K5synth

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.

2007/5/26, bill bigrig <billbigrig@...>:
> Howdy,
>
>  Yes,I've openedthe synth. The connections around the
> wheel area look good upon cursory examination. i'll
> have to inspect more closeley. How do I get sounds
> back into the machine? It only has one and every sound
> on the disply is identical. It has one dead key and 4
> slugish ones, but I don't think I'l have any problem
> fixing that. My main issue is the wheel and lack of
> mulyiple sounds. Plus, I would like to upgrade the
> system to a later version just for the heck of it. I
> don't know if the lithium battery went dead and was
> relaced or not, but the present one is a solid3+ volts
> and looks faily new. Any chance the battery died and
> lost all the firmware/ THANX!!!
> Rig
>
>
> --- Antoine Deschênes <antdes45@...> wrote:
>
> > Well, the K5SINGLE thing is normal if the synth was
> > reset by the seller
> > or you, but not the dead wheel.
> >
> > I'm not sure the EPROM will help since the wheel
> > just doesn't work in
> > your case, which is a problem I never saw with V1.0
> > K5s, and you even
> > said that you reset the synth. Have you already
> > opened the synth(There
> > are two screws going in the cover on each sides that
> > need to be
> > removed)? Could you make sure that the wheel is well
> > connected to the
> > board at the right? Some solders and wires could be
> > cracked/broken too,
> > the one under the LCD panel for example.
> >
> > Antoine
> >
> > bill bigrig a écrit :
> > > Howdy,
> > >
> > >  As you probably already know, my k5 came DOA. It
> > only
> > > displays k5single on ALL the presets and the
> > whirly
> > > wheel does nothing when trying to alter midi
> > stuff.
> > > The battery is a healthy 3.05 volts, but it only
> > plays
> > > one sound. I think the place to start is with a
> > new
> > > eprom. Please let me know about cost and payment
> > > method. Thanx
> > > Rig
> > >
> > >
> > > --- antdes45 <antdes45@...> wrote:
> > >
> > >
> > >> Hi everyone, new updates about the ROM upgrades.
> > >>
> > >> I got the chip last week and successfully
> > programmed
> > >> one of them a few
> > >> minutes ago. It's in one of my K5s and it's
> > working.
> > >> (Which means I'll
> > >> be able to order all the chips shortly) Any new
> > ROM
> > >> requests are still
> > >> accepted.
> > >>
> > >> The other chip I ordered for my 2nd K5, for some
> > >> reason, got killed by
> > >> the programmer, burning two transistors on the
> > >> programmer itself at
> > >> the same time. I suspect that it's caused by the
> > >> computer that I
> > >> initially tried to program the chip with, it was
> > >> probably sending
> > >> strange commands on the parallel port due to the
> > >> crippled HP printer
> > >> drivers. All I know is that I will not try
> > >> programming ROMs anymore on
> > >> that computer.
> > >>
> > >> Antoine, Moderator.
> > >>
> >
>
>
>
>
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-- 
Antoine Deschênes