Manual for 464

Hi john.
Thanks for the reply.
With the aid of the links you supplied,(the tekscopes ng)
I
located a hard copy of the 464 manual.
In the meantime, I had a poke around and discovered
that the reference rail +65v was missing.
Replacing a couple of BJT's later and bingo !
I now have a trace again.
Now to fix the trigger !!
Many thanks again.
simon