Yamaha CS80

On Dec 3, 2013, at 12:50 PM, <pyjamagroove@...> <pyjamagroove@yahoo.com> wrote:

> Wow. Crazy. If I touch with my multimeter pin 3 or 15  of IC4 the key, AT, IT works! But the multimeter has to be turned on....I read there 0.14V to 6,5V fully pressed. When I remove the probe it key works few times and it´s back to screaming.

Sounds like you’re missing the 1MΩ resistor to ground (or the 22k - don’t remember which one is initial touch and which is aftertouch) for that note on the TSB board.  Without it, the capacitor charges up and stays at maximum voltage.

 David