[TechAssist] Re: Mitsibishi VSA50 "convergence?"
- From: "Damon" <damon101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 3 Mar 2004 08:44:12 -0500
First, if you clik on image 36, then replace with 38 you can see both, if
you clik on the 2nd image it won't let you in.
Next, if you disconnect the convergence yokes, does this problem disappear
and you have a pincushion picture?? It looks almost like the deflection
voltage is re-writing the line again and again. It could be the horiz
circuit, although I have no idea how it could re-write so many times. One
thing I notice is that it does look synchronized/locked in place. Of course
you have checked the horiz/vert syncing, so another possiblity is that the
video could be writing at 10X (I doubt it) but you may want to match the
video at the CRT to the video generator's input, then try the convergence
outputs matched to the video generator too. That way, we know for sure what
is really out of whack here.
Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Gerald Gann" <alpha21century@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, March 02, 2004 3:55 PM
Subject: [TechAssist] Re: Mitsibishi VSA50 "convergence?"
> 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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