Question about Panasonic PT-47WX53 47" Rear Projection HDTV

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Dark Wavy Linew on Panny 47

Thanks for your response.
We are on the same page I think.
I am going to replace all the caps in the RC circuit around the convergence IC's.
I bought a "manual" on line, I GOT RIPPED OFF.
My manual has a shematic that is impossible to read
and the part #'s don't match the schematic.
Parts list has 3 digit ref #, the drawings have 4 digit ref #'s.

I think I found C7036 but cannot find c7054 on the schematic's that I have, but my drawings could be BS.

If you would please send me the A-board schematics and the parts list I WOULD BE MOST GRATEFUL.

Thanks in advance
Lonny
l_miller111@comcast.net

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The capacitors you seek are sitting right beside each other and are the same value. They are surface mounted caps, but I usually just cut the legs down on some pc mount caps and solder them right on top. This way, I don't even have to pull the board out.

Posted on Jan 07, 2009

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1 Answer

Picutre looks dark


Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.

The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded overs.

To get fixed either call in a local TV repair company or goto sites such as www.TvRepairKits.com to get a repair kit with instructions.

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1 Answer

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My experience has been that the resistors have fallen out of range. These aren't expensive and neither are the caps that surround this area. If you're pulling the board out to change the resistors, might as well change the caps, too. If you're strapped for cash, but have a multi-meter, you can test the caps and the resistors after they've been taken out of circuit to save a little green. Let me know if you need any help testing them; I'd be glad to help.

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maybe the convergence resistors? sometimes when the ics blow a resistor or a few blow

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Are the lines fine diagional across the screen and are they black in color.

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Found this person on eBay who repairs the hyperboard for $75 quickly with very positive feedback.
http://myworld.ebay.com/kcarrigan/
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That unit has a history of bad caps throughout the convergence and other circuits. Personally I believe it was an error in the design.... Check and/or replace the following::: C2451, C3007, C7022, C4613, C2507, C7060 all 100uf/16v and C7127, C7128, C7103, C7154, C7136, C3010, C3008, C3002 all 47uf/16v... You can use a higher voltage rated caps such as 35v or 50v for greater reliability.
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I would check the main power supply for a bad filter cap. That could cause the wavy lines. The different colors are probably a problem with the convergence circuit. Try resoldering the convergence ICs first. If that does not resolve it replace the ICs. Also check for low valued resistors in that same circuit or pico fuses.

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this is caused by a bad convergence module, and there are probably some dried out electrolytic caps in the circuit as well. i have one in the shop right now that came in with the same problem. if you have it serviced, make sure they replace all of the convergence modules (there are usually 2, but sometimes 3 of them), because if one went bad the other(s) is likely to go out soon as well.

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