Mitsubishi Electric APRICOT FT4200 Owner's Manual

FT4200

Owner’s Handbook

NATIONAL

ACCREDITATION

OF CERTIFICATION

BODIES

APRICOT FT4200

OWNERS HANDBOOK

Adaptec is a registered trademark of Adaptec Inc.
Cirrus Logic is a trademark of Cirrus Logic Inc.

®

Intel and Pentium
Microsoft, MS-DOS, Windows

Pro are registered trademarks of Intel Corporation.

®

and Windows ® NT are registered trademarks of

Microsoft Corporation in the US and other countries.
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 furnis hed under a license agr eement.
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 s upplied for any pur pose 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 1996. All rights reserved.

Published by:
Apricot Computers Limited

3500 Parkside
Birmingham Business Park
Birmingham, England
B37 7YS

http://www.apricot.co.uk

Printed in the United Kingdom

Notices

E

N

L

125V

SAFETY AND REGULATORY NOTICES

Power

Information in the Owner’s Handbook relating to connection to the AC
power supply may not apply outside the United Kingdom.

The computer uses a safety ground and must be earthed. The system unit
AC power supply cable 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 supply within the FT4200 server automatically sets itself to the
appropriate voltage, there is no voltage selector switch. It is advisable to
avoid subjecting the power supply to voltages outside the ranges 100-120V
AC and 220-240V AC, (50/60 Hz).

To prevent fire and electric shock, do not expose any part of the computer to
rain or moisture.

Shut down the operation of the computer as described in the Owner’s
Handbook, turn off the battery isolator switch and unplug the power supply
cable before moving the system unit, cleaning the computer or removing the
side panels. An exception to this is removing the side panels before hot­plugging a hard disk drive.

Power cord requirements

The AC power supply cable packed with the computer complies with the
safety standards applicable in the country in which it is first sold. Use only
this power supply cable.

Do not substitute a power supply cable from any other equipment.

If you wish to use the computer in another country, you must ensure that
you use an AC power supply cable and AC plug which complies with the
safety standards of that country.

The power supply cable fittings should bear the certification mark of the agency
responsible for evaluation within the country of use. Refer to your authorised
supplier if you ever need additional or alternative power supply cables.

Typical AC plugs

250V

E

L N

BS1363A SHUCO NEMA 5-15P

United Kingdom Austria, Belgium, Taiwan, Thailand

250V

E

N L

Finland, France,
Germany, Holland,
Italy, Norway, Sweden

NoteNote

Any ancillary equipment using an AC power supply cable should be earthed.

SAFETY/1

Notices

Laser

Ergonomic

Any fitted CD-ROM drive contains a laser system which is harmful to the
eyes, and is classified as a CLASS 1 LASER PRODUCT according to
IEC825 Radiation Safety of Laser Products (Equipment Classification:
Requirements & User's Guide).

CLASS 1
LASER PRODUCT TO IEC 825

LASER KLASS 1
PRODUKT NACH IEC 825

The CLASS 1 LASER PRODUCT warning label, bearing similar
information to the sample above and in high visibility colours, is located on
the CD-ROM unit.

Do not attempt to disassemble the CD-ROM drive; if a fault occurs, call an
authorised maintainer. Use the CD-ROM drive only as described in this
manual. Failure to do so may result in exposure to hazardous radiation.

When positioning the system unit, monitor and keyboard, take into account
any local or national regulations relating to ergonomic requirements.

Batteries

Small batteries

This product contains a replaceable lithium battery. Do not use a metal or
other conductive implement to remove the battery. If a short-circuit is
accidentally made between its positive and negative terminals, it may cause
the battery to explode.

Replace a discharged battery with one of the same type. Another type may
explode or ignite. Dispose of a discharged battery promptly and in
accordance with the manufacturer’s instructions.

The battery’s average life is between 3 and 5 years. Do not recharge,
disassemble or incinerate. Keep away from children. If in any doubt, contact
your supplier or an authorised maintainer.

UPS battery pack

The UPS is equipped with a replaceable battery pack. It will provide electric
power for your system for a specific period of time, depending on how many
hard disks or other devices are installed.

The battery pack contains lead acid batteries. In the EEC the directive
91/157/EEC (plus subsequent amendment 93/86/EEC) designates
batteries containing lead to be handled as a dangerous substance.

SAFETY/2

Similar regulations will apply in other countries.

As a result, the battery pack must only be removed by a qualified electrician
and must not be disposed of in domestic waste.

Standards

The applicable standards for the country of sale will be shown on the label
fixed to the rear of the system.

Safety

This product complies with the following European safety standards:

EN60950

and when applicable, will include the national deviations as required for the
following countries:

UK Germany Denmark etc.

This product also complies with the following International safety standards:

UL1950 (USA)

Electro-magnetic Compatibility

This product complies with the following European EMC standards:

Notices

Legalities

Emissions EN55022 Class B * test dependant *

Immunity EN50082 Level 1 * test dependant *

This product also complies with the following International EMC standards:

VCCI level 2 (Japan)

NoteNote

All interconnecting and communication cables to the likes of printers, monitors,
or modems, should be less than 2 metres in length. If cable extensions have to be
used, ensure adequate earth connections are provided. All cables should be
screened.

This equipment complies with the relevant clauses of following European
Directives:

Low voltage Directive 73/23/EEC

EMC Directive 89/336/EEC

CE marking Directive 93/68/EEC

SAFETY/3

Notices

IMPORTANT

Power Cable Connections - UK ONLY

This equipment is supplied with an AC power lead that has a non-removable
moulded plug. If the AC supply outlets to be used are not suitable for the
lead supplied with this computer, a new complete and suitable power lead
should be obtained. If this is not possible, the existing plug should be cut off
and the following guidelines observed:

WarningWarning

The plug severed from the mains lead must be destroyed, as a plug with the bared
flexible cord is extremely hazardous if engaged in a live socket outlet.

The following wiring information should be employed when adding any
replacement plug.

The wires in the power lead are coloured in accordance with the following code:

Green and Yellow Earth
Blue Neutral
Brown Live

The colours of the wires in the mains lead supplied with this computer may
not correspond with the markings identifying the terminals in your plug,
proceed as follows:

The wire which is coloured green-and-yellow must be connected to the
terminal in the plug which is marked with the letter E, or by the earth
symbol or coloured green or green-and-yellow.

WARNINGWARNING

THIS APPLIANCE MUST BE EARTHED.

The wire which is coloured blue must be connected to the terminal which is
marked with the letter N or coloured black. The wire which is coloured
brown must be connected to the terminal which is marked with the letter L
or coloured red.

Always replace the fuse with one of the same type and rating, always replace
the fuse cover, never use the plug with the fuse cover omitted.

Replace with same colour fuse cover only. Replacement fuse covers may be
obtained from your dealer.

This diagram shows the wiring inside the moulded plug. Use it as a guideline if
you need to re-fit a plug of a similar type to the AC lead.

E

SAFETY/4

L

N

CONTENTS

Section One

This section explains the setting up of your system and using the Front Panel
Controls. There is information about back panel functions and ports, security
aspects and the EISA Configuration Utility. This section also gives you details
about how to install additional processors, memory and expansion cards.

Setup and Operation

Front View 1/1
Rear Panel 1/3
Machine Interior 1/4
Setting Up Your System for the First Time 1/6
Using the Front Panel 1/7
Security 1/9
Automatic Failure Recovery 1/10
Using the EISA Configuration Utility, (ECU) 1/10
The Flash Memory 1/12

Upgrading and Expansion

Gaining Access to the Machine Interior 2/1
Upgrading the CPU 2/2
Additional CPU card 2/6
Upgrading Memory 2/7
Installing and Removing Expansion Cards 2/10

Chapter / page

Section Two

This section contains detailed information for an authorised engineer, with
all the procedures to follow if a fault develops within the system.

Preliminary Service Information

Preliminary Service Tasks 3/2
Antistatic Precautions 3/2
Equipment Required 3/2

Hard disk drives and modules

Hard Disk Drive 4/1
Hard Disk Drive Module 4/3
Hard Disk Drive Module Backplane 4/5

Front panels and drives

Front Bezel 5/1
Front Panel 5/2
Removable Media Drives 5/6

SMC

System Management Controller (SMC) 6/1
SMC Cooling Fan Assembly 6/3

Chapter / page

CONTENTS

Fans

Hard Disk Drive Cooling Fan Assembly 7/1
Motherboard Cooling Fan Assembly 7/4
Fan sub-assembly 7/5

Motherboard

System Motherboard 8/1
Motherboard Power Distribution Panel 8/7

Power Booards and Speaker

Hard Disk Drive Power Distribution Panel 9/1
Removable Media Drive Bay Power Distribution Panel 9/3
Loudspeaker 9/4

UPS and Battery Pack

Uninterruptible Power Supply Unit 10/2
UPS Battery Pack 10/8

Contents

Section Three

This section contains more in-depth technical details, as well as functional
information about memory, electronics and circuitry.

Technical Information / Overview

Functional Architecture 11/2
Memory 11/4
Central Processing Unit 11/6

Motherboard

Motherboard layout 12/1
Expansion slots 12/2
I/O map, slot assignments, DMA, interrupts 12/3
Switches and Jumpers 12/6
Bus connections and ports 12/7

System Management Cards

System Management Interface card 13/1
System Management Controller 13/7

Power System

Power Distribution Boards 14/1
Uninterruptible Power Supply 14/2

Chapter / page

Diagnostic Codes Reference

Front panel LCD 15/1
Codes from the SMIC BIOS 15/8
Codes appearing in the SMA 15/8

Appendix

Important information about antistatic precautions.

CONTENTS

APRICOT FT4200

Section One

Startup and operating,

Upgrading and expansion

Setup and operation

1 SETUP AND OPERATION

This section identifies the different parts of your system, explains what you
should do when using the system for the first time and shows you how to
carry out tasks which are part of normal operation.

Front View

The following illustration shows a front view of the server with the front
drive bay door open:

10
11

12

13

6

8

2

1

3

5

4

7

16

9

COMPACT

Cassette

Drive

Open/Close

SLOT-4

DC

Write Protect

Step

15

14

Figure 1-1 Front View

1. Diagnostic Codes LCD 9. 3.5” Floppy Drive

2. P

3. C

4. S

5. R

OWER ON

ONTROL

TANDBY

ESET

Button 10. 5.25” CD ROM Drive

Button 11. Drive Bay Door Keylock

Button 12. Drive Bay Door

Button 13. Air Intake Vents

6. Infrared Sensor 14. Removable Side Panel

7. UPS LED 15. Side Panel Keylock

8. Power LED 16. Side Panel Floating Fasteners

1/1

Setup and operation

The following paragraphs give a brief explanation each item on the front of
the machine:

♦ Diagnostic Codes LCD - Displays diagnostic codes that indicate

errors or normal stages in the boot process (see the chapter Diagnostic
Codes).

♦ P

OWER ON

button - Pressing this button switches the machine from

Standby mode to On mode.

♦ S

TANDBY

button - Holding this button down powers down the

server from On mode to Standby mode. This button also has special
functions in conjunction with other buttons (see Special Button
Functions later in this chapter).

♦ C

ONTROL

button - Pressing this button silences alarms which sound

because of internal errors. It also has special functions in conjunction
with other buttons (see “Special Button Functions” later in this
chapter).

♦ R

button - Performs a hard reboot of the system. This button

ESET

also has special functions in conjunction with other buttons (see
“Special Button Functions” later in this chapter).

♦ P

LED - Indicates whether the server is On or is in Standby

OWER

mode.

♦ UPS LED - Indicates whether the system is receiving power from the

battery pack or from the mains electricity supply. It also indicates the
status of the battery pack.

♦ Lockable drive bay door - Provides security against unauthorised

access to the removable media drives. The key to this door serves as
the token used to control the built-in security subsystem (see
“Security” later in this chapter).

♦ Air Intake Vents - Openings in the front bezel through which the

system draws air in order to prevent overheating. These must not be
blocked or restricted in any way.

♦ Removable Side Panel - Provides protection for the internal

components and security against unauthorised access to the interior
of the server.

Greater detail of the controls and their use is given in the following pages of
this chapter, along with important information on connecting and setting up
your system.

1/2

Rear Panel

Setup and operation

The rear panel contains the various ports and connectors as shown in the
following illustration:

5

10

1

3

6

2

4

7

8

9

11

12

13

Figure 1-2 Rear Panel

1. Keyboard Connector (PS/2) 8. Expansion Slot Openings

2. Mouse Connector (PS/2) 9. Stud for Antistatic Strap

3. Serial Port COM2 10. Removable UPS Battery Pack

4. Serial Port COM1 11. UPS External Circuit Breaker

5. SMC Modem Port 12. Uninterruptible Power Supply

6. Video Connector 13. AC Power Socket

7. Parallel Port

1/3

Setup and operation

Machine Interior

The interior of the server consists of the following main areas:

♦ Hard Disk Subsystem
♦ Removable Media Drive Bay
♦ Motherboard
♦ Systems Management Controller Board
♦ Uninterruptible Power Supply
♦ Cooling Fans

To gain access to the interior of the machine, you must remove the side
panels. Chapter 2, Upgrading and expanding, contains side panel removal
instructions.

Hard Disk Subsystem

The hard disk subsystem is the area in which the hard disks are located. It
occupies the lower portion of the disk drive chamber. It can be configured to
accommodate up to 20 hard disk drives. For full details refer to the chapter
on hard drives in the service section of this handbook.

