Thanks for the scrounging-up of that document, I passed it on to the engineer, though reading it, it says the scan doubler is not for the model 141.
I have restored partial screen functionality using another borrowed ancient monitor… it was no better at first than the others we tried, but then I ran the 141’s VGA output thru our $6,000 Communication Specialties Scan-Do-Pro scan converter/video scaler. Yeah, a 6k scaler to make a 10-dollar junk monitor work… THAT is not a long-term tenable setup!
Using an output setting I think is called “PC 640″, I have *some” of the display (and some garbage alongside) back and readable enough to see the right hand side data and things like duration, and I can guess the rest, enough to finish the current project. Not so surprisingly after all these years of use, I find the hands run the controller well without needing as much reference to the display as one would presume. Then again, most of what I do is cuts, dissolves and fades, can’t even remember the last time this system commanded a wipe.
The original monitor cannot be repaired. Some protection relay in it is clickig like the turn signal of an old man’s Buick Roadmaster. The flyback xformer and all the crt drive electronics are in an encapsulated moduel that’s not repairable. I wish I knew more about this nonstandard display format the 141 uses, and how we could adapt somethign else around here to read it. This system could go another decade as long as there was a monitor that worked.