They are the H9 ones at the end - I have been reading them this morning.
The one with the overview of operation which I am reading on paper is the operation manual:
H9 Video Terminal Operation Manual Part 595-2017-03.pdf
Which refers to the diagrams in its partner booklet...
H9 Video Terminal Operation Manual Schematic Part of 595-2017-03.pdf
It is quite large as a PDF so I am trying to cut out smaller diagrams but, I think as before I will need to stitch together several A4 sheets to get readable printouts. The two block diagrams are here for others to wonder at the complexity...
For a laugh the TPU one is here but, you will need the original to read it - I suspect that the PLA and or one of the three fused PROM's may be the first area to investigate although there is no equivalent model number for the PROMS which are 256x8 so I may need to puzzle through from the pinout on Page 84 - at least the contents of the PLA and ROMS are on the next pages...
