TC-P50VT20 10 Blink Code

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • tw2005
    Badcaps Legend
    • Oct 2011
    • 6457
    • Australia

    #21
    Re: TC-P50VT20 10 Blink Code

    Originally posted by Katzat
    I figured out that the SU and SD boards are the buffer boards. The test points on my board were different than those shown in the Troubleshooting handbook, but I was able to do the tests from the pinouts and got roughly the readings specified.

    The 5V_F reading on the SD board was roughly 10 MOhm Rather than the 5.7, but it was definitely not shorted.

    As soon as I hear from you regarding the troubleshooting anomaly above, I'll wrap this up and send this for rebuild.
    There's three resistance test points to test. Vfo is a good one to check as it will go short on a bad board in most cases

    Comment

    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6457
      • Australia

      #22
      Re: TC-P50VT20 10 Blink Code

      Originally posted by Katzat
      TW, I hate to bother you again, but I was reading through the Troubleshooting handbook you gave me trying to find the word Buffer (to test the buffer resistance) and I couldn't find it. Is there another word for buffer or a specific page for that procedure.

      Also, as I was pouring through that manual, I found it was WAY more useful than the similar manual I have for my specific TV. It actually has a 10 Blink Code troubleshooting procedure. So, just for fun, I decided to run through it just to prove what I think I already know (that the SC Board is bad).

      But when I run the procedure on page 53, I get to the point where I disconnect SC20 and power the unit on, and I still get the 10 blink code. according to the procedure, it would appear that my problem is in the A Board based on that. If the SC Board is the culprit, the procedure says the LED should blink 6 times with SC20 Disconnected.

      Is this an error in the procedure or is the VT20 different than the G series TVs?
      Well for me if you found 6 shorted out IGBTs on the SC board then there's really nothing more to be said about that.

      Of course I'm relying on data you have posted but all the ones you say are shorted are generally always shorted when these boards fail.

      What you're worried about I presume is , is it really causing 10 blink.

      It's definitely known to cause 10 blink, and we know it's bad.

      So where are we heading now? Looking for a second board that failed?

      Possible I guess, I have had a blown SS board and a faulty A-board in one TV.

      I guess I'll have to come up with a way to prove it is not.

      If It was the 2D model I have an easy way but this has a d-board so i'll have to think about it.
      Last edited by tw2005; 05-03-2016, 01:21 AM.

      Comment

      • tw2005
        Badcaps Legend
        • Oct 2011
        • 6457
        • Australia

        #23
        Re: TC-P50VT20 10 Blink Code

        Step 1:

        Is there a short circuit of the Vsus, Vda, or P15V? Follow the procedure on page 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading.

        what resistance values do you get particularly on the P15V and, Vsus (across the SC2 pins).
        Last edited by tw2005; 05-03-2016, 01:38 AM.

        Comment

        • tw2005
          Badcaps Legend
          • Oct 2011
          • 6457
          • Australia

          #24
          Re: TC-P50VT20 10 Blink Code

          Try this.

          TV off.

          disconnect:

          SC board
          SC2, Sc20,

          SS board:
          ss11,

          P-board:
          P35, P65,

          D-board:
          D31,D32,D33,D34

          turn the TV on, I expect the fans will be running if it's on.

          Once you've confirmed a result, turn it off and leave it for about 10 mins before you reconnect any of those leads especially P35,P65 or you can arc the panel due to residual voltage.

          Comment

          • Katzat
            Member
            • Mar 2016
            • 23
            • USA

            #25
            Re: TC-P50VT20 10 Blink Code

            Originally posted by tw2005
            Step 1:

            Is there a short circuit of the Vsus, Vda, or P15V? Follow the procedure on page 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading.

            what resistance values do you get particularly on the P15V and, Vsus (across the SC2 pins).
            I did that test as well. All was good according to the manual. All more that 1kOhm.

            Comment

            • Katzat
              Member
              • Mar 2016
              • 23
              • USA

              #26
              Re: TC-P50VT20 10 Blink Code

              Originally posted by tw2005
              Well for me if you found 6 shorted out IGBTs on the SC board then there's really nothing more to be said about that.

