Arfa Daily ha scritto:
"Telespalla Bob" wrote in message
. ..
Franc Zabkar ha scritto:
On Sun, 22 Mar 2009 11:05:07 -0500, "Mark Zacharias"
put finger to keyboard and composed:

"Telespalla Bob" wrote in message
. ..
Hi, I have gained one LG based Plasma TV set.
This TV is maked around model 42V5 chassis.
In dark scenes, I see high quantity of green dots that is very numerous
immediately after brightness change from light to dark, then decreases
if scene persist dark.
How I can check?
Sounds like a Vs adjustment...

Mark Z.
Ditto.

The Serviceman column in the April 2009 issue of Silicon Chip Magazine
identifies the problem as a V Setup adjustment. FWIW, on the
PDP42V72462 chassis it is VR1 on the Y Sus board.

- Franc Zabkar

Thanks to all.
If Vs and VR1 adjustment does not solve the problem, is it possible that
this is an electrolytic capacitor failure?

Thansk.


Anything's *possible* I suppose, but in this case, I would say that it's
pretty unlkely. The symptoms you describe are very typical of mis-adjustment
of Vs, and I would give correcting that, a better than 90% chance of success
...

Arfa
--
Prima di rispondermi devi togliere le dita dal naso!!! :-)




I have tryed to adjust Vs.
In back of panel there it is a label that says: Vs=190V

I tried up to 195V but green dots does not disappears.
I also tried to adjust under 180V, and green dots decreases, but
together with screen brightness and detail...

If not capacitors, how I can try?

Thanks.




--
Prima di rispondermi devi togliere le dita dal naso!!! :-)