There would be two switches per key if it were, one closing slightly after the other the microprocessor determining key velocity by the time between the two switch closures. for KORG POLY-800 Polyphonic Analog Synthesizer Keyboard Used Tested Working. That's perfectly normal for it, as far as I'm aware but. The joystick is hard to tell without tracing the signals. Which keys are failing? They're usually wired in a matrix if keys on the same row or column are intermittent/dead you have an electronic fault.īy the way, it isn't velocity sensitive. I would investigate the NJM4558 opamp (IC2) as a first suspect. Even IPA takes some of it off why I'm sparing with the IPA and only give each pad a couple of gentle wipes each with a cotton bud (and get through a lot of them.) MEMORY Memory is non-volatile if 6 x 1.5 V batteries are fitted- there is a custom modification to implement an internal lithium 3V like Cr-2032 internal memory holds 64 RAM patches in 8x8 banks, no ROM so you need to load by tape (it's provided on this page).It is NOT possible to edit the Poly-800 using a computer as there is no Midi Sysex implementation, later corrected on desktop EX800 and revision model Poly800 Mk2. 1999 Korg Triton workstation, 64-note poly-S&S with Knobs come back into. But, removal of these should not make the synth freeze. And its true, is it not, that the Pol 800 MK1 has no battery backup other than the 6 c cells. What did you use to clean the rubber pads? If you've been too enthusiastic and/or used to aggressive a solvent, you may have removed enough of the conductive coating to cause problems. mixed FM and sampling more powerful SY99 technology 1991 Roland JD-800. Just a thought-Ive heard certain sequencers connected via MIDI to the Poly 800 can cause a complete system crash-any way o rectify this via MIDI. and have 100% success even with previously very badly intermittent keyboards. Note: Both sequence and program data are loaded and. I've never once had to resort to conductive paint etc. It loads the factory content into the Korg POLY-800 by way of the tape interface or via midi sysex. I restore/repair vintage synths I clean each conductive rubber pad gently with IPA and a cotton bud, then clean the PCB contacts with Servisol 10 (applied with paper towel) followed by a polish with one of those mildly abrasive blue 'ink erasers' does the trick.
IME it's unusual for it to have failed to respond to cleaning.
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