21 Oct
2002
21 Oct
'02
9:50 p.m.
VT52, but I
only have the power cord. Inside there is something that
looks like a connector, but I'm not sure if it really is one.
There's a little daughterboard that plugs into one of the logic boards.
It contains the circuitry to convert between TTL levels and current loop
or (I guess) RS232. Do you have this board? If you get no other replies, I know I have the VT52
printset. Be warned
it's not an easy device to debug unless you're used to it. It's basically
a special-purpose processor + firmware ROMs, and about 90% of the
circuitry has to be working to get a display. But there are clearly tests
you can do to eliminate the sillys (like 'is the master clock running' :-))
-tony
thanks, but if Eric Smith scans them, I hope I can start.
I'll see if I can repair it....
Thanks, lothar