Question about Samsung PCN5425R 54" Rear Projection Television

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Projection TV My screen is showing a double image highlighted in blue. I am also having problems with the focus option, it will always stop focusing at 37 percent of the way. Can you please help me with these issues? It would be greatly appreciated. Thanks againg! Mark

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  • Mark Figueroa Jun 03, 2007

    premtech, thank you very much for your quick response. I will give a tech in the area to see how much they charge and have it done. I'll get back to you and let you know how things turn out. Thanks again!

  • Mark Figueroa Jun 03, 2007

    premtech, thank you very much for your quick response. I will give a tech in the area a call to see how much they will charge me and have it done. I'll get back to you and let you know how things turn out. Thanks again! Sorry about the typo the first time.

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William Rayburn

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Fame, The symptoms you're describing appear to be convergence failure and probably only one of the convergence amps. That unit uses two STK392-040 IC's and it is HIGHLY recommended that you replace both - not just the one. The convergence amps are mounted to a large aluminum heat sink with a heat sink compound for the greatest heat dissipation. My personal experience with this particular model has been that replacing the IC's only restored normal operation in 9 out of 10 sets as opposed to having to replace any other corresponding resistors or other components. In laymen's terms it's probably only the convergence IC's that need replacing. I strongly suggest that you not tackle this one by yourself unless your are fairly skilled at soldering. Too much heat on this multi-pin IC will destroy them and they're not cheap.. It's also a bit difficult getting the old ones out. If you don't do the job yourself find a good reapir shop and ask if they have the IC's in stock. If you're not sure where to find a reputable shop call NESDA, (National Electronic Service Dealers Assn.) They can refer you to a qualified member shop in your area... If you do tackle this yourself, order only the Sanyo originals from places like B&D Electronics, Vance Baldwin, ACME or Samsung. And use a fairly good heat-sink compound...

Posted on Jun 03, 2007

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1 Answer

I recently bought a samsung hcn4226w at a yard sale for $50. Thought it was a good deal, but when i got home I saw the picture had a double image and the picture doesn't seem bright. After some tinkering...
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1 Answer

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You will need to repair the convergence circuit to fix the double image. The second issue of the "perfect focus" stopping at 37% will be fixed at the same time. It is halting because the sensors detect no movement of the blue image. here is a link to the part number and how to purchase the board. http://www.partstore.com/Part/Samsung/Samsung/BP9500142E/New.aspx

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I recently bought a samsung hcn4226w at a yard sale for $50. Thought it was a good deal, but when i got home I saw the picture had a double image and the picture doesn't seem bright. After some tinkering...

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