[TechAssist] Re: Zenith Z52Z95D 9-1690-1 Convergence repeat failure
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
- Date: Fri, 25 Jun 2004 08:45:12 -0700
On any convergence problem,or when I have to remove a picture tube for
repairs,I always center the Red and Blue Convergence adjustments.
Assuming the Green is centered,Cover the blue Picture tube.Adjust the Red
Convergence Completely Left to Right,and Up and Down.If it's distance from
the Green is greater in one direction than it is in it's opposite
direction,adjust the centering Magnetics to Equal them.IOW,if it adjusts
further Right than it does Left of the Green,adjudt the centering magnets
to equal the Right and Left distance.
Then Cover the Red,and check the BLue Convergence.
BTW,when I repair one of the Phililps/Magnavox Pix Tube Coolants,I check
the Convergence First before I remove the Green or Blue Tube.After
repairing and reinstalling the Tube,check the centering of that tube.The
centering magnets are easily moved.
Also,in the RCA/GE Splitter replacement,I have many times inadvertently
moved the centering magnets.
So checking the Centering of the Convergence adjustments really should be
done on any PTV repair
Peggs
At 12:19 PM 6/24/04, Ed wrote:
>Shaun, usually when the convergence ic's in zenith sets fail after a short
>time the Dc off sets are not properly set, and the convergence may look
>great, but the convergence ic's are driving the conv yokes too hard, causing
>the ic's to fail. If you cant find the procedure let me know i can probably
>dig it up, dont have it with me today. Basicly what you do is disable the
>conv correction by pressing the freeze button (i think ) with the cross
>hatch on, when you do that the red is offset to the right of green, and the
>blue is left of green, by how much i cant remember, if not set right, will
>cause the ic's to fail, it is adjusted with the centering magnets
> Ed Video Pro-Tech
> Mesa AZ----- Original Message -----
>From: "Shaun" <satguy@xxxxxxxxxxxxx>
>To: "tech" <techassist@xxxxxxxxxxxxx>
>Sent: Thursday, June 24, 2004 11:32 AM
>Subject: [TechAssist] Zenith Z52Z95D 9-1690-1 Convergence repeat failure
>
>
> > This set plays for about a week or two with a new 9-1690-1 module then it
> > fails. I already thought it is probably just Zenith sending me out
>defective
> > modules, but I just thought I would ask if there is anything I am missing
>on
> > the power supply module or any where else. When it fails it burns R1460 or
> > R1461 and sometimes burns R4162 or R4163 which means one or the other of
>the
> > STK392-110 goes bad. Thanks for any advise on this set.
> >
> > P.S. I am sending this message at 12:30 PM MST 6/24/04. Lately all the
> > messages I send don't show up for a long time so I am going to see when
>this
> > one posts.
> >
> > Shaun
> >
> > Advanced Electronics
> > 224 West Riverview Ave.
> > Fort Morgan, CO 80701
> >
> >
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