Figure 1-3 View of hard disk subsystem

1. Disk Subsystem 2. Cooling Fan Assembly

Removable Media Drive Bay

The removable media drive bay is the area which can contain drives such as
floppy, CD ROM and tape backup drives. The bay will accommodate up to
four half-height 5.25-inch drives. Your system will contain at least one 3.5­inch 1.44-Mbyte floppy disk drive.

User access to the drive bay is through the lockable drive bay door on the
front bezel. The lock on the door is fitted with a sensor which, when security
is enabled, sounds an alarm if the door is opened without using the key to
unlock it, i.e. if it is forced.

1

2

1/4

Motherboard

Setup and operation

The motherboard contains the various disk controllers and other electronics
necessary to control the server’s functions. It contains the memory and first
two processors as well as PCI and EISA expansion slots.

Figure 1-4 Motherboard in the Electronics chamber

Uninterruptible Power Supply

This power supply is designed to keep your system powered up for a
limited period of time after, or during a power failure. It is equipped
with an on-line removable battery pack and will give you enough time to
shutdown the network and the server without losing valuable data. The
power supply, including the battery pack, occupies the entire lower level of
the server chassis.

The UPS will maintain power to the system for a minimum of 4 minutes in
a fully-laden system, i.e. equipped with 20 hard disk drives. This time will be
longer in a system equipped with fewer drives.

NoteNote

In the event that the mains power fails, the LCD will display a countdown of the
number of seconds remaining until the battery pack is fully discharged. The
Event Manager User’s Guide contains more details about this feature.

Cooling Fans

Your computer is equipped with six thermally controlled and alarmed
cooling fans, three on each side of the machine. These will prevent
overheating by maintaining an appropriate temperature inside the system.

In addition there are two cooling fans within the UPS unit.

1/5

Setup and operation

CautionCaution

You must maintain at least 15 cm space around the computer for adequate
ventilation. Otherwise damage could result from overheating.

Setting Up Your System for the First Time

After you have unpacked the server and rolled it into position, use the
jacking mechanism on the front castors to immobilise it. Then go through
the following steps to start up the system:

♦ Connect the monitor signal, keyboard and AC power cables to the

sockets on the server’s back panel.

◊ See the guide supplied with the monitor for details on its

connections to an AC supply and general information about its
signal cable.

♦ Establish the appropriate link which will enable you to run the System

Management Application (SMA), such as:

◊ Direct link to another PC. In this case, use the supplied serial-to-PC

cable to connect the SMC modem port to the serial port on the
separate diagnostic computer.

◊ Modem link to a computer at another location. Use the supplied

serial-to-modem cable to connect the SMC port to the modem.

◊ In some cases you can also run the SMA over the network itself,

from one of the connected computers, depending on the operating
system.

♦ Switch the AC supply on, followed by the UPS isolation switch on the

rear of the system. (For safety during transportation, this is locked in
the off position with a strap).

◊ The Uninterruptible Power Supply LED should display steady

green (battery fully charged) or flash green (battery pack is
charging). If the LED is flashing, it will take a maximum of 36
hours to charge the batteries from full discharge.

◊ The system is now in Standby mode.

♦ Locate and press the P

OWER ON

button to switch the machine on.

When the system is up and running normally following boot-up and all
software loaded, the display code on the front LCD panel will be 0000. If
any codes appear other than normal procedure codes, then refer to the
chapter dealing with Diagnostic codes towards the end of this handbook.
Some codes are transitory, being way markers for the boot-up process.

Before proceeding further, read carefully the following pages in this chapter.
They contain important information about the controls and their functions.

1/6

Using the Front Panel

This section describes the functions of the front panel during normal
operation.

CautionCaution

Do not place any large or heavy objects on the top, especially near to the front
facia. Likewise avoid leaning on the machine. It may inadvertently cause the
operation of one or more front panel buttons.

Setup and operation

6

2

1

3

5

4

8

7

Power On

Control

Figure 1-5 Front Panel Controls

1. Diagnostic LCD 5. Reset Button

2. Power On Button 6. Infrared Sensor

3. Control Button 7. UPS LED

4. Standby Button 8. Power LED

Press this button to switch the system on from Standby mode. The Power
LED will light up and the system will initiate its boot sequence. Diagnostic
codes, expressed as hexadecimal numbers, will appear as a matter of course
on the LCD screen on the Front Panel (see the chapter Diagnostic Codes
Reference for details). The screen will display the SCSI ID number for each
of the SCSI devices installed in your system. What happens after this depends
on how your Apricot has been configured, i.e. which operating system or other
software may be installed. Check with your supplier if you need more details.

Press this button to silence alarms and clear LCD display codes that are produced
because of internal errors and power failures (but not security alarms).

Pressing C

ONTROL

at the end of firmware initialisation forces the System
Management Controller (SMC) to execute the code of the EPROM instead
of the Flash ROM, even if the version in the Flash is newer than that of the
EPROM. This allows you to boot from EPROM if there is something wrong
with the Flash code.

1/7

Setup and operation

NoteNote

It is good practice to warn anyone who may be accessing the system remotely, i.e.
using the SMA from a remote computer via the modem port, before you press the
S

TANDBY

button.

Standby

After you have instructed all network users to close their applications down
and log off the network, hold this button down for a specific period of time
before the system initiates a shutdown sequence to Standby mode. The
system will display the code 1200 on the LCD and sound a tone. Continue
to hold down the S
shutdown sequence begins. In Standby mode, the mains electricity supply
keeps the battery pack fully charged, but there is no DC power supplied to
the system. Use the System Management Application (SMA) to specify, in
seconds, how long you must hold down the button before the shutdown
sequence begins (see the SMA User’s Guide). The default is 3 seconds.

TANDBY

button until the tone stops, at which time the

♦ Press S

TANDBY

Standby sequence. (Only if last client is loaded)

NoteNote

When accepted, the Standby timer requests that the operating system be shutdown,
thus the final screen message will be “Shutdown or Restart OS.” If Restart is selected
the motherboard is reset and the POST sequence initiated. During this period the
SMC timer is still running and can move the system into Standby at any point. To

prevent possible data loss or corruption it is recommended to always select
Shutdown in this situation.

Reset

Press this button to initiate a hardware reset, but only if it is absolutely
necessary. The LCD will display 1400. You must hold the button down
until the accompanying tone stops sounding. Use the System Management
Application (SMA) to specify how long, in seconds, the reset tone will sound
(see the SMA User’s Guide). The default is 3 seconds.

♦ Press R

ESET

sequence. (Only if last client is loaded)

Special Button Functions

CautionCaution

Do not use these functions unless there is serious problem with the system and it is
absolutely necessary.

and C

and C

ONTROL

ONTROL

simultaneously to cancel the current

simultaneously to cancel the current reset

1/8

Pressing S

TANDBY

, C

ONTROL

and R

simultaneously while the front

ESET

drive bay door is unlocked switches the system into a mode in which these
three buttons have special functions. The LCD displays 8888 to indicate this
mode. The following paragraphs describe the special function of each
button.

♦ S

TANDBY

or R

- Pressing either of these buttons initiates a

ESET

memory dump to the central processing unit by activating and then
deactivating the Non-Maskable Interrupt (NMI) signal via the
diagnostic processor. The effect of this action will depend on the
operating system. You can then use the appropriate function of the
network operating system to examine the contents of the dump.

Setup and operation

♦ C

ONTROL

connected to the SMC modem port on the back panel of the server. If
the modem initialisation is successful, the LCD displays the code 0000.
If the initialisation is unsuccessful, the LCD displays 0F4D or 0F4E.

♦ S

TANDBY

LCD and then releasing them executes an independent SMC reset.
This would only be necessary if a major problem or error had occurred
in the system, which is unlikely.

If you do not press any buttons for ten seconds, the system returns to normal
mode.

UPS and Power LEDs

The UPS and Power LEDs indicate the state of the system as follows:

UPS LED

♦ When this LED shows steady green, it means that the system is

powered by mains electricity and the batteries are fully charged.

♦ Flashing green means that system is powered by mains electricity and

the batteries are in the process of charging. This will usually be the case
after the system has been without mains electricity, i.e. disconnecting
the plug or a power failure.

♦ Steady amber indicates that the system is drawing its power off the

batteries, i.e. there is no mains electricity. As soon as mains electricity
fails, an alarm sounds.

- Pressing this button initialises the modem, which is

+ R

- Pressing these buttons simultaneously clears the

ESET

Security

♦ Flashing amber indicates that the battery pack is about to fail.
♦ Off shows that the batteries are disconnected because the circuit breaker

switch on the back of the machine is in the Off position or the system is
disconnected from the mains.

Power LED

♦ Steady green means that the system is on and powered.

Your Apricot is equipped with a security system to help prevent unauthorised
persons tampering with the front panel buttons and gaining access to the
interior of the system.

Security is enabled within the System Management Application (see the
SMA User’s Guide, the Event Manager User’s Guide or the on-line help within
the SMA software). Once security is enabled, the key to the removable drive
bay door at the front of the machine serves as the security token:

♦ If the door is closed and has been locked with the key, the screen is

blanked, the keyboard is disabled, the security alarm is activated and
will sound if there is a violation.

♦ Unlocking the door unblanks the screen, enables the keyboard and

deactivates the security alarm.

1/9

Setup and operation

NoteNote

When security is enabled and the door locked, you can use the KeyLOC infrared
card to unblank the screen and enable the keyboard temporarily. The card will
also silence a security alarm. Use the card again to blank the screen and disable
the keyboard.

The following actions are security violations and will set off the alarm when
the drive bay door is closed and locked and security is enabled:

♦ Forcible opening (i.e. without the key) of the removable drive bay door.
♦ Removal, with or without the key, of one or both of the side panels.
♦ Pressing the S

TANDBY

any combination.

To silence the alarm, use the key to unlock the drive bay door. If the door is
already unlocked when the alarm sounds, first lock and then unlock the
door. Alternatively, use the KeyLOC card to silence the alarm.

Automatic Failure Recovery

As with any computer system, your server may develop a hardware or
software fault, which, for example, may only manifest itself intermittently,
that causes the system to hang. If this happens, the server is capable of
resetting itself automatically. This is particularly useful if the server is
unattended some or all of the time.

, C

ONTROL

or R

buttons individually or in

ESET

Whether the server is able to rebuild the complete network environment,
together with application programs, after an automatic reset depends on the
operating system. The SMA contains several variables which govern the
behaviour of automatic failure recovery:

♦ Machine Status
♦ Watchdog Timeout
♦ Watchdog Timer Reboot Count
♦ Watchdog Timer Timeout Action

You can make settings for these variables to enable, disable or modify their
effects. The on-line Help system within the SMA contains details of all of
these variables and how to make the appropriate settings.

Using the EISA Configuration Utility (ECU)

The ECU automates the configuration process for your computer’s hardware
and the boards (ISA, EISA, Plug-n-Play and PCI) or options that you add to
the system. You must run the ECU each time you change your computer’s
configuration. The ECU does the following:

♦ Maintains system parameters and stores these in non-volatile RAM.
♦ Presents the option settings that specify those parameters.
♦ Assigns all necessary system resources, to eliminate conflicts.

1/10

♦ Presents settings for other functions, such as date and time.

NoteNote

You should use only the ECU to configure your system, as other setup utilities
may not be accessible via a remote computer or over a network.

Setup and operation

To run the ECU

♦ Locally, press F2 to run the Flash Disk Utility during the hardware

boot sequence but before the operating system loads, remotely, run the
Flash Disk Utility via the SMA.

◊ You also can use the SMA to instruct the system to load the ECU

automatically (see the SMA User’s Guide). The Flash Disk Utility
menu then appears on the screen.

♦ Select “Run Configuration Utility” from the Flash Disk Utility menu.

In a short while you will be presented with a screen similar to this:

EISA Configuration Utility

Main Menu

Learn about configuring your computer

Configuring your computer
Set Date
Set Time
Maintain system configuration disk
Exit this utility

HELP
Help text will appear in
this box for whichever
topic is highlighted.

How to use the ECU

The Help text will provide most of the instructions you will need to use the
ECU. The following paragraphs briefly explain the general techniques for
navigating your way through the utility.

Using menus and selection screens

♦ To select an option from a menu or selection screen, use the UP or

DOWN ARROW key to move the highlight to the option and press
the ENTER key.

NoteNote

The fact that the some of the sub-menu options are listed as numbered steps does not
necessarily imply that you must select them in numerical order every time you run
the ECU.

♦ Some screens contain vertical scroll bars on the right-hand edge, which

indicate that there is more information than one screen can
accommodate. You can use UP or DOWN ARROW to scroll through
the information. If you need to scroll quickly through a series of
screens, use PAGE UP or PAGE DOWN.

♦ Use the ‘escape’ key to return through the menu structure. If you have

made any changes you will be prompted to save them first, or warned
that you must save them or changes will be lost.

1/11

Setup and operation

ECU Help

A help box is always available giving basic information on whichever menu
item is currently highlighted. More detailed and useful information can be
found as a simple tutorial in the first menu item, ‘Learn about configuring
your computer’.

Configuration

When you are ready to configure the computer, select the appropriate item
on the menu. Brief messages informing you of the loading into memory of
the configuration files will be displayed then you will be presented with a
screen similar to this:

Step 1. Important EISA configuration information
Step 2. Add or remove boards
Step 3. View or edit details
Step 4. Examine switches or print report
Step 5. Save and exit

EISA Configuration Utility

Main Menu

Additional small information boxes may appear at the bottom of some
screens giving, for example, “press enter to select” or “press ‘ESC’ to return
to main menu”.