              Of course I'm relying on data you have posted but all the ones you say are shorted are generally always shorted when these boards fail.

              What you're worried about I presume is , is it really causing 10 blink.

              It's definitely known to cause 10 blink, and we know it's bad.

              So where are we heading now? Looking for a second board that failed?

              Possible I guess, I have had a blown SS board and a faulty A-board in one TV.

              I guess I'll have to come up with a way to prove it is not.

              If It was the 2D model I have an easy way but this has a d-board so i'll have to think about it.
              Since I know the SC Board is toast in all the normal places, I think I'll just send that one for repair and fix something else if if necessary after that's fixed.

              Comment

              • tw2005
                Badcaps Legend
                • Oct 2011
                • 6457
                • Australia

                #27
                Re: TC-P50VT20 10 Blink Code

                Originally posted by Katzat
                I did that test as well. All was good according to the manual. All more that 1kOhm.
                SC2 can read 300k-over 2 megohms so it would be interesting to know the measured value.

                A generic value of 1k or over being classified as not shorted or low reading for SC2 is unrealistic.

                These guides are not always accurate.

                you could try my other suggestion, I'm thinking it should either turn on or go 6 blink.

                Comment

                • Katzat
                  Member
                  • Mar 2016
                  • 23
                  • USA

                  #28
                  Re: TC-P50VT20 10 Blink Code

                  Originally posted by tw2005
                  SC2 can read 300k-over 2 megohms so it would be interesting to know the measured value.

                  A generic value of 1k or over being classified as not shorted or low reading for SC2 is unrealistic.

                  These guides are not always accurate.

                  you could try my other suggestion, I'm thinking it should either turn on or go 6 blink.
                  P15V = 2.5 kOhm
                  Vsus = 5.7 MOhm
                  Vda = 4.2 MOhm

                  I've since removed the SC, SU, and SD boards in preparation for sending the SC Board for repair. Could the other test still be performed with those out of the set completely to see if I get 6 blinks?
                  Last edited by Katzat; 05-03-2016, 09:14 PM.

                  Comment

                  • tw2005
                    Badcaps Legend
                    • Oct 2011
                    • 6457
                    • Australia

                    #29
                    Re: TC-P50VT20 10 Blink Code

                    Originally posted by Katzat
                    P15V = 2.5 kOhm
                    Vsus = 5.7 MOhm
                    Vda = 4.2 MOhm

                    I've since removed the SC, SU, and SD boards in preparation for sending the SC Board for repair. Could the other test still be performed with those out of the set completely to see if I get 6 blinks?
                    sure, I am somewhat curious to find out what it does.

                    interesting results. So 5.7Mohms across SC2 ?

                    Comment

                    • Katzat
                      Member
                      • Mar 2016
                      • 23
                      • USA

                      #30
                      Re: TC-P50VT20 10 Blink Code

                      Originally posted by tw2005
                      sure, I am somewhat curious to find out what it does.

                      interesting results. So 5.7Mohms across SC2 ?
                      Yes. It is decreasing. I guess there's a cap in the circuit that's biasing a transistor gate or something. I didn't wait to see how low it would go, but it's definitely not shorted.

                      I'll run that test tonight and report back.

                      Comment

                      • Katzat
                        Member
                        • Mar 2016
                        • 23
                        • USA

                        #31
                        Re: TC-P50VT20 10 Blink Code

                        Originally posted by tw2005
                        sure, I am somewhat curious to find out what it does.

                        interesting results. So 5.7Mohms across SC2 ?
                        OK, It took me a couple of evenings, but I ran the test with everything you specified disconnected.

                        Yes, the fans ran when it was turned on, but it never shut off and I got no SOS code. No 10 blinks and no 6 blinks. It was like it thought it was running just fine.

                        The SC board has been sent away for repair and I'm now waiting for it to come back for reassembly.

                        Comment

                        • tw2005
                          Badcaps Legend
                          • Oct 2011
                          • 6457
                          • Australia

                          #32
                          Re: TC-P50VT20 10 Blink Code

                          Originally posted by Katzat
                          OK, It took me a couple of evenings, but I ran the test with everything you specified disconnected.

