Vintage Synth Repair

--- In vintagesynthrepair@yahoogroups.com, Philip <eggwheatis@...> 
wrote:
>
> I read your post about the diode...you can't measure
> diodes reliably in circuit...sure you can do a quick
> check but to be sure it is faulty you need to lift one
> leg out of the circuit. 
>
> There was probably nothing wrong with it.

Yes, that occurred to me, but these diodes d17...d29 are all in open 
circuits, and their respective switches tested ok. On the pcb they also 
reside between the cpu and the wires going to the other boards, which 
can be easily disconnected to do the measuring. 

> I did say you are in logic probe/scop territory and
> without those you are working blind.
>
>
> Phil.

Yes, I now "see" it.
There´s a large electronics store in Lisbon that sells vintage parts. 
Maybe they still got a tmp80c49 at a vintage price. I´m going there 
right now.

Cheers!

Paulo.