can I test a main board out of a TV?

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  • skyver
    Member
    • Feb 2015
    • 31
    • Australia

    #1

    can I test a main board out of a TV?

    Eg can I power it with a power adapter on my bench and test the voltage regulators and even use the serial port to access it
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: can I test a main board out of a TV?

    I have done this before with a board. It used 5V and 12V, but the CPU would work fine if only 5V was present. Using my scope I could see the "NO SIGNAL" data on the LVDS outputs which would change when I pressed buttons on the remote (the pattern of bits would change indicating a different image was being displayed.)
    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

    • skyver
      Member
      • Feb 2015
      • 31
      • Australia

      #3
      Re: can I test a main board out of a TV?

      Originally posted by tom66
      I have done this before with a board. It used 5V and 12V, but the CPU would work fine if only 5V was present. Using my scope I could see the "NO SIGNAL" data on the LVDS outputs which would change when I pressed buttons on the remote (the pattern of bits would change indicating a different image was being displayed.)

      Awesome thanks for the info mate

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 30928
        • Albion

        #4
        Re: can I test a main board out of a TV?

        you can get video from any scart conectors too sometimes, as it's for feeding vcr's and cable decoders.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: can I test a main board out of a TV?

          Originally posted by stj
          you can get video from any scart conectors too sometimes, as it's for feeding vcr's and cable decoders.
          Depends on the model. A lot of TVs simply route the SCART outputs between ports - but this is just a set of analog switches so doesn't really tell you much about whether the scaler/video decoder are working. There is one exception I am aware of and that is some LG TVs have a "DTV Out" which is a direct capture of the Freeview and analogue TV stream.
          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

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