[sdiy] Various and sundry keyboard problems

[Rainer Buchty]

>ESQ-1
>Unfortunately, a reset didn't cure the keyboard problem (set of eight or so
>'dead' keys). The bad keys will sound occasionally, but they are very quiet,
>and they sustain forever (the notes sound quietly until I play enough notes
>on the good keys to 'steal' the voices and shut them off). It could be
>several things, but I'll have to take it apart to really check. In the
>meanwhile, it's working perfectly through the MIDI in.

So it's either the keyboard itself (mechanical or electrical problem) or 
the keyboard processor which does the scanning. A set of 8 looks like an 
entire row is not responding.

For testing, you could build an adapter which just swaps the row lines. 
If you now have the non-responding keys moved to another location, it's 
the processor.

Rainer