Totally Dead TC-P50S30 Panasonic Plasma

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  • Michale32086
    New Member
    • Nov 2011
    • 1453
    • USA
    #1

    Totally Dead TC-P50S30 Panasonic Plasma

    This is going to take a bit of detail to explain...

    Got a Panasonic TC-P50S30 Plasma that was a lightning strike casualty..

    Totally dead as a doornail.. No lights, no LED, no power indicator, no nuttin..

    As I have mentioned previously, I am not much of a PCB troubleshooter. Frankly, I am a massive wimp when it comes to fiddling with boards, checking voltages and stuff while the TV is powered on... So, my "expertise" consists of visual inspections and the like...

    The TV has a metal box like device as the plug, a NOISE FILTER CIRCUIT. Pic #1

    Inspecting all the boards on the TV (Pic #2) there doesn't appear to be any char marks, no blown caps, no damage whatsoever... I have checked all the fuses on all the boards and they all check out fine. None blown...

    So, my first thought is that the Noise Filter doo-hicky is fried...

    Order a replacement. No luck.. Still as dead as a doornail..

    OK, so I am thinking Power Board... Replace that. No luck... Still dead..

    That's where I am at now..

    Now I am beginning to rethink my "repair" process. This is a really sweet Plasma, a newer model that is in excellent cosmetic condition. So I really don't want to just toss it..

    On the other hand, I really don't want to keep spinning the wheel hoping I hit the right board before I run out of $$$...

    So, now I am thinking that I might as well learn how to check power connections and voltages and what have you...

    I have only got a little rinky dink voltmeter that I use to just check continuity and voltages on laptop power adapters... So I guess my first question is going to be what kind of equipment should I buy that will allow me to safely check (emphasis on SAFELY) voltages....

    Another question I have is, what about bypassing the NOISE FILTER doo hickey and hook power directly to the Power PCB...

    Good idea???

    Bad idea???

    Totally frak'in moronic idea???

    Any hints, tips, suggestions would be greatly appreciated...
    Attached Files
    Last edited by Michale32086; 11-25-2014, 12:34 PM.
    Tags: None
    • KevinCro
      Senior Member
      • May 2014
      • 104
      • United States
      #2
      Re: Totally Dead TC-P50S30 Panasonic Plasma

      I would not bypass any component in the television. Does the power supply make any clicking noises? You will need a digital multimeter to test the voltages. I would measure the voltage going into the power supply board. Be sure to plug a working electrical appliance into the outlet that you are using to power the tv to make sure that the outlet is working. If you have power to the power supply board then you need to check the voltage coming out of the power supply. Be safe and do not touch any component in the tv with anything other than the test leads.

        Comment

        • Michale32086
          New Member
          • Nov 2011
          • 1453
          • USA
          #3
          Re: Totally Dead TC-P50S30 Panasonic Plasma

          No clicking, no indication whatsoever that the TV is plugged in...

          I am going to get a bit of a beefier volt meter from my shop.. Using this little one makes me nervous.

          I'll jump back on and follow up once I have a better volt meter..

          Thanx for the reply
          Attached Files

            Comment

            • selldoor
              Slow Learner
              • Dec 2010
              • 7870
              #4
              Re: Totally Dead TC-P50S30 Panasonic Plasma

              There is little you can do to ensure total safety use a RCD plu/socket is always a good start and just get into your mind to ask "is ths safe" we also suggest having someone on hand, just in case.

              Fix the dohickey back in place and check the mains socket works as Kevin suggests.

              First test will be to just plug it in and listen for any clicks.
              Next set you meter on 600vAC and put the black lead on the blue mains wire
              at the white connector and with the red probe touch the ends of the fuses.
              Unplug the set and report back.

