Question about JVC AV-48WP74 48" Rear Projection HDTV-Ready Television
I have the ghosting effect which I believe it
is a convergence malfunction.
The green, blue and red are are not overlaying
which looks like a 3d image.
How can this be fixed on a Panasonic PT-51HX41E?
I posted this in an eariler solution and there are numerous referencesto this type of problem on fixya.com, however it fits in this case, sohere it is:
This denotes a convergence problem. Believe it ornot it would be cheaper for you to replace the two convergenceamplifiers and the biasing resistors. You would not actually bereplacing the convergence board since these devices are usually locatedon the deflection board in most cases. However in answer to yourquestion, the boards are easily removed, depending on your level ofpatience (lots of cables to move around), I would also advise you toeither mark down all of the connection you will remove, or take picturesof the board and its connectors. If you choose to just replace theAmplifiers and the biasing resistors there is a lot of information onthis site on how to do so: This will get you started:
1) Unplug the TV and then get a schematic of the TV I use http://www.servicemanuals.net or http://www.manualsparadise.com
2) On the schematic locate the STK392-xxx series IC packs (or whatever Convergence ICs your set is using) (usually attached to a large heat sink)
3) determine if the STK392s are 110, 120 or 150.
4) if the STK392-xxx's are 110s replace with 110s (forget that upgrade stuff it is a hit or miss game that I don't believe you want to get into), if they are 120s replace with 120s and so on.
5)Nowto replace the STKs: remove the module from the TV and unsolder theoldSTKs along with the bias resistors, and replace them with the newones(be sure to apply heat sink paste to the STKs when attaching them to the heatsink)
6) make sure there are no short circuits form your soldering job.
7) Reinstall the module and then turn on the TV.
8) do manual adjustment and the auto-convergence test and then things should be back to normal.
I hope this helps
Posted on Feb 26, 2009
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Posted on Jan 02, 2017
SOURCE: Panasonic pt-51hx41e
This is a convergence output IC problem. convergence board (main Board) would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$300
Posted on Sep 27, 2009
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