Discussion about the Korg PolySix synthesizer

Hello p6ters

I have a new chapter...

1) The Key assigner problem is gone (was not a Key assigner problem!).
2 short circuiting cables connecting the keyboard to the klm366 were
the culprit.



The synths works perfectly in Manual mode, but if I select a memory
patch, I get always the same stupid sounds.
Every time, I create a new sound and I save it (memory enable) if I
reselect it, the sound is gone!

I tried many times to load sounds from TAPE (computer): the procedure seems OK
(correct sequence of lighting LEDs) but no sounds are really charged.

Is this a problem of the 5514 ? Or can be the 4042 latches ?

I really don't know...

thank you
at

On 1/4/07, gmanca101 <gmanca101@yahoo.com> wrote:
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> If you have dismounted the keyboard in the sense that you left the
>  circuit board connected to the main board but removed the membrane, do
>  a continuity test to see if the two halves of the pad are engaged. I
>  had a keyboard once that had a microscopic connection that caused the
>  connection to be made.
>
>  --- In PolySix@yahoogroups.com, "atuzzi" <antoniotuzzi@...> wrote:
>  >
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>  > Hi polyfriends,
>  >
>  > I decided to help my brother to resurrect his p6...
>  >
>  > YEEEEEEkkkk: acid!
>  >
>  > Ok you know was completely blocked, everywhere, everything...
>  >
>  > action taken the OLDCROW procedure:
>  >
>  > 1) removed battery
>  > 2) removed ic30 and 31
>  > 3) checked continuity
>  > 4) recreated dead traces
>  > 5) new lythium battery with diode in place and no more c40
>  > 6) new socketed 74ls08 ic30 and ic31
>  >
>  >
>  > status:
>  >
>  > A) all digital control are ok (effect type, waveform, sub ecc ecc)
>  > B) all buttons of the programmer are ok
>  > C) I can see data changing on TP2  (I have no oscilloscope in place,
>  > but only a DM and a Logic probe (I'm not in my lab...))
>  > I can see minimal variation coming out from the comparator (lm393) but
>  > after that, the data is going in the 8748 (T0 pin 1) and is Missing in
>  > Action.
>  > I can see the inhibit working on the 2 4051, that should distribute
>  > the data on the buffers. But data at the output of the buffers is all
>  > blocked (all maximum value seems)
>  >
>  > D) Key assigner problem:
>  > every time the p6 is turned on the note #56 (G in last octave) is on
>  > (GATE 0 is on). I need to switch the arpeggio on and off (or jump to
>  > unison and back to poly) to turn the note off.
>  > if an arpeggio is started, that #56 results always on.
>  > Is not a contact problem (I dismounted the keyboard). So seems another
>  > IC problem: Does anybody knows the correct logic test to do to
>  > individuate the faulting IC ?
>  >
>  > E) As I have a couple of 8748 and a programmer is the .bin for the p6
>  > available somewhere ? (I'd like to have a backup for the 2 p6)
>  >
>  >
>  > thank you for your help
>  >
>  > antonio
>  >
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