Mitsubishi Apricot LS Series User guide

Apricot
LS SERIES
Owner’s Handbook

APRICOT LS SERIES
OWNER’S HANDBOOK
MINITOWER (LY) EDITION

Microsoft, MS-DOS, Windows and Windows NT are registered trademarks
of Microsoft Corporation in the US and other countries.
LOC Technology is a trademark of Apricot Computers Limited.
Other trademarks mentioned within this document and not listed above are
the properties of their respective owners.
Information contained in this document is subject to change without notice
and does not represent a commitment on the part of Apricot Computers
Limited. Any software described in this manual is furnished under a license
agreement. The software may be used or copied only in accordance with the
terms of this agreement. It is against the law to copy any disk supplied for
any purpose other than the purchaser’s personal use.
No part of this manual may be reproduced or transmitted in any form or by
any means electronic or mechanical including photocopying and recording,
for any purpose, without the express written permission of the publishers.
Copyright © Apricot Computers Limited 1997. All rights reserved.
Published by:
Apricot Computers Limited
3500 Parkside
Birmingham Business Park
Birmingham, England
B37 7YS
http://www.mitsubishi-computers.com
Printed in the United Kingdom

Safety & regulatory notices
i
SAFETY AND REGULATORY
NOTICES
General
Electrical
The computer uses a safety ground and must be earthed.
The system unit AC power cord is its ‘disconnect device’. Ensure that the
system unit is positioned close to the AC power outlet and that the plug is
easily accessible.
The power cord packed with the computer complies with the safety
standards applicable in the country in which it is first sold. Use only this
power cord. Do not substitute a power cord from any other equipment.
To prevent fire and electric shock, do not expose any part of the computer
to rain or moisture. Turn off the computer and unplug all power cords
before moving or cleaning the system unit, or removing the system unit covers.
Battery
This product contains a lithium battery.
Do not use a metal or other conductive implement to remove the battery.
If a short-circuit is made between its positive and negative terminals the
battery may explode.
Replace a discharged battery with one of the same type; another type may
explode or ignite. Follow the instructions contained in the Owner’s
Handbook to replace the battery. Dispose of a discharged battery promptly
and in accordance with the battery manufacturer’s recommended
instructions. Do not recharge, disassemble or incinerate the discharged
battery. Keep away from children.
Laser products
Any CD-ROM drive fitted in this system is classified as a CLASS 1 LASER
PRODUCT according to IEC825 Radiation Safety of Laser Products
(Equipment Classification: Requirements and User's Guide). The CLASS 1
LASER PRODUCT label is located on the underside of the system unit.
The CD-ROM drive contains a laser system which is harmful to the eyes if
exposed. Do not attempt to disassemble the CD-ROM drive; if a fault
occurs, call an authorised maintainer.

Safety & regulatory notices
ii
Use the CD-ROM drive only as described in this manual. Failure to do so
may result in exposure to hazardous radiation.
Ergonomic
When positioning the system unit, monitor and keyboard, take into
account any local or national regulations relating to ergonomic
requirements.
Anti-static precautions
WARNING
Static electricity can cause permanent damage to electronic components.
You should be aware of this risk, and take precautions against the
discharge of static electricity into the computer.
The computer is at risk from static discharge while any of the covers are
off. This is because the electronic components of the motherboard are
exposed. Memory modules, expansion cards and replacement processors
are examples of electrostatic sensitive devices (ESSDs).
All work that involves removing the cover must be done in an area
completely free of static electricity. We recommend using a Special
Handling Area (SHA) as defined by EN 100015-1: 1992. This means that
working surfaces, floor coverings and chairs must be connected to a
common earth reference point, and you should wear an earthed wrist strap
and anti-static clothing. It is also a good idea to use an ionizer or
humidifier to remove static from the air.
When installing any upgrade, be sure you understand what the installation
procedure involves before you start. This will enable you to plan your
work, and so minimise the amount of time that sensitive components are
exposed.
Do not remove the system unit cover, nor the anti-static bag or wrapping
of any upgrade, until you need to.
Handle static-sensitive items with extreme care. Hold expansion cards and
add-on components only by their edges, avoiding their electrical contacts.
Never touch the components or electrical contacts on the motherboard or
on expansion cards. In general, do not handle static-sensitive items
unnecessarily.
Keep all conductive material, and food and drink, away from your work
area and the open computer.
Thermalcote bonding compound
The thermal bonding compound used between the system processor and
its heat sink can cause skin irritation and stain clothing. Avoid prolonged