              It may give you more confidence and get you used to testing if you have a dummy run with the set not plugged in


              EDIT your meter is not too bad and it is autoranging so you dont have to set it
              Instructions if you dont have them

              (If you have alligator clip extensions for your probes use one to fix the Black probe in place
              Last edited by selldoor; 11-25-2014, 02:24 PM.
              Please upload pictures using attachment function when ask for help on the repair
              http://www.badcaps.net/forum/showthread.php?t=39740

                Comment

                • Michale32086
                  New Member
                  • Nov 2011
                  • 1453
                  • USA
                  #5
                  Re: Totally Dead TC-P50S30 Panasonic Plasma

                  Originally posted by selldoor
                  There is little you can do to ensure total safety use a RCD plu/socket is always a good start and just get into your mind to ask "is ths safe" we also suggest having someone on hand, just in case.

                  Fix the dohickey back in place and check the mains socket works as Kevin suggests.

                  First test will be to just plug it in and listen for any clicks.
                  Next set you meter on 600vAC and put the black lead on the blue mains wire
                  at the white connector and with the red probe touch the ends of the fuses.
                  Unplug the set and report back.

                  It may give you more confidence and get you used to testing if you have a dummy run with the set not plugged in


                  EDIT your meter is not too bad and it is autoranging so you dont have to set it
                  Instructions if you dont have them

                  (If you have alligator clip extensions for your probes use one to fix the Black probe in place

                  This is exactly the step by step I need!! Many thanks...

                  Let me dig up some alligator clips and go to town on this puppy!!

                  Back in a bit...

                    Comment

                    • tw2005
                      Badcaps Legend
                      • Oct 2011
                      • 6458
                      • Australia
                      #6
                      Re: Totally Dead TC-P50S30 Panasonic Plasma

                      looking very much A-board, the front stdby LED is driven via 3.3v from A-board,

                        Comment

                        • Michale32086
                          New Member
                          • Nov 2011
                          • 1453
                          • USA
                          #7
                          Re: Totally Dead TC-P50S30 Panasonic Plasma

                          I had to move my daughter's TV onto the workbench..

                          I'll be putting the panasonic back on there in the morning.. My wife's home tomorrow so she can be my backup in case I do something stoopid..

                            Comment

                            • Michale32086
                              New Member
                              • Nov 2011
                              • 1453
                              • USA
                              #8
                              Re: Totally Dead TC-P50S30 Panasonic Plasma

                              OK Let's begin....

                              My wife is on stand-by. She has the phone in her hand and she has dialed 9-1-

                              I have the voltmeter set to DC and the probes are in place as per the pic.. I am still too much of a wimp to actually handle the probes.. Give me time.

                              Baby steps..
                              Attached Files

                                Comment

                                • tw2005
                                  Badcaps Legend
                                  • Oct 2011
                                  • 6458
                                  • Australia
                                  #9
                                  Re: Totally Dead TC-P50S30 Panasonic Plasma

                                  Originally posted by Michale32086
                                  OK Let's begin....

                                  My wife is on stand-by. She has the phone in her hand and she has dialed 9-1-

                                  I have the voltmeter set to DC and the probes are in place as per the pic.. I am still too much of a wimp to actually handle the probes.. Give me time.

                                  Baby steps..
                                  Ah, no. don't do that. you are on the AC mains and looking at it the same point so 0 it will read

                                  You need Volts Ac range and assuming you're US, it's 120V I think, I see no location in your profile.

                                  backprobe the brown and blue, that is move the probe from the fuse and insert in the other connector in that plug.

                                    Comment

                                    • Michale32086
                                      New Member
                                      • Nov 2011
                                      • 1453
                                      • USA
                                      #10
                                      Re: Totally Dead TC-P50S30 Panasonic Plasma

                                      Originally posted by tw2005
                                      Ah, no. don't do that. you are on the AC mains and looking at it the same point so 0 it will read

                                      You need Volts Ac range and assuming you're US, it's 120V I think, I see no location in your profile.

                                      backprobe the brown and blue, that is move the probe from the fuse and insert in the other connector in that plug.
                                      Glad I waited..

                                      OK I'll set the meter to AC and move the red probe from the fuse to the brown wire..

                                      Yea, I am in Florida, so 120V should be the reading...

                                      "Hold onto yer butts"
                                      -Samual L Jackson, JURASSIC PARK



                                      EDIT: Voltage is good. 120.6V
                                      Last edited by Michale32086; 11-26-2014, 07:49 AM.

