[TechAssist] Re: Hitachi Model 50UX58B green convergence
- From: "becyn" <becyn@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 2 Sep 2004 11:34:19 -0400
sounds like you have a register overflow problem due to being on the extreme
end of the adjustment. An 8 bit register will go to 255 then will reset to
zero as you descibed it "swinging back".
This means that there is a more fundamental problem with the original
convergence. If a tube was replaced, it might be that the installer failed
to statically land the beam (with the neck mags) before he did the
convergence. this will cause EVERYTHING to be way off center adjust.
Jim McVey
McVey Alltronix
327 Broadway
Newburgh N.Y. 12550
Factory authorized
service for over 20
major brands.
845 561 8383
----- Original Message -----
From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 01, 2004 4:01 PM
Subject: [TechAssist] Hitachi Model 50UX58B green convergence
> Hi All....
>
>
> I have a 50UX58B that came to me with just the lower
> right corner out of convergence. I changed the STK and
> one resistor that had increased in value...but no
> help.
>
> The green also looks thick and out of focus at that
> corner, and appears to have hysterisis around the
> corner point: that is, when I adjust the line(H or V)
> toward alignment, it approaches, then will swing too
> far past correct position.
>
> The degree of distortion appears to be related to
> screen content as well...it moves in and out of the
> corner with scene changes, etc.
>
> Has any one seen this or anything similar with this
> set?
> I talked to Hitachi and the tech said "sorry... no
> silver bullet here."
>
>
> TIA
> Jim Shupe, CET
> Yucca Valley, CA
>
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