3 Feb
2013
3 Feb
'13
1:14 p.m.
On 2013 Feb 1, at 2:54 PM, Robert Ferguson wrote:
Thanks for the suggestions.
I've looked for visible arcs as carefully as I can, and have been
unable to see any. I've cleaned and resoldered the connections to
the transformer, and removed and cleaned the anode connection to
the CRT. I don't know if you can remove the anode connection at the
flyback end, so I haven't fiddled with that.
Is it reasonable to assume at this point that the arc is *inside*
the flyback cover? Is it possible that a component failure outside
the transformer could cause arcing in the flyback, or does it mean
that the flyback itself is at fault?
The flyback transformer appears to be unobtainium (although if
someone knows different, I'd love to hear about it). I guess I'm in
the market for a PET video board....
Rob, I have a 4032 with logic problems, that I have yet to get around
to fixing. (I did some diagnosis years ago and found how the problem
was arising, but still a fair bit of remaining work to repair it,
although it could be a fun task).
Seems a shame to scrap one, but if the particular flyback is that
difficult to come by, perhaps it's time to make one good machine out
of the two.
Fortuitously, I'm in the Vancouver area, going from your website it
looks like you are too.
I'll have to open the 4032 to confirm that it uses the same video
board as you need.