                                        Comment

                                        • Michale32086
                                          New Member
                                          • Nov 2011
                                          • 1453
                                          • USA
                                          #11
                                          Re: Totally Dead TC-P50S30 Panasonic Plasma

                                          OK, I checked the voltage from the line (Blue and Brown) to the opposite end of the opposite fuse..

                                          120V-122V
                                          Attached Files

                                            Comment

                                            • tw2005
                                              Badcaps Legend
                                              • Oct 2011
                                              • 6458
                                              • Australia
                                              #12
                                              Re: Totally Dead TC-P50S30 Panasonic Plasma

                                              Originally posted by Michale32086
                                              Glad I waited..

                                              OK I'll set the meter to AC and move the red probe from the fuse to the brown wire..

                                              Yea, I am in Florida, so 120V should be the reading...

                                              "Hold onto yer butts"
                                              -Samual L Jackson, JURASSIC PARK



                                              EDIT: Voltage is good. 120.6V
                                              One problem with edit it does not show as an update in the forum, almost missed it and about to signoff. I expected you'd see mains volatge, do you have the service manual? can you locate on the A board(mainboard) connector A6, pin 6 and measure volts DC with respect to gnd (any mounting screw on that board) that's the 5v standby, I expect it will be present

                                                Comment

                                                • Michale32086
                                                  New Member
                                                  • Nov 2011
                                                  • 1453
                                                  • USA
                                                  #13
                                                  Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                  No manual.. Lemme look at the board... Thanx for hanging around a bit.. Very much appreciated...

                                                    Comment

                                                    • Michale32086
                                                      New Member
                                                      • Nov 2011
                                                      • 1453
                                                      • USA
                                                      #14
                                                      Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                      There is a connector marked P6.. It's one of only 3 connectors on the board, minus the obvious 2-pin power connectors...
                                                      Attached Files

                                                        Comment

                                                        • Michale32086
                                                          New Member
                                                          • Nov 2011
                                                          • 1453
                                                          • USA
                                                          #15
                                                          Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                          Also, this power board IS a replacement power board. With the old one in there, I had the exact same symptoms...

                                                          Just FYI

                                                            Comment

                                                            • tw2005
                                                              Badcaps Legend
                                                              • Oct 2011
                                                              • 6458
                                                              • Australia
                                                              #16
                                                              Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                              Originally posted by Michale32086
                                                              There is a connector marked P6.. It's one of only 3 connectors on the board, minus the obvious 2-pin power connectors...
                                                              Did you remove the lead ? the other end should be on the A board A6

                                                                Comment

                                                                • tw2005
                                                                  Badcaps Legend
                                                                  • Oct 2011
                                                                  • 6458
                                                                  • Australia
                                                                  #17
                                                                  Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                                  Originally posted by Michale32086
                                                                  Also, this power board IS a replacement power board. With the old one in there, I had the exact same symptoms...

                                                                  Just FYI
                                                                  It's going to be A board, that's why the PSu replacement did not work.(what I'm expecting)

                                                                    Comment

                                                                    • tw2005
                                                                      Badcaps Legend
                                                                      • Oct 2011
                                                                      • 6458
                                                                      • Australia
                                                                      #18
                                                                      Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                                      Originally posted by Michale32086
                                                                      No manual.. Lemme look at the board... Thanx for hanging around a bit.. Very much appreciated...
                                                                      .
                                                                      Attached Files
                                                                      Last edited by tw2005; 11-26-2014, 08:19 AM.

                                                                        Comment

                                                                        • Michale32086
                                                                          New Member
                                                                          • Nov 2011
                                                                          • 1453
                                                                          • USA
                                                                          #19
                                                                          Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                                          Ahhh.. OK.. Let me check that.. My bust...

                                                                            Comment

                                                                            • Michale32086
                                                                              New Member
                                                                              • Nov 2011
                                                                              • 1453
                                                                              • USA
                                                                              #20
                                                                              Re: Totally Dead TC-P50S30 Panasonic Plasma

                                                                              Ok, found the A6 connector..

                                                                              Pin 6, meter on AC, no voltage...

                                                                              Meter on DC 4.99V
                                                                              Attached Files

                                                                                Comment

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