Sony KDL-40W2000 3 LED Blnks Error

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  • StephenU
    Badcaps Veteran
    • Dec 2013
    • 230
    • United Kingdom

    #1

    Sony KDL-40W2000 3 LED Blnks Error

    Hi all looking for some help on repairing this old TV for a friend in work. Its a Sony KDL-40W2000 (Old LCD TV).
    Any Help Guidance would be much appreciated.

    TV has the LED error code 3 -
    UNREG10.5V, PANEL5V Voltage Trouble (DCALERT1).

    When power is applied and the power switch on tv is pressed you can hear the relay switching the LED goes from RED to Green for a brief couple of seconds then it goes into the flashing Red LED state. (3 blinks pause 3 blinks pause and so on.) On doing some reading up I've found:

    "" Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault.

    This is also a problem in the power supply circuit, check T603 and R672. (I cannot find these parts on the schematics at all most parts have the letter of the component and then 4 numbers.) ""

    I have attached a pic of connector CN6200 as I took some measurements from it but no voltages were present with the connector seated or unseated.
    Some pics are attached and I hope to get back to this tonight to get more pics and measurements

    I also found this thread: https://www.badcaps.net/forum/showth...hlight=40w2000

    Thanks in advance.

    S.
    Attached Files
  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12156
    • U.S.

    #2
    Re: Sony KDL-40W2000 3 LED Blnks Error

    Not even standby voltage, powerboard issue, you need at least the standby voltage to get started, check the fuse on powerboard if you didn't already.
    Last edited by nomoresonys; 08-09-2019, 04:54 AM.

    Comment

    • nomoresonys
      Badcaps Legend
      • Jan 2013
      • 12156
      • U.S.

      #3
      Re: Sony KDL-40W2000 3 LED Blnks Error

      Try with tv unplugged from power, unplug everything from powerboard, plug power cord into outlet, so only thing you are powering up is the powerboard, see if you have the standby voltage.
      Last edited by nomoresonys; 08-09-2019, 04:56 AM.

      Comment

      • nomoresonys
        Badcaps Legend
        • Jan 2013
        • 12156
        • U.S.

        #4
        Re: Sony KDL-40W2000 3 LED Blnks Error

        https://www.ebay.co.uk/itm/PSU-1-871...EAAOSwze9c0uRn

        Comment

        • nomoresonys
          Badcaps Legend
          • Jan 2013
          • 12156
          • U.S.

          #5
          Re: Sony KDL-40W2000 3 LED Blnks Error

          Are you sure you have the right schematics?

          Comment

          • StephenU
            Badcaps Veteran
            • Dec 2013
            • 230
            • United Kingdom

            #6
            Re: Sony KDL-40W2000 3 LED Blnks Error

            Watching this at the minute but would rather try do some debug on it to narrow it down to components rather than just swap out complete board if I can.

            Thanks for the reply nomoresonys

            Comment

            • StephenU
              Badcaps Veteran
              • Dec 2013
              • 230
              • United Kingdom

              #7
              Re: Sony KDL-40W2000 3 LED Blnks Error

              Yes i'm pretty sure they are the correct schematics, they came from here >>

              Comment

              • StephenU
                Badcaps Veteran
                • Dec 2013
                • 230
                • United Kingdom

                #8
                Re: Sony KDL-40W2000 3 LED Blnks Error

                Originally posted by nomoresonys
                Not even standby voltage, powerboard issue, you need at least the standby voltage to get started, check the fuse on powerboard if you didn't already.
                Gettting ~240v on both sides of the fuse - What i don't get is I get nothing on the standby 3v3 pin and i have a Red standby LED then goes to green when powered then, when failure occurs and 3 blinks code appears. I monitored pin 5 STBY+3.3V (CN6200) when on standby, green light and when 3 blink error is repeating, still nothing. DMM set too Auto range on VDC = 0.00v

                Originally posted by nomoresonys
                Try with tv unplugged from power, unplug everything from powerboard, plug power cord into outlet, so only thing you are powering up is the powerboard, see if you have the standby voltage.
                Will redo everything tonight again - if I can eliminate one board from another I will let him know what the price is with a board swap, just trying to keep the price down and get the TV back to him

                Thanks

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12156
                  • U.S.

                  #9
                  Re: Sony KDL-40W2000 3 LED Blnks Error

                  I see, something is amiss, can you try your meter on something else, to verify it's working correctly?

