I've scanned the schematics from the 480Z
Information File and put 
them
 online. However, they are hand-drawn, so I've had
to scan them in
grayscale at 300dpi in order to be readable.
 
http://vt100.net/rm/480z/schematics/ 
        Be warned that the page does not load
        if you have Javascript on (at least in
        Netscape 4.7). It appears to be missing
        at least 
http://vt100.net/rm/480z/rml.css.
        Netscape 6 OTOH is fine.
        Antonio