The Flash Memory

The Flash is a special portion of read-only memory (ROM). It differs from
conventional ROM in that its contents can be updated, but it still preserves
its information when system power is off. The following components of your
server contain their own portions of Flash memory:

♦ The motherboard - This Flash stores the BIOS information for the

motherboard.

♦ The System Management Controller - This Flash stores the BIOS and

firmware which control the SMC and the Front Panel.

♦ The System Management Interface Card (SMIC) - This is the main

Flash, also referred to as a Flash Disk. It contains bootable DOS, its
own BIOS and a Flash Disk Utility program which affects the other
portions of Flash memory. The Flash Disk Utility also runs the EISA
Configuration Utility (ECU).

HELP
Help text will appear in
this box for whichever
topic is highlighted.

1/12

Your access to the Flash is via a RAMdrive. This enables you to treat the
Flash almost as if it were a disk drive. The RAMdrive and the Flash Disk
each have a capacity of 2 Mbytes. Because the Flash Disk contains the
operating system files, the server can boot from it if the normal system hard

disk boot process fails. You can also copy files to the Flash Disk, e.g.
hardware component configuration (.CFG) files which the ECU uses. If you
are using the RAMdrive to enter details of an add-in card, you must

remember to update the Flash disk before closing.

The Flash Disk Utility

The RAMdrive is necessary is because the Flash Disk is write-protected and
therefore you cannot copy anything directly to it. The purpose of the Flash
Disk Utility is to enable updates to the information held in any portion of
Flash memory, such as new BIOS versions or hardware information stored in
the ECU.

To run the Flash Disk Utility locally, press F2 during the hardware boot
sequence but before the operating system loads. This instructs the server to
boot from the Flash Disk and load the utility. The screen then displays a
menu with the following options:

♦ Receive File - This option copies a file from the server to the

workstation which is running the SMA. If you are not using the SMA
and are running the utility locally, the file is copied from the Flash to a
floppy disk. After you select 1 from the menu, select the file you want
to copy and press the ENTER key.

Setup and operation

♦ Transfer File - This option is the opposite of Receive File, i.e. it copies

a file from the SMA workstation to the server or, if you are running the
utility locally, from a floppy disk to the Flash.

♦ Run Configuration Utility - Select this option to run the ECU (see

“Using the EISA Configuration Utility”, earlier in this chapter).

♦ Upgrade Motherboard BIOS - This option enables you to upgrade the

motherboard’s BIOS with a new version of BIOS information. This
information is in the form of a binary file. When you select this option,
you have the choice of either copying the binary file to the RAMdrive
and updating the BIOS in one operation or, if the correct binary file is
already copied, just performing the update.

♦ Upgrade SMIC BIOS and Upgrade SMC Firmware, are similar to

option 4.

♦ Upgrade Flash Disk - This option copies the contents of the RAMdrive

to the Flash Disk, thereby making the Flash identical to the RAMdrive.

CautionCaution

You must perform this step to copy information on add-in expansion cards back
to the Flash Disk, after installing any card and making the necessary entries in
the ECU on RAMdrive, All details will be lost to the system on a re-boot or reset.

♦ Reset Flash Disk for Upgrade - This option does the opposite to option

8, i.e. copies the contents of the Flash to the RAMdrive, thereby
making the RAMdrive identical to the Flash.

♦ Edit a File - Use this option to load a file into the Microsoft Edit

program for editing.

♦ Exit - This option exits from the Flash Disk Utility and passes control

back to the SMA.

1/13

Upgrading and Expansion

2 UPGRADING AND EXPANSION

This chapter explains the procedure for upgrading the CPU to one of higher
speed and also provides information on upgrading the memory. You can also
install expansion cards to increase your system’s capabilities.

Your system can support up to four CPUs. They all must be of the same
speed and type.

Important NoteImportant Note

This system has been tested to comply with CE marking and its strict legal
requirements. Use only Apricot tested and approved parts. Failure to do so may
result in invalidating both the compliance and your warranty. All expansion
cards must carry CE approvals.

Gaining Access to the Machine Interior

To gain access to the interior of the machine, you must remove the side
panels. The following illustration shows the securing screws and key lock
which are present on each side panel:

1

2

Figure 2-1 Side Panel Keylock and Floating Fasteners

1. Floating Fasteners 2. Keylock

To remove the side panel:

1. Refer to the SMA and note down the value of the TimeOnCharge
variable. This value expresses, in seconds, the remaining charge in the
UPS battery pack. Since isolating the battery pack (see below) sets the
TimeOnCharge variable to zero, you will need to reset the variable in
the SMA after you have completed the work and set the switch back to
the On position.

2. Power down the system to Standby mode.

3. Ensure that the battery pack is isolated (the circuit breaker switch on
the rear of the server must be in the Off position).

4. Disconnect the system from the AC supply.

2/1

Upgrading and Expansion

5. Loosen the floating fasteners, located at the top left and right corners of
the panel, until they move in and out freely. These fasteners are
mounted in a spring fitting and should not be separated from the panel.

6. Insert the side panel key into the keylock and turn it ¼ turn clockwise
to unlock the panel. Your system is equipped with one pair of side
panel keys. Both keys in the pair will unlock both side panels.

7. Press the panel firmly downwards, against the springs, in order to pull it
outward and then upward as shown:

Figure 2-2 Removal of side panel

Refitting the Side Panel

Use the following steps to refit the side panel:

1. Ensure that the lip on the inner surface of the side panel fits over the
chassis ridge at the panel bottom edge.

2. Press the panel downwards against the springs, then fit it in under the
top edge.

3. Tighten the floating fasteners.

4. Insert the side panel key into the lock and turn it clockwise as far as it
will go.

5. Push the lock inward until you feel the resistance of the metalwork.

6. Turn the lock ¼ turn anti-clockwise and remove the key.

7. Use the SMA and the front door key, as appropriate, to ensure that
Security is enabled.

Upgrading the CPU

Important NoteImportant Note

The procedures explained in this section are for authorised engineers only.

2/2

The first two CPU positions are located on the motherboard, towards the
top of the electronics chamber. A second pair of processors can be located on
an additional card which may be fitted at the top of the motherboard.

Upgrading and Expansion

7

1

3

4
5

2

6

To gain access, it is required to remove the protective metal plate which
covers the upper part of the electronics chamber. On completion of any
work it is important to replace this panel for airflow integrity.

1. Remove the securing screws as shown in the following diagram:

2

1

Figure 2-3 Protective Metal Plate

1. Protective Metal Plate 2. Securing Screws

2. Lift the metal plate away from the metalwork.

Memory and CPU locations

This diagram shows the positions of the CPUs and main memory:

1. VRM for processor ‘B’ 5. DIMM sockets 5-8

2. DIMM sockets 1-4 6. VRM for processor ‘A’

Figure 2-4 Memory, CPU and Clock switches

3. Processor ‘B’ 7. Clock and multiplier SWs

4. Processor ‘A’

2/3

Upgrading and Expansion

CautionCaution

All electronic computer components are sensitive to static electricity. Always take
antistatic precautions before handling such components (see the Appendix for more
details). An earthing stud is provided at the rear of the server.

To remove the existing processor

1. If the system was in use just before starting this procedure, the processor
will be hot, wait at least 15 minutes for it to cool down.

2. If there is no processor fan, a strong spring clip secures the large
heatsink to the processor. Release the end of the spring from the hook
on the front of the ZIF socket with care and slide the heatsink clear.
Handle carefully as there may be heat transfer compound on the
heatsink face.

◊ There may be a power lead for a fan if the processor has one fitted

in the place of a simple heatsink. Take note of the fan power lead
polarity before releasing it from its board connection.

Fig 2-5 Processor and ZIF socket assembly.

3. A lever attached to the ZIF socket secures the processor in the socket.
Unhook the lever from the locked position. Lift it upright (at right­angles to the motherboard). There may be a little stiffness at the
beginning and end of the lever’s movement.

4. Lift the processor out of the socket and place it on an anti-static surface
outside the system unit. Hold the processor by its edges and avoid

touching any of the metal pins.

WarningWarning

If the processor does not easily lift out of, or fit into the socket, do not force it or
damage may be caused to the processor and the socket. Consult your supplier or an
Apricot dealer.

To fit the upgrade processor

e

int l

2/4

Complete kits of Processor, Spring clip, Heatsink and Voltage Regulator
Module (VRM8) are available from your Apricot dealer.

1. Ensure that the securing lever on the ZIF socket is still in the upright
position.

CautionCaution

If the computer has more than one CPU fitted it requires all CPUs to be
upgraded. They must all be of the same speed and type.

2. Take the upgrade processor out of its anti-static packaging. Hold the

processor by its edges and avoid touching the metal pins. The processor

Upgrading and Expansion

and ZIF socket are designed to ensure that the processor can only install
in the correct orientation. (The pin pattern is totally different at one
end.) It will only fit into the socket one way.

e

int l

Fig 2-6 Fitting a processor

3. Place the processor in the socket, making sure that it is correctly aligned
and that you do not bend or otherwise damage the pins. Do not use
excessive force.

4. Move the ZIF socket lever to the locked position. Apply just enough
pressure to overcome the resistance offered by the lever. Ensure that it is
firmly locked into its down position.

5. Refit the heatsink if the new processor was supplied without one and
secure correctly the retaining spring. Ensure the heatsink is central on
the processor and is securely held.

◊ If the spring is no longer required, remove it completely by

disengaging it from its hook on the rear of the ZIF socket.

◊ The upgrade processor may have a fan power lead to be connected

to the pins on the board. The ‘Overdrive’ type processor however
may have its own internal connection for the fan power supply.

6. It is vital when fitting an additional processor, that the Voltage
Regulator Module (VRM8) is inserted into its socket/connector
adjacent to the processor’s ZIF socket. It will only fit one way.

2/5

Upgrading and Expansion

Now adjust the processor multiplier and external bus clock speed switches
on the motherboard (in conjunction with the new processor’s data sheet), as
in the following tables. Note that all other switch positions are reserved.

External bus clock Processor bus multiplier

Frequency SW1-5 SW1-6 SW1-1 SW1-2 SW1-3 SW1-4 Factor

66Mhz

60Mhz

50Mhz

off on on on on on x2

on off on off on on x2.5

on on on on off on x3

WarningWarning

Do not alter the processor or clock settings under normal operation unless
upgrading all the fitted processors. It could result in permanent damage to either
the motherboard or the processors.

Additional CPUs, ‘C’ and ‘D’

If there are two processors fitted to the motherboard and if it is required to
fit a third+fourth processor, the extra processor board will need to be fitted.

on off off on x3.5

on on on off x4

The procedure for fitting processors to this extra board is identical to that for
the motherboard, but for safety and ease of assembly it is recommended to
be completed before installing the card in the system, on a suitable antistatic
surface or mat. The processors and VRMs must be exactly the same as the
ones fitted to the motherboard. The additional processor board must be
inserted in the slot at the top of the motherboard:

1

5

6

2

3

4

Figure 2-7 The additional CPU card

2/6

1. VRM for processor ‘D’ 4. Fan connection (if required)

2. VRM for processor ‘C’ 5. Fan connection (if required)

3. ZIF socket for processor ‘C’ 6. ZIF socket for processor ‘D’

1. Disengage the termination board from its slot at the top of the
motherboard and place it in suitable packaging.

2. The additional CPU board then fits into the same socket, with the
processors facing downwards.

3. Fit the metal support strut into place. Hooks at one end fit into the fan
housing and the other end is fixed with a screw at the chamber rear.
Ensure that it is firmly fitted onto the edge of the CPU board.

Upgrading Memory

There are two memory locations each with sockets for four Dual Inline
Memory Modules (DIMMs). Slots are numbered from 1 to 8 (top to
bottom). Slots 2, 4, 6 and 8, form bank ONE and slots 1, 3, 5 and 7, form
bank TWO. Read the following guidelines carefully before proceeding
further:

♦ The first DIMM in the system must occupy memory socket 2 (bank

ONE).

◊ A second DIMM of the same capacity should go into socket 4

(which is also bank ONE).

◊ A second DIMM of a different capacity will need to go into socket 1

(the first socket of bank TWO).

◊ You must fill one, two or all four slots in any bank. Three DIMMs in

a bank is not supported. You must therefore fit 1, 2, or 4 modules.

Upgrading and Expansion

♦ All the DIMMs fitted in any bank must all be the same capacity. (See

the supported memory configuration table overleaf).

◊ EDO and FPM type DIMMs can be mixed.
◊ Bank TWO can have different capacity modules to bank ONE, but

must have the same number of modules as bank ONE.

◊ Use only 3.3 volt, gold contact modules.

♦ All fitted modules should be the same speed.

◊ 80ns, 70ns and 60ns are all supported, but 60ns may provide

performance benefits with some operating systems.

◊ The BIOS will adjust to the speed of the slowest module if they differ.

♦ The minimum configuration is one DIMM, but there are benefits in

fitting 2 or 4 DIMMs, as 2 or 4 way interleave, respectively, then
become available.

Interleave scheme

Interleave Bank ONE Bank TWO

1 way Socket
2 way Socket
4 way Socket

2+4+6+8

2

2+4

Socket

Socket

Socket

1+3+5+7

1

1+3

Summary

The first DIMM in the system must go into socket TWO (bank ONE) and
subsequent DIMMs of the same capacity are recommended to be placed in
sockets 4, 6, and 8, to take advantage of the memory interleave.

DIMMs of a different (or of the same) capacity can be fitted into bank
TWO, but again, all DIMMs in a bank MUST be the same. Bank TWO
must also contain the same number of DIMMs as bank ONE.

2/7

Upgrading and Expansion

The following table lists the supported memory configurations. Bank ONE
socket 2 must be used first. Bank TWO, when used, must have an identical
number of modules. They may be of different capacity but must be a
supported configuration from this table (see rules on previous page).

