Question about JVC AV-48WP30 48" Rear Projection Television

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Red is all over the place but have a claer picture.

Red lines and red spots but clear picture.

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  • Carl Manaloto
    Carl Manaloto May 11, 2010

    Take a picture of the problem with a cell phone camera or a digital camera and then post it on this site. I will get a better understanding of the problem.




1 Answer

Its a convergence problem. I had the same problem you have to replace an av 110 chip in the tv.Mine was under warrenty so I had it fixed for free. Dont know what it costs otherwise.

Posted on Mar 17, 2008


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By placing your hand over the red lens you stop it's convergence with the other two colors by stopping it's light emmission. That tells you two things, (1) convergence of the red tube is way off; (2) it hasn't yet placed any load on the 20+/- supply line or the unit would be in shutdown. You'll need to have the convergence amps replaced though. ICz103 and ICz104 are a Samsung p/n#BP13-00006A or the more common equivlent Sanyo STK394-250 and you'll need two of those. Good idea to test and replace any of the feed resistors that may have changed in value also. If any of this sounds complicated take it to a reputable shop. Most shops may have the parts on-hand and it's not too expensive a repair. With the above info you'll at least be on some higher ground with the repair shops you call to see if they have the parts and how much they generally charge for convergence repair for your model. Good Luck Bill

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These are called retrace lines they occur because of the blanking pulse not turning off the electron guns in the picture tube during the retrace period. Since this is occuring with the red gun there may be a proble with the video circuitry connected to the red electron gun of the picture tube. This would include the red amp and the red driver transistors. You will need a schematic and a multimeter to properly test these items.

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