                          Yes, the fans ran when it was turned on, but it never shut off and I got no SOS code. No 10 blinks and no 6 blinks. It was like it thought it was running just fine.

                          The SC board has been sent away for repair and I'm now waiting for it to come back for reassembly.
                          That's a good sign. Should be happy days

                          Comment

                          • matu
                            Member
                            • May 2016
                            • 10
                            • Estonia

                            #33
                            Re: TC-P50VT20 10 Blink Code

                            Hi, i have a similar problem discussed above but refer to model
                            TX-P42VT20. Well, continiously this TV gives me 10 blinks error code when switched on. I have changed the main A board for the beginning which didnt give a result. Then I changed the SC board, following with D-board, no big difference still 10 blinks error. All transistors and diods are checked on SC boards for short before installed by my tech.friend also SS boards seems to be working. If I switch tv on with orig. videoboard, on the board the optical red lid is on. I did the test described here(i dont know is it suitable for that model also):
                            SC2, SS11, P35, and the 3 white ribbons(only one wide white ribbon present) on the side of the A-board.Now turn it on, if it turns on and no error blinks the P and A are ok. Do this for less than 30secs." Still the same!

                            All boards ordered are matching labels and asked for 42" model.
                            One weird case if i swap between A-boards, then switching tv on with orig. A board the green lid blinking longer time then turn back to 10 blink error code. Ther is only one board i havent changed - the SS, regards to 10 blink error code. But before to make another investment, i need to be sure. So, would be very grateful for any help how to find the failed one.Thanks

                            Comment

                            • tw2005
                              Badcaps Legend
                              • Oct 2011
                              • 6457
                              • Australia

                              #34
                              Re: TC-P50VT20 10 Blink Code

                              Originally posted by matu
                              Hi, i have a similar problem discussed above but refer to model
                              TX-P42VT20. Well, continiously this TV gives me 10 blinks error code when switched on. I have changed the main A board for the beginning which didnt give a result. Then I changed the SC board, following with D-board, no big difference still 10 blinks error. All transistors and diods are checked on SC boards for short before installed by my tech.friend also SS boards seems to be working. If I switch tv on with orig. videoboard, on the board the optical red lid is on. I did the test described here(i dont know is it suitable for that model also):
                              SC2, SS11, P35, and the 3 white ribbons(only one wide white ribbon present) on the side of the A-board.Now turn it on, if it turns on and no error blinks the P and A are ok. Do this for less than 30secs." Still the same!

                              All boards ordered are matching labels and asked for 42" model.
                              One weird case if i swap between A-boards, then switching tv on with orig. A board the green lid blinking longer time then turn back to 10 blink error code. Ther is only one board i havent changed - the SS, regards to 10 blink error code. But before to make another investment, i need to be sure. So, would be very grateful for any help how to find the failed one.Thanks
                              This being a 3D model makes it a bit different especially the " 3 white Ribbon "bit but if you read above what was done The TV turned on with no error blinks? Did you read the previous posts?

                              Have the TV off, disconnect SS11, turn it on and post up what happens

                              Comment

                              • matu
                                Member
                                • May 2016
                                • 10
                                • Estonia

                                #35
                                Re: TC-P50VT20 10 Blink Code

                                no. there is always only 10 blinks, SS and SC disconnected both or only one at time. Two second green flashes, relay click and 10blink failure code.nothing on the screen.

                                Comment

                                • tw2005
                                  Badcaps Legend
                                  • Oct 2011
                                  • 6457
                                  • Australia

                                  #36
                                  Re: TC-P50VT20 10 Blink Code

                                  Originally posted by matu
                                  no. there is always only 10 blinks, SS and SC disconnected both or only one at time. Two second green flashes, relay click and 10blink failure code.nothing on the screen.
                                  Try the instructions in post 24 watch out for residual voltages after each power cycle .

