Vintage Synth Repair

>bump<

any luck with this, LOTS?

--- In vintagesynthrepair@...m, "duncan" <ferrograph@...> wrote:
>
> >>Duncan, 
> I tried your suggestion, swapping out the U13 chip with one from another working mm+ but the problem remained. Any other suggestions?<<
> 
> U57, which is a 40174 latch on the demux board. it's the only other place where those signals & ONLY those signals are one one chip.
> 
> what threw me off its scent in the first place is that I assumed (NEVER assume with an MM!) that the same demux & latch would light the panel indicators. looks like it doesn't. 
> 
> there'll be a good reason for that, no doubt, but I haven't time to read the rest of the schemo now..... :-(
> 
> let me know how you get on.
> 
> d.
>