28 Sep
2008
28 Sep
'08
3:19 p.m.
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.
My experience is that if you find something wrong, it's best to correct
it even if it appears to make things worse.
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. (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!