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A grubby looking BBC Acorn A3000 ready for restoration to its former
glory.
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Firstly at the rear, slacken the 2 screws and slide out the locking
plates (downwards).
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Undo (1) screw in the centre of the base.
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Press tabs at rear of lid "inwards" then raise rear. You will also
have to ease the front of the case free by pressing tabs in the 3 slots
on the underside.
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Grip carefully at both ends and remove each of the 2 Keyboard Ribbons
by pulling upwards. The keyboard will the lift off.
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Unplug all connectors to the mainboard (noting there positions
for re-assembly). Also unplug the 2 stereo speakers and remove them.
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Remove the floppy drive unit by unscrewing the 4 screws found on
the underside of the case.
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By pressing in the middle of the Power Supply Label you will
feel a square hole. Make 3 cuts to reveal access to a deeply recessed screw.
Undo to remove the PSU lid.
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Remove 3 screws securing mainboard (centre,centre left and bottom
left). The lift the PSU and mainboard away. (after unplugging mains cable
and earth strap)
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Clean the Mainboard using a small paintbrush and a vacuum cleaner.
The difference is noticable in the photograph. Just like new underneath.
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Clean all other components using Vacuum or damp cloth method. Keyboard
cleaning is described in full in the Acorn
A3010 section.
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Re-assemble is the reverse of the steps above.
Lovely and clean. Ready to accept keyboard.
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Keyboard fitted. To fit the Keyboard ribbons, hold each end of
the ribbon and press firmly into connectors. Its a tight squeeze but unless
youve got giant hands you should do it ok.
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Main case back on and powered up.
Job well done.
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