Yamaha CS80

Hi all.

I'm finishing up fixing an ill 4VS. I've got it pretty much working and
added CV/Gate inputs to SEM 1-3. The last thing I need to do it clean
some of the keyboard contacts. How the hell do you get the keyboard
assembly out and get to the contacts????? I feel kind-of dumb, but
there's got to be an easier way that disassembling the who thing!

Thanks much,

David

Hi Dave,

You need to remove the screws underneath and sides of the case and lift the
whole thing out and case then remove the keyboard.

-----Original Message-----
From: David Rogoff
Sent: Sunday, May 01, 2011 4:56 AM
To: yamahacs80@yahoogroups.com
Subject: [yamahacs80] (OT) Oberheim 4-Voice question

Hi all.

I'm finishing up fixing an ill 4VS. I've got it pretty much working and
added CV/Gate inputs to SEM 1-3. The last thing I need to do it clean
some of the keyboard contacts. How the hell do you get the keyboard
assembly out and get to the contacts????? I feel kind-of dumb, but
there's got to be an easier way that disassembling the who thing!

Thanks much,

David


------------------------------------

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Kent

Tel: +44 (0)20 8873 2044

Touch Digital Controllers Ltd
London, UK.

Email: info@...
Website: www.touchdigitalcontrollers.co.uk

Associated: www.rlmusic.co.uk
Associated: www.leanintothelight.wordpress.com/

> David Rogoff <mailto:cs80@...>
> April 30, 2011 7:11 PM
>
>
> Hi all.
>
> I'm finishing up fixing an ill 4VS. I've got it pretty much working
> and added CV/Gate inputs to SEM 1-3. The last thing I need to do it
> clean some of the keyboard contacts. How the hell do you get the
> keyboard assembly out and get to the contacts????? I feel kind-of
> dumb, but there's got to be an easier way that disassembling the who
> thing!
>
> Thanks much,
>
> David
> ------------------------------------------------------------------------
>
> David Rogoff <mailto:david@...>
> April 30, 2011 8:56 PM
>
>
> Hi all.
>
> I'm finishing up fixing an ill 4VS. I've got it pretty much working
> and added CV/Gate inputs to SEM 1-3. The last thing I need to do it
> clean some of the keyboard contacts. How the hell do you get the
> keyboard assembly out and get to the contacts????? I feel kind-of
> dumb, but there's got to be an easier way that disassembling the who
> thing!
>
> Thanks much,
>
> David
> ------------------------------------------------------------------------
>
> Kent spong <mailto:kent_spong@...>
> May 1, 2011 12:28 AM
>
>
> Hi Dave,
>
> You need to remove the screws underneath and sides of the case and
> lift the
> whole thing out and case then remove the keyboard.
>

Thanks Kent. Yes - it's the 6 screws on the bottom and the screws that
hold the handles to the back. Then there's 6 screws in the metal bottom
that hold down the keyboard assembly.
Found something interesting - and badly designed - when I got in there.
There's a circuit board that hold the keyboard scanning chips. It hangs
upside-down from the metal from of the Pratt-Reed keyboard assembly.
It was held on in four places with ... glue! Which, of course, after
30+ years, had lost its grip, leaving the board dangling by its wires :(
A trip to the hardware store for some 5-minute epoxy, and it should be
good for another 30 years!

David


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