K5synth

Howdy,

 ichecked the data wheel connections al the way down
to the chassis cicuit board. Thay all conduct. All the
butons work. I tried jumpering the pins on the data
wheel contancts, but to no avail. I shot it with
circuit cleaner, but nothing. I notice that the
display blinks when turning in one diretion, but stays
steady the opposite way. Is there a way to simulate
the pulses from the data wheel? Either the wheel
doesn't work, or there is a problem on the lower
board. any ideas? Do I need a logic tester to test the
data wheel? Also where are the +/_ buttons that the
display says to press, or is it moving the data the
way to selct plus/minus. What is the first chip on the
board that the data wheel goes into and what should I
expect at the pinouts?
Thanx
Rig


--- bill bigrig <billbigrig@...> wrote:

> Howdy,
> 
>  Assuming I get the wheel working,9the cursor
> switches
> do work), how do I com up with a source for the
> original sounds to load with system exclusive?
> Thanx.
> Rig
> 
> --- Antoine Desch\ufffdnes <antdes45@...> wrote:
> 
> > bill bigrig a \ufffdcrit :
> > > Howdy,
> > >
> > >  You say to diconnect then reconnect the
> battery?
> > Yes, that's the only way to reset the RAM. I said
> a
> > while ago to 
> > disconnect and reconnect the battery to reset the
> > synth, and I just said 
> > to disconnect and reconnect the cables between
> > MI-003 and the wheel.
> > > I forgot. The rest of your tips, I will try, and
> > THANK
> > > YOU for this valuable info. i will do these
> tests
> > and
> > > get back to you. THANX AGAIN!!!!
> > > Rig
> > >
> > >
> > > --- Antoine Desch\ufffdnes <antdes45@...> wrote:
> > >
> > >   
> > >> If the battery doesn't work, you'll just lose
> > your
> > >> sounds every times
> > >> you start the synth. The ROM can't be damaged
> > from
> > >> normal use. I'd try
> > >> to reseat(disconnect, connect) the cables
> related
> > to
> > >> the switch and
> > >> wheels if I was you.
> > >>
> > >> To put back sounds you'll need the wheel to
> work
> > :
> > >> You have to go in
> > >> the midi menu to enable SysEx receiving and
> > >> transmission, which is
> > >> sadly impossible for you right now.
> > >>
> > >> But if the buttons work and not the wheel, the
> > >> interface should still
> > >> work, unless you have an hardware problem
> > >> somewhere...
> > >>
> > >> OK, I looked at the schematic(All the following
> > is
> > >> about the MI-003
> > >> circuit board). The two wheel encoder signals
> > pass
> > >> through three 74HC
> > >> logic ICs to end in the same data lines as the
> > >> LCD(The CPU seems to
> > >> use the same data port for both) If your LCD
> > works,
> > >> the problem is
> > >> more likely to be situated with the logic(Two
> > >> 74HC365 and a 74HC74) or
> > >> the wheel encoder itself.
> > >>
> > >> The encoder signals pass through R10 and R8 to
> go
> > in
> > >> U9, then U12 and
> > >> U7. Maybe you could try to see if the signal
> > >> actually gets to R8 and
> > >> R10?
> > >> In my case, I briefly get some pulses on R8 and
> > R10
> > >> while I turn the
> > >> wheel.(The encoder uses pulse switches)
> > >>
> > >> And now, on the MI-008 board, the two bottom
> pins
> > >> should feed 5v to
> > >> the encoder, and the top ones just send pulses
> > when
> > >> it's turning.
> > >>     
> > 
> > 
> 
> 
> 
>  
>
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