Panasonic Th46pz850U Picture/sound?

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  • alexanna
    Member
    • Mar 2010
    • 1346
    #1

    Panasonic Th46pz850U Picture/sound?

    On power on I have a solid red light all the fans are running.The panel is light very dimly,nothing is visible.

    Here is a link to the service manual.
    http://elektrotanya.com/?q=showresul...oria=&kat2=all
    I am not sure what this means but with the LDVS disconnected from the plasma panel, it lights up bright white
    This set has no sound or picture; I have attached the flow chart for no picture
    The d board has been replaced.
    The high voltage measurements are all within specifications. I have attached the normal voltages.
    I have voltage measurements on the P board connectors P12/P7/P6/and P25.
    Any ideas on how to proceed with this?
    Attached Files
    Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!
    Tags: None
    • selldoor
      Slow Learner
      • Dec 2010
      • 7870
      #2
      Re: Panasonic Th46pz850U Picture/sound?

      Hi - I know very little about plasma tvs - usually they have a zsus and ysus and first test is usual to unplug one then the other then both and see what happens, but I dont know on this which board is which.
      I have looked for fuses there are 3 on the sub power supply 2 fancy color striped ones ive not seen before and a red barrel. Couldnt see any on the other smaller boards though one has a few fusible resistors ( at least I think they are) Tom66 seems well versed in plasmas hopefully he will have a look at it.

      When you say no sound can we assume you have a sound source connected
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • retiredcaps
          Badcaps Legend
          • Apr 2010
          • 9271
          #3
          Re: Panasonic Th46pz850U Picture/sound?

          Originally posted by selldoor
          Tom66 seems well versed in plasmas hopefully he will have a look at it.
          I can vouch that Alexanna has paid it forward several times here by helping hundreds of people in the lcd computer display forum over the last 2.5 years so if anyone deserves some help, it is him.

          He's not like a few people who only come here for their own benefit and give nothing back.

          Unfortunately, while I can watch a plasma TV, my "experience" in fixing them is limited to reading threads by tom66 and budm.
          --- begin sig file ---

          If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

          We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

          Please do not post inline and offsite as they slow down the loading of pages.

          --- end sig file ---

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK
              #4
              Re: Panasonic Th46pz850U Picture/sound?

              A board is your fault -

              Does TV turn off with remote or do you have to unplug it?

              Check all crystals on the A board.
              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.

                Comment

                • alexanna
                  Member
                  • Mar 2010
                  • 1346
                  #5
                  Re: Panasonic Th46pz850U Picture/sound?

                  Originally posted by tom66
                  A board is your fault -

                  Does TV turn off with remote or do you have to unplug it?

                  Check all crystals on the A board.
                  I found another troubleshooting guide, and it is directing me to the “A" board like tom66 suggested.
                  Tom as far as checking the crystals I do not have assess to a oscilloscope .These crystals can not be that expensive I would be willing to try replacing them.
                  When I push the power button on the front of the set/ the red standby light stays red and the fans start spinning.The set needs to be unpluged to turn it off. I ordered a factory remote control and I have not had much luck getting it to work.
                  The numbers stamped on the crystals are:H25000k7 and 24.5Mnc9 would you help in finding a replacment.I am willing to give replacment a try.
                  Attached Files
                  Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

                    Comment

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