RCA Capacitors Failed - What Size To Buy?

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  • PBH
    Member
    • Oct 2015
    • 12
    • Canada

    #1

    RCA Capacitors Failed - What Size To Buy?

    Noob member here, I would appreciate any help you might be able to dispense.

    My 32" RCA TV is acting up. I use this as a spare and it's connected to an antenna, I get a dozen decent HD channels.

    The TV turns on and works on one channel. I can't change anything, not the volume, not the channel, not the input selection, no mute, nothing. Neither the remote nor the side panel buttons do anything. Occasionally it turns itself off after about five minutes.

    Model RLDED3258A-B

    When I opened it up, four capacitors have blown up on the CV318H-K board, there are oil drops inside the TV and on the perimeter.

    My problem is the caps that blew up have no info on them, so I don't know what to replace them with...

    Sorry, just saw the sticky about putting the model # in the title, but it's too late...

    Anyone know what I need to buy?
    Attached Files
    Last edited by PBH; 10-16-2015, 10:45 AM.
  • PBH
    Member
    • Oct 2015
    • 12
    • Canada

    #2
    Re: RCA Capacitors Failed - What Size To Buy?

    I just peeled the cover off, they are inductors, I suspect they fine.

    I need to find the blown capacitor now...

    Comment

    • ReeceyBurger123
      Never Give Up !
      • May 2014
      • 7325
      • Britain

      #3
      Re: RCA Capacitors Failed - What Size To Buy?

      Those arnt capacitors they are coils, they wont normally ever fail.
      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/

      Comment

      • ReeceyBurger123
        Never Give Up !
        • May 2014
        • 7325
        • Britain

        #4
        Re: RCA Capacitors Failed - What Size To Buy?

        I would say the epprom which holds the software flash on the mainboard has corrupt.
        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/

        Comment

        • PBH
          Member
          • Oct 2015
          • 12
          • Canada

          #5
          Re: RCA Capacitors Failed - What Size To Buy?

          Originally posted by ReeceyBurger123
          I would say the epprom which holds the software flash on the mainboard has corrupt.
          The only reason I would disagree, is that the TV works occasionally.

          If it is the EPROM is it repairable?

          Comment

          • ReeceyBurger123
            Never Give Up !
            • May 2014
            • 7325
            • Britain

            #6
            Re: RCA Capacitors Failed - What Size To Buy?

            The software on these can become less functional over time which is due to the epprom.
            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/

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: RCA Capacitors Failed - What Size To Buy?

              BTW, those 4 inductors are the output filters for the Class D Audio power amplifiers IC TPA3110 which drives the speakers, nothing to do with the problem you have. Main board problem.
              Last edited by budm; 10-16-2015, 11:25 AM.
              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

              • PBH
                Member
                • Oct 2015
                • 12
                • Canada

                #8
                Re: RCA Capacitors Failed - What Size To Buy?

                So I should try a $15 U10 EEPROM?

                Comment

                • PBH
                  Member
                  • Oct 2015
                  • 12
                  • Canada

                  #9
                  Re: RCA Capacitors Failed - What Size To Buy?

                  Actually, what I should be asking is this: Which board is likely the source of my problems if the TV works but the side buttons and the remote don't?

                  Is this likely the EPROM on the main video board?

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #10
                    Re: RCA Capacitors Failed - What Size To Buy?

                    Can we see the whole back side of the TV so we can see all the boards?
                    Did you look at the bottom side of the board to see if there are any damages?
                    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

                    • PBH
                      Member
                      • Oct 2015
                      • 12
                      • Canada

                      #11
                      Re: RCA Capacitors Failed - What Size To Buy?

                      No damage on the bottom.

                      I will post more pics tomorrow.

                      I appreciate the help I'm getting here...thank-you.

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #12
                        Re: RCA Capacitors Failed - What Size To Buy?

                        We know that the standby power supplies are working, so now you need to find out if the PFC Voltage booster circuit is working and puts out 400VDC (measured right between the two legs of the main filter cap) to feed the 12VDC/24VDC SMPS power supply section or not.
                        You will be making measurement in the HOT DEADLY side of the circuit so take good precaution to protection yourself.
                        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

                        • PBH
                          Member
                          • Oct 2015
                          • 12
                          • Canada

                          #13
                          Re: RCA Capacitors Failed - What Size To Buy?

                          So here is the 'entire' TV. I had a good look at the circuit boards on both sides, no burnt marks, no signs of failed capacitors.

                          Re-assembling the board I removed I realized one of the connectors was not keyed and can fit in multiple positions, so, yes, I'm an idiot. I need to sort that out before I power the TV up again...
                          Attached Files

                          Comment

                          • mockingbird
                            Badcaps Legend
                            • Dec 2008
                            • 5484
                            • -

                            #14
                            Re: RCA Capacitors Failed - What Size To Buy?

                            You need to replace the capacitors on your Power Supply board.

                            It looks like yours has Capxon KF and KG series which are known defective series. Please post a list here of the capacitors in the following format:

                            1) Voltage, Capacitance, Diameter (width x height), Series

                            ...and someone should get back to you with a list of replacements.

                            Comment

                            • clapp
                              New Member
                              • Oct 2015
                              • 4
                              • canada

                              #15
                              Re: RCA Capacitors Failed - What Size To Buy?

                              Originally posted by mockingbird
                              You need to replace the capacitors on your Power Supply board.

                              It looks like yours has Capxon KF and KG series which are known defective series. Please post a list here of the capacitors in the following format:

                              1) Voltage, Capacitance, Diameter (width x height), Series

                              ...and someone should get back to you with a list of replacements.


                              To be Honest his problem doesn't seem to be related to ESR or caps in general
                              he said his TV works but remote and buttons don't work.
                              this is either a problem with the remote circuit or the main board on the TV.

                              I had the same issue with a Sharp TV a while ago.

                              Comment

                              • PBH
                                Member
                                • Oct 2015
                                • 12
                                • Canada

                                #16
                                Re: RCA Capacitors Failed - What Size To Buy?

                                First problem, I think this is the correct location for the plug, but since it's not keyed (and I was too dumb to notice)...

                                Any suggestions how to confirm I have this right?

                                I need to sort this out to power the TV up and measure the voltages.
                                Attached Files
                                Last edited by PBH; 10-21-2015, 10:20 AM.

                                Comment

                                • PBH
                                  Member
                                  • Oct 2015
                                  • 12
                                  • Canada

                                  #17
                                  Re: RCA Capacitors Failed - What Size To Buy?

                                  The caps are

                                  470uF 15V
                                  56uF 100V
                                  680uF 25V
                                  470uF 25V
                                  470uF 35V

                                  None of these have any visual signs of failure. But then again, 'something' distributed an oily residue inside my TV.
                                  Last edited by PBH; 10-21-2015, 10:32 AM.

                                  Comment

                                  • mockingbird
                                    Badcaps Legend
                                    • Dec 2008
                                    • 5484
                                    • -

                                    #18
                                    Re: RCA Capacitors Failed - What Size To Buy?

                                    Originally posted by clapp
                                    To be Honest his problem doesn't seem to be related to ESR or caps in general
                                    He said:
                                    Originally posted by PBH
                                    Occasionally it turns itself off after about five minutes.
                                    Which does sound like a PSU capacitor problem. You're right though that the other symptoms could be indicative of something else.
                                    Originally posted by PBH
                                    The caps are ...
                                    Please follow the instructions.

                                    As for the caps not showing actual signs of failure, CapXon don't necessarily always bloat when something is wrong.

                                    Comment

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