Discussion about the Korg PolySix synthesizer

TE is Tape Enable. It should be +5v when not active. If you turn Tape Enable
on, it should go to near 0v.
Don B.

  _____  

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
aniello iaccarino
Sent: Saturday, September 18, 2010 10:07 AM
To: PolySix@yahoogroups.com
Subject: [PolySix] Re: Adjustment Procedure problems


  

Hi Andy
I did a continuity-check between P10 on the KLM 367 board and the relatives
points on the KLM 371

Then I did check P10 pins on KLM 367 with an oscilloscope (with KLM 371 not
connected) and I found this values:

pin1: D3 +/- 5V
pin2: D2 +/- 5V
pin3: D1 +/- 5V
pin4: D0 +/- 5V
pin5: P13 0V
pin6: P12 0V
pin7: P11 0V
pin8: P10 0V
pin9: D4 +/- 5V
pin10: D5 +/- 5V
pin11: D6 +/- 5V
pin12: D7 +/- 5V
pin13: P26 0V
pin14: P27 0V
pin15: +5V
pin16: GND 
pin17: TE +5V (what does TE means?)

Are this values regular?

cheers

Aniello

--- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> , "aniello
iaccarino" <ani.bliss@...> wrote:
>
> I'll try asap and let you know!
> Thanks
> 
> Aniello
> 
> --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> , Andrew
Jury <andy@> wrote:
> >
> > Hi Aniello,
> > 
> > If you are trying to set up �init clear� (reset) with the 56K resistor
on
> > the test point on the power supply all the LEDS should come on without
any
> > exceptions. You are basically setting the point where /REST on the CPU
goes
> > low. Rotate too far and the output from the comparator is always low and
> > thus all the LEDs are lit in reset mode. If LEDs are changing from on to
off
> > then I would suggest you have a problem with with data/PIO bus. Start at
> > connector CN10 and make sure the wiring from here to the KLM 371
(right-hand
> > top panel PCB) is all sound. If you have a logic probe or a scope you
will
> > find this very usually for measure state on these lines and whether you
have
> > connectivity. If this is a acid damaged repaired 367, then go back and
take
> > a look at track continuity around where the old battery used to be,
around
> > IC30/31 and even under the CPU socket. This is a favourite place for
unseen
> > acid damage to lurk!
> > 
> > I would strongly suggest you look at these problem first before you
attend
> > to the MG issues. IC21 and IC16 (or parts of) form an astable with part
of
> > a a timing constant in C19. However, don�t forget that IC21 is a
> > transconductance amplifier and is controlled by a current on pin 16. So
you
> > should also test the controlling circuitry from the demultiplexor
downwards,
> > as well!
> > 
> > Cheers,
> > Andy 
> > 
> > On 08/07/2010 16:28, "aniello iaccarino" <ani.bliss@> wrote:
> > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > Hi Andy
> > > I'm working on the original KLM367 board.
> > > 
> > > Cheers
> > > Aniello
> > > 
> > > --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
<mailto:PolySix%40yahoogroups.com> , Andrew
> > > Jury <andy@> wrote:
> > >> >
> > >> > Are you working on an original KLM-367 or trying to calibrate the
clone
> > >> > board?
> > >> > 
> > >> > Cheers,
> > >> > Andy
> > >> > 
> > >> > 
> > >> > On 05/07/2010 22:26, "aniello.iaccarino" <ani.bliss@> wrote:
> > >> > 
> > >>> > > 
> > >>> > > 
> > >>> > > 
> > >>> > > 
> > >>> > > 
> > >>> > > Hi Friends
> > >>> > > I recently did the adjustment procedure and I found two
problems.
> > >>> > > 
> > >>> > > The first is: not all the leds BANK A-D, PROGRAMS 1-8, MANUAL
and TAPE
> > >>> > > ENABLE lights up when i turn VR1 from left to right, but every
time I
> > >>> > > pass a certain point of VR1 leds light up in different
combinations.
> > >>> > > [[-(]
> > >>> > > 
> > >>> > > I have to say that I can proceed to the calibration procedure
anyway.
> > >>> > > But I don't know If the result of the calibration procedure
could be
> > >>> > > better if all leds light up instead some of them.
> > >>> > > 
> > >>> > > The second i found is that when I regulate MG speed I can't
obtain a
> > >>> > > cycle of 10-40 sec, but just 4 sec, a very short cycle. [[-(]
> > >>> > > For this problem have I to check IC21 and C19?
> > >>> > > 
> > >>> > > Any suggestion? [:D]
> > >>> > > 
> > >>> > > Thanks
> > >>> > > 
> > >>> > > Aniello
> > >>> > > 
> > >>> > > [Non-text portions of this message have been removed]
> > >>> > > 
> > >>> > > 
> > >>> > > 
> > >>> > > 
> > >>> > > 
> > >> > 
> > >> > 
> > >> > 
> > >> > [Non-text portions of this message have been removed]
> > >> >
> > > 
> > > 
> > > 
> > > 
> > > 
> > 
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
>






[Non-text portions of this message have been removed]