Discussion about the Korg PolySix synthesizer

If IC22 pin 10 to IC32 pin 10 tests OK for continuity, and either of 
these tests OK to pin 8 of IC25, then either that trace is being held high 
by a short, IC25 has failed in such a way to pull the signal high, or 
IC22's !WR signal is possibly dead.

Crow
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On Mon, 15 Sep 2003, petercaja wrote:

> Hi Everybody!
> 
> I have a problem with my PolySix regarding saving patches.
> There are already some presets in SRAM, but i'm unable to overwrite 
> it. I checked KLM-367 board and it seems that WriteEnable signal, 
> from IC22, Pin 10 never goes to 0, to enable writing to SRAM
> i doble checked it with Mutimeter and Logic Analyzer.
> Since SRAM acctualy holds presets, i doubt this chip (IC32) is bad.
> 
> When i press Write the LED blinks, and when i choose program to write 
> to - LED stops blinking, as it should, but the program is not 
> overwritten.
> 
> There was a battery leakage, but previous owner fixed it.
> I also checked those fixed connections and everything seems to be ok.
> 
> It seems that everything else is working OK.
> 
> Any suggestions are welcome!
> 
> Thank you and best regards,
> Peter