Vintage Synth Repair

tmp80c49? As far as I know you can use any type of
8049 brand such as a D8049 there are usually some on
ebay.

Phil.

 
--- inocencio66 <paulo.simoes5@...> wrote:

> --- 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\ufffds a large electronics store in Lisbon that
> sells vintage parts. 
> Maybe they still got a tmp80c49 at a vintage price.
> I\ufffdm going there 
> right now.
> 
> Cheers!
> 
> Paulo.
> 
> 
> 
> 



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