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Zenith z42pj240 clicking/no power on/broken PDP

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    #1

    Zenith z42pj240 clicking/no power on/broken PDP

    I was just wondering if someone could help me static test the power board, control, or ysus on this set. The panel is completely destroyed, so I'm not sure what is possible.

    Have checked voltages at P103, and it seems like they are correct just before/after the relay click and turn off, which the set does about every minute or so. I also think I accidentally shorted across some of the pins at P103 with my probe while trying to test, but that just seemed to kick the relay again.

    I've seen where you can static test the PSU on this with two 100watt bulbs, but I'm wondering if there is a simpler way?

    thanks for any ideas.


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    #2
    Re: Zenith z42pj240 clicking/no power on/broken PDP

    Anyone? How about a general strategy to static test PSU on a broken panel plasma?

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      #3
      Re: Zenith z42pj240 clicking/no power on/broken PDP

      bud ? tom? can you help me out with this one?

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        #4
        Re: Zenith z42pj240 clicking/no power on/broken PDP

        Unplug the Y buffer, normally a cracked PDP can kill a Y buffer.
        Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

        https://www.facebook.com/Telford-Tel...7894576335359/

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          #5
          Re: Zenith z42pj240 clicking/no power on/broken PDP

          You can try connecting a 100W light bulb to the Vs and see if it lights up, but since Vs is 200V you will need a 240V bulb (a 120V one won't last long...)
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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            #6
            Re: Zenith z42pj240 clicking/no power on/broken PDP

            Thanks Tom. Is the light bulb supposed to simulate the connection to a properly working ysus, buffer, and panel?

            In another SM for a different model Zenith, I have seen a diagram showing two 100 watt light bulbs being hooked up together. Would that work (since I don't have a 240v bulb)?

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              #7
              Re: Zenith z42pj240 clicking/no power on/broken PDP

              You could also use two 120V bulbs yes.
              This is just a load test for the power supply. If it can light these the power supply is working ok.
              Va is harder to test, though I've never seen a power supply with faulty Va circuit yet. You could six 12V bulbs in series like car headlamps, most car headlamps have two filaments so you can wire them in series and use three bulbs as a 72V bulb on the 55V Va.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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                #8
                Re: Zenith z42pj240 clicking/no power on/broken PDP

                Thanks Tom. Since this is high voltage, I think I'm going to need some ideas on how to build a safe test rig, and one that I can attach to VS.

                Does anyone know of any plans out there?

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