Acorn Computers Limited A4000 User manual

1
Acorn A3020 and A4000 Econet
module installation
instructions
Introduction
Applicable models
These instructions explain how to install an Econet module into the
Acorn A3020 and A4000.
Parts required
An Econet module upgrade kit (AEH52).
Tools required
A Pozidriv No. I screwdriver (or similar).
Packing list
The kit should contain the following items:
• AnEconet module printed circuit board (PCB)
• An Econet cable
• An Econet label
• A3020 and the A4000 Econet Module installation instructions(this
document)
• An Acorn Registration card
• A Guarantee card.
If any of these items is missing or damaged, please contact your
supplier immediately.
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2
Fitting the kit
Fitting the kit
Any modification or upgrade carried out to the printed circuit board. (
PCB) of any Acorn equipment is undertaken at the sole risk of the
person carrying out the modification or upgrade.
Acorn Computers Limited cannot accept any liability for damage
caused to the product during installation of internal upgrades,
whether or not carried out in accordance with the instructions in
this document.
Before commencing an upgrade, please read all of the instructions
carefully. If you do not feel confident to carry out this upgrade, please
take the upgrade kit and your computer to an Acorn Computers
authorised dealer, who will install it for you. A charge may be levied by
the supplier for installing the upgrade kit; such a charge shall be entirely
at the discretion of the supplier concerned.
Static electricity
IMPORTANT: Most electronic devices can be damaged by static
electricity. To reduce the possible adverse effects of static electricity
note the following points when installing any component(s) or upgrade:
• avoid working in areas where there are man-made fibres, such
as nylon carpets and nylon clothing
• after the computer is disconnected from the mains, touch the
metalwork of the case while performing the upgrade to ensure
that you and the computer are at an equal potential
• avoid touching the pins of the PCB during fitting.

3
Acorn A3020 and A4000 Econet module installation instructions
Disassemble the computer
A3020
To remove the top cover of the A3020, follow the instructions in
Appendix E: Inside the computer in the Acorn A3020 Welcome Guide.
Note that the only screws you need to unscrew to remove the top
cover are those marked with the symbol shown here.
A4000
To remove the top cover of the A4000, follow the instructions in
Appendix E: Inside the computer in the Acorn A4000 Welcome Guide.
Installing the Econet module
These Econet fitting instructions apply to both the A3020 and the
A4000 computers.
1 Remove the Econet module PCB from its packaging. Be careful
to avoid touching the pins.
2 Check that all pins are straight. If any appear crooked or
splayed, please contact your supplier.

4
Fitting the kit
The Econet module PCB should be positioned as shown in Figure 1:
Fitting the Econet module:
1
1
Figure 1: Fitting the Econet module
Make sure that
• the pins of PL1 on the Econet module are aligned with the
corresponding holes in socket SK13 on the main PCB
• the pins of PL2 on the Econet module are aligned with holes 11
to 15 in socket SK l6 on the main PCB.
Note that the remaining holes of socket SK16 are not used.
When you are satisfied that all the pins are correctly aligned, press
the Econet module PCB gently into place.
Take care not to exert too much pressure when pressing home the
Econet module PCB; this may lead to damage of the various connectors.

5
I
Acorn A3020 and A4000 Econet module installation instructions
Reassemble the computer
A3020
Reassembly is explained in Appendix E: Inside the computer in the Acorn
A3020 Welcome Guide. Check all connections have been made securely.
Stick the Acorn Econet label above the Econet connector, and connect
the Econet cable to the Econet connector. (Note that the cable only
fits one way round.) The locations of these are shown in Figure 2:
The back of the A3020:
Figure 2: The back of the A3020
Econet connector label position

6
Fitting the kit
A4000
Reassembly is explained in Appendix E: Inside the computer in the Acorn
A4000 Welcome Guide. Check all connections have been made securely.
Stick the Acorn Econet label above the Econet connector, and connect
the Econet cable to the Econet connector. (Note that the cable only
fits one way round.) The locations of these are shown in Figure 3: The
back of the A4000:
Figure 3: The back of the A4000
Setting the station number
The computer is now ready to be connected to an Econet network.
Before attempting to log on to an existing Econet network, see your
Network Manager who will assign and set your station number.
Guarantee
The guarantee on this upgrade is identical to that for your computer,
with the exception that the guarantee period starts from the date of
installation of the upgrade. and covers the upgrade only.

7
Acorn A3020 and A4000 Econet module installation instructions

8
Fitting the kit
POZIDRIV is a trademark of European Industrial Services Ltd.
Econet is a trademark of Acorn Computers Ltd.
Copyright © 1992 Acorn Computers Limited
Published by Acorn Computers Limited
Part number 0494,204
Issue 1, September 1992