Discussion about the Korg PolySix synthesizer

Hola-
having repaired about a dozen of these & sent them back out into the
world, my advice is to check ALL the data and address lines.
What I've done is to make myself a chart (using the schematic for
reference -- and you might want to get hold of Old Crow's corrected
schematic);
I have a list of ALL the IC pins & connector pins that contact D00,
D01, etc;  then get my continuity tester & check each one, down the
list.  It's amazing how easy it is (when repairing a battery-damaged
board) to miss some pins -- or short them;  shorted data or address
lines can cause all kinds of merry havoc.
Also, one point of interest that some people overlook when repairing
acid-damaged boards is the connector pins (down at the board level,
inside the plastic housing) -- I've seen several of these that were
broken, which causes intermittent or missing contact to the front
panel and/or voice board.

In short, just be thorough & take your time.

Good luck.

~GMM
--- In PolySix@yahoogroups.com, "toorglick" <toorglick@y...> wrote:
> So, I jumped all of the traces from IC30 as well, so that makes ICs 
> 30 and 31 as well as R17 completely jumped.  I have jumps from 
> several traces around where the battery sits to various places on the 
> board.
> 
> Here's what I experience.  Patches 1 - 4 work.  The rest don't.  
> Manual works.  
> 
> I can't select a waveform, it's stuck on the variable pulse 
> waveform.  I can turn the sub-osc on and off and select the range. 
> Changing the resonance alters the pitch of all notes.  While I can 
> change the rate, depth, and delay of the LFO, I can't get it *not* to 
> modulate something (yes, the wheel is all the way forward).  The 
> envelope section seems to be partially available.
> 
> Since I've rewired and quadruple-checked the wiring of ICs30 & 31, I 
> can't imagine those are causing me my woes.  Right?  I've checked 
> continuity now on all traces in the the battery section of the board 
> and from the connectors along the top of KLM367.  Where am I not 
> looking to rememdy what remains the problem.
> 
> Please help.