Total
memory

16-Mb

16-Mb

32-Mb

32-Mb

32-Mb

64-Mb

64-Mb

64-Mb

128-Mb

128-Mb

128-Mb

256-Mb

256-Mb

256-Mb

512-Mb

512-Mb

1-Gb

1st socket 2nd socket 3rd socket 4th socket

8 Mb 8 Mb - -

16 Mb - - -

8 Mb 8 Mb 8 Mb 8 Mb

16 Mb 16 Mb - -

32 Mb - - -

16 Mb 16 Mb 16 Mb 16 Mb

32 Mb 32 Mb - -

64 Mb - - -

32 Mb 32 Mb 32 Mb 32 Mb

64 Mb 64 Mb - -

128 Mb - - -

64 Mb 64 Mb 64 Mb 64 Mb

128 Mb 128 Mb - -

256 Mb - - -

128 Mb 128 Mb 128 Mb 128 Mb

256 Mb 256 Mb - -

256 Mb 256 Mb 256 Mb 256 Mb

Removing DIMMs

CautionCaution

Before attempting to remove or fit a DIMM, be sure to take proper antistatic
precautions, such as using an antistatic strap. (See the Appendix for more details
on antistatic precautions). An earthing stud is provided at the rear of the server.

If you wish to install an upgrade in a bank which is already occupied you
may need to first remove the existing DIMMs. For each DIMM in the bank:

Figure 2-8 Removal of DIMMs

1. Press gently the clips on each side of the socket gently outwards using
your forefingers. This will disengage the clips and lift the DIMM up
and out of the socket.

2/8

2. Taking care to avoid touching any of the components on the DIMM,

3. Place the DIMM in a suitable antistatic package.

Inserting DIMMs

ImportantImportant

Apricot Computers Ltd extensively tests many types of memory modules. DIMMs
obtained from any other source cannot be guaranteed to operate correctly or safely
with the rest of the system and software. Non Apricot parts may invalidate both
the CE approvals and the system warranty.

For each socket in the bank:

1. The DIMM will only install in one orientation. There are indents

Upgrading and Expansion

grip the top corners of the DIMM between thumb and first finger and
carefully lift the module out of the socket.

along the DIMM’s edge connector as shown:

Fig 2-9 A typical DIMM

2. Hold the DIMM with its metal connector strip nearest the board
surface.

3. Press the DIMM gently into the socket and ensure the end clip at each
end clicks into place, retaining the module in the socket.

Figure 2-10 Positioning the DIMM

4. If the clips will not latch easily, remove the module and start again.

Do not use excessive force

.

2/9

Upgrading and Expansion

Installing and Removing Expansion Cards

Important NoteImportant Note

The procedures explained in this section are for authorised engineers only.

The following illustration shows the positions of the expansion card slots in
the electronics chamber:

1

2

Installing

3

Figure 2-11 PCI and EISA/ISA Expansion Card Slots

1. PCI Slots 3. SMIC card (bottom slot)

2. EISA/ISA Slots

ImportantImportant

You must always replace the System Management Interface Card in its original fitted
position, i.e. the bottom EISA slot.

1. Study the expansion board’s installation guide and follow its directions.
The guide should tell you what kind of slot (i.e. PCI or EISA/ISA) you
will use and whether there are any jumpers or switches on the card that
you need to configure before fitting.

2. Remove the blanking plate from the rear panel access opening that
corresponds to the chosen PCI or EISA slot.

2/10

◊ Remember that one EISA/PCI slot is shared and therefore can only

accept one card of either type.

3. Detach the SMIC ribbon cable from the SMIC card temporarily, to
allow cards into the chamber.

4. Now fit the expansion card carefully into the slot. You can only install
it in one orientation. If your card is full-length, be sure to insert one
edge into the slider guide, attached to the cooling fan assembly
metalwork, as you fit the card.

Position rules

Upgrading and Expansion

Additional SCSI controllers

♦ These must be fitted in one of the bottom three PCI slots to avoid

boot-up conflicts with the onboard controllers.

RAID controllers

♦ These should also be fitted to the lower slots

PCI Ethernet cards

♦ Fit from the topmost PCI slot downwards

EISA Ethernet cards

♦ Any slot bar the lowest, which is strictly reserved for the SMIC

5

4

3

1
2

Figure 2-11 Fitting an Expansion Card

1. Card end guide/support 4. Blanking plates

2. Expansion Card 5. SMIC cable

3. Securing Screw

1. Ensure that the card is firmly seated in its slot, but do not use excessive
force.

2. Fasten the card in place using the blanking plate securing screw.

3. Fit any required cables to the board, ensuring their correct orientation.
Do not allow them to obstruct airflow from any of the cooling fans.

4. Refit the SMIC ribbon cable to the SMIC card.

5. Run the EISA Configuration Utility (ECU) to complete the installation
process. Full details are in the preceding chapter.

CautionCaution

Remember to copy the RAMdrive back to the Flash disk on the ECU. Otherwise
any configuration files added or updated will be lost when you exit the ECU.

2/11

Upgrading and Expansion

Removing

1. Unplug all cables connected to the board and remove them completely.

2. Remove the securing screw and pull the board out of the slot, leaving
an empty space on the rear panel for the blanking plate again.

3. Replace the original blanking plate to cover the rear opening to
maintain airflow integrity.

4. Run the EISA Configuration Utility (ECU) to inform the system that
you have removed the board.

CautionCaution

Remember to copy the RAMdrive back to the Flash disk on the ECU. Otherwise
all the updated configuration files will still be present when you exit the ECU.

2/12

APRICOT FT4200

Section Two

Detailed service Information

for authorised engineers

Preliminary Service Information

3 PRELIMINARY SERVICE

INFORMATION

If a problem should develop in your server within the warranty period, you should
first contact the authorised maintainer for an engineer to service the unit.

Ensure that only Apricot authorised spare parts are used.

CautionCaution

Only authorised engineers should carry out the procedures described in this
section. Your computer’s warranty could be invalidated.

Topics covered Chapter

Preliminary tasks, precautions, required tools 3

Hard Disk Drives 4

Drive Module, Drive Module Backplane

Front bezel, Front panel 5

Removable Media Drives

System Management Controller Board (SMC) 6

SMC Cooling Fan Assembly

Hard disk and Motherboard Cooling Fan Assemblies 7

Cooling fan sub-assembly

Motherboard, Processor card 8

Motherboard Power Distribution Panel

Hard Disk, 5.25-inch Bay Power Distribution Panels 9

Loudspeaker

Uninterruptible Power Supply Unit 10

UPS Battery Pack

CautionCaution

Read carefully the preliminary information and other details
overleaf before commencing any service work on the computer.

3/1

Preliminary Service Tasks

Before you can perform a service procedure, you must do the following:

1. Refer to the SMA and note down the value of the TimeOnCharge
variable. This value expresses, in seconds, the remaining charge in the
UPS battery pack. Since isolating the battery pack (see below) sets the
TimeOnCharge variable to zero, you will need to reset the variable in
the SMA after you have completed your service procedure and set the
switch back to the On position.

2. Power down the system to Standby mode.

3. Ensure that the battery pack is isolated (the circuit breaker switch on
the rear of the server must be in the Off position).

4. Unplug the power lead from the mains socket.

5. Remove the side panels (see Chapter 2, Upgrading Your System, for side
panel removal instructions).

CautionCaution

When you have completed your service procedure, always refit the side panels
before powering the server up again. The fitted side panels are essential to an
effective cool air flow through the machine.

Preliminary Service Information

Antistatic Precautions

All electronic components and equipment are sensitive to static electricity.
Even small electrostatic charges can render components useless or severely
shorten their working life. You should always take preventive measures
which generally involve:

♦ a common earth point
♦ an earthed bench or bench mat
♦ an earthed wrist strap

NoteNote

An antistatic earthing stud is provided on the rear panel of the server.

The Appendix contains more details about antistatic precautions.

Equipment Required

You will need the following tools to work on the system unit:

♦ Side panel key
♦ Phillips No.2 (cross-head) screwdriver, (magnetised type will help)
♦ Flat blade screwdriver
♦ Spanner for rear port fixings
♦ Socket set with fitting for M5 head (for bus bar connections)
♦ Torque wrench set to 5 Nm (for tightening bus bar connections)

3/2

Hard disk drives and modules

4 HARD DISK DRIVES AND

MODULES

WarningWarning

Read completely the instructions detailed in chapter 3 at the beginning of the
service section.

Hard Disk Drive

Your Apricot is equipped with SCSI hard disk drives which are hot
pluggable, i.e. you can remove or fit them while the system is powered up.
Use the following instructions if a specific hard disk needs to be replaced.
You can identify a specific drive by observing the labelling scheme as shown
in the following illustration:

A

Figure 4-1 Disk Subsystem Labelling Scheme

In addition to the external labelling scheme, (the disk numbers within any
module follow the same scheme) each SCSI drive, including the removable
media drives, is assigned its own SCSI identification number.

As the system boots up, a list will appear for each SCSI adapter, listing the
drives attached to it. It will also give drive SCSI identification numbers,
along with brief details of each drive.

B

C

ED

1
2

3
4

CautionCaution

It may be wise to keep a separate written record of which trays are fitted with
drives. alongside their specification and then update this record with any changes
or additions.

4/1

Hard disk drives and modules

Removing a drive

1. Turn the hard disk tray release handle anti-clockwise until it stops,
which is almost one complete turn. As you turn the handle, the tray
ejects slightly.

1

2

Figure 4-2 Release Handle Rotation

1. Disk Drive Tray 2. Disk Tray Release Handle

2. If you are removing the disk while the system is powered up, wait at
least 10 seconds to allow the disk to stop spinning and the heads to
park before continuing with this procedure.

Figure 4-3 Hard Disk Tray Removal

4/2

3. Slide the tray out carefully until it is free of the chassis.

4. Place the assembly into suitable packaging.

NoteNote

Since the hard disk drives for your Apricot are exclusively SCSI drives, it is
important to note that the SCSI connector on the backplane of the drive module
contains the device address. This means that, for a given connector, any disk
drive that is fitted to that connector will have the same SCSI address.

Fitting a replacement drive

WarningWarning

The drive and tray require very accurate assembly or damage can be caused to the
connections. This is done in the factory using special equipment. Damage may be
caused by inaccurate assembly on site, which may invalidate your warranty.

1. Carefully unpack the new, ready assembled drive and tray from its
protective packaging.

◊ Avoid touching the electronic control board or the connectors at the

rear of the drive.

2. Ensure that the release handle on the tray is turned anti-clockwise as far
as it will go.

3. Insert the tray into the drive module and push it carefully in until it
reaches the point where the hard disk release handle will engage. You
must not knock or jolt the hard disk drive.

4. Turn the hard disk release handle clockwise almost one complete turn
until the tray metalwork is flush with the drive module. This procedure
plugs the hard disk into the connectors on the drive module backplane.

Hard disk drives and modules

Hard Disk Drive Module

The hard disk drive module is the removable metal framework which holds
up to four hard disk drives. The server’s disk chamber can accommodate up
to five of these modules. Removal of a module will usually only be necessary
if the circuit board on the module backplane fails.

NoteNote

You will need to ensure that both side panels are removed before attempting to
remove or fit a drive module.

Removing

1. Remove all hard disk drives which may be fitted to the module in
question (see “Hard Disk Drive, Removing”, earlier in this chapter).
Make a careful note of which drive tray is removed from which slot.

2. In the electronics chamber, unplug the data ribbon cable from the
connector on the back of the module. The connector is visible through
an opening in the centre spine.

CautionCaution

It is vital that you remember the exact cable and connector arrangement of your
hard disks, particularly if you are using a RAID (Redundant Array of
Independent Disks) configuration. If you fail to restore the arrangement so that
all cables and plugs are as they were originally, you risk losing all the data on
your hard disks.

4/3

Hard disk drives and modules

2

2

1

Figure 4-4 Unplugging the Ribbon Cable from a Module

1. Hard Disk Module Data Connector 2. Ribbon Cable

1

2

NoteNote

One of the connectors, located underneath the cooling fan assembly, is less accessible
than the others. If it is difficult to unplug this connector in the electronics chamber, feed
the ribbon cable carefully through the centre spine opening. Then unplug the connector
in the disk chamber.

3. Remove the four securing screws, as shown in the following diagram:

1. Empty Disk Drive Module 2. Securing Screws

4. Slide the module gently out. You will feel a little initial resistance as the
backplane power connector unplugs from its socket on the centre spine
of the server.

Figure 4-5 Removing a Drive Module

4/4

Hard disk drives and modules

Hard Disk Drive Module Backplane

The backplane on a hard disk drive module consists of seven small circuit
boards which are fastened with screws to the metal framework and
connected to each other by a flexible ribbon cable. The following illustration
identifies the various boards on the backplane:

1

5

Removing

3

2

4

Figure 4-6 Hard Disk Drive Module Backplane

1. Removable Media Drive SCSI

4. Data Connector Board

Interface Board

2. Hard Disk Drive Boards 5. Fastening screws

3. Power Distribution Board

There are two fastening screws for each board except the removable media
drive SCSI interface board, which has four. To remove the backplane:

1. Remove all disk drives from the module.

2. Remove the fastening screws from all the boards.

3. Push each of the boards, except the data connector board, towards the
interior of the module and manoeuvre it as necessary until it can be
freed from the framework.

4. Lift the backplane away.

Fitting

1. Manoeuvre the boards of the backplane through the back openings into
the interior of the framework so that they can be positioned properly.

