Thanks. They will be a great help if I ever get this darn thing working...
Fortuantely it's almost all standard chips inside (a few programmed parts
IIRC) so I'll ignroe the ridiculaor statement in the manual [1] and have
a go at fixig it. When I'm short of a project...
[1] 'No userer serviceable parts inside'. I can just about understnad
that on a TV set where many users probably can't service it. But on an
ICE? An instrument used by microcomputer designers? Be serious!
-tony