From xxcaptinxx@comcast.net Sat Feb 16 13:26:00 2008
Subject:Re: Nord Electro dead keyboard region

I can't help with your specifics, but I had a similar problem with a Roland
electric piano keyboard. I got a set of schematics and opened up the box,
then I studied the schematics and the circuit boards for about three hours,
'til I understood where everything was located. I narrowed the common point
to a single transistor, waited three weeks for a replacement to arrive from
Japan, then discovered that wasn't the problem 'cause the new one didn't
help. That fact, however, led to another process of elimination leading to
the conclusion there had to be an invisible crack in one of the PCB traces.
I soldered a jumper wire across that trace's end points, and all came back
to life.

I did a very similar thing with a Korg Triton rack that had been plugged
into 240 VAC mains by mistake. The prior owner sold it to me for a song.
Both rescues cost me less than $15 each to cure.

My thought is, if you have the schematic and the patience, you can very
likely isolate the issue to something repairable with the connectors, board
components or wiring. Just swapping a board isn't always cost effective if
they aren't returnable. Better to take it to a certified Nord tech who can
carry the test board in his parts bin if it doesn't help you.

Regards,

Dave Bishop