Panasonic TC-32LX85 power relay cycling, now dead.

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • waitery
    Senior Member
    • Feb 2011
    • 69
    #1

    Panasonic TC-32LX85 power relay cycling, now dead.

    Hi everyone, I have a Panasonic TC-32LX85 that over the past week had a relay that started cycling really bad upon starting the set. This is not your usual Panasonic led blink error code issue, this was the relay turning over every second for minutes on end. Since yesterday, the set is now totally dead and shows no signs of life. I took the back off to get at the power board and checked the fuse and it still has continuity and very low resistance, so no issues there. Caps all look good and there are also no outward signs of issues (scorch marks, burned components, etc)

    I did try and take some measurements on the standby5v line and other lines on the rail, but I have no voltages there. The power board number is TNPA4484 and pictures are below.

    Any thoughts on how I can proceed troubleshooting this would be great.
    Last edited by waitery; 05-27-2013, 09:39 PM.
    Tags: None
    • waitery
      Senior Member
      • Feb 2011
      • 69
      #2
      Re: Panasonic TC-32LX85 power relay cycling, now dead.

      Here are the pics of the power board, both front and back.
      Attached Files

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Panasonic TC-32LX85 power relay cycling, now dead.

          You may want to download the service manual for it first:
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • kevinm34232
              Badcaps Legend
              • May 2012
              • 1884
              • USA
              #4
              Re: Panasonic TC-32LX85 power relay cycling, now dead.

              Wrong thread disregard..
              Last edited by kevinm34232; 09-29-2014, 05:34 PM.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA
                  #5
                  Re: Panasonic TC-32LX85 power relay cycling, now dead.

                  I think you should remove that E-mail! he may get lots of junk mails.

                  Last edited by budm; 09-29-2014, 05:35 PM.
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • sam_sam_sam
                      Mitsubishi CNC switching power supply board dead / relay board bad diode failure
                      by sam_sam_sam
                      I was working on this CNC machine today found no keyboard functioning no control relay powering on
                      The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board

                      Found shorted diodes on main controller relays there are 3 of them that...
                      01-07-2023, 05:43 PM
                    • Tynan Dill
                      Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                      by Tynan Dill
                      I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                      Upon bringing it home and plugging it up, it showed a standby light.

                      I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                      The screen seems to blackout and stay black, but with a flashlight I can see the display.

                      With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                      Assuming...
                      ORIGINAL POWER SUPPLY BOARD
                      7 Photos
                      11-22-2024, 01:46 PM
                    • Journey11
                      Samsung TV won't turn on ... keeps cycling the power relay on & off
                      by Journey11
                      Hi All,
                      First time posting here ... my name is Kevin but my friends call me Journey.
                      I have a Samsung 75" LCD model UN75RU8000FXZA that I don't remember the original fault other than it wouldn't power up anymore.
                      After it sat for many month's I decide to look at it again. The motherboard seemed to have power regulation issues. After much fussing I decided to just get a new MB.
                      It came a few days ago and I installed it now just cycles the power relay on and off ... when on the backlights light up and then dim and then relay kicks off and the whole things starts again....
                      07-04-2024, 02:44 PM
                    • PantherDave
                      Microsoft Surface Pro (5th gen) model 1796 - no power
                      by PantherDave
                      Hi all!

                      I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅

                      I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
                      https://www.badcaps.net/forum/troubl...-hardware-devi...
                      05-29-2024, 02:01 PM
                    • beetle1303
                      Carver CM-1090 - Power relay clicking on & off, then fuse blown after 20-30 seconds of power cycling.
                      by beetle1303
                      I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.

                      On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off...
                      3 Photos
                      01-13-2025, 08:49 PM
                    • Loading...
                    • No more items.
                    Working...