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Yamaha CS80

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How can I get better results with velocity and aftertouch?

2010-07-17 by Mike

I've already replaced the tantalum and electrolytics on the TSB1 & TSB2 boards but still get some very mixed results going into the 4051's.  My voltages for aftertouch at full pressure can range anywhere from 4.5v to 6.5v+  Right now, I'm wondering how much of a difference it would make to replace the 22K resistor, the .047 cap and the 1M resistor on the TSB1 & TSB2 Boards.  I still haven't measured velocity with a scope yet but it could definately be better.

I've got a gut feeling that I need to take the actual keybed apart and rebuild it.  Has anyone ever done this?  Does anyone have advice?  This may sound silly, but how do I take the white keys out?

-Mike

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