Korg Poly800/EX800 Users

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didn't have this, so the main board may have been replaced by someone along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