2. Fasten all the boards to the module framework as shown in the previous
diagram.

4/5

Hard disk drives and modules

Jumper Settings for the Removable Media SCSI Interface Board

Each module backplane contains a removable media SCSI interface board,
positioned at the top of the module. However, the removable media drives
are now controlled on a SCSI cable direct from the motherboard.

There are two jumpers on the interface board, as shown in the following
diagram:

ENABLE

1

2

3

DISABLE

4

Figure 4-7 Removable Media SCSI Interface Board

1. SCSI Connector 3. Jumper J1

2 Interface Board 4. Jumper J2

Both jumpers, J1 and J2, must be in the correct positions for the system to
work properly, according to the following instructions:

♦ J1 determines whether a delayed spinup occurs in this module. Delayed

spinup means that the installed drives will not start spinning
simultaneously after you switch the server on. Instead, the drives start
one at a time with a specific number of seconds between each one. This
delay prevents the excessive power drain that would otherwise occur if
all drives started at the same instant. Therefore, this jumper should
always be in the enabled position.

♦ J2 determines where the SCSI bus terminates. Set it to the disabled

position. It will only ever need to be enabled if the removable media
drive bay has to be controlled from this individual SCSI bus.

Refitting the drive module

1. Slide the drive module into place as far as it will go, at the same time
guiding the data connector through the opening in the centre spine.

2. Now reach inside the module and push gently on the power circuit
board on the backplane to ensure that its connector is seated properly
into the power socket on the centre spine.

4/6

Hard disk drives and modules

The power circuit board lies in the centre of the backplane in each module as
shown in the following diagram:

2

1

3

3. Now use the four screws to fasten the module to the subsystem
metalwork in the drive chamber.

2

1

2

Figure 4-8 Fitting Drive Module

1. Empty Disk Drive Module 2. Securing Screws

4/7

Hard disk drives and modules

4. In the electronics chamber, plug the appropriate ribbon cable onto the
data connector on the backplane of the drive module:

1

2

Figure 4-9 Plugging the Ribbon Cable to a Module

1. Hard Disk Module Data Connector 2. Ribbon Cable

CautionCaution

It is vital that you remember the exact cable and connector arrangement of your
hard disks, particularly if you are using a RAID (Redundant Array of
Independent Disks) configuration. If you fail to restore the arrangement so that
all cables and plugs are as they were originally, you risk losing all the data on
your hard disks.

4/8

Front panels and drives

5 FRONT PANELS AND DRIVES

WarningWarning

Read completely the instructions detailed in chapter 3 at the beginning of the
service section.

Front Bezel

Removing

1. Ensure that the removable media drive bay door is closed and locked.

2. On each side of the server, remove the protective metal plates which
cover the removable media drives and the electronics chamber.

3. Remove any hard disk drive module close to the front of the machine.
For detailed information see previous chapter.

4. Remove eight screws, four on each side of the machine, and slide the
bezel away from the chassis as shown in the following diagram:

1

2

COMPACT

Cassette

Drive

Open/Close

SLOT-4

DC

Write Protect

Step

Figure 5-1 Removing Front Bezel

1. Front Bezel 3. Securing Screws (x 8)

3

2. Front Panel System Controller
Connector

5. The front panel is attached to the bezel and comes away from the
chassis at the same time. Since there is a ribbon cable attached to the
front panel, remove the bezel with care.

6. Reach behind the bezel and disconnect the ribbon cable from the front
panel.

5/1

Front panels and drives

Fitting

1. Ensure that any hard disk drive module close to the front of the
machine is removed.

2. Plug the ribbon cable into the connector on the front panel.

3. Fit the bezel onto the chassis and connect the eight screws, four on each
side of the server, as shown in the following diagram:

1

2

COMPACT

Cassette

Drive

Open/Close

SLOT-4

DC

Write Protect

Step

3

Front Panel

Removing

5/2

Figure 5-2 Refitting Front Bezel

1. Front Bezel 3. Securing Screws (x 8)

2. Front Panel System Controller
Connector

1. With the front bezel removed and the ribbon cable disconnected from
the front panel, remove the circlip from the top hinge of the removable
media drive bay door (which should be closed and locked).

Figure 5-3 Removing the circlip

2

1

Front panels and drives

2

1

1. Circlip 2. Top Hinge of Drive Bay Door

2. Gently press down on the metal plate to detach it from the hinge as
shown:

Figure 5-4 Detaching the Hinge

1. Metal Plate 2. Hinge

5/3

Front panels and drives

2

2

1

3

3

3. Now remove the two screws as shown:

Figure 5-5 Removing Front Panel Supporting Metalwork

2

1

1. Front Panel Supporting
Metalwork

4. Slide the supporting metalwork out of the bezel.

5. Remove the eight screws which fasten the front panel onto the
metalwork:

Figure 5-6 Front Panel Securing Screws

1. Front Panel 3. Metal Protrusion Holes

2. Securing Screws

2 Securing Screws

6. Remove the front panel.

5/4

Fitting

1

2

Front panels and drives

1. Attach the front panel to the supporting metalwork by means of the
eight screws as shown:

2

3

1

2

Figure 5-7 Front Panel Securing Screws

1. Front Panel 3. Metal Protrusion Holes

2. Securing Screws

NoteNote

Be sure to fit the two securing holes, marked ‘3’, over the small metal protrusions
in the metalwork.

2. Insert the front panel framework into the bezel as shown:

3

Figure 5-8 Fitting Front Panel Supporting Metalwork

1. Front Panel Supporting Metalwork 2. Securing Screws

3. Fasten the framework onto the bezel using the two screws.

4. Attach the top hinge of the removable media drive bay door to the front
panel supporting metal work you just fitted.

5/5

Front panels and drives

2

1

3

5. Fit the circlip into the hinge as shown in the following illustration:

Figure 5-9 Fitting Circlip

1. Circlip 2. Top Hinge of Drive Bay Door

2

1

Removable Media Drives

To gain access to the removable media drives and the System Management
Controller (SMC) you must first remove the protective metal plate which
covers this area.

Figure 5-10 Removing Protective Metal Plate

1. Securing Screws 3. Hard Disk Subsystem

2. Protective Metal Plate

1. Remove the securing screws.

2. Use the finger holes near the top left and right-hand corners to lift the
plate away from the server.

5/6

Removing

3

COMPACT

1

2

Front panels and drives

Each drive is attached to a drive tray, which is in turn secured to the drive
cage. To remove a tray from the cage:

1. Unplug the data and power cables from the rear of the drive. Unplug
the other end of the power cable from its socket on the centre spine.

2. Remove the two drive tray securing screws from the side of the cage.
The following diagram shows the screws for three of the drives:

2

1

3

Figure 5-11 Removable Media Drive Bay (Internal)

1. Drive Tray Securing Screws 3. Drive Data Cables

2. Drive Power Cables

3. Slide the tray carefully toward the rear of the cage until it is free from
the metalwork.

4. Turn the tray over and remove four screws from the underside.

Figure 5-12 Drive Tray Removal

1. Drive Tray 3. Securing Screws

2. Drive Assembly

5/7

Front panels and drives

5. Lift the tray away from the drive.

Fitting

Your server is equipped with a tray and a blanking plate for each empty drive
bay.

1. Remove the blanking plate, if necessary, from the drive tray. The plate
is attached via two screws on the underside of the tray.

2. Fasten the drive onto a drive tray using the four securing screws as
shown above. The tray allows for a small amount of adjustment. Align
carefully, if the drive is too far forward it may prevent the front panel
door from closing.

3. Turn the drive upright, slide it into the drive cage and secure it to the
cage using the two screws.

4. Connect the power cable to the back of the drive and the other end to
the socket on the centre spine.

5. If you are fitting a SCSI drive, you will need to connect it to the bus
cable which is attached to any other SCSI removable media drives that
are present.

NoteNote

When fitting SCSI devices, the unit ID must be set so as not to conflict with any
other SCSI device already in the system. It is advisable to keep a secure written
record of all devices, IDs and their function/position.

5/8

6 SYSTEM MANAGEMENT

CONTROLLER BOARD AND FAN

WarningWarning

Read completely the instructions detailed in chapter 3 at the beginning of the
service section.

Although some of the board is hidden behind the cooling fan assembly, all of
the fixing screws and cable connections are easily accessible.

System management controller (SMC)

Removing

1. Take careful note of where each connection is from and unplug three
ribbon cable connectors, the power connector, three fan connectors,
two thermistor connectors and one keylock sensor cable connector as
shown in the following diagram:

6

SMC and fan

5

3

1

4

2

Figure 6-1 System Management Controller Board

1. Power Connector 4. Keylock Sensor Connector

2. Fan Connectors 5. Securing Screws

3. Thermistor Connectors 6. Ribbon Cable Connectors

6/1

SMC and fan

2. Remove the two screw lock posts on the 25-way SMC serial port

2

1

Figure 6-2 SMC Serial Port Screw Lock Posts

connector which is visible on the server’s back panel:

Fitting

1. Screw Lock Posts 2. Back panel

3. Remove the seven fastening screws and lift the board out of the
machine.

1. Feed the 25-way serial port connector through the opening in the back
panel.

2. Fasten the board to the centre spine using the seven screws as previously
removed.

3. Fasten the two screwlock posts into place at both ends of the 25-way
connector on the back panel.

4. Plug the ribbon cables, power cable, fan and associated thermistor
cables and the keylock sensor cable into their respective connectors on
the SMC board as shown in the previous diagram. Ensure the ribbon to
the front panel is returned to the top left connection.

CautionCaution

Ensure the ribbon cables from the front panel and the PSU are in their correct
positions or damage will be caused to the SMC board.

Against each fan connector on the board there is a graphic which indicates
which fan cable should be plugged in:

6/2

Top Middle Bottom

The middle and bottom fans in this series are located below the SMC board
in the disk subsystem area.

System Controller Cooling Fan Assembly

1

2

Removing

1. Unplug the top fan connector on the SMC board (see fan connector
graphic in “System Management Controller Board, Fitting”).

2. Remove the two securing screws for the fan assembly, found on the
back panel as shown:

1

2

SMC and fan

Figure 6-3 SMC Cooling Fan Securing Screws

1. Securing Screws 2. Back panel

3. Tilt the top of the assembly slightly towards the interior of the server (if
it hasn’t already) and lift it upwards to free it from the chassis.

Figure 6-4 SMC Fan Assembly

1. Tab Slots 2. Metal Tabs

6/3

SMC and fan

Fitting

1. Fit the assembly so that the two metal tabs at the bottom are inserted

2. On each side of the assembly there is also a smaller tab which fits into a

3. While holding the assembly in place, fasten it with the two screws on

4. Connect the fan cable to the top connector on the controller board.

Against each fan connector on the board there is a graphic which indicates
which fan cable should be plugged in:

Top Middle Bottom

into corresponding slots. The assembly will then have a natural tilt
towards the interior of the server.

corresponding slot in the chassis. Squeeze the sides gently until the tabs
fit into the slots.

the back panel of the server.

For further information about dismantling the fan sub-assembly, see the
following chapter, which provides detailed instruction on the rest of the
internal system fans.

6/4

7 COOLING FANS

WarningWarning

Read completely the instructions detailed in chapter 3 at the beginning of the
service section.

Hard Disk Drive Cooling Fan Assembly

You can remove and fit the hard disk drive cooling fan assembly without
disturbing the adjacent disk drive module.

Removing

1. Unplug the middle and bottom fan connectors and their associated
thermistor connectors from the SMC board as shown:

Cooling fans

2

1

Figure 7-1 SMC Fan and Thermistor Connectors for Middle and Bottom Fans

1. Middle & Bottom Fan
Connectors

2. Push the power and thermistor cables down through the cut-out in the
corner of the metal work behind the top fan assembly.

2. Associated Thermistor Connectors

7/1

Cooling fans

1

2

3

2

3. Remove two screws which fasten the fan assembly to the chassis:

Figure 7-2 Removing the Hard Disk Cooling Fan Assembly

2

1

1. Securing Screws 2. Finger Grip

Fitting

4. Use the finger grip to slide the assembly towards you.

1. Slide the assembly into position, remembering to feed the guide tabs
into the positioning slots as shown in the following illustration:

Figure 7-3 Refitting Hard Disk Cooling Fan Assembly

1. Positioning Slots 3. Securing Screws

2. Guide Tabs

7/2

Cooling fans

2. At the same time, feed the fan cables through the cut-out in the corner
of the metalwork above the assembly. These cables will need to be
plugged into their respective sockets on the SMC board.

3. Fasten the assembly to the chassis with the two screws.

4. Plug the bottom and middle fan connectors, together with their
associated thermistor connectors, in to the SMC board as indicated in
the following diagram:

2

1

Figure 7-4 SMC Fan and Thermistor Connectors for Middle and Bottom Fans

1. Fan Connectors 2. Thermistor Connectors

5. Check that all fan and thermistor connections are correctly orientated
before switching on and that all side panels are securely fitted.

◊ The SMC board is marked to show which fans plug in to which

socket:

Top Middle Bottom

7/3

Cooling fans

1

2 3

4

5

6

Motherboard Cooling Fan Assembly

Removing

1. Remove five screws on the side of the fan assembly.

2. Remove any support struts fitted across the motherboard.

3. Remove four more screws which fasten the assembly to the centre spine
of the server, as shown:

1

2

Figure 7-5 Removing Cooling Fan Assembly

1. Side Securing Screws 2. Centre Spine Securing Screws

4. Slide the assembly to the right and then towards you to disengage it.

5. Before removing the assembly entirely, unplug the ribbon cable from
the connector on the small power distribution panel between the
bottom and middle fans:

Figure 7-6 Connectors on Small Power Distribution Panel

1. Ribbon cable connector 3,4,5. Fan power connectors

2. Side panel lock connector 6. Temperature sensor

7/4

Fitting

1. Fit the fan assembly into the interior of the server enough to connect
the ribbon cable to the small power distribution board between the
middle and bottom fans. Ensure the clips are latched onto the
connector body.

