VIORE 32" - Power board problem?

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  • newtothis
    Badcaps Legend
    • Mar 2013
    • 1556
    • england

    #41
    Re: VIORE 32" - Power board problem?

    D prefix is a diode

    Comment

    • philliesfan30m
      Badcaps Veteran
      • Aug 2013
      • 542
      • USA

      #42
      Re: VIORE 32" - Power board problem?

      is that the only 1 on the board or is d1,2,and 3 the same thing? if they are the same what readings do you get on them? does your multimeter have a diode setting?

      Comment

      • sansonet
        Badcaps Veteran
        • Nov 2013
        • 236
        • US

        #43
        Re: VIORE 32" - Power board problem?

        Other two have different numbers written on them. Multimeter have diode/continuity settings and it shows 0 and beeps when first two leads connected off board, all 3 beeps when on board.

        Comment

        • philliesfan30m
          Badcaps Veteran
          • Aug 2013
          • 542
          • USA

          #44
          Re: VIORE 32" - Power board problem?

          you mean when you checked it not on the board it showed a different reading then when on the board?

          Comment

          • sansonet
            Badcaps Veteran
            • Nov 2013
            • 236
            • US

            #45
            Re: VIORE 32" - Power board problem?

            Originally posted by philliesfan30m
            you mean when you checked it not on the board it showed a different reading then when on the board?
            Yes, but since leads 1 and 3 are connected on circuit, it expected to be this way.

            Comment

            • philliesfan30m
              Badcaps Veteran
              • Aug 2013
              • 542
              • USA

              #46
              Re: VIORE 32" - Power board problem?

              can you put it in diode mode and put the black lead on pin 1 and red on 2 then 3 and give readings then put black on pin 2 and red on 1 and then 3 and give readings and then black on 3 and red on 1 then 2 and give readings?

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #47
                Re: VIORE 32" - Power board problem?

                OK, since you are getting the PS_ON OK but the 24v power supply did not turn on, you need to find out first if the PFC voltage booter is working or not since the 24v require 380~400VDC to run.
                Carefully check the dc voltage RIGHT AT THE TWO LEGS of the big blue cap (with RohS label) to see what the DC voltage is when TV is turn on, it should be about 160~170VDC when TV is OFF and about 380~400DVC when it is on.
                The switched 12v is generated by the same transformer that is generating the 5V.
                This SCH may be close to what you have on your board.
                Never mind, the SCH does not match your board.
                Attached Files
                Last edited by budm; 12-20-2013, 05:50 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

                • sansonet
                  Badcaps Veteran
                  • Nov 2013
                  • 236
                  • US

                  #48
                  Re: VIORE 32" - Power board problem?

                  Originally posted by philliesfan30m
                  can you put it in diode mode and put the black lead on pin 1 and red on 2 then 3 and give readings then put black on pin 2 and red on 1 and then 3 and give readings and then black on 3 and red on 1 then 2 and give readings?
                  Black1/red2 - 0
                  Red2/black1 - 0
                  Black1/red3 - 235
                  Black2/red3 - 235
                  Red1/black3 - no reading
                  Red2/black3 no reading

                  Comment

                  • sansonet
                    Badcaps Veteran
                    • Nov 2013
                    • 236
                    • US

                    #49
                    Re: VIORE 32" - Power board problem?

                    Originally posted by budm
                    OK, since you are getting the PS_ON OK but the 24v power supply did not turn on, you need to find out first if the PFC voltage booter is working or not since the 24v require 380~400VDC to run.
                    OK, I'll try this too, I need solder that rectifier back first.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #50
                      Re: VIORE 32" - Power board problem?

                      OK, this is what you have on your board.
                      Attached Files
                      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

                      • sansonet
                        Badcaps Veteran
                        • Nov 2013
                        • 236
                        • US

                        #51
                        Re: VIORE 32" - Power board problem?

                        Originally posted by budm
                        Carefully check the dc voltage RIGHT AT THE TWO LEGS of the big blue cap (with RohS label) to see what the DC voltage is when TV is turn on, it should be about 160~170VDC when TV is OFF and about 380~400DVC when it is on.
                        Should I do it with red multimeter probe on positive leg of capacitor and black probe grounded to metal part on TV? I just tried that and it reads about 30-50 when multimeter is set to 200m DCV. It have no readings when set to high voltage.

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #52
                          Re: VIORE 32" - Power board problem?

                          "Carefully check the dc voltage RIGHT AT THE TWO LEGS of the big blue cap"
                          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

                          • sansonet
                            Badcaps Veteran
                            • Nov 2013
                            • 236
                            • US

                            #53
                            Re: VIORE 32" - Power board problem?

                            Ok, it reads about 366V if I put probes on both legs.

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #54
                              Re: VIORE 32" - Power board problem?

                              OK, the PS_ON is good, the PFC voltage booster is good. Need to trace out the 24V, switched +5v and the switched +12V power supply circuits next.
                              Last edited by budm; 12-21-2013, 12:39 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

                              • sansonet
                                Badcaps Veteran
                                • Nov 2013
                                • 236
                                • US

                                #55
                                Re: VIORE 32" - Power board problem?

                                Originally posted by budm
                                OK, the PS_ON is good, the PFC voltage booster is good. Need to trace out the 24V, switched +5v and the switched +12V power supply circuits next.
                                How can I do it?

                                Comment

                                • budm
                                  Badcaps Legend
                                  • Feb 2010
                                  • 40746
                                  • USA

                                  #56
                                  Re: VIORE 32" - Power board problem?

                                  With lots of times.
                                  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

                                  • sansonet
                                    Badcaps Veteran
                                    • Nov 2013
                                    • 236
                                    • US

                                    #57
                                    Re: VIORE 32" - Power board problem?

                                    Should I just order board then? I don't think I'll have lot of time for it, and I hardly understand what I'm doing unless it something like testing and replacing bad caps (I'm just a plain housewife....)

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #58
                                      Re: VIORE 32" - Power board problem?

                                      At this point, yes, it will be really time consuming to troubleshoot down to component level for beginner.
                                      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

                                      • sansonet
                                        Badcaps Veteran
                                        • Nov 2013
                                        • 236
                                        • US

                                        #59
                                        Re: VIORE 32" - Power board problem?

                                        OK, thank you!

                                        Comment

                                        • sansonet
                                          Badcaps Veteran
                                          • Nov 2013
                                          • 236
                                          • US

                                          #60
                                          Re: VIORE 32" - Power board problem?

                                          Just got replacement board - it works now. Still wonder what was wrong with old one, but I guess I'll never know. I just want to thank everyone that helped me here!

                                          Comment

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