                  Comment

                  • StephenU
                    Badcaps Veteran
                    • Dec 2013
                    • 230
                    • United Kingdom

                    #10
                    Re: Sony KDL-40W2000 3 LED Blnks Error

                    Originally posted by nomoresonys
                    I see, something is amiss, can you try your meter on something else, to verify it's working correctly?
                    Its seeing the 240v input at both sides of the fuse when metered and on AC then switch to DC to take readings from connector but no voltage coming from pins.

                    Comment

                    • nomoresonys
                      Badcaps Legend
                      • Jan 2013
                      • 12156
                      • U.S.

                      #11
                      Re: Sony KDL-40W2000 3 LED Blnks Error

                      Ok, guess the first thing you need to do is get the standby circuit working. As a test try heating the powerboard with a hairdryer be sure to heat the capacitors on there too, see if tv comes on or anything changes.

                      Comment

                      • Diah
                        Badcaps Legend
                        • Feb 2013
                        • 6363
                        • Germany

                        #12
                        Re: Sony KDL-40W2000 3 LED Blnks Error

                        Originally posted by StephenU
                        Its seeing the 240v input at both sides of the fuse when metered and on AC then switch to DC to take readings from connector but no voltage coming from pins.
                        did you inspect the back side of the PSU of crack soldering point?
                        could you listed the voltage you have on all legs of IC6100. be sure the black probe on HOT area chassis

                        Comment

                        • R_J
                          Badcaps Legend
                          • Jun 2012
                          • 9535
                          • Canada

                          #13
                          Re: Sony KDL-40W2000 3 LED Blnks Error

                          If you are getting the led on the front of the tv and you here the relay click when you press the power button, you MUST have STBY3.3V. Check for the STBY on L6300 It will be there.
                          This is also a problem in the power supply circuit, check T603 and R672. (I cannot find these parts on the schematics at all most parts have the letter of the component and then 4 numbers.) ""
                          If you had an older SONY CRT you WOULD find these parts. This has NOTHING to do with this LCD tv. got to love the internet
                          Last edited by R_J; 08-09-2019, 08:50 AM.

                          Comment

                          • budm
                            Badcaps Legend
                            • Feb 2010
                            • 40746
                            • USA

                            #14
                            Re: Sony KDL-40W2000 3 LED Blnks Error

                            Originally posted by R_J
                            If you are getting the led on the front of the tv and you here the relay click when you press the power button, you MUST have STBY3.3V. Check for the STBY on L6300 It will be there.

                            If you had an older SONY CRT you WOULD find these parts. This has NOTHING to do with this LCD tv. got to love the internet
                            +1, no way you can have blinking LED if the STBY 3.3V is not present.
                            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

                            • R_J
                              Badcaps Legend
                              • Jun 2012
                              • 9535
                              • Canada

                              #15
                              Re: Sony KDL-40W2000 3 LED Blnks Error

                              There may be a problem with the panel, check if you have +5v on the t-con, Also disconnect the lvds cable between the t-con and the main and see if you get the same error.

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #16
                                Re: Sony KDL-40W2000 3 LED Blnks Error

                                Service manual:
                                https://www.manualslib.com/download/...l-40w2000.html
                                Error code 3-blink:
                                3 ) UNREG10.5V, PANEL5V Voltage Trouble (DCALERT
                                So perform test as RJ suggested.
                                Last edited by budm; 08-09-2019, 01:26 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

                                • Diah
                                  Badcaps Legend
                                  • Feb 2013
                                  • 6363
                                  • Germany

                                  #17
                                  Re: Sony KDL-40W2000 3 LED Blnks Error

                                  wrong
                                  3 error blink very wide at Sony platform not all listed on service manual are the case.. when 3.3V went grounded via IC6100 there other line continue feed the set to register error. this is from experience not SM.

                                  Comment

                                  • budm
                                    Badcaps Legend
                                    • Feb 2010
                                    • 40746
                                    • USA

                                    #18
                                    Re: Sony KDL-40W2000 3 LED Blnks Error

                                    Which board and at what page of the service manual IC6100 located?
                                    Attached Files
                                    Last edited by budm; 08-09-2019, 01:55 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

                                    • Diah
                                      Badcaps Legend
                                      • Feb 2013
                                      • 6363
                                      • Germany

                                      #19
                                      Re: Sony KDL-40W2000 3 LED Blnks Error

                                      look on the photo OP posted PSU 18 legs IC

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #20
                                        Re: Sony KDL-40W2000 3 LED Blnks Error

                                        SM manual page 60.
                                        So how does 3,3V STBY is grounded via IC6100? So you are saying the SMPS IC6100 (for the +18v, +15v, +10.5V, and +33V) is bad?
                                        I do not see STBY 3.3V feed the IC6100 which is in the HOT side.
                                        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

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