Korg Poly800/EX800 Users

Any other ideas?

--- In korgpolyex@yahoogroups.com, "cc0919ship"  wrote:
>
> Thanks. The switch appears to be working normally.
> 
> --- In korgpolyex@yahoogroups.com, "backshall1"  wrote:
> >
> > The four "main" pins are nothing. They just ground the outer metal shell of
> > the switch and keep it securely on the board. There are only two pins that
> > matter, and you can see which two they are by looking at which pins actually
> > have something connected to them. When enabled, these two pins are shorted
> > together ( less than 0.5 ohms with an ohmmeter). When disabled, they are not
> > connected to each other (greater than 10 Meg ohms between them).
> > 
> >  
> > 
> > Don B.
> > 
> >  
> > 
> >   _____  
> > 
> > From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
> > Behalf Of cc0919ship
> > Sent: Saturday, January 19, 2013 10:51 PM
> > To: korgpolyex@yahoogroups.com
> > Subject: [korgpolyex] Re: Frozen Poly 800
> > 
> >  
> > 
> >   
> > 
> > Thanks for the suggestions. I took a look, sequencer was disabled. Perhaps
> > the switch is bad? I'm not sure how to test it, it has 4 main pins, then 14
> > smaller pins. I'm using a multimeter, but can't figure out what pins the
> > switch is effecting.
> > 
> > --- In korgpolyex@yahoogroups.com  ,
> > "backshall1" wrote:
> > >
> > > That sound like the sequencer "enable" switch is on, plus you have no
> > > patches in memory. The sequencer switch on the back should be set to
> > > "disable" unless you are recording a sequence. Since this is an original
> > > Poly 800, there are several versions, some with a CR2032 lithium cell
> > inside
> > > to hold the sound patches in memory when it is turned off, and some
> > without.
> > > Since you just changed the battery, the memory will be empty or really
> > > random.
> > > 
> > > 1) Make sure the sequencer is switched to disable.
> > > 
> > > 2) You need to reload the factory patches or program one of your own for
> > > testing purposes.
> > > 
> > > If you've never loaded a patch audio file (.wav) on the "Tape In" jack of
> > an
> > > early 80's synth, you may want to start by just programming one of your
> > own.
> > > Unfortunately there are 50 parameters and you need to make sure all of
> > them
> > > are set at something reasonable to get a sound. You might start by setting
> > > the Attack, Decay and Release to 0 and the Break P, Sustain to maximum
> > (31)
> > > for Deg1, Deg2 and Deg3. I don't think the Slope matters when set this
> > way.
> > > If you hear noise, then alter parameter 33 (Noise level) to see if it
> > makes
> > > a difference. Oh, and parameter 41 (Cutoff) should be turned up full
> > during
> > > this testing.
> > > 
> > > 
> > > 
> > > If the sequencer switch is really the main problem, then you should be
> > able
> > > to get some sound out of it and we can help you get the factory patches
> > > loaded if you need help.
> > > 
> > > 
> > > 
> > > Don Backshall
> > > 
> > > 
> > > 
> > > _____ 
> > > 
> > > From: korgpolyex@yahoogroups.com 
> > [mailto:korgpolyex@yahoogroups.com  ]
> > On
> > > Behalf Of cc0919ship
> > > Sent: Saturday, January 19, 2013 9:32 PM
> > > To: korgpolyex@yahoogroups.com  
> > > Subject: [korgpolyex] Frozen Poly 800
> > > 
> > > 
> > > 
> > > 
> > > 
> > > Hello all,
> > > 
> > > I'm wondering if you can help me out. I recently acquired a broken Poly
> > 800
> > > (original, not MKII.) It powers up, but immediately after powering up, the
> > > screen reads "1.8 50 01." Buttons on the front panel do nothing, and keys
> > do
> > > not make noise. If I turn up the volume the whole way, I can hear the
> > filter
> > > sweeping up and down. Here's where it gets interesting - I plugged in a
> > MIDI
> > > keyboard, and when I play notes with the MIDI keyboard, the 800 makes
> > static
> > > noises, and the last value on the screen increments by one.
> > > 
> > > I opened it up, checked the tactile switches (all seem fine.) I also
> > > replaced the internal CMOS battery. I was under the impression that MKI
> > 800s
> > > didn't have this, so the main board may have been replaced by someone
> > along
> > > the line.
> > > 
> > > Anyway, has anyone had a problem like this and could help me out? It is
> > > potentially one of the ICs, but I have no idea how to test them.
> > > 
> > > Thanks,
> > > 
> > > Christian
> > >
> >
>