Safety & regulatory notices
iii
or repeated contact with skin. Wash thoroughly with soap and water after
handling. Avoid contact with eyes and inhalation of fumes. Do not ingest.
Maintenance
Switch off and disconnect all cables before attempting to clean the
computer.
Do not use sprays, solvents or abrasives that might damage the system unit
surface. Do not use cleaning fluids or sprays near air vents, ports, or the
diskette and CD-ROM drives.
Occasionally wipe the system unit with a soft, slightly damp, lint-free
cloth.
Occasionally wipe over the air vents on the rear and sides of the system
unit. Dust and fluff can block the vents and limit the airflow.
Occasionally clean the diskette and CD-ROM drives using a proprietary
head cleaner.
Occasionally wipe the monitor with a soft, slightly damp, lint-free cloth. It
is best to use anti-static glass cleaner on the monitor screen, but do not
spray glass cleaner directly onto the screen; it could run down inside the
case and damage the circuitry.
Transporting
Use common sense when handling the computer; hard disks in particular
can be damaged if the computer is dropped or handled roughly. As a
precaution, back up the contents of the hard disks to tape or diskettes
before moving the computer.
Switch off and disconnect all cables before attempting to move the
computer, In particular, do not try to move the computer while it is
plugged into the AC power supply.
When lifting and carrying the computer, use the metal sides of the system
unit and never attempt to lift the system unit with a monitor still on top.
If you need to transport the computer any great distance, use the original
packing materials.
If you are planning to use the computer in another country, it may not be
suitable, check with your supplier, particularly on the availability of the
correct AC power cords.
NOTE
Any existing maintenance or warranty agreement may not be supportable in
another country. The system may have to be returned to the supplier.

Safety & regulatory notices
iv
Standards
Safety
This product complies with the International safety standard IEC950 and
the European safety standard EN60950 which will, when applicable,
include the national deviations for the country in which it is sold.
Electro-magnetic Compatibility (EMC)
This product complies with the following European EMC standards:
Emissions EN50022 Class B
Immunity EN50082-1
This product also complies with the following International EMC
standards:
VCCI Level 1 (Japan)
Notes
All interconnecting cables (for example, signal and communication cables)
should be less than 2 metres in length. If cable extensions are used, ensure
adequate earth connections are provided and screened cables are used.
If any metal casework components are removed, during upgrade work for
example, ensure that all metal parts are correctly re-assembled and all
internal and external screws are re-fitted and correctly tightened.
Legalities
This equipment complies with the relevant clauses of the following
European Directives (and all subsequent amendments):
Low Voltage Directive 73/23/EEC
EMC Directive 89/336/EEC
Telecommunications Directive 91/263/EEC
CE Marking Directive 93/68/EEC
IMPORTANT
This system complies with the CE Marking Directive and its strict legal
requirements. Use only parts tested and approved by Mitsubishi Electric PC
Division. Failure to do so may result in invalidating both the compliance
and your warranty. All expansion cards, drives and peripherals must carry
the CE mark to ensure continued compliance.

