Patches and discussion for Ensoniq VFX family

Hello
I have a VXF-SD that continually fails the keyboard calibration. I've
already hardwired all the keyboard connections as listed on various
web sites. Does anyone have schematics or other information about how
to fix this problem? I would hate to reverse engineer the keyboard
circuit if it is already available. It maybe a bigger problem than
just the keyboard because when the unit fails it gives the option of
recalibrating or ignoring the failure. If I press the softkey
associated with the selection nothing appears to happen. It seems as
though the unit locks up after the keyboard error. Does anyone know
if this is normal? I help would be greatly appreciated.