Date   : Mon, 27 Nov 2006 22:38:29 -0000
From   : faz@... (neil f)
Subject: Master Keyboard t/shooting

 



Chances are it's one of the links back to the keyboard header
area. I can't remember which keys are in which group off hand
but it's likely your dead ones all have a common line somewhere
and that line will consist of a number of links and tracks as it
threads it's way back to the top of the keyboard. If you can
work out which line the keys are on you can run a wire direct
down to each key in turn to isolate where the break lies -
probably a dry join somewhere.  I hacked the number keypad of a
Master keyboard up a while back to fit the keyboard into a Beeb
case and it was surprising how many links had to be remade with
wire jump leads before all the keys were working again.

-Neil F.


> -----Original Message-----
> From: bbc-micro-bounces+faz=nildram.co.uk@...
> [mailto:bbc-micro-bounces+faz=nildram.co.uk@...
] On Behalf Of bbc
> Sent: Monday, November 27, 2006 10:02 PM
> To: bbc-micro@...
> Subject: [BBC-Micro] Master Keyboard t/shooting
> 
> Hi all - Got my hands on my first BBC Master (shipped from the
UK to 
> Aus). However, seems like the keyboard is DOA.
> 
> The I, J, N, U and M keys are not working at all (and I
suspect one of 
> the F keys is dead as well).
> 
> I've stripped the keys off, air-brushed the dust-bunnies out,
and 
> hosed the whole keyboard and switches with good quality
contact 
> cleaner. This got a few sticky keys working properly, but not
the 5/6 
> non-reactive ones.
> 
> Seeing this grouping is too close to be coincidence, could
this mean a 
> dead line/track on the board? Any suggestions on how to locate
it 
> (preferably easy suggestions :-)
> 
> Or is it just not worth the hassle, and I'm better off
sourcing 
> another keyboard (difficult - rare as hens teeth in
Australia).
> 
> (btw - battery pack replaced, but I can't config the unit just
yet 
> until I can type the correct CONFIG commands!)
> 
> Thanks.
> 
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