Safety & regulatory notices
v
Power Connection
Typical AC plugs
250V
E
LN
E
NL
250V
E
NL
125V
250V
NL
E
250V
BS1363A SHUCO NEMA 5-15P SRAF 1962/DB16/87 ASE 1011
U. K. Austria Belgium Taiwan Denmark Switzerland
Finland France Thailand
Italy Germany Japan
Sweden Norway USA
Holland Canada
Checking the AC power supply
When this product is delivered, it is ready for the commercial AC power
supply generally available in the country in which it is first sold. It has been
set for the correct voltage range, and is supplied with an AC power cord
and plug which comply with the relevant safety standards.
Before using the product in a country other than that in which it was
originally sold, you must check the voltage and frequency of that country’s
AC power supply, and the type of power cord required there. Check the
power rating labels on the rear of the computer’s system unit and its
monitor to ensure that they are compatible with the AC power supply.
The computer can function within two alternative AC power supply
ranges, according to the position of the voltage selection switch on the rear
of the system unit:
Switch setting AC power supply (voltage and frequency)
115 100 - 120 volt AC, 50 - 60 Hz
230 200 - 240 volt AC, 50 - 60 Hz
The voltage setting of the monitor must always be the same as the voltage
setting of the system unit. See the User’s Guide that accompanies the monitor
or consult your supplier to find out how to change the voltage setting.
CAUTION
It is imperative that the computer is set to the correct voltage range before
use. If not, the machine may be irreparably damaged.

Safety & regulatory notices
vi
Connecting to the AC power supply
IMPORTANT
Any peripheral equipment that requires an AC power cord must be earthed.
Use the following guidance to connect the components together. It is
important that you take each step in the order indicated.
1. Before connecting any components, ensure that the AC power
supply is switched off or disconnected, and that the system unit, the
monitor, and any peripherals are turned off.
2. Connect the component signal cables to their respective ports on the
system unit: keyboard, mouse, monitor, audio (where appropriate)
and any other peripherals.
◊ Where appropriate, connect the computer to the network.
3. Connect the component power cords: system unit, monitor to
system, plus any other peripherals to nearby, grounded AC power
outlets. (Never substitute a power cord from any other appliance).
Then switch on or connect the AC power supply.
4. Turn on the system unit first, then the monitor, then other
peripherals.
Power Cable Connections - UK ONLY
This equipment is supplied with an AC power cord that has a non-
removable plug.
Always replace the fuse with one of the same type and rating which is BSI
or ASTA approved to BS1362. Always refit the fuse cover, never use the
plug with the fuse cover omitted.
External Speakers (where supplied)
Always switch off or disconnect the AC supply before disconnecting any of
the speaker leads, whether audio or power. Disconnect the AC supply from
the speaker power unit when not in use for any period of time.
To prevent the risk of electric shock, do not remove speaker covers.
Connecting the speaker power cord to any other cords or joining cords
together can cause fire and risk of electric shock.

LS700 HANDBOOK CONTENTS/1
CONTENTS
Safety and Regulatory Notices
General i
Standards iv
Legalities iv
Power connection information v
1 System Description and Installation
Feature Summary 1/1
Dimensions 1/1
Front Panel Controls and Indicators 1/2
Back Panel Connectors and Features 1/3
Selecting a Site 1/4
Power Supply 1/4
Before Installing Optional Items 1/6
2 Chassis and Components
Before You Begin 2/1
Chassis Covers 2/2
Add-in Cards 2/8
Peripheral Carriers and Devices 2/12
Installing Hard Disk Drives 2/16
Installing Full-width Devices 2/21
Other Chassis Components 2/23
3 System Motherboard
Motherboard Layout 3/2
Configuration Modes 3/3
PCI/IDE Peripheral Interface 3/7
I/O Features 3/7
CMOS Battery 3/9
USB Interface Support 3/10
Speaker 3/11

Contents
2/CONTENTS LS700 HANDBOOK
Motherboard Connectors 3/11
Audio Subsystem 3/14
Hardware Monitor Option 3/15
Front Panel Connections 3/15
Motherboard Resources 3/17
4 Upgrading
Processor 4/1
How to Install Memory 4/6
How to Remove Memory 4/9
5 BIOS and Setup
Overview of the BIOS Setup Program 5/1
Maintenance Menu 5/3
Main Menu 5/3
Advanced Menu 5/6
Security Menu 5/11
Exit Menu 5/16
Note Down Your Settings for Reference 5/17
6 Troubleshooting
Problems when Starting 6/1
Troubleshooting Checklist 6/4
The System’s Disk Drives 6/5
Error Messages 6/6

