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Vintage Synth Repair

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Kurzweil K2600; keys not triggering

2012-12-11 by snowleopard

Anyone have experience with a Kurzweil K2600(s)? I have one that has a few keys that do not trigger on/off. The synth will produce those sound internally (via Midi) and the keyboard is sending out MIDI aftertouch on those keys, but not on/off at any velocity. This started with one key, then that key came back to life. Then it went out a week later, now 2-3 more keys. I have a suspicion it's dirt/dust/grit, but before I rip the thing apart, I want to talk to someone who has pulled the hood off. I took apart a couple old analog synths, but want to get some advice before opening this beast. 

Any and all comments appreciated.

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