> i've heared that the keyboard membrane often breaks,
>on the old 48 k speccies it broke just above the connector
>on the PCB, i cured that by cutting off the membrane about 2 cm or
>so above the break and putting it back in the connector (this worked on
>about 8 spectrums)
>
>you could try using a multimeter to find the break, then repair it with a
>'silver conductive pen'

Cutting the ribbons wont really work as they are insulated except for the
bit that
plugs into the connector.  The breaks are most likely to happen at the fold
where the
ribbon meets the main membrane area... and conductive paint / pen is the
only way to fix them easily.

(Although I had one membrane in which there was a fault at the connector
end - cleaning it
with a PCB copper / edge connector cleaner and applying some conductive
paint did the trick, but the as i said, the breaks are more likely at the
fold)

> or someone here once mentioned that you can buy new membranes somewhere!

Nope... there is no where to get new membranes so conductive paint is the
only
way to attempt to fix them.

Colin P.
====
Quazar: Hardware and Software for the Sam
http://www.quazar.clara.net/sam/




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