Contents
LS700 HANDBOOK CONTENTS/3
Figures/Illustrations chapter/page
1. Front Panel Controls and Indicators 1/2
2. Back Panel Connectors and Features 1/3
3. Selecting the Input Voltage Setting 1/5
4. Removing the Top Cover 2/3
5. Removing the Access Side Cover 2/4
6. Removing the Non-access Side Cover 2/6
7. Removing the Bezel 2/7
8. Removing the Expansion Slot Cover Bracket 2/8
9. Removing an Expansion Slot Cover 2/9
10. Installing an Add-in Card 2/11
11. Removing the Carrier 2/12
12. Removing the Main Peripheral Carrier 2/14
13. Removing the Floppy Diskette Drive 2/15
14. Installing a Hard Drive in the Carrier 2/17
15. Installing a Hard Drive behind the Power Supply 2/18
16. Installing a Hard Drive in the Main Peripheral Carrier 2/20
17. Install/remove a Full-width Peripheral Device 2/22
18. Removing the Fan/card Guide Module 2/23
19. Removing the Power Supply 2/25
20. Motherboard Components 3/2
21. Back Panel I/O Connectors 3/3
22. Location of the Configuration Jumper Block 3/4
23. Motherboard Connectors 3/11
24. Front panel Connections 3/15
25. Removing the Heatsink Support Top Bar and the Processor 4/2
26. Installing the Processor Retention Mechanism 4/4
27. Installing the Processor 4/5
28. Installing the Heatsink Support Top Bar 4/6
29. Location of DIMM Sockets 4/7
30. Installing a DIMM 4/8

LS700 HANDBOOK 1/1
1 SYSTEM DESCRIPTION
AND INSTALLATION
This chapter provides a basic description of the LS700,
along with simple installation information.
Feature Summary
♦ A removable carrier with bays that can accommodate
one of the following variations:
◊ Three half-height full-width peripherals
◊ One full-height and one half-height full-width
peripherals
◊ Two half-height full-width peripherals and one
narrow peripheral
♦ A removable carrier with bays that can hold one floppy
diskette drive and one narrow hard disk drive.
♦ A non-removable bay that can hold one narrow hard
disk drive.
♦ 200 watt (peak) ATX power supply switchable between
115 and 230 volts AC.
♦ Seven slots for add-in cards.
♦ Padlock hole.
Dimensions
The weight includes the complete chassis assembly with the
power supply and the optional fan.
Width 22.7 cm Height (feet installed) 37.5 cm
Depth 43.2 cm Weight (chassis only) 7.97 kg

System description and installation
1/2 LS700 HANDBOOK
Front Panel Controls and Indicators
Figure 1. Front Panel Controls and Indicators
E
F
A
B
C
D
A. Power on/off light. Turns on when the power is on.
B. Hard disk light. Turns on when the computer reads or
writes data to an IDE hard disk.
C. Floppy diskette drive.
D. Bay for full-width devices, shown here with an optional
CD-ROM drive installed.
E. Power control button. Press to turn on the computer.
F. Bays for other full-width devices, shown with two plastic
filler panels in place.

System description and installation
LS700 HANDBOOK 1/3
Back Panel Connectors and Features
Figure 2 shows a typical configuration including a power
supply and external motherboard I/O connectors.
Figure 2. Back Panel Connectors and Features
C
D
A
BE
A. Power supply fan vent holes.
B. Socket for AC power cord.
C. Add-in card slots.
D. Typical motherboard I/O connectors. See the
motherboard section for further information.
E. Input voltage select switch.

