"Meat Plow" wrote in message
news
On Fri, 15 Dec 2006 01:24:40 +0000, Arfa Daily Has Frothed:
"Charles Schuler" wrote in message
news
"Meat Plow" wrote in message
news
Not knowing much about rear projection TV sets (retired from that
tangent
of the service industry before they were popular) but sucessfully
repairing my own Panasonic 7 yr old PT51xxxxxxx (STK's, low value
resistors), I don't understand why this set when played via the
Component
input "Y/Pb/Pr" the convergence is flawless while any other source the
convergence still needs tweaking as truly it still does to the far
left.
Just curious as to why this is.
Also but not pertaining to rear projection crt sets but to DLP sets,
how
does the color wheel interact to the light source and the rest of the
video path? Not planning to service these, just curious again.
This might help a bit: http://en.wikipedia.org/wiki/DLP
Sorry, not my field of expertise really. Others on here much better
qualified to put you on the right path.
Arfa
LOL the convergence question or both? Don't you find it curious that the
dynamic setup of convergence has no effect when the component input is
used?
Hi Meat
Both really. I stopped being directly involved with TV sets, other than
watching the half-arsed programmes that they put out now, some years back. I
try to keep up with the theoreticals of the latest technology, but these
days, from a practical point of view, I even get confused with SCART
hook-ups ... !!
I can't really see any reason though, why edge convergence should be any
different between sources. I could see an issue perhaps with different scan
rates, progressive or interlaced drive, or possibly even aspect ratio, but
nothing springs to mind for just plain different sources. Is it definitely a
convergence error ? Could it be a timing mis-registration between the red
and blue drives, or in the green de-matrixing ? Or even perhaps some kind of
*ring* on one or other, giving rise to a coloured shadow ? Have you tried
different source equipment into that input, or a different cable maybe ?
You're right. You've got me interested now. As I said, I'm sure others on
here who are working with this kit every day, are far better placed to give
valid input than me, so come on lads, let's have some ...
Arfa