2. Slide the assembly to the left into place and fasten it to the chassis by
means of four screws at the centre spine and five screws at the side.

3. Replace any card support struts across the motherboard.

Removing fan from assembly

These following instructions apply to all the fans in the server including any
described in other chapters.

Remove the four screws which hold the handguard onto the fan assembly
housing. This not only releases the handguard, but also the fan itself.

Cooling fans

3

Fitting

2

1

4

1

Figure 7-7 Cooling Fan Assembly

1. Securing Screws 3. Fan Assembly Housing

2. Handguard 4. Fan

CautionCaution

Before attempting to fit the fan onto the fan assembly housing, be sure to place
the fan into the assembly so that the air flow through it is from the front of the
server to the rear (see the arrow next to the electrical polarity marking on one
corner of the fan). If any fan is turned the wrong way around, it will seriously
reduce the overall cooling effectiveness and increase the risk of overheating.

1. With the housing upright, align one corner of the handguard with a
screw hole and insert a screw just a few turns.

2. While holding the handguard and screw in place, align the fan to the
other holes and insert a second screw.

3. In a similar way, align and fit the remaining screws. Tighten when all
are in place. Do not overtighten or this may damage the fan housing.

7/5

8 MOTHERBOARD

WarningWarning

Read completely the instructions detailed in chapter 3 at the beginning of the
service section.

This chapter details the removal and refitting of the Motherboard, additional
processor board and associated Power board. Each one has a separate
procedure.

System motherboard

Removing

1. Unplug all external cables and leads from the system back panel
connectors (i.e. serial, parallel, video, keyboard, mouse) on the
motherboard and from any expansion cards.

2. Remove the screws which secure the metal plate over the electronics
chamber. The screws are along the top and right edges of the plate as
shown in the following illustration:

2

Motherboard

1

Figure 8-1 Protective Metal Plate Over Motherboard

1. Protective Metal Plate 2. Securing Screws

CautionCaution

It is vital that you remember the exact cable and connector arrangement of your
hard disks, particularly if you are using a RAID (Redundant Array of
Independent Disks) configuration. If you fail to restore the arrangement so that
all cables and plugs are as they were originally, you risk losing all the data on
your hard disks.

8/1

Motherboard

3. Rotate the right edge of the plate slightly towards you and unhook the
left edge. Removing the plate uncovers the motherboard:

8

7

9

21

3

6

5

4

Figure 8-2 Motherboard in situ

1. Support/retaining strut 6. Busbars to Power supply

2. Termination/extra CPU card 7. SMIC card (bottom slot)

3. Aux. power connection 8. SMIC cable to power board

4. Hard Disk SCSI Cable 9. Power board connections

5. Remov. media SCSI cable

4. Remove six screws from the periphery of the subplate which surrounds
the serial, parallel and video connectors on the back panel of the server.

8/2

Motherboard

2

1

2

1

1

Fig 8-3 Rear subplate screws

1. Fixing screws 2. system rear panel

5. Now remove the System Management Interface Card (SMIC). Unplug
its ribbon cable, which is attached to the distribution board at the top
of the electronics chamber, using the ejector latches fitted to the
sockets.

Figure 8-4 SMIC cable release.

1. Cable retaining latches 2. Ribbon cable socket

6. Remove the termination board, or, if fitted, the metal strut which
supports the additional CPU card. There is a single screw on one end of
the strut with a hook on the other. Then remove the CPU card.

7. Remove and put in a safe place, any fitted expansion boards.

CautionCaution

All boards and assemblies should be placed on an antistatic surface or within an
antistatic container as they are removed from the server.

8. Unplug the DC power connectors. One from the power distribution
panel at the top of the electronics chamber, then the other from the
lower right hand side (direct from the PSU).

9. Unplug the data ribbon that connects to the power distribution panel.
Again, use the ejector latches.

10. Unplug the Floppy Drive connector.

8/3

Motherboard

11. Unplug the two SCSI interface cables from the connectors at the

12. Using an M5 socket, release the five busbar connections at the base of

13. Now remove 21 screws which secure the board to the centre spine of

bottom of the motherboard.

the motherboard.

the server, as shown:

Figure 8-5 Motherboard Securing Screws

CautionCaution

When refitting the motherboard, due to the very high operating frequencies of
modern systems, it is extremely important that all of the mounting screws are
refitted to ensure effective grounding to the server metalwork over the whole
board area.

Lift the motherboard gently off the support lug at the top right corner in the
electronics chamber and place on a suitable antistatic surface.

Ports sub-plate

If the motherboard is being replaced, the metal sub-plate supporting and
identifying the rear ports must be removed to be fitted to the new
motherboard.

Carefully remove the port fixing bolts and lift the plate clear.

8/4

3

4

Figure 8-6 Rear sub-plate assembly

1. Top right corner of m’board 3. Ports sub-plate

Motherboard

1

2

2. Ports on motherboard 4. Port mounting bolts

Fitting the Motherboard

1. Replace the six screws which secure the connector sub-plate, on the
back panel, to the server chassis.

2. Attach the motherboard to the centre spine of the server using the 21
screws as shown in the following illustration:

Figure 8-7 Motherboard Securing Screws

8/5

Motherboard

4. Reconnect the hard disk cable from the drive module to the appropriate

CautionCaution

It is vital that you remember the exact cable and connector arrangement of your
hard disks, particularly if you are using a RAID (Redundant Array of
Independent Disks) configuration. If you fail to restore the arrangement so that
all cables and plugs are as they were originally, you risk losing all the data on
your hard disks.

5. Plug the Floppy Drive and Front Panel cables into their respective

6. Plug the DC power cables into their respective connectors on the power

7. Replace the bus termination board or the additional CPU card (plus its

8. Replace any expansion cards and their appropriate ribbon cables.

connector as it was originally.

connectors.

distribution board at the top of the electronics chamber. These
connectors are keyed and cannot be plugged incorrectly. Do not use
force; you may be trying to plug a cable into the wrong connector.

support strut).

9. Replace the SMIC card in the lowest EISA slot and plug its cable into
the power distribution board at the top of the electronics chamber.
Ensure the plug is firmly fixed into the socket using the latches.

1

2

Figure 8-8 SMIC cable latch.

1. Cable retaining latches 2. Ribbon cable socket

10. Using a torque wrench set to 5 Nm, connect up and tighten the busbar
connections at the base of the motherboard.

11. Refit the auxiliary power supply cable to the lower right hand side
power connector.

12. Ensure all the processors and memory modules are refitted correctly.

8/6

13. Hook the left edge of the protective metal plate in place and secure the
plate to the server chassis using the screws along the top and right
edges.

14. Reconnect all cables and leads to the back panel port connectors.

NoteNote

You must always refit all protective metal plates. These plates, in addition to
providing protection for delicate components, contribute to an effective flow of
cool air through the machine.

Motherboard Power Distribution Panel

The motherboard power distribution panel fixed to the inner roof of the electronics
chamber and is positioned at right angles to the motherboard. The following
illustration shows the connectors and the eight securing screws on the board:

10

9

8

7

6

A A

A

Motherboard

2

1

A

3
4

Removing

A

5

A

A

A

Figure 8-9 Motherboard Power Distribution Panel

A. Securing Screws (x8)

1. Loudspeaker Connector 6. SMIC Card Connector

2. Motherboard connector 7. Power from motherboard

3. Fan Board Connector 8. Power from motherboard

4. Aux. power connector 9. Power to/from m’board

5. SMC connection 10. 3.3 v supply to m’board

1. Unplug all connectors on the panel, noting their position.

Fitting

NoteNote

You may have to remove the termination/additional CPU card to provide
enough working space to complete this procedure.

2. Remove eight securing screws and remove the panel.

1. Fasten the panel to the inner roof of the electronics chamber with the 8
screws.

2. Plug the various connectors into the board. Each connector is keyed so
that it cannot be plugged into the wrong socket.

8/7

Power boards and speaker

9 POWER BOARDS AND SPEAKER

There are two separate power distribution panels, one for hard disk drives
and one for Removable Media drives.

WarningWarning

Read completely the instructions detailed in chapter 3 at the beginning of the
service section.

Hard Disk Drive Power Distribution Panel

Removing

1. Remove the motherboard cooling fan assembly as detailed in chapter 8.

2. This uncovers three bus bars which are attached to the power
distribution panel, through a cut-out in the centre spine, and to the
power supply, as shown in the following illustration:

2

Figure 9-1 Bus Bars Connected to Hard Disk Power Distribution Panel

1. Bus Bars 2. Connections to Hard Disk Power
Distribution Panel

3. Detach the three bus bars from the distribution panel.

4. In the disk chamber, remove all hard disk drives and drive modules.

1

◊ Also, remove any blanking plates that cover empty disk chamber

space.

5. Remove 11 screws as shown in the following diagram and lift out the
panel.

9/1

Power boards and speaker

4

5

Fitting

2
1

Figure 9-2 Hard Disk Power Distribution Board

1. Power Distribution Panel 4. Removable Media Drives

2. Securing Screws 5. SMC Board

3 HD Cooling Fan Assembly

1. With all hard disk drives, drive modules and the motherboard cooling
fan assembly removed, attach the hard disk distribution board to the
centre spine of the server, in the disk chamber, using the 11 screws as
shown above.

3

9/2

2. Refit all the hard disk drive modules and drives.

CautionCaution

It is vital that you remember the exact cable and connector arrangement of your
hard disks, particularly if you are using a RAID (Redundant Array of
Independent Disks) configuration. If you fail to restore the arrangement so that
all cables and plugs are as they were originally, you risk losing all the data on
your hard disks.

3. Reconnect the bus bars in the electronics chamber.

NoteNote

You must use a torque wrench to tighten the bus bar bolts. The torque wrench
setting is 5 Newton metres (Nm).

4. Replace the motherboard cooling fan assembly.

Power boards and speaker

Removable Media Drive Bay Power Distribution Panel

Removing

1. In the electronics chamber, unplug two power cables as shown in the
following diagram:

Fitting

1

Figure 9-3 Removable Drive Bay Power Distribution Panel

1. Cable Connectors 2. Securing Screws

2. In the disk chamber, unplug the cables which provide power to the
removable media drives.

3. Now remove the six screws which fasten the power distribution board
to the centre spine and remove the board, as shown in the previous
diagram.

2

1. Fasten the power distribution panel onto the centre spine of the server
with the six screws as shown above.

2. Connect the two power cables as shown in the previous illustration.

3. In the disk chamber, reconnect the cables which provide power to the
removable media drives.

9/3

Power boards and speaker

1

2

Loudspeaker

Removing

1. Remove the motherboard cooling fan assembly as previosly detailed.

2. Unplug the loudspeaker cable from the connector on the motherboard
power distribution panel, as shown:

1

2

3

Figure 9-4 Loudspeaker Connector

1. Loudspeaker Connector 3. Cooling Fan Assembly

2. Power Distribution Panel

3. Remove the four screws which fasten the loudspeaker onto the front
drive bay door housing, as shown:

Figure 9-5 Loudspeaker

1 Loudspeaker Securing Screws 2 Removable Media Drive Bay

Fitting

9/4

1. Use the four screws to attach the loudspeaker to the front drive bay
door housing, as shown above.

2. Plug the cable into the loudspeaker connector on the motherboard
power distribution panel and

3. Refit the motherboard cooling fan assembly.

UPS and battery pack

10 UPS AND BATTERY PACK

WarningWarning

Read completely the instructions detailed in chapter 3 at the beginning of the
service section.

The UPS unit consists of the actual power supply and the accompanying
battery pack. The unit is very robust but is very heavy, approximately 35 Kg
including battery pack.

If you are going to remove the power supply, always do it as a single unit.
Do not remove the battery pack first. The unit is severely out of balance
without the battery pack and could unexpectedly roll over as you remove it.

WarningWarning

It is essential that you use the utmost care when removing the UPS in order to avoid
injury to yourself or damage to the unit. Do not attempt to remove or fit the unit
alone. There should always be at least one other person available to help you.

Before you begin, ensure that the server is in a suitable area with plenty of
work space. Then, use the jacking mechanism in the front castors to anchor
them firmly to the floor so that the server cannot roll about.

Figure 10-1 Front Castor Adjustment

1. Adjustment Wheel 2. Jacking Pad

1

2

10/1

UPS and battery pack

Removing

1. It is vitally important to ensure that the system is shut down, the
battery pack circuit breaker switch is in the Off position and the system
is disconnected from the mains electricity supply.

2. If necessary, remove some of the expansion cards to improve access to
the bus bars, which provide power to the motherboard. You may also
need to unplug some of the data cables which are connected to the hard
disk drive modules.

CautionCaution

It is vital that you remember the exact cable and connector arrangement of your
hard disks, particularly if you are using a RAID (Redundant Array of
Independent Disks) configuration. If you fail to restore the arrangement so that
all cables and plugs are as they were originally, you risk losing all the data on
your hard disks.

3. Remove the motherboard cooling fan assembly as detailed in chapter 8.

4. Detach two pairs of motherboard bus bars and remove the set of 3 bus
bars under the cooling fan assembly as shown in the following diagram:

1

Figure 10-2 Bus Bars

1. Motherboard Bus Bars 2. Bus Bars for Hard Disk Power
Distribution Panel

5. Make sure that there is enough clearance between the bus bars and their
power supply connections to allow the unit to slide freely.

