Need an Elston analog video board for VT100
ard at p850ug1.demon.co.uk
Fri Feb 9 18:32:47 CST 2007
> Yeah, I've already tried that. It didn't fix the problem. Also, it should
> be noted that Radio Shack's parts area has shrunk to something useless in
> most cases.
> Got any other suggestions? I have no idea what it could be. I've replaced
> the flyback/choke, the PSU, and repaired the analog board. Only things left
> are the logic board and the CRT. Maybe I should pull the analog board and
> resolder it? I've got no clue.
You've not even told us what the problem is!.
Now what _I_ would do is grab the printset (I assume the VT100 printset
is on the web somewhere...) and start by checking the PSU outputs. Are they
Then connect a standard RS170 (TV rate) monitor to the video output BNC
socket. Doe you get video there? Does the terminal seem to work on the
external monitor. If so, then the logic board is probably working fine.
Now go back to the internal video syustem. Use an EHT probe to check the
EHT on the CRT anode connector (should be around 12kV I think). Is the
CRT heater glowing? Check the CRT gun electrode voltages. Do they seem
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