On Mon, Oct 18, 2010 at 8:19 AM, Jonno Downes <jonnosan at gmail.com> wrote: > - is the 4023 "service manual" available through any means? Thanks to Bob Rosenbloom & Al Kossow, this manual is now on bitsavers - http://bitsavers.org/pdf/tektronix/402x/070-1617-00_4023_Computer_Display_Terminal_Service_Manual_May81.pdf