Trouble with Zenith Z32LC2DA

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  • glen4cindy
    Senior Member
    • Dec 2012
    • 52
    • United States

    #1

    Trouble with Zenith Z32LC2DA

    Hello,

    I am troubleshooting a Zenith Z32LC2DA TV.

    If I turn it on, and use it, it will play for 2 or 3 hours just fine. Then, the picture goes out, and starts displaying all sorts of strange patterns, from a black screen to different odd patterns, and this will continue for awhile.

    If I leave the TV sit awhile, it will play again for awhile before going back to the strange patterns.

    I do see a cap on the PS board that is bulging at the top, but, nothing more, all the rest look normal.

    I'm going to assume this will be a good place to start.

    Your opinions?
  • newtothis
    Badcaps Legend
    • Mar 2013
    • 1556
    • england

    #2
    Re: Trouble with Zenith Z32LC2DA

    Can you give us pictures of the boards and chassis and a pic of the cap that's bulging please

    Comment

    • glen4cindy
      Senior Member
      • Dec 2012
      • 52
      • United States

      #3
      Re: Trouble with Zenith Z32LC2DA

      Originally posted by newtothis
      Can you give us pictures of the boards and chassis and a pic of the cap that's bulging please
      Ok. Thanks. I've attached photos. In a couple of the photos, I've pointed to the cap I think might be suspect.






      Comment

      • newtothis
        Badcaps Legend
        • Mar 2013
        • 1556
        • england

        #4
        Re: Trouble with Zenith Z32LC2DA

        Yes that cap needs changing, start there and see what results you get.

        Post back once done

        Comment

        • glen4cindy
          Senior Member
          • Dec 2012
          • 52
          • United States

          #5
          Re: Trouble with Zenith Z32LC2DA

          Ok, I have it out, and it's a 1000 uF 16v cap.

          Is the 16v critical? I don't remember from my high school electronics class! That was a long time ago.

          If I remember correctly, a higher voltage rating will not harm.

          Please advise.

          Comment

          • newtothis
            Badcaps Legend
            • Mar 2013
            • 1556
            • england

            #6
            Re: Trouble with Zenith Z32LC2DA

            You must get the uF the same, Voltage is just what the cap can take at highest. Higher is fine

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: Trouble with Zenith Z32LC2DA

              You should also avoid capacitors from RadioShack and other generic shops as they are not suitable. Digikey, badcaps.net sell caps. Panasonic FM/FR/FC are recommended.
              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

              • glen4cindy
                Senior Member
                • Dec 2012
                • 52
                • United States

                #8
                Re: Trouble with Zenith Z32LC2DA

                Originally posted by tom66
                You should also avoid capacitors from RadioShack and other generic shops as they are not suitable. Digikey, badcaps.net sell caps. Panasonic FM/FR/FC are recommended.
                Unfortunately, I saw this post a little too late.

                I did get a cap from Radio Shack.

                The TV has been operating for almost 3 hours now, without shutting off like before, but, there now is a squeal coming from the Power Supply board.

                I am going to have to assume this is due to the cap from the Shack, as the squeal was not there before, but, the TV failed to operate for more than a couple of hours before going crazy.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: Trouble with Zenith Z32LC2DA

                  Well, you know you have fixed it. Therefore, I would go and buy the right capacitor. It will cost you less than 4 dollars from Digikey and give you many more years of life. If the Shack cap dies, it could cause further damage. If you need help ordering the right one let us know.
                  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

                  • glen4cindy
                    Senior Member
                    • Dec 2012
                    • 52
                    • United States

                    #10
                    Re: Trouble with Zenith Z32LC2DA

                    Originally posted by tom66
                    Well, you know you have fixed it. Therefore, I would go and buy the right capacitor. It will cost you less than 4 dollars from Digikey and give you many more years of life. If the Shack cap dies, it could cause further damage. If you need help ordering the right one let us know.
                    Yes, I might. The Digi-Key site is daunting.

                    I found this one. Looks right.

                    http://www.digikey.com/product-detai...73TB-ND/268458

                    Would a different one be more suitable?

                    Thanks.

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: Trouble with Zenith Z32LC2DA

                      I would suggest this device.
                      http://www.digikey.com/product-detai...2366-ND/613727

                      Panasonic FM low ESR long lifespan
                      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

                      • glen4cindy
                        Senior Member
                        • Dec 2012
                        • 52
                        • United States

                        #12
                        Re: Trouble with Zenith Z32LC2DA

                        Thanks.

                        I'll be ordering this from DigiKey and replacing the Radio Shack cap.

                        Any idea as to what might have caused the squeal? Crap capacitor from Radio Shack doing something weird?

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #13
                          Re: Trouble with Zenith Z32LC2DA

                          Yes, the capacitor could cause this.
                          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

                          • glen4cindy
                            Senior Member
                            • Dec 2012
                            • 52
                            • United States

                            #14
                            Re: Trouble with Zenith Z32LC2DA

                            I've replaced using the recommended capacitor from Digikey, and still have the squeal. The TV is still working however.

                            It is clear the squeal is coming from somewhere in the Power Supply Board. Any suggestions as to which cap it could be, or possibly another part?

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK

                              #15
                              Re: Trouble with Zenith Z32LC2DA

                              At a normal viewing distance, is the squeal audible? Sometimes parts can make this noise (coil whine) but it is an acceptable noise if the user can't hear it while watching TV. Try with the case on, too.
                              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

                              • glen4cindy
                                Senior Member
                                • Dec 2012
                                • 52
                                • United States

                                #16
                                Re: Trouble with Zenith Z32LC2DA

                                It may be. The only thing is, it was not there before the repair, but, the TV only functioned about 2 hours, and the cap was out of spec, so, being in spec now, might make a difference in the circuit.

                                Comment

                                • Ltank
                                  Badcaps Veteran
                                  • Jun 2013
                                  • 776
                                  • USA

                                  #17
                                  Re: Trouble with Zenith Z32LC2DA

                                  Here is a Service Manual
                                  Attached Files

                                  Comment

                                  • glen4cindy
                                    Senior Member
                                    • Dec 2012
                                    • 52
                                    • United States

                                    #18
                                    Re: Trouble with Zenith Z32LC2DA

                                    Thank you!

                                    This will be very helpful.

                                    Glen

                                    Comment

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