Troubleshooting - Flow Chart Question

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  • Xwell
    Member
    • Nov 2011
    • 16
    #1

    Troubleshooting - Flow Chart Question

    Good Evening,

    I'm attempting to repair an LG Blu-Ray player that will not power on. I have found a service manual that provides a flow diagram to test each of the various voltages as they are passed from the power board to the main board. My noobie question is, "What dies it mean when it asks if a pin is H?" I've attached the particular diagrams, with the second sheet being the one I need help with. I have good voltage on the 5.3V pins.

    Thanks for any help you can give,

    Xwell
    Attached Files
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    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Troubleshooting - Flow Chart Question

      Originally posted by Xwell
      My noobie question is, "What dies it mean when it asks if a pin is H?"
      I don't have years of experience like some of the other members, but sometimes I read that voltages are pulled high or low. Maybe "H" stands for high?

      For example, pulling a voltage high might be raising the voltage from 0.0 to 5.0V. Similarly, pulling a voltage low might be lowering the voltage from 5.0V to 0.0V.
      Last edited by retiredcaps; 03-07-2012, 11:44 PM. Reason: typo
      --- begin sig file ---

      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

      Please do not post inline and offsite as they slow down the loading of pages.

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        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Troubleshooting - Flow Chart Question

          retirecaps is correct, 'H' = LOGIC HIGH, 'L' = LOGIC LOW, it may confuse some people if they use '0' and '1'.
          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

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271
              #4
              Re: Troubleshooting - Flow Chart Question

              Originally posted by budm
              retirecaps is correct,
              --- begin sig file ---

              If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

              We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

              Please do not post inline and offsite as they slow down the loading of pages.

              --- end sig file ---

                Comment

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