Re: K5 distorted output from patches using Source-2

$15.00 US plus S/H and the d/cf they wanted filled out is now DOA...

--- In [email protected], James Bong <jamesbong@...> wrote:
>
> How much are they charging you for it? 
> 
> James
> 
> --- narfman96 <narfman96@...> wrote:
> 
> > The balance only controls the volume for S1 and S2.
> > If S1 is all the 
> > way down S2 is cranked. Other than the DDA envelope
> > (oh yeah the DHG 
> > levels too) ahhh, where can S2 be turned down to
> > sublight.
> > 
> > The aftertouch was easy. There's 2 pots on the
> > backside of the MI-004 
> > board they say Gain (VR1) and Offset (VR2) on them.
> > Open Midi-Ox and 
> > watch the pressure change the values for aftertouch
> > from 00 to F7. 
> > Adjust these pots to get the best performance for
> > your preferences. 
> > Offset is where it starts to kick in. Then the gain
> > adjusts how 
> > quickly F7 cranks in. I like a smooth contollable
> > range that doesn't 
> > rip my tendons out.... That's why I can tell the
> > notes from G3 to D4 
> > in this K5 aren't as responsive as the rest. 
> > 
> > Whoohoo!!! I'm talking to Kawai about the Service
> > Manual. They are 
> > soooo gooood in this day and age of crapping on us
> > hardware guys. 
> > Oops did I say e-mu? Awww darn! Dirty bird!! I want
> > my money back!!!
> > 
> > Anyway the manual should be on its way....  Fran   
> > 
> > --- In [email protected], James Bong
> > <jamesbong@> wrote:
> > >
> > > How does it sound if you turn S1 all the way down,
> > and
> > > start turning up S2? Same distortion?
> > > 
> > > Oh, and where was the after-touch adjustment? I'm
> > > always afraid I'm going to tip my stand over when
> > I'm
> > > using after touch modulation!
> > > 
> > > James
> > > --- narfman96 <narfman96@> wrote:
> > > 
> > > > Yes I do have a scope I just haven't gotten that
> > far
> > > > yet. Yesterday I 
> > > > rebuilt the keyboard. This synth has a nice
> > action
> > > > when it's all 
> > > > greased up and triggers every note. I found the
> > > > aftertouch 
> > > > adjustments and got it more sensitive than the
> > key
> > > > bending tipping 
> > > > over the stand mode it was originally set for.
> > The
> > > > aftertouch strip 
> > > > has a few spots that are less sensitive but hey
> > it's
> > > > a beast....
> > > > 
> > > > If it will help I can post the DAC's datasheet
> > here
> > > > in the files 
> > > > section so you can see what weird output
> > > > configurations it can have. 
> > > > Either current or voltage outputs can be used.
> > There
> > > > isn't any pot 
> > > > for the offset zero. Also it seems like Kawai
> > > > doesn't use much of the 
> > > > gain that's available. Maybe that's why it's so
> > > > noisy.
> > > > 
> > > > The patches sound like they should if I turn the
> > > > balance so S2 is off 
> > > > (-31). Except of course they're thin and
> > lifeless
> > > > without the other 
> > > > voice mixed in. I saved a bank that way so I
> > could
> > > > check out the 
> > > > keyboard. I can see where some of the noise
> > comes
> > > > from. The high 
> > > > frequency response goes way out there. Most of
> > these
> > > > 80's and 90's 
> > > > synths have low pass filters. This thing sounds
> > wide
> > > > open on top end! 
> > > > Probably so you can hear the 128 harmonics in
> > all
> > > > their glory.
> > > > 
> > > > Hopefully I won't be beat when I get home from
> > work
> > > > so I can play 
> > > > around with this some more. Still haven't heard
> > from
> > > > Kawai yet about 
> > > > the schematics. Also they always have me sign
> > their
> > > > non-disclosure 
> > > > form so I'm leery about openly posting them in
> > the
> > > > group. Of course 
> > > > helpful individuals are a different story.
> > Right???
> > > > 
> > > > Fran
> > > > 
> > > > --- In [email protected], James Bong
> > > > <jamesbong@> wrote:
> > > > >
> > > > > You wouldn't happen to have an oscilloscope to
> > > > verify
> > > > > that the output of this chip is actual
> > problem, do
> > > > > you? 
> > > > > 
> > > > > If you do get the schematics, could you
> > possibly
> > > > get
> > > > > them scanned to share with the rest of us?
> > > > > 
> > > > > James
> > > > > 
> > > > > --- narfman96 <narfman96@> wrote:
> > > > > 
> > > > > > I resoldered everything involved in this
> > part of
> > > > the
> > > > > > circuit. There 
> > > > > > is a feedback resistor on the DAC for the
> > audio
> > > > > > output. This measures 
> > > > > > 6.8k same as the working one. Maybe tonight
> > I'll
> > > > try
> > > > > > lowering this 
> > > > > > value to see if the gain decreases.
> > > > > > 
> > > > > > I'm not having much luck finding a PCM55HP
> > DAC.
> > > > > > Digikey lists it for 
> > > > > > $38.50 with a long, long lead time... Crap!
> > > > Anyone
> > > > > > know of a source?
> > > > > > 
> > > > > > Hopefully Kawai gets back to me today about
> > the
> > > > > > schematic.
> > > > > > 
> > > > > > Thanks, Fran
> > > > > > 
> > > > > > --- In [email protected], James Bong
> > > > > > <jamesbong@> wrote:
> > > > > > >
> > > > > > > Does this chip have a bias circuit to set
> > the
> > > > > > min/max
> > > > > > > output voltage scale? It could be
> > something as
> > > > > > simple
> > > > > > > as a cold solder joint finally loosing
> > contact
> > > > and
> > > > > > > changing the bias. I'd check/re-solder the
> > > > solder
> > > > > > > joints to everything connected to the
> > chip,
> > > > and
> > > > > > the
> > > > > > > chip it's self.
> > > > > > > 
> > > > > > > James
> > > > > > 
> > > > > >
> > > > >
> > > > 
> > > > 
> > > >
> > >
> > 
> > 
> >
>



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