◊ If there is not enough clearance, you will need to disconnect the other

ends of the busbars and remove them completely. Take a careful note
of each busbar and the position it was removed from.

2

10/2

UPS and battery pack

6. Unplug three cables, one ribbon, one 12-way and one 16-way, from the
power supply as shown:

1

2
3

4

5

Figure 10-3 Disconnecting Power Supply Cables

1. System Controller
Connector (Ribbon Cable)

2. Motherboard Auxiliary
Power (16-way)

3. Not used

4. Removable Media Drive Bay
Connector (12-way)

5. Cable Connector Group

10/3

UPS and battery pack

7. Loosen four floating fasteners, two on each side of the server, until they
are free of the power supply unit, as indicated in the following diagram:

2

1

Figure 10-4 Power Supply Floating Fasteners

1. Floating Fasteners 2. Front Bezel

8. Now remove six screws on the back panel of the server, as shown:

10/4

Figure 10-5 Power Supply Securing Screws

9. Using the handle on the battery pack, pull the unit carefully until it is a
little less than halfway out (about 30 cm), just before it begins to tip
towards you.

UPS and battery pack

WarningWarning

This Power supply is heavy. It is strongly advised to have a second person with
you to assist before you either fully remove the assembly from the server, or pick it
up to fit it into its position in the server.

10. The second person should assist you, on the opposite side of the unit,
from this point onwards.

11. Place your hands under the metal casing of the unit as indicated by the
arrows in the following illustration:

Fitting

Figure 10-6 Power Supply Removal

12. Slide the unit out slowly until it is free from its housing. Now rest the
unit on the floor. Do not drop it.

1. With the help of the second person on the opposite side, place your
hands underneath the power supply as indicated by the arrows in the
illustration above.

2. Now carefully slide the unit all the way into the chassis.

10/5

UPS and battery pack

3. Secure the unit to the chassis with the six screws as shown:

Figure 10-7 Power Supply Securing Screws

4. Now tighten the four floating fasteners, two on each side, located
towards the front of the machine:

2

1

10/6

Figure 10-8 Power Supply Floating Fasteners

1. Floating Fasteners 2. Front Bezel

UPS and battery pack

5. Plug the ribbon, 12-way and 16-way cables into their connectors on the
power supply.

◊ Note that these connectors are keyed and can only be fitted in one

position.

1

2
3

4

Figure 10-9 Connecting Power Supply Cables

1. System Controller
Connector (Ribbon Cable)

2. Motherboard Auxiliary
Power (16-way)

3. Not used

4. Removable Media Drive Bay

5. Cable Connector Group

5

Connector (12-way)

6. Attach two pairs of bus bars and fit one set of 3 bus bars as shown in
the following diagram.

◊ As with the cables, it should not be possible to fit these bars

incorrectly.

10/7

UPS and battery pack

1

Figure 10-10 Bus Bars

1. Motherboard Bus Bars 2. Bus Bars for Hard Disk Power

2

Distribution Panel

CautionCaution

The hardware used to hold the busbar connections must be tightened using a
torque wrench set to 5 Newton meters (Nm).

7. Fit the motherboard cooling fan assembly.

8. Refit any expansion cards you may have removed to improve access.

CautionCaution

It is vital that you remember the exact cable and connector arrangement of your
hard disks, particularly if you are using a RAID (Redundant Array of
Independent Disks) configuration. If you fail to restore the arrangement so that
all cables and plugs are as they were originally, you risk losing all the data on
your hard disks.

UPS Battery Pack

The UPS is equipped with a replaceable battery pack. It will provide electric
power for your system for a specific period of time, depending on how many
hard disks or other devices are installed. Use the SMA at any time to find out
the exact battery life remaining (see the SMA User’s Guide for more details).

Do not attempt to remove the power supply if the battery pack has already
been removed, as it will cause a serious imbalance, the battery pack can

however be removed as an individual component.

10/8

Removing

UPS and battery pack

Important - WarningImportant - Warning

The battery pack contains lead acid batteries. In the EEC the directive
91/157/EEC (plus subsequent amendment 93/86/EEC) designates batteries
containing lead to be handled as a dangerous substance.

Similar regulations will apply in other countries.
The battery pack must only be removed by a qualified electrician and must

not be disposed of in domestic waste.

1. Remove the fastening screws as shown in the following diagram:

Figure 10-11 Battery Pack Fastening Screws

2. Pull the battery pack handle carefully and slide out slowly until the
pack hits a ‘stop’. The following power connector will then be visible:

Figure 10-12 Unplugging the Battery Pack Power Connector

3. Gently pull the connector apart as indicated.

4. Now with a slight lift, you can remove the battery pack clear. (There is
a further ‘end-stop’ to prevent the battery pack’s rear end falling out.)

10/9

UPS and battery pack

Fitting

1. Make sure that the battery pack power connector is visible and
accessible.

2. Carefully lift the battery pack over the ‘end-stop’ and slide it far enough
into the chassis to reconnect the battery pack power connector.

Figure 10-13 Plugging the Battery Pack Power Connector

3. Push the pack the rest of the way into the chassis, lifting slightly to pass
over the ‘stop’.

10/10

Figure 10-14 Refitting the Battery Pack

4. Use the screws as shown in the previous diagram to secure the battery
pack.

APRICOT FT4200

Section Three

Technical information

and Appendix

10

8

6

7

9

2

1

A A

A

5

A

A

A

A

A

3
4

Technical information

11 TECHNICAL INFORMATION

OVERVIEW

This section contains technical information about your Apricot under the
following topics:

Topics covered Chapter

Section layout 11

Functional Architecture

Memory

Central Processing Unit

Motherboard 12

Switches and Jumpers

I/O Connectors and Headers

System Management Interface Card (SMIC) 13

System Management Controller

Power Distribution Boards 14

Uninterruptible Power Supply

Diagnostic Codes and Fault Messages 15

Antistatic precautions Appendix

11/1

Technical information

Functional Architecture

Your server’s functional divisions consist of the following:

♦ Motherboard
♦ System Management Controller
♦ Front Panel
♦ Uninterruptible Power Supply (UPS)
♦ Hard Disk Drives and Removable Media Drives
♦ Motherboard Power Distribution Board

The following block diagram indicates the relationship of these divisions to
each other:

Disk Drives

Motherboard

2 × CPU on
board

2 x CPU on
additional card

2 × Memory
banks

Peer bus PCI
Onboard VGA
Parallel Port
Serial Port
FDC

3 × 5.25-inch Half-Height Bays 1 × 3.5-inch Floppy Disk Drive
Hard Disk Drives = 5 HDD Modules, 4 Bays per Module

1 to 5 SCSI Busses

6 × PCI Slots
4 × EISA Slots
(one shared card bay)
2 × Onboard SCSI

controllers

SMIC
Plug-in ISA Adapter

Card
Interface to SMC

Serial Communication

System
Management
Controller

Front Panel
Switches, LEDs
LCD & IR
Sensor

Side Panel
& Door Locks

Temperature
Sensor

Fan Alarms:
3 in Electronics
Chamber, 3 in
Hard Disk
Chamber

Motherboard Power Distribution Board

Loudspeaker amplifier
Signal marshalling for SMC

11/2

Power to Motherboard

Standby Supply to System Controller
AC & Battery Monitoring
Power ON/OFF Control

Uninterruptible Power Supply

Integral Batteries
Isolator switch

Description

Technical information

The architecture of your server supports symmetrical multiprocessing (SMP)
and a variety of operating systems. The server is equipped with both PCI
(Peripheral Component Interconnect) and EISA (Extended Industry
Standard Architecture) busses. The standard removable media bays can
house a variety of storage devices, such as tape backup or CD-ROM. One

3.5-inch floppy drive comes with every server.

The System Management Controller (SMC) monitors your system and
reports problems. The methods that the SMC uses to communicate the
status of the system are as follows:

♦ Hexadecimal codes sent to the Front Panel liquid crystal display (LCD)
♦ Audible beep codes and alarms
♦ Detailed information is available in the System Management

Application, a Windows software program specially designed for the
server. This application, which you can run on another computer
remotely (via modem, serial, or network link), alerts you if there are
problems such as component failure, overheating, security breaches and
power failures.

General

The SMC communicates with the motherboard by means of the System
Management Interface Card which occupies the lowest EISA slot.

The 1-kilowatt Uninterruptible Power Supply (UPS) provides power for the
server during short breaks. It has its own removable battery pack, but is also
removable as a complete assembly.

Dimensions

Height Including castors 750 mm.

Excluding castors 670 mm.

Length 790 mm.

Width 410 mm.

Weight Max (with 20 drives) 115Kg.

Incl. packing 140Kg.

Temperature

Operating 0o to 50o C

Storage (In suitable packaging) -40

o

to 70o C

Airflow 200 CFU

A gap of at least 15 cm must be allowed clear around the server to allow for
adequate air circulation.

11/3

Technical information

Memory

Server memory is located in two memory slot areas on the motherboard.
Fully loaded, these provide 2 Gbytes of common high-speed memory for the
server. Each group can hold 1,2, or 4 ECC Dual In-line Memory modules
(DIMMs.) All DIMMs in a bank must be the same. There are advantages in
fitting two or four DIMMs into any bank as two way and four way
interleave become available. Full details of the memory population rules can
be found with other relevant information in chapter 2.

Interleave scheme

Interleave BANK ONE BANK TWO

1 way Socket

2 way Socket

4 way Socket

Read perfomance

No. of

DIMMs in a

bank

four 4 : 1 14:1:1:1 11:1:1:1 8:1:1:1 194 Mb/s

two 2 : 1 14:2:2:2 11:2:2:2 8:2:2:2 152 Mb/s

one 1 : 1 14:4:4:4 11:4:4:4 8:4:4:4 107 Mb/s

The above is based upon 60ns DRAM and a system clock of 66 Mhz.

Write performance

No. of

DIMMs in a

bank

2

2+4

2+4+6+8

Interleave Page miss

+Precharge

Interleave Page miss

+precharge

1

Socket

1+3

Socket

1+3+5+7

Socket

Page miss Page hit Page hit burst

data rate

Page miss Page hit

11/4

four 4 : 1 10 7 7

two 2 : 1 11 8 8

one 1 : 1 16 13 13

The above is to memory of complete cache line.

Full details of the type of memory modules supported can be found in
section 1, chapter 2, which deals with memory upgrades and other related
topics.

The ECC function detects and corrects single-bit errors from DRAM
(Dynamic Random Access Memory) in real time, allowing your system to
function normally. It detects all double-bit errors but does not correct all of
them, it also detects all three-bit and four-bit adjacent errors in a DRAM
nibble but does not correct them. When one of these uncorrected errors
occurs, the ECC memory card generates an NMI (NonMaskable Interrupt)
and usually halts the system.

Memory Map

Address Range (hex) Amount Function

0000,0000 – 0003,FFFF 256 KB Base system memory (fixed)

0004,0000 – 0007,FFFF 256 KB Base system memory (fixed)

0008,0000 – 0009,FFFF 128 KB Base system memory or ISA memory

Technical information

The server supports both base (conventional) and extended memory. Base
memory is located at addresses 00000h to 9FFFFh (the first 640 Kbytes).
Extended memory begins at address 100000h (1 Mbyte) and extends to the
limit of addressable memory (2 Gbytes).

Some operating systems and application programs use base memory, e.g.
MS-DOS, OS/2, and UNIX. Other operating systems use both conventional
and extended memory, e.g. Windows and Windows NT. MS-DOS does not
use extended memory, however, some MS-DOS utility programs such as
RAM disks, disk caches, print spoolers etc., use extended memory for better
performance.

enabled in Setup

000A,0000 – 000B,FFFF 128 KB ISA video DRAM

000C,0000 – 000E,FFFF 192 KB Off board video BIOS (can be

shadowed) AIC-7870 SCSI BIOS (can
be shadowed)

000F,0000 – 000F,FFFF 64 KB ISA memory, system BIOS (fixed)

0010,0000 – 00EF,FFFF 14 MB System memory or unused

00F0,0000 – 00FF,FFFF 1 MB System memory or EISA/ISA memory

0100,0000 – 3FFF,FFFF 1008 MB System memory or unused

4000,0000 – BFFF,FFFF 1024 MB EISA memory or I/O slave memory

C000,0000 – C1FF,FFFF 32 MB Memory mapped math coprocessor

C200,0000 – FEBF,FFFF 944 MB EISA memory or I/O slave memory

FEC0,0000 – FEC0,0FFF 4 KB I/O APIC #1

FEC0,1000 – FEC0,1FFF 4 KB I/O APIC #2

FEC0,2000 – FEC0,2FFF 4 KB I/O APIC #3

FEC0,3000 – FEC0,3FFF 4 KB I/O APIC #4

FEC0,4000 – FFDF,4FFF 32752 KB EISA memory or I/O slave memory

FFE0,0000 – FFFF,FFFF 32 KB EISA (BIOS/ECU)

11/5

Technical information

Central Processing Unit

The server’s first two CPUs are located on the motherboard. The
motherboard has two type 8 ZIF sockets to become either a single or a dual
processor board. There is a further additional card which can hold two more
identical processors that can be fitted into a socket at the top of the
motherboard. If this board is not fitted there is a termination board in its
place. All four processors must be the same.

The system provides a high-performance symmetric multiprocessing (SMP)
environment. In SMP, all processors are equal and have no preassigned tasks.
Distributing the processing loads between more than one processor increases
system performance. This is particularly useful when application demand is
low and the I/O request load is high. In the SMP environment, processors
share the same interrupt structure and access to common memory and I/O
channels.

