28 Sep
2008
28 Sep
'08
10:31 p.m.
On Sunday 28 September 2008 18:19, Tony Duell wrote:
If you don't see it without a magnifier you don't have a convergence
problem. :-)
Sounds about right to me.
Sure.
And the adjustments you talk about are not really all that critical either.
I've done them, bunches of times, as a matter of normal service routine,
back when I was working on that sort of stuff.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
On Sunday 28
September 2008 13:20, Tony Duell wrote:
Exactly.I've not looked carefully enough to see this (I think a magnifier
is needed), but I don't think the complementary colour fringes are there,
which implies to me that it's an amplifier problem. For those wondering what the current state of
this monitor is, I've
cleaned up all the case parts and put it back together. It still works
(so I didn't do any damage taking it apart), although there are still
red fringes to the right of (say) white objects.
If it were a convergence problem you'd see fringes of the opposite color (cyan?) on the
opposite side of the screen objects. Since you don't
mention these I'm assuming that it's not the case.
That's exactly what I intend to do. The video board was clearly intended
to ahve 3 indetical amplifier circuits on it, the resistors in question
should all be 12.4k. I am not sure if this is a convergence problem or
due to the change in
video amplifier response due to that open-circuit 12.4k resistor which
I've not replaced yet
I'd change that out and go ahead and see what it looks like. My experience is that if you find something wrong,
it's best to correct
it even if it appears to make things worse.
Yes.
(I wanted to make sure the monitor still worked after
I'd finished
pulling it about before changing anything).
Well, I wouldn't worry too much about the beam current and all that
stuff -- change the resistor out and see what you end up with!