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A reasonably clean Acorn A3010.
But were going to make it alot better.
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A view from the rear of the case showing expansion connectors and
blanking plate in podule position.
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To remove the top cover, first remove the 3 screws from the underside
of the computer.
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Once removed the top cover can be lifted upwards but be careful
where it unclips at the rear. Its a bit tight and care will be required
to make sure you dont crack the case.
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A difficult operation this, but grip each keyboard ribbon in turn
at each end and pull them up out of there sockets.
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The keyboard can now be lifted away from the main case. When you
lift away, feed the connector ribbons through the slot in the metal casing.
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Undo the cap-head screw under the power supply with an allen-key(hexagon
wrench).
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Remove the 2 screws at the front of the metal casing, these secure
the chassis to the case.
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The chassis can now be slid forward approx a quater of an inch,
then lifted upwards to release it from the case.
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To seperate the 2 halves of the chassis, undo the hexagon bolt,
front centre, the top half of the chassis can be slid forwards to unclip
it.
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As you lift the top chassis up, disconnect the power and data ribbons
from the Floppy drive, also the small lead that goes to the Speaker.
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The disk drive is seperated by removing the 4 securing screws on
the underside of the top-chassis.
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To remove the mainboard you will need to first undo all the small
hexagon bolts on the rear connectors, also the locking ring on the Audio
out.
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The mainboard can then be slid forward and lifted clear after unplugging
the mains cable from the Power supply area of the Mainboard.
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This is the mainboard with dust still attatched. Clean it with
a small paintbrush and a vacuum cleaner hose. Be careful not to damage
anything.
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The completed mainboard, looking factory fresh. Whilst its out
the machine take a second or two to make sure the main OS ROMS are pushed
fully home.(2 large IC's bottom right)
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Unclip the lid of the Floppy disk drive, and as before use a brush
and vacuum hose to remove all dust and hair.
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Clean the case with damp cloth. Use NO detergents,abrasive or chemical
cleaners. Do not use nail varnish remover as it will MELT your case.
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A dusty keyboard unit ready for a clean.
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Firstly, work from the back. Unclip the metal backing plate by
undoing the clips. Work from 1 end to the other.
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With the backing plate removed the keyboard membrane is exposed.
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Lifting away the membrane reveals all the dust. At this stage pick
out the LED's and store them safely.
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The keys are now removed by pulling slightly on the keys and unclipping
from the rear. Its a tedious job but worth it in the end.
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All the component parts of the keyboard. Dust everything, wipe
the membrane with a damp cloth. And wipe all the keys. They will come up
like new.
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To re-assemble, first fit the LED's. Remember the yellow one goes
top left (lower), all the rest are green.
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Next place the Membrane onto the board. Slide it left/right/up/down
and you will feel it locate itself.
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Next place the Metal backing plate on top. There are some locating
dowels, just press down from one end to the other to snap it back together.
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Finally replace the keys. Just put them back in there respective
holes and pressing down will give a short "click" to say there locked in
place.
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All the component parts of an A3010 cleaned and ready for final
assembly.
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Assembly is the reverse of above. Fit the mainboard, do up the
bolts. Fit the floppy drive to the top chassis. reconnect speaker and floppy
cables and clip chassis together. Do up bolt.
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Place chassis in lower case. Slide to the rear to lock. 2 front
screws and 1 under PSU. Refit the lid by securing at rear first, then lower
and do the 3 screws underneath.
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The final Assembly powered up and looking just like new. Probably
3 hours work total.
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