Each processor contains its own internal L2 cache memory.

The processor power-up configuration logic provides the motherboard BIOS
with information about its CPU speed, the presence of numeric coprocessor,
cache size, cache line size and snooping policy.

Features

♦ One to four Pentium Pro processors with bus/core speed ratios enabling

upgradable operation.

♦ Compatible Intel proprietary bus interface providing support for:

◊ 64-bit data bus
◊ Bus level symmetrical multiprocessing

◊ Back-off to allow concurrency in system
♦ Address and data bus parity
♦ Data path control allowing pipelining of read and write data through a

separate data path ASIC

11/6

12 MOTHERBOARD

Motherboard layout

21

22

23

24

20

Motherboard

1

2

3

19

18
17
16

15

14

4

5
6

7

8

13

Figure 12-1 Motherboard details

1. Slot for CPU/termination card 13. Busbar connections to PSU

2. VRM8 socket for processor ‘B’ 14. EISA expansion sockets

3. DIMMs 1 to 4 (top to bottom) 15. PCI expansion sockets

4. ZIF socket for processor ‘B’ 16 BIOS recovery links

5. ZIF socket for processor ‘A’ 17 Replaceable CMOS Lithium battery

6. DIMMs 5 to 8 (top to bottom) 18. Clear CMOS links

7. VRM8 socket for processor ‘A’ 19. System external connections

8. Aux power socket (from PSU) 20. Data connection to power dis. board

9. UltraSCSI (to 1st HDD module) 21. Bus and multiplier switches, SW1-1 to 6

10. Aux. busbar connec. to PSU (not used) 22. FDD mode setting links

11. SCSI connec. for Remov. media drives 23. Floppy disk control connector

12. Busbar connections to PSU 24. Power connections to power dis. board

12

11

10

9

12/1

Motherboard

Expansion Slots

EISA Slots

The four EISA bus slots on the motherboard provide for expansion and
performance enhancement. One of these shares a common chassis I/O
expansion slot with one of the PCI slots. If you use this for an EISA slot, you
cannot use it for PCI.

The EISA bus, an extension of the Industry Standard Architecture (ISA) bus,
provides:

♦ 32-bit memory addressing
♦ Type A transfers at 5.33 Mbytes per second
♦ Type B transfers at 8 Mbytes per second
♦ Burst transfers at 33 Mbytes per second
♦ 8-, 16-, or 32-bit data transfers
♦ Automatic translation of bus cycles between EISA and ISA masters
♦ Interrupt sharing

NoteNote

Since EISA is fully backward compatible with ISA, you can install old or new
ISA add-in boards and software in your server.

PCI Slots

The six PCI bus slots on the system board provide for expansion and
performance enhancement. There are two on-board PCI controllers.

PCI bus one and two both provide:

♦ 32- and 64-bit memory addressing
♦ +5 V signalling environments
♦ +3 V supply arrangements
♦ Burst transfers at 133 Mbytes per second
♦ 8-, 16-, or 32-bit data transfers
♦ Plug-and-play configuration
♦ PeerBus to maximise throughput

NoteNote

If plug in SCSI controllers are to be connected, they must be fitted in the lowest
PCI slot on the motherboard to avoid boot-up conflicts with the on-board
controllers.

Video Controller

The on-board, integrated Cirrus Logic GD54M30 super VGA controller has
a direct 32 bit PCI interface. The standard system configuration comes with
1 Mb of video memory.

The SVGA controller supports only analogue monitors (single and multiple
frequency, interlaced and non-interlaced) with a maximum vertical retrace
interlaced frequency of 87 Hz.

12/2

I/O Map (continued overleaf)

I/O Address(es) Resource

0000 – 001F DMA controller 1
0020 – 0021 Interrupt controller 1
0022 – 0023 EISA bridge configuration space access ports
0024 – 0025 AIP configuration space access ports
0026 – 0027 Configuration Space Access Ports
0040 – 005F Programmable Timer
0060, 0064 Keyboard Controller
0061 NMI Status & Control Register
0070 NMI Mask (bit 7) & RTC Address (bits 6:0)
0071 Real Time Clock (RTC)
0080 – 008F DMA Low Page Register
0092 System Control Port A ( PC-AT control Port)
00A0 – 00BF Interrupt Controller 2
00C0 – 00DF DMA Controller 2
00F0 Clear NPX error
00F8 – 00FF x87 Numeric Coprocessor
0102 Video Display Controller
0170 – 0177 Secondary Fixed Disk Controller (IDE)
01F0 – 01F7 Primary Fixed Disk Controller (IDE)
0220 – 022F Serial Port
0238 – 023F Serial Port
0278 – 027F Parallel Port 3
02E8 – 02EF Serial Port 2
02F8 – 02FF Serial Port 2
0338 – 033F Serial Port 2
0370 – 0375 Secondary Floppy
0376 Secondary IDE
0377 Secondary IDE/Floppy
0378 – 037F Parallel Port 2
03B4 – 03BA Monochrome Display Port
03BC – 03BF Parallel Port 1 (Primary)
03C0 – 03CF Enhanced Graphics Adapter
03D4 – 03DA Colour Graphics Controller
03E8 – 03EF Serial Port
03F0 – 03F5 Floppy Disk Controller
03F6 – 03F7 Primary IDE - Sec. Floppy
03F8 – 03FF Serial Port 1 (Primary)
0400 – 043F DMA Controller 1, Extended Mode Registers.
0461 Extended NMI / Reset Control

Motherboard

12/3

Motherboard

I/O Address(es) Resource

0462 Software NMI
0464 Last EISA Bus master granted
0480 – 048F DMA High Page Register.
04C0 – 04CF DMA Controller 2, High Base Register.
04D0 – 04D1 Interrupt Controllers 1 and 2 Control Register.
04D4 – 04D7 DMA Controller 2, Extended Mode Register.
04D8 – 04DF Reserved
04E0 – 04FF DMA Channel Stop Registers
0678 – 067A Parallel Port (ECP)
0778 – 077A Parallel Port (ECP)
07BC – 07BE Parallel Port (ECP)
0800 – 08FF NVRAM
0C80 – 0C83 EISA System Identifier Registers
0C84 Board Revision Register
0C85 – 0C86 BIOS Function Control
0CF8 PCICONFIG_ADDRESS Register
0CFC PCICONFIG_DATA Register
n000 – n0FF EISA Slot n I/O Space
x100 – x3FF ISA I/O slot alias address
n400 – n4FF EISA Slot n I/O Space (n = 1 to 15)
x500 – x7FF ISA I/O slot alias address
n800 – n8FF EISA Slot n I/O Space (n = 1 to 15)
x900 – xBFF ISA I/O slot alias address
nC00 – nCFF EISA Slot n I/O Space (n = 1 to 15)
xD00 – xFFF ISA I/O slot alias address
46E8 Video Display Controller

EISA Slot Assignments

EISA Slot (hex) Device

0 System board
1-8 EISA expansion boards
9-A Embedded SCSI
B Memory module
C Memory module (expansion module)
D Primary PCI segment
E CPU1 module
F CPU2 module

12/4

Direct Memory Access Channels

Channel Device

0 (add-in board)
1 (add-in board)
2 Diskette drive
3 Reserved
4 Reserved
5 (add-in board)
6 (add-in board)
7 (add-in board)

ISA Interrupts

Device Interrupt

NMI Parity error

Motherboard

0 Interval timer

1 Keyboard buffer full

2 Reserved, cascade interrupt from slave PIC

3 Onboard serial port B (COM2), if enabled

4 Onboard serial port A (COM1), if enabled

5 (EISA Ethernet when fitted)

6 Onboard diskette (floppy) controller, if enabled

7 Parallel port LPT1, if enabled

8 Real-time clock (RTC)

9 SCSI (e.g. additional 2940 when fitted)

10 (RAID controller cards when fitted)

11 (PCI Ethernet when fitted)

12 Onboard PS/2 mouse port, if enabled

13 Math coprocessor error

14 Reserved for SMIC

15 Reserved for SMIC

12/5

Motherboard

Jumper and switch settings

All of the following settings should not normally be changed.

BIOS recovery (Identified at 16 on motherboard diagram)

Pins Pins Action

1-2 Recover

2-3 Normal

Clear BIOS settings (Identified at 18 on motherboard
diagram)

Pins Pins Action

1-2 Normal

3-4 > 1 sec. discharge

Floppy drive mode (Identified at 22 on motherboard
diagram)

Pins Pins Pins

1-3 2-4 3-mode operation (Japan only)

3-4 Normal 2-mode operation

SW1 - Bus and clock multiplier settings

External bus clock Processor bus multiplier

Frequency SW1-5 SW1-6 SW1-1 SW1-2 SW1-3 SW1-4 Factor

66Mhz off on on on on on x2

60Mhz on off on off on on x2.5

50Mhz on on on on off on x3

on off off on x3.5

on on on off x4

12/6

All other switch combinations are reserved.

WarningWarning

Do not alter the processor or clock settings under normal operation unless
upgrading all the fitted processors. It could result in permanent damage to either
the motherboard or the processors.

Bus connections and ports

On-Board SCSI Controllers

The system board includes two Adaptec controller chips, channels A and B,
interfacing directly to the second PCI bus.

SCSI bus A

Controlled by an on-board Adaptec AIC7850 having integrated single ended
SCSI drivers for direct connection to an 8 bit fast (10Mhz) bus. Bus
connection is via a 50 pin header. This is a provision for direct control of
devices such as SCSI CD-ROM or Tape drives fitted in the front, removable
media, drive bay.

SCSI bus B

Controlled by an on-board Adaptec AIC7880 similar to the above, but for
connection to either fast (10Mhz) or ultrafast (20Mhz) bus. Bus connection
is via a 68 pin ‘P’ type connector. This is a very high specification device
aimed at UltraSCSI hard drives.

In both cases the Adaptec SCSI bus is incorporated into the motherboard
BIOS. Both bus systems have active termination, the power supply for which
is protected by a 1A resettable fuse. This in turn is monitored by the system
management cards.

Motherboard

Active negation outputs reduce the chance of data errors by actively driving
both polarities of the SCSI bus and avoiding indeterminate voltage levels and
common-mode noise on long cable runs. The SCSI output drivers can
directly drive a 48 mA, single-ended SCSI bus.

Power Connections

The main power input to the motherboard is via two sets of 5v. connections
at the bottom of the board. These are designed to be fitted with supply
busbars direct to the Power Supply Unit (PSU) located in the bottom of the
server. The PSU functions as an Uninteruptable supply, having a battery
back up in case of mains interruptions or failure, allowing the system to shut
down in a predescribed and orderly manner.

All the other required voltages for add-in EISA/ISA boards, PCI boards, and
the system board are supplied through the auxiliary connector on the lower
right side of the motherboard. All power connector pins are rated at 5
amperes. In addition there are connections at the top of the motherboard for
the supply to the Power Distribution board, which in turn, returns a 3.3 v.
supply required by system logic.

Floppy disk

There is a standard floppy disk interface provided at the top of the
motherboard. This will normal be ribbon cabled to the removable media
drive bay and the 3.5 inch floppy drive. The system can boot from this drive.

12/7

Motherboard

51

6

9

10101

Parallel Port

The parallel and video connectors share a common housing. When viewed
on the rear panel, the parallel port is on the right.

Pin Signal Pin Signal

1 Strobe 10 ACK (acknowledge)

2 Data bit 0 11 Busy

3 Data bit 1 12 PE (paper end)

4 Data bit 2 13 SLCT (select)

5 Data bit 3 14 AUFDXT (auto feed)

6 Data bit 4 15 Error

7 Data bit 5 16 INIT (initialise printer)

8 Data bit 6 17 SLCTIN (select input)

9 Data bit 7 18-25 GND (ground)

Serial Ports

13

25

1

14

Figure 12-2 Parallel Connector

These identical PS/2 compatible connectors share a common housing. When
viewed on the rear panel, COM2 is on the left and COM1 is on the right.

Pin Signal Pin Signal

1 DCD (data carrier detect) 6 DSR (data set ready)

2 RXD (receive data) 7 RTS (request to send)

3 TXD (transmit data) 8 CTS (clear to send)

4 DTR (data terminal ready) 9 RIA (ring indicator)

5 GND (ground)

Figure 12-3 Serial Port

12/8

VGA Video Port

6
4213

5

5
3

1

2

4

6

When viewed on the rear panel, the video port is on the left.

Motherboard

Pin Signal Pin Signal

1 Red 10 GND (ground)

2 Green 11-12 NC (not connected)

3 Blue 13 HSYNC (horizontal sync)

4 NC (not connected) 14 VSYNC (vertical sync)

5-8 GND (ground) 15 NC (not connected)

9 NC (not connected)

5

10

15

1

6

11

Figure 12-4 VGA Video Connector

Keyboard and Mouse Connectors

These identical PS/2 compatible connectors share a common housing. When
viewed on the rear panel, the keyboard connector is on the left and the
mouse connector is on the right.

Keyboard Mouse

Pin Signal Pin Signal

1 KEYDAT (keyboard data) 1 MSEDAT (mouse data)

2 NC (not connected) 2 NC (not connected)

3 GND (ground) 3 GND (ground)

4 FUSED_VCC (+5 V) 4 FUSED_VCC (+5 V)

5 KEYCLK (keyboard clock) 5 MSECLK (mouse clock)

6 NC (not connected) 6 NC (not connected)

Figure 12-5 PS/2-Compatible Keyboard and Mouse Connectors

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