz)

3 Hz)

7-2

Specifications

N-101M/N-101MPS/N-102/
Windows 95-compatible keyboards:
Three configurable LEDs (Num Lock,
Caps Lock and Scroll Lock)

N-108LK: Four configurable LEDs
(Hold Screen, Lock, Compose, and
Network Activity)

N-123 Sun Type 5-compatible: Four
configurable LEDs (Caps Lock,
Compose, Scroll Lock, and Number
Lock)

Table 7-1 Explora 400/450 Specifications (Continued)

Category Topic Specification

Input devices Keyboards 97-key UNIX style keyboard (N-97)

97-key Kana keyboard (Japanese
characters) (N-97K)

101-key PS/2 style keyboards
(N-101M, N-101MPS)

Windows 95-compatible keyboards

102-key international version (N-102)

108-key LK401-compatible keyboard
(N-108LK)

N123 Sun Type 5-compatible
keyboard (N-123)

Mouse Three-button, PS/2

Communications Ethernet

Explora 400 Built-in 10BaseT twisted-pair

transceiver

Explora 450 (All) Built-in 10/100BaseTX twisted-

pair transceiver
(Option in place of audio output)
Thin coax Ethernet

Serial port RS-232 C up to 115.2 K baud

Parallel port Connector: 25-pin

Data: bidirectional 8-bit parallel
Logic level: TTL level

PCMCIA Standard PCMCIA PC card Standard

Release 2.01, 68-pin connector

Audio Standard 1/8-inch stereo mini-jack

Specifications

7-3

Table 7-1 Explora 400/450 Specifications (Continued)

Category Topic Specification

Physical
Dimensions

Space-saver base

Height
Width
Depth

Weigh t
Space-saver base in
stand

Height

Width

Depth

Weigh t
Monitor support
base

Height

Width

Depth

Weigh t

1.9 inches (4.8 cm)

7.6 inches (19.3 cm)

11.3 inches (28.7 cm)

2.6 pounds (1.2 kg)

9.6 inches (24.4 cm)

5.5 inches (13.9 cm)

11.3 inches (28.7 cm)

2.8 pounds (1.3 kg)

2.1 inches (5.3 cm)

12.8 inches (32.5 cm)

13.2 inches (33.5 cm)

5.5 pounds (2.5 kg)

7-4

Specifications

8 Troubleshooting

network computers have four major components:

NCD

Base

❏

Monitor

❏

Keyboard

❏

Mouse

❏

If found to be faulty, the base or monitor must be returned for repair. The
mouse, or keyboard are replaceable.

Isolating Faulty Components

One of the best ways of tracking down hardware problems is to swap
components among compatible NCs. Swapping components lets you
determine which component is faulty.

Isolating Faulty Components

For example, if a keyboard appears to be faulty, turn off the
keyboard, and connect a keyboard from another
keyboard works, you know that the problem is with the first keyboard and
not with another component, such as the base.

Mouse Troubleshooting

Most mouse problems are caused by a dirty ball or a loose connection
between the mouse cable and the base. If you have problems using your
mouse:

1. Check the mouse cable connector. Make sure it is firmly connected to the
base’s mouse connector.

2. Remove the ball from the mouse. Clean the ball and its socket, and
reassemble the mouse.

3. Clean your mouse pad or the area of the desk where your mouse sits.

NCD NC

, disconnect the

NC

. If the second

Troubleshooting

8-1

Monitor Troubleshooting

Monitor Troubleshooting

Generally, if the monitor is out of focus, too bright, or too dark, adjust the
monitor’s brightness and contrast knobs. Each monitor model has its own set
of controls. Check the monitor operating booklet for more information about
your monitor.

Base Troubleshooting

A flashing power indicator indicates there is a hardware problem in the base.

If you find you must return a base for repair, send it in the same configuration
as when it failed.

In Case of Trouble

If you encounter difficulties, either contact your local

representative or:

NCD

8-2

Troubleshooting

Phone

❏

Send a

❏

Send e-mail to

❏

See

❏

Regardless of the method you use to report the problem to
have the following information ready:

❏

❏

❏

❏

❏

❏

NCD

Your name and title

Company or organization

Phone number

E-mail address

Billing address

Shipping address

Technical Support at [phone]

NCD

to

FAX

’s home page at

Technical Support at [phone]

NCD

Technical Support at

NCD

http://www.ncd.com

[e-mail]

, you must

NCD

For each hardware item:

❏

— Serial number

— Description of the problem

— Type of warranty (Standard, Express, Extended, Express Exchange,

Out-of-Warranty)

Returning Components

If you have to return a component, follow these steps.

1. Gather the information listed in “In Case of Trouble” on page 8-2 and
contact
(RMA) number.

2. Once you have obtained an
return.

If you would rather not pack the component yourself,
that you take it to a commercial packing and shipping company.

3. Mark each return package with the assigned
each package as shown below to avoid problems or delays:

Customer Service
Network Computing Devices
350 North Bernardo Avenue
Mountain View, CA 94043

RMA

NCD

number

In Case of Trouble

Technical Support to obtain a Return Material Authorization

number, package the component for

RMA

recommends

NCD

number and address

RMA

Note

Equipment returned without an
delays or might be returned to the sender.

Ethernet Address of Replacement Bases

If a base is replaced, its Ethernet address is different on the replacement base.
You must change system files that contain Ethernet addresses.

Comments on the Booklet

You can send comments, suggestions, or questions about this booklet to the

Technical Publications Department by Internet e-mail. Write to

NCD

[e-mail]

.

number is subject to

RMA

Troubleshooting

8-3

In Case of Trouble

8-4

Troubleshooting