I recently got a bunch of old 80's crts which I cant find any information about online.
I do have the service manual tho link
Looks like standart composite with external Horizontal and Vertical Sync to me but I'm not 100% sure and I dont want to fry anything
Thanks,
Oha
A3.2 and B2.1 in the manual show you the pinouts of that jack and the expected signal, unfortunately section 6.1 schematics and sec D timing diagrams seem to be missing. You’re going to need to find a suitable driver circuit. Without looking at the timing it might accept input from an old MDA adaptor or similar.
https://en.wikipedia.org/wiki/IBM_Monochrome_Display_Adapter
Edit: While this in behind a paywall it looks like this old article has a circuit for composite to TTL monochrome that would be what is needed.
https://www.elektormagazine.com/magazine/elektor-198812/47485
This one is from the 1980s itself and there also seem to be a lot of TTL to composite circuits out there that use fairly modern (and a lot fewer) components so with a bit of looking you might find a modern composite to TTL driver circuit. Look at the retro computer and retro arcade game forums, etc.
Forgot to reply but I got another scan of the manual that includes these scans from the person that gave me the crts. https://i.ohaa.xyz/raw/oRiMLv.pdf
Thanks, I really appreciate your detailed answer.