TOG chips Re: [sdiy] Chinese MG-1s??!?

[Richard Atkinson]

On Apr 30 2008, Scott Gravenhorst wrote:

> If you're looking to repair a broken vintage synth that contains TOG ICs, 
> I think #2 is doable, I believe someone here has tested a CPLD (or 2) and 
> others have suggested PIC or other microprocessor. However, you can still 
> run into problems interfacing a modern device into and older design 
> because of differences in expected voltages - adding to the cost.
>
> The key is to find a single programmable digital device large enough to 
> handle the hundreds of flipflops inside the TOG. This will determine 
> minimum the number of devices required to emulate the original TOG. This 
> and the fact the field programmable devices (CPLD, PIC, etc) require a 
> programmer affect the cost.

I'm about to start work on a Godwin String Concert which has non-working 
D#/Eb keys. I'm dreading the prospect of having to replace the TOG chip, 
and hoping for some sort of miracle such as a dry joint or a duff capacitor 
etc. All four of the keys (in each octave) don't work, at all footages.

Anyone know which TOG chip the Godwin String Concert uses?

Richard