I know this is a long shot but does anyone out there have Heidelberg radio
schematic?  Not the rear I/O diagram
but the actual circuit diagram schematic for the interior.   I'd like to
try hacking a input for MP3 and it
would help to have a schematic.   I think I have the Heidelberg IV but
anything around that model will probably
be close enough.

Thanks!

Steven J.
91 Westy