Toshiba 32A3000P inverter problem!

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  • nathaniel
    Member
    • Jan 2013
    • 35
    • israel

    #1

    Toshiba 32A3000P inverter problem!

    hello everyone

    got this LCD recently from a friend , the TV has sound but no pic and no backlight.

    i dissasmbled the screen and found that there are two blown caps on the inverter board (6632L-0420A )and also it seems like the transformers has been replaced .

    what is your expeirience would replacing the caps solve the problem or a kit i've seen on Ebay :

    http://www.ebay.com/itm/271185516140...9#ht_762wt_932

    or the complete borad should be replaced.



    thank you very much for your time...
    Attached Files
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Toshiba 32A3000P inverter problem!

    Some info (not sure how true this is):
    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

    • nathaniel
      Member
      • Jan 2013
      • 35
      • israel

      #3
      Re: Toshiba 32A3000P inverter problem!

      tnx for the quick reply.

      just wondering is it a fix or just prevanting the problem to occur on a working set. (since the caps on mine are already blown? )

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Toshiba 32A3000P inverter problem!

        Blown caps will definitely cause flickering or no backlight. Replace them with Panasonic FC, FM or FR, available from Digi-Key, Farnell/Element14 or eBay (make sure to avoid fakes!) The capacitors in the eBay auction are cheap replacements and will likely fail quickly.
        Last edited by tom66; 09-23-2013, 03:05 PM.
        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

        • nathaniel
          Member
          • Jan 2013
          • 35
          • israel

          #5
          Re: Toshiba 32A3000P inverter problem!

          o.k tnx i'll try to replace the caps first.

          digi-key are too expensive on shipping (44$) ???

          Comment

          • Caleb
            Smokin IC's
            • Feb 2013
            • 645
            • USA

            #6
            Re: Toshiba 32A3000P inverter problem!

            you can select small order usps for about 4$
            edit never mind just noticed you are not in the states
            Last edited by Caleb; 09-25-2013, 10:16 AM.
            Liberating magic smoke one part at a time

            Comment

            • nathaniel
              Member
              • Jan 2013
              • 35
              • israel

              #7
              Re: Toshiba 32A3000P inverter problem!

              UPDATE: hi guys , i got the two caps replaced with new ones - but still no backlight

              could it be one of the light tubes that causes no light (as in pc monitors)?
              what should i do next at your opinion ?

              TNX

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Toshiba 32A3000P inverter problem!

                Do you have stable 24V going to the inverters?
                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

                • Glitcher
                  Badcaps Veteran
                  • Mar 2013
                  • 673
                  • USa

                  #9
                  Re: Toshiba 32A3000P inverter problem!

                  I would also check all the MOSFETS on the inverter boards to see if they are shorted.

                  Comment

                  • nathaniel
                    Member
                    • Jan 2013
                    • 35
                    • israel

                    #10
                    Re: Toshiba 32A3000P inverter problem!

                    thanks for the quick reply

                    i just tested it - seems perfect ...
                    it has 5 VIN and 5 GND tested them all 24.0v

                    stupid questions: is there any fuses on this board? (i only recognize a fuse when i see a standard glass type)
                    Attached Files

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: Toshiba 32A3000P inverter problem!

                      The fuse is the white cuboid/rectangle with gold ends, marked on board F1 12A near the power connector.
                      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

                      • nathaniel
                        Member
                        • Jan 2013
                        • 35
                        • israel

                        #12
                        Re: Toshiba 32A3000P inverter problem!

                        the MOSFETs all have same resault (not shorted - BUT tested onboard is it ok?)

                        the fuse also checks out OK (learned somthing new today

                        Comment

                        • nathaniel
                          Member
                          • Jan 2013
                          • 35
                          • israel

                          #13
                          Re: Toshiba 32A3000P inverter problem!

                          is there anything else to check?

                          if i get an inverter card - is it 100% solution or it still can be another card or the CCFL ?

                          thanks

                          Comment

                          • truep
                            Badcaps Veteran
                            • Aug 2010
                            • 373
                            • USA

                            #14
                            Re: Toshiba 32A3000P inverter problem!

                            Does this set have a slave inverter on the other side from this one?

                            Comment

                            • nathaniel
                              Member
                              • Jan 2013
                              • 35
                              • israel

                              #15
                              Re: Toshiba 32A3000P inverter problem!

                              no - only one that is connected to both ccfl

                              Comment

                              • nathaniel
                                Member
                                • Jan 2013
                                • 35
                                • israel

                                #16
                                Re: Toshiba 32A3000P inverter problem!

                                any sugestions? please....

                                Comment

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