PolySix PCB

[Fraser, Colin J]

I don't know if you'll have any luck finding a whole new board.
These boards are probably the biggest point of failure in the P6, so any
spares will surely have found new homes by now.

I repaired a friend's Poly 6 in which the battery had leaked (of
course..) and the memory chip was also a dud.
I couldn't find a RAM chip of the same type, so I fitted a new socket,
and plugged a daughter-board into the socket with a 8k SRAM ship on it.
This works fine, and gives the possibility of adding a bank select
switch externally to allow increased patch storage.

It took me ages to fix this keyboard. I had to jumper a load of circuit
traces to get the thing working, and I also had to scrub the board clean
to remove the remnants of the battery leakage so that it didn't continue
to eat traces after the repair.
Moral of the story - even if you're certain you've fixed everything, you
may find something else has gone.
If you don't get lucky and find a new board - I'd recommend you keep at
it unless you're certain the processor is dead. You may eventually get
it working, and if you do - it'll be worth it...

If you don't get it working - how about using the 6 SSM2044 filters and
SSM2056 envelope generators as the basis of your home-built modular ;-)

Colin f



> -----Original Message-----
> From:	brun at unix1.bART.nl [SMTP:brun at unix1.bART.nl]
> Sent:	Monday, October 13, 1997 1:12 PM
> To:	analogue-digest at hyperreal.com; synth-diy at horus.sara.nl
> Subject:	PolySix PCB
> 
> I've given up. The leaking battery of my Korg PolySix seems to have 
> destroyed more than just the PCD-traces: either the processor or the 
> memory chip is also broken.
> 
> So!
> 
> Here it is:
> 
> Where can I get a whole new computerboard for my PolySix? I'm looking 
> for PCB number KLM 367A. It's the one that has all the control and 
> memory logic on it, and houses the battery. BTW, I live in Holland 
> and am a bit low on cash...
> 
> Bye,
> 
> Jeroen