Discussion about the Korg PolySix synthesizer

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.

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.