Question about Akai PDP4294 42 in. EDTV-Ready Plasma Television

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PDP4294 PowerSupply Components

Im looking to buy a replacment Capacitor for my power board. Cap model is SHINSHIN P0.22k400. Does anyone know where to find one.

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  • meadcorp Apr 21, 2008

    What would be the uf and Volts on a p0.22k400 orange Drop capacitor? I am assuming It would need a .0022uf at 400VDC.

  • meadcorp Apr 21, 2008

    It swelled and blew a nice whole through the side.

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For the life of me, I can not find those caps online. Anyone have a direct line to the item? Mine also blew out yesterday.

Posted on May 12, 2008

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You all are helpful thanks, i just don't have the knowledge to measure voltage, where, how etc.

Posted on May 08, 2008

  • Kris Luettchau
    Kris Luettchau May 14, 2008






    Here it is..!.

    That's funny, the pic above looks exactly like mine.
    I ordered mine from a Arizona company, it was 2.02$,should get here soon.
    T--(Thanks for the how to check the voltage post. these dont go in order back and forth, so sometimes it gets confusing)

  • Kris Luettchau
    Kris Luettchau May 14, 2008

    http://www.tubesandmore.com/

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I repaired my power board today. I replaced the same caps. There's two of them. Mine said Shin Shin P224K 400. Same thing. They are C523 and C524 located between the VS transformer and the two big power transistors. They are both inline before the VS transformer so being damaged, they have lowered the voltage to VS.

After replacing the caps, I got full power back to my PS. The only power that was affected was the VS which is suppose to be around 90v. It was only 68v. My black screen came back on. I think the value of the caps is either .022uf or .0022uf. I'm thinking more the .022uf. I don't think it is even .00022uf mentioned above.

Posted on May 08, 2008

  • Ter Xiong May 09, 2008

    It's very easy to measure the voltage. Sometimes requires a steady hand though. All you need is a multimeter or voltmeter. One can be had at Harbor Freight Tools for $3 which is very cheap for an ok multimeter. I have like three of them. They usually run $20 at normal retail. There is two probes. A black and a red. With the board in the tv and powered on, use the black probe to touch the aluminum backing of the tv set and with the red probe, you can use either of the white connectors at the top sides of your ps board because they have the same pins. They each are labeled like VS for each pin in the connector. Use the red probe to touch that pin. You should get a reading of around 90v. The voltages should be listed on the aluminum backing of the tv screen near the top right on a sticker. If you need the voltages just let me know.

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Any manufactures cap will do, www.jameco.com and www.digikey.com have a great supply of caps. Just make sure that the uf and volts match up and you will be fine.

Posted on Apr 21, 2008

  • Greg Steilen Apr 21, 2008

    You need a poly film ( orange dip) cap.. Digikey has the largest selection.



    http://search.digikey.com/scripts/DkSear...



    Its kind of late and my mind is a little slow, but it should be either the .0022uf or the .00022uf @ 400v. I will post back tommorrow when I think I get my mind back.



    Just curious, did this burn up? or how did you determine it was bad?

  • Greg Steilen Apr 24, 2008

    Yeah, I have only see that happen once, blew a nice puff of smoke as well. Normally they just short out and dont really show a sign unless other than on the meter. Was this right by the ac connection or floating on the hot side of the board.. Must have had a good spike as the cap is 400v.. Depending on its location, it should be sitting at either rough 200v or max 380.

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We have seen many large flat screen TVs do this. It is usually one or more bad capacitors on the power board.
  • A cap is a few bucks and easy to replace if you can desolder and solder.
  • You need to identify the bad capacitor.
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  • The small cross on the top of the cap usually splits when they go bad.
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Porblem solved,
It's a wonderful day.... Ahhhh, it is now FIXED and working great. I found cracked solder joints on a few of the switching power transistors and some of the big diodes and other heat producing parts. Also notice that the infamous Red caps C524 and C523 were discolored but they checked OK on my cap meter and also my ohm meter, however while I was inside the set after removing 1 million scews I decided to replace them anyway.
I hope that my repair success helps someone.
electricitym

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The capacitor C2250 was definately blown and easy to spot so I did some searching and found a replacement from an online electronics supplier that didn't require me to buy 200+ as Digitech wanted. Anyway I replaced the Cap and it still didn't work so I started looking and testing components again and found that the Diode D2250 was bad so replaced it as well and now the set works fine. Maybe this is what is wrong with your's and others as well.
It made sense for me to check the diode as it is right next to the cap that blew. https://www.mouser.com for the Cap and http://www.slelectronics.net/ for the Diode.
The specs for the Cap/ CERAMIC CAP. B K 1500pF/1KV
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The Power Supply Board is listed below. Please note, there are 2 models with the same beginning number (PDP4294). Verify your model number before selecting the Power Supply Board as each board is different depending on the model number.

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8a953f8.jpg

Here is my board that i ordered for replacement, as you can see, the top left second in --cap IS BLOWN. so i think i can either, use a cap from my other board into this and see if it works, or.....test out my current board, and use this board for parts.
any suggestions, that be great. As far as,... which diode.. maybe this can help. cheers.-- Goat

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