Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • rtcwhunter
    New Member
    • Feb 2021
    • 5
    • US

    #1

    Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

    Good afternoon all,

    I have a Sharp Aquios LC-52E77UN that will not stay powered on. Sometimes it works for 3-5 minutes other times it will make it an hour but it always makes a popping sound before turning off. It then flashes the power light twice as well as the OPC light twice. I have attached the service manual and according to page 6-17, my error is "DET_D3V3 (52pin) error (L). D3.3V is not applied."

    I have read another post on BADCAPS that had a similar issue but with no resolution:

    https://www.badcaps.net/forum/showthread.php?t=84559

    I followed the steps in that discussion and have the following readings:

    Off
    Pin 1,2 - 0V
    Pin 5,6 - Ground
    Pin 9 - 3V
    Pin 10 - 0V
    Pin 11 - 5V
    Pin 12 - 0V

    On
    Pin 1,2 - 13.1V
    Pin 5,6 - Ground
    Pin 9 - 2.99V
    Pin 10 - 2.85V
    Pin 11 - 5.01V
    Pin 12 - 3.18V

    Hoping someone can jump in and tell me where to go next.
    Thanks for any help provided in advance!
    Attached Files
    Last edited by rtcwhunter; 02-08-2021, 03:47 PM. Reason: title not descriptive
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

    You should put down the pin names for all those pins so we can easily see what each pins is for.
    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

    • rtcwhunter
      New Member
      • Feb 2021
      • 5
      • US

      #3
      Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

      Thanks Budm. Pins are labeled as follows:

      Off
      Pin 1,2= 13.5V (SIGNAL) - 0V
      Pin 5,6= SGND(AUDIO) - Ground
      Pin 9= AC_DET - 3V
      Pin 10= PS_ON - 0V
      Pin 11= BU5V - 5V
      Pin 12= PNL_POW - 0V

      On
      Pin 1,2= 13.5V (SIGNAL) - 13.1V
      Pin 5,6= SGND(AUDIO) - Ground
      Pin 9= AC_DET - 2.99V
      Pin 10= PS_ON - 2.85V
      Pin 11= BU5V - 5.01V
      Pin 12= PNL_POW - 3.18V

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales

        #4
        Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

        Can you post focused photos of your circuit boards.
        Willing to help but I'm no expert.

        Comment

        • rtcwhunter
          New Member
          • Feb 2021
          • 5
          • US

          #5
          Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

          Dick_barton

          How's this look?
          Attached Files

          Comment

          • dick_barton
            Badcaps Legend
            • Aug 2015
            • 6642
            • Wales

            #6
            Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

            Has Pin2 of P2003 on the mainboard have the 3.3V present?

            Cannot read the legend around the various connectors since they are out of focus.
            Attached Files
            Last edited by dick_barton; 02-10-2021, 08:43 AM.
            Willing to help but I'm no expert.

            Comment

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6642
              • Wales

              #7
              Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

              Also what is the voltage on Pin 5 (Vout) of IC9703
              Attached Files
              Last edited by dick_barton; 02-10-2021, 09:07 AM.
              Willing to help but I'm no expert.

              Comment

              • rtcwhunter
                New Member
                • Feb 2021
                • 5
                • US

                #8
                Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

                Good evening and thanks for the reply.
                Sorry about the pictures, took them as still and focused as I could get them.

                PIN2 of P2003 is labeled OPT+3.3V and reads 3.3V with power on.
                PIN5 of IC9703 shows 3.3V with power on.

                So I have a logic theory question. While the TV is in a working state, all voltages read as they should from every spot I've checked (I've been all over to the level I understand). When the tv turns itself off and gives me the flashing error lights, all reading are the same is if i turned the tv off manually. With an intermittent problem, how can i troubleshoot down to a bad circuit component? I'm an aircraft electrical technician and have a lot of time troubleshooting wiring and box level failures, but getting down to circuit board components is a whole new thing for me.

                Thanks for all your recommendations so far,

                Jeff Holder
                Last edited by rtcwhunter; 02-10-2021, 06:47 PM.

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales

                  #9
                  Re: Sharp LC-52E77UN DET_D3V3 (52pin) error (L). D3.3V is not applied.

                  Does this set have a backlight setting that can be set to minimum to see if the time between shutdown increases.

                  What you can do is use a hairdrier to warm up part of the circuit to see if you can speed up the time it takes to shutdown.
                  If you're lucky enough that heating up a specific area of the board does speed up time to shutdown then you could use a narrow tube to minimise the area being heated until you can identify the component that may be causing the problem
                  Last edited by dick_barton; 02-11-2021, 07:16 AM.
                  Willing to help but I'm no expert.

                  Comment

                  Related Topics

                  Collapse

                  • lmcancu
                    Voltage still applied to LED backlight stips when TV in standby?
                    by lmcancu
                    Is it normal that a voltage of 54 volts is still applied to the LED strips when the TV is in standby? There is not much current, but I can see several of the LEDs are on but very very dim. When the TV is turned on, the voltage jumps up to about 100v (there are 33x3v LEDs, I removed 3 bad ones)
                    03-23-2023, 09:52 AM
                  • sam_sam_sam
                    Tankless hot water heater controller board not powering up when power is applied
                    by sam_sam_sam
                    I recently bought a used tankless hot water heater and the controller board is completely dead no power up when power is applied the display board works however the main controller board does not work correctly at all the fuse is good

                    I bought a used replacement controller board that also had issues that I was able to fix and now the tankless water heater works correctly now

                    However I would like to know if I could figure what happened to this controller board if possible

                    Tomorrow I will take some better pictures of both side of both boards

                    The...
                    12-09-2022, 09:14 PM
                  • electroBriedis
                    230 VAC applied to 24VAC stepper motor with control board
                    by electroBriedis
                    Hello,

                    I have accidentally applied 230VAC to a 24VAC valve (an external fuse was blown). The valve has a control board and it can be controlld via 4...20mA and gives feedback as well. There are 2 PCB connected with wires as you can see in the images added.
                    I opened it up and I can only find one burnt element on it, which for me seems to be a transient voltage suppressor. It now measures short, but the traces around it are connected. The writing on the element is "AUTO K30 1741" - I could not find a part like this online.
                    When now applying 24VAC to the valve...
                    01-28-2021, 08:43 AM
                  • KYBOSH
                    Trying to Revive - Eufy Security Wired Wall Light Cam S100 - No Power
                    by KYBOSH


                    This found its way to my workbench this week.

                    Wired Wall Light Cam S100

                    The buyer thought he got a great deal but it turns out it was likely dead and the seller tried to get anything they could for it by passing it off on an unsuspecting buyer.
                    Rather than tossing it in the bin he gave it to me to play with as he knows how much I love to try to solve problems like these.


                    The camera portion of this device worked fine when powered via USB but when on the mains it would not work at all.
                    This reminded me of the eufy floodlight...
                    09-06-2024, 09:09 PM
                  • EasyG0ing1
                    Anyone have experience with an RC driven temporary "ON" transistor switch?
                    by EasyG0ing1
                    Hello,

                    The idea is to use a transistor to activate a latching relay once a voltage is applied but to prevent a constant voltage from being applied to the relay coil, I thought it might be a good idea if it were possible to make sure that the voltage applied to the coil is temporary even though the source voltage could be "ON" for long periods of time.

                    This is the circuit that I came up with. I have not tested it yet because I don't have the relay yet, though I am looking for anyone who might have experience with this kind of a setup to hopefully offer some advice,...
                    07-03-2024, 10:25 AM
                  • Loading...
                  • No more items.
                  Working...