System description and installation
1/4 LS700 HANDBOOK
Selecting a Site
Choose a site that is:
♦ Clean and as dust free as possible.
♦ Well ventilated and away from sources of heat includ-
ing direct sunlight.
♦ Well away from sources of water or damp.
♦ Stable and protected from sources of vibration or
physical shock.
♦ Isolated from strong electromagnetic fields produced by
electrical devices, such as large air-conditioning units.
♦ Equipped with a properly earthed power outlet within
easy reach.
♦ In regions that are susceptible to electrical storms, it
may also be advisable to plug your system into a surge
suppresser.
◊ Disconnect telecommunication lines to any modem
during an electrical storm.
Power Supply
Checking the Input Voltage Setting
A 200 watt (peak) power supply is integrated into the chassis
to provide power for the motherboard, add-in cards, and
peripheral devices. A switch on the back panel can be used to
set the power supply to operate at:
♦ 115 V AC (in the range of 100 - 120 V AC), or
♦ 230 V AC (in the range of 200 - 240 V AC)
To verify that your system has the correct setting for your
environment, check the input power selection switch. This
should already be correctly set for the country of sale.

System description and installation
LS700 HANDBOOK 1/5
Figure 3. Select the Input Voltage Setting
115
230
WARNING
The power cable shipped with the system is correct for the
country of supply. If you wish to use the computer in another
country, it may not be suitable, contact your Apricot dealer for
information.
AC Input
Voltage (50/60 Hz) Current
115 V (100-120 V) 3.5 A
230 V (200-240 V) 2.0 A
WARNING
To avoid damage to the motherboard or power supply, do not
exceed a total of 160 watts of continuous power draw, or a 200
watt surge for a maximum of 12 seconds.

System description and installation
1/6 LS700 HANDBOOK
Power Supply Output
DC Voltage Current (Max. continuous)
+12 V 6.0 A
+5 V 18.0 A
+5V Standby 0.01 A
+3.3 V 14.0 A
-5 V 0.3 A
-12 V 0.8 A
NOTE
Due to load sharing among the power supply outputs, the
maximum continuous current outputs of all voltages cannot be
achieved simultaneously.
Before Installing Optional Items
Before installing other items, such as drives, add-in cards,
etc., connect a keyboard and a monitor to the system, switch
on and let the power-on self test (POST) run. This will be
followed by initialisation of the pre-installed Operating
System software, during which you will be asked to enter
personal registration details.
Once this has been fully completed, you can shut down the
operating software, turn the power off, then install any
drives, add-in cards, or upgrades, the instructions for which
are given in the following chapters.
This is to allow ‘Plug and Play’ add-in cards and their special
features to be correctly detected and configured.

LS700 HANDBOOK 2/1
2 CHASSIS AND
COMPONENTS
This chapter describes how to take apart and reassemble the
chassis and the major components.
Before You Begin
♦ Be sure to do each procedure in the correct order.
♦ Set up an equipment log to record the computer’s
model and serial numbers, all installed options, and
other information about the computer. If you need this
information, it will be easier to consult the log than to
open up and examine the computer.
♦ Observe antistatic precautions at all times whenever any
cover is removed and while handling any components.
◊ Information and guidance on antistatic precautions
can be found in the appendix at the rear of this
handbook.
♦ You will need a Phillips (#2 bit) and a flatblade
screwdriver.
♦ Turn the computer power off by pressing the power
control button.
♦ Unplug the AC power cord from the back of the
chassis.
♦ Turn off and disconnect all peripheral devices
connected to the computer, e.g. printer or modem.

Chassis and Components
2/2 LS700 HANDBOOK
WARNING
The power supply in this computer contains no user-serviceable
parts. To avoid personal injury or damage to your equipment,
refer repair or replacement of the power supply to qualified
technical personnel only.
Chassis Covers
Removing the Top Cover
1. Observe the precautions in ‘Before You Begin’, at the
beginning of this chapter.
2. If you are removing the cover for the first time, you
may need to remove the plastic plug in the padlock
hole (see Figure 4). Save it for re-installation.
◊ If you installed a padlock on the chassis, unlock the
padlock and remove it.
3. Grasp the top cover at the rear of the chassis.
4. Slide the cover towards the rear of the chassis until it
stops (just over 1cm).
5. Lift the cover away from the chassis.