Message #2 Posted by Ion Abraham (New Mexico USA) on 20 Apr 2001, 9:27 a.m.,
in response to message #1 by Hugh Wong
I've been down this road, not very successfully, so here
is what I know so far.
I have the service manual, and yes, the service manual does also apply to the CVs, although more so if they are
Fullnuts (rectangular screens). However, I don't think the
manual will be very helpful in diagnosing the sort of problem you are describing, which I also have seen before.
On the other hand, the manual does provide schematics, if
you want to get that far into it, which I haven't yet.
It's really interesting that the units work longer after
you short the terminals. It's my personal suspicion that
this sort of problem is caused by a bad/old component, like
a capacitor. I don't have any evidence for this, except
that this is the only way I can think of to explain the
sort of behavior you are describing.
I don't know how much this helps, but please post if
you are able to make any progress.
Albuquerque, New Mexico