Korg Poly800/EX800 Users

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
> >
>