Vintage Synth Repair

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.

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

Phil.


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

> Replaced the diode but the problem remains. Even
> replaced ic7, ic8 and 
> ic10, but nothing. It all leads to a faulty cpu
> chip. I didn\ufffdt want to 
> go to the neighbourhood shop where they can scan the
> cpu activity since 
> the guys there are not into synths, just tv repair
> work, but there\ufffds 
> nothing more I can do. Unless anyone here knows of
> more clues to 
> diagnose the problem.
> 
> Paulo.
> 
> 



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