Question about Panasonic PT-47WX42 47" Rear Projection Television

2 Answers

Convergence problem not fixed after replacing STKs

I have a Panasonic PT-47WX42 47inch TV. The red beam went out of convergence. I replaced both ICs with STK392-150. But red is still out. Using the convergence menu, red adjusts vertically, but won't budge horizontally. On the left side of the screen it's in alignment, but across on the right it's way off.

Blue and green are ok.

Is there something else that should be replaced? It almost looks like a horizontal motor for the red beam has failed.

Posted by on

  • gdp1 Aug 20, 2008

    I just got the same problem with my blue color. It happened this week. I called a local repair shop and they think it could be the IC Chips. They said each chip is $50(I think there is 3 in this TV?) and $150 at a min for labor. How hard are the chips to replace?

  • mfoco Aug 23, 2008

    I found the chips easy to replace, but time-comsuming due to the number of pins involved. I woudn't want to try it if I'd not had prior experience with soldering.

    Still no response to the original question though. With 2 replaced STK392s, red is still not moving in horizontal alignment. What gives?

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2 Answers

Obviously this site wasn't worth bothering with

Posted on Aug 27, 2008

I found the chips easy to replace, but time-comsuming due to the number of pins involved. I woudn't want to try it if I'd not had prior experience with soldering.

Still no response to the original question though. With 2 replaced STK392s, red is still not moving in horizontal alignment. What gives?

Posted on Aug 23, 2008

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The three blinks indicates a convergence IC fault. The convergence ICs must be replaced with the manufacturer replacement part. Use only the original replacement part. Your set uses STK392-110 convergence ICs.
These ICs are mounted on a large heat sink. Yes, you can replace it yourself and save few hundred bucks. But you must be knowledgeable enough on how to solder, resolder and use a multimeter.
You will need:
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  3. Soldering iron
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  7. Small side cutter
Feel free to inform me if you decide to replace the ICs yourself

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