Discussion about the Korg PolySix synthesizer

Hi Andy

Thanks for your help!  


> I would go back and check the tracks and function of the 
> logic at IC29 and IC34. Pay special attention to the control lines 
> P24 and P24. The track from the CPU port to this pin runs directly 
> along the area where the battery leaks! 


I checked control lines P24 and P25 from CPU pins 35 and 36 to pin 5
of IC29 and IC35 (is this what you were referring to?), and there were
a few ohms of resistance, so I jumpered them.  No improvement though...


> These two chips are 4042 quad 
> CMOS latches, so testing them might require the use of a logic probe.


Unfortunately I don't have a logic probe - just a scope and DVM here...


> Once you have verified this is working OK, then we can move onto the 
> effects processor board, but not until!
> 
> Let us know how you get on and if you need any further help!


I think I need further help already! :-)  Can this be diagnosed
without a logic probe?

Cheers
Frank