Re: WG HV problem

I've had Tempests do this and its always ended up being
that high voltage zener diode in the regulator feedback
loop. Don't remember the exact voltage, but it's over
50 and under 100. These cause all sorts of interesting
high voltage problems.

Won't cost much to replace, even if you use ECG/NTE
for the replacement. But turn the high voltage way down
first. Reason? If you have, say, an 82 volt zener that's
breaking down at 50 volts and you set the pot to get 25
KV out and then replace the zener the output will TRY to
go up past 30 KV (I say try, something else will probably
blow up first). Be safe, turn down the voltage, replace
the zener, THEN readjust the voltage.

Dan Todd wrote:

> I was wondering if one of you fine folks might have seen something similar to
> what I'm about to describe and help me solve a problem.
>
> I've got a newer style (with the HV trip), WG 6102 HV cages, and the HV varies
> by as much as 200 volts. The picture pulses bigger and smaller constantly. Any
> clues as to which area to examine?
>
> All my other monitors stay dead on 19 KV when I set them.
>
> I had an HV with a bad transformer and one with a bad focus ass'y and this one
> was made by splicing the HV wire from the good transformer to the good screen
> control. The splice is good and doesn't appear to be leaking. Could this splice
> have something to do with the prob. I know on the latest monitors there is an
> additional pot on the neck board that adjusts the brightness. Is is possible
> that the screen controls from earlier monitors won't work with later model HV
> transformers?
>
> Now back to the regular Tempest discussion. :)
>
> Thanks in advance for any help,
> Dan
>
>
Received on Thu May 27 02:49:32 1999