                                  Especially p35 p65 that feed the c boards and panel

                                  Comment

                                  • matu
                                    Member
                                    • May 2016
                                    • 10
                                    • Estonia

                                    #37
                                    Re: TC-P50VT20 10 Blink Code

                                    Originally posted by tw2005
                                    Try the instructions in post 24 watch out for residual voltages after each power cycle .

                                    Especially p35 p65 that feed the c boards and panel


                                    Thats what i did:
                                    TV off.

                                    disconnect:

                                    SC board
                                    SC2, Sc20, - disconnected, same numbers on my SS board

                                    SS board:
                                    ss11, - disconnected from P-board P11, SS11 cant reach

                                    P-board:
                                    P35, P65, - on my board there is P35 and P6( which is connected to A-board),both disconnected. P25 goes to D-board, stay connected.

                                    D-board:
                                    D31,D32,D33,D34 - on D-board there are D31 and D32 (disconnected both).
                                    Others D20 disconnected from SC board, D5 connected with A-board.

                                    And result is - there is no difference in behaviour.

                                    Comment

                                    • tw2005
                                      Badcaps Legend
                                      • Oct 2011
                                      • 6457
                                      • Australia

                                      #38
                                      Re: TC-P50VT20 10 Blink Code

                                      Ok looks like i need to look at a manual. Obviously the 42 is different. No c boards along the top just the bottom by the sounds of it in which case some of those are missing. P6 needs to be connected.

                                      Got 10mins of tv to watch then i can get on my pc.

                                      Comment

                                      • matu
                                        Member
                                        • May 2016
                                        • 10
                                        • Estonia

                                        #39
                                        Re: TC-P50VT20 10 Blink Code

                                        yes, only two c boards on the bottom.I can provide photo from the back if needed. Thanks for your efforts

                                        Comment

                                        • Katzat
                                          Member
                                          • Mar 2016
                                          • 23
                                          • USA

                                          #40
                                          Re: TC-P50VT20 10 Blink Code

                                          TW, you are doing the Lord's work. Thanks so much.

                                          Comment

                                          Related Topics

                                          Collapse

                                          • Tynan Dill
                                            Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                                            by Tynan Dill
                                            I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                                            Upon bringing it home and plugging it up, it showed a standby light.

                                            I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                                            The screen seems to blackout and stay black, but with a flashlight I can see the display.

                                            With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                                            Assuming...
                                            11-22-2024, 01:46 PM
                                          • m1ch43lzm
                                            HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
                                            by m1ch43lzm
                                            Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
                                            Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
                                            05-12-2025, 08:37 PM
                                          • Hakuu
                                            LG OLED77G1PUA - No Video / Audio after a TCON Board change and Software Update
                                            by Hakuu
                                            Hi There,

                                            This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.

                                            After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.

                                            More Details

                                            TV Model - LG OLED77G1PUA

                                            Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt...
                                            07-12-2023, 02:37 PM
                                          • cheeky2
                                            Sony RB2G Chassis KDL-55W815B MAIN BOARD 2 Blink Error issue resolved! Happy days :)
                                            by cheeky2
                                            For anyone interested just repaired this Sony Main board TV that had a 2 blink error code, the chassis is a RB2G which is common to quite a few different Sony models. The Ceramic 10uF 25V X7R 1206 capacitor C9114 was shorted which took the smd 2A 0603 fuse out F9101. This was powering the Buck converter TPS54332 which caused no 5V output from it.
                                            See the attached picture of the locations of both components. I also attach the best service manual I found for this board for anyone else in a similar position of trying to repair this main board. It's not specific to the TV model however it gives...
                                            01-08-2024, 05:56 AM
                                          • jb_Bak
                                            Sony xbr-65x900c main board issues?
                                            by jb_Bak
                                            Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.

                                            Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
                                            Power Board Connector that goes to Main board
                                            CN6401
                                            Pin 01 NC
                                            Pin 02 NC
                                            Pin 03 "BL_ON": 0V
                                            Pin 04 "N/C"
                                            Pin 05 "STBY 3.3V": 3.5V
                                            Pin 06 "GND": N/C
                                            Pin 07 "AC_OFF"...
                                            09-27-2021, 04:52 PM
                                          • Loading...
                                          • No more items.
                                          Working...