Discussion about the Korg PolySix synthesizer

It can be found here

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?jameco_page=42&langId=-1&productId=43238&catalogId=10001&freeText=43238&storeId=10001&search_type=jameco&ddkey=http:StoreCatalogDrillDownView




--- In PolySix@yahoogroups.com, "Andrew Jury" <andy@...> wrote:
>
> Hi,
> 
> First check the continuity for the tracks around the data bus (DB0-DB7)
> connected to IC22 (CPU) and IC30/31/26/34.
> 
> However, I have had just such a problem in the past and it was 
> corrected by replacing the SRAM chip IC32 which is a 1024x4bit type. 
> The original TC5514APLs are a bit thin on the ground, however, you can 
> use an HM6514 which is still available if you look around. Having read 
> past posts it seems not uncommon for this to fail! If you are going 
> change any integrated circuits I find it is best to solder in a DIP 
> socket before you reconnect the new device. This will help you in the 
> future with troubleshooting and it will also protect you against 
> destroying the device with heat when soldering.
> 
> If you have trouble getting hold of the above chip let me know and I 
> will try and point you in the right direction.
> 
> Bests,
> Andy
> 
> --- In PolySix@yahoogroups.com, "wasteking1" <wasteking1@> wrote:
> >
> > my polysix has had a few 367 corrosion problems but after some 
> rewiring 
> > it now has all leds and switches working ,(it used to have 5 led's on 
> > all the time and wouldnt switch sounds)  
> >     BUT NOW THE PROBLEM IS new sounds wont stay in the memory... if 
> you 
> > store a sound on lets say B2  then go and store another on C3 you 
> loose 
> > the first sound.  Any suggestions as to which chips, or traces  are 
> > involved with memory input?  could the 'memory enable' switch not be 
> > actually working ? any ideas?
> >
>