Discussion about the Korg PolySix synthesizer

Hi,

I can confirm that I have fitted the 'clone' board to both Polysix with old
and new production KLM366 with no changes required. Can someone remind me
again what the problem is with the KLM366 in this particular Polysix. You
really need to troubleshoot these sort of problem in a linear fashion,
starting at the keyboard and ending up with the D/A converter ladder and the
CV out, etc. If you get no gate control (no LEDS) then try putting your
finger on the mask ROM and seeing if it is cold/warm/scorching. If either,
apart from the middle, then you might want to investigate a replacement. If
you are really stuck send me a private message and I might be able to fix
the board for you by return of post.

See ya,
Andy


On 23/03/2012 21:35, "Jed Jorgensen" <jed.jorgensen@gmail.com> wrote:

> I have no experience with an old production P6 either. Andy -- have any of
> the ones you've worked been the old production units?
> 
> Jed
> 
> On Fri, Mar 23, 2012 at 6:47 AM, backshall1 <backshall1@bellsouth.net>wrote:
> 
>> **
>> 
>> 
>> I have never seen an old production KLM366/KLM396 before, but there is no
>> "old production" KLM367A, so they must be the same in both machines. The
>> clone is exactly the same, so it should work just like the original.
>> According to the schematic diagram, IC9 is a TL072 and IC1 is 74LS04. It
>> looks like IC3 is the CD4011.
>> 
>> Don B.
>> 
>> _____
>> 
>> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf
>> Of
>> del_poolp@hotmail.com
>> Sent: Friday, March 23, 2012 2:51 AM
>> To: PolySix@yahoogroups.com
>> Subject: [PolySix] Re: Keyboard Problem (key assigner)
>> 
>> 
>> You do not have an idea for my problem ?
>> The equivalent for IC9 is TL072 and IC1 is a CD4011 (CMOS NAND GATES)?
>> 
>> --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ,
>> 
>> del_poolp@... wrote:
>>> 
>>> Hi,
>>> I have a P6 (old production) with KLM367A clone.
>>> P6 Boot correctly, but the keyboard do not work.
>>> The keyboard hardware work with another P6 (new production).
>>> 
>>> Question :
>>> KLM367A Clone board is compatible with P6 old production ?
>>> 
>>> On this photo
>> (
>> http://www.themeloon.net/wp-content/uploads/2012/03/IMG_20120310_111435.jpg
>> ) the IC1 and IC9 is physically poor (no text, and pin is black). How to
>> test this IC ?
>>> 
>>> Thanks,
>>> Richard
>>> 
>>> PS : Sorry for my english, and i'm not a really electronics engineer just
>> a handyman sunday ;)
>>> 
>> 
>> [Non-text portions of this message have been removed]
>> 
>>  
>> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
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