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Seen this twice now so it's probably fairly common. Anyway this problem will cause the unit not to power up at all. I replaced with bigger NTE378 and it works fine (reverse the leads). You'll measure between Base and collector a forward drop but not base and emitter. The mk1 may be immune to this though corrupt data can also exist in a MK1 I see.Īnother common problem appears to be Q1 blowing open. The problem, believe it or not, was corrupt data in my MK2. First the MIDI destruction was happening whenever I sequenced to it. UPDATE! I got back into these and figured out a few things. At least the II has sysex loading and some of the factory sounds were pretty identical to some I liked.
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I have to hold the 'most patches lost' record. I was just moving it into my midi setup after playing it for months and getting used to those sounds.gotta love it. This, being right before i saved the arrangement of course. A cyclic runaway repeating midi stream took it down to the same bizarre sound on every patch. Mine had a cool problem when it midi-looped. The machine I have was a lot of bad solder and cleaning issues. The II which I have adds digital delay though in place of BBD ensemble effect. I have not studied the architecture in detail on this one.some day. General Info Links: Vintage Synth ExplorerĨ DCO's with one Korg Filter.so a mix of polyphonic and paraphonic. It's basically just a panel break out for trim pots to give wide control of filter settings.
#Korg poly 800 battery replacement mod
Modifications: 'moogslayer' mod Hey.I didn't make up the name :-). Uncommon chips/modules used: Korg 2069BDB VCF (NJM2069BD), MN3209/MN3101/NE570 (replaced by Digital delay on Mk II) Parts Sources: Keys knobs semiconductors misc Scematics/Service Manual: fdiskc archive or Patchell's page Patches or knob settings: rlsnuffy mkII sounds or Factory.wav Operating System code: Sepulveda's ex800 page