Cumana CA012 User manual

I NSTALLATION
INSTRUCTIONS
BBC A3000
MEMORY
UPGRADE
CA011 (1MB)
CA012 (4MB)
CUMANA LIMITED
Pines Trading Estate,
Broad Street,
Guildford,
Surrey GU3 3BH England
Tel: [phone] Telex: 859380
Fax: [phone]
® Cumana is a registered trademark
All registered trademarks are acknowledged

* * * * Please note that fitting this
memory upgrade may invalidate your
warranty. It is suggested that this
upgrade should be installed by your local
service agent to maintain warranty of the
system. * * *
Before dismantling your A3000 please read
the following instructions carefully:
Disconnect computer from all
peripherals and the mains supply.
REMOVING THE TOP COVER
FROM THE COMPUTER
a.) Place the computer keyboard side down:
Carefully remove the centrally located
screw which can be found directly in
front of the serial number label:
b.) Turn the computer so that you can work
on the back (Repositioning the computer
keyboard side up:) On each end of this
rear face are two fixing screws which
hold the top cover clips in place:
Remove these screws, washers and
square spacers: (The square spacers are
seated in between the top cover clips and
the computer:)
c.) The two plastic top cover clips are now
free: Whilst pressing the clips in towards
the computer, gently raise the cover by
5cm at the rear, thus allowing the clips
out of their guides:
d.) Gently raise the front edge of the top
cover to release the front lugs from their
recesses: The top cover should now be
free and easily removed:
DO NOT HINGE THE LID FROM THE
REAR AS THIS WILL RESULT IN
BREAKING THE FRONT RETAINING
LUGS.
INSERTING THE MEMORY BOARD
a.) Lift the keyboard off its mounts, and
move it towards the front of the machine,
approximately 10-15mm: Care must be
taken to avoid damaging the
interconnecting cable:
b.) The memory board has three connectors,
check that they are all in a straight line:
c.) Locate the pin connectors marked "ram
expansion" which is situated between the
keyboard and disk drive on the A3000
motherboard: The memory board will
only fit one way: Carefully align the
board with the pins and using little
pressure locate the board onto the pin
connectors: Once aligned, press firmly
and evenly so that the board lowers
squarely into place:
d.) Reposition the keyboard onto its guides:
REPLACING THE TOP COVER
a.) Insert front lugs, then carefully align the
top cover ensuring that the plastic clips
are in their guides: Refit the square
plastic spacers behind the clips, insert
the screws with their washers and
tighten:
b.) Turn the computer keyboard side down:
Replace the centre screw and tighten:
TESTING
a:) Reconnect the system and power on: The
sign on message should read RISC OS
2048K on the 1MB version and RISC
OS 4096K on the 4MB version:
The system is now ready for use: