[TechAssist] Re: Mitsibishi VSA50 "convergence?"
- From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 3 Mar 2004 06:40:54 -0600
No change between new/old STKs.
The picture doesn't really capture this. The circle is easier to see. It
looks like sive waves going thru the picture. The circle isn't a continuous
line, but dots that go all over
You can actually see the "sine" wave especialy at the bottom. The sides are
straight, well, pretty much.
My first thought: The older direct view sets with a series pass regulator
and a bad pump up cap-were you could see the 120Hz ripple on the left side
of the screen...
Wayne Vanaman
Omega Electronics
6904 W Fairfield Dr
Pensacola, Fl. 32506-3310
Wayne@xxxxxxxxxxxxxxxxxxxxx
WWW.PensacolaTVRepair.Com
850-456-5995 voice
850-458-6369 fax
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, March 02, 2004 3:58 PM
Subject: [TechAssist] Re: Mitsibishi VSA50 "convergence?"
> Gerald, I got to it so I sent the page on to you. May come as attachment.
It's a crosshatch
> pattern that looks like absolutely no converg. correction. Like shorted
STK's, but he changed
> them. Question: what did the crosshatch look like with the orig. STK's in?
Any difference?
> Phil
> Phil Bader
>
> Gerald Gann wrote:
>
> > Wayne I tryed to look at your images and it said (you are not authorized
to view this page).
> > Jerry
> >
> > Alpha 21 Electronics
> >
> > Granite City, IL 62040
> >
> > Ph. 618-452-8620
> >
> > Fax 618-876-5157
> > www.alpha21century@xxxxxxxxxxxxx
> >
> > Doug Keller <dek@xxxxxxxxxxxxxx> wrote:
> > Crank up hendrix and pass the bong.
> >
> > Doug Keller
> > Wis-Kel Electronics
> > 101 Freeland Ave.
> > Terra Alta, WV
> > USA 26764
> > dek@xxxxxxxxxxxxxx
> > http://www.tech-assist.org
> > "Learn from the mistakes of others, because you
> > won't live long enough to make them all yourself"
> >
> > Wayne Vanaman wrote:
> >
> > >I have a Mitsibishi VSA50 HD PTV that looks as if it has a convergence
> > >problem. I have
> > >the manual, replaced the convergence ICs. I don't know how to explain
what
> > >I see.. It looks as if the lines/dots are crawling, like waveforms out
of
> > >phase, or a lissajous pattern.
> > >
> > >Here are two pictures:
> > >
> > >www.pensacolatvrepair.com/images/IMAG0036.JPG 327K Window Circle.
> > >
> > >www.pensacolatvrepair.com/images/IMAG0038.JPG 517K Crosshatch
> > >
> > >The video output on the back is good, this anomoly is in all modes, all
> > >inputs, cable, video, HD, everywhere.
> > >I thought the waveforms might be power supply ripple, but the power
supplies
> > >all seem to be good. Scopeing the vertical or horizontal while syncing
to
> > >the generator looks as if the set is in sync vertical and horizontal.
> > >
> > >
> > >Wayne Vanaman
> > >Omega Electronics
> > >6904 W Fairfield Dr
> > >Pensacola, Fl. 32506-3310
> > >
> > >Wayne@xxxxxxxxxxxxxxxxxxxxx
> > >WWW.PensacolaTVRepair.Com
> > >
> > >850-456-5995 voice
> > >850-458-6369 fax
> > >
> > >
> >
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> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
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