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Sharp 13SB50 tv

Discussion in 'Electronic Repair' started by Wayne Tiffany, May 9, 2005.

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  1. I agreed to look at this set for a friend and my online search for similar
    symptoms hasn't turned up anything. I haven't opened it yet - thought I
    would see if the solution were widely known.

    The problem appears that the set will not respond to the remote control.
    She had two remotes that used to control it, and neither one seems to have
    any effect. This tv model is only controllable with the remote (totally
    stupid idea) so I don't know if the set will operate any other way. I can
    turn it on with the set power button, but can't change the channel or
    anything with the remote.

    I'm not sure how to really check the remote itself as I don't have another
    identical tv to try it on. Viewing the remote with a video camera shows
    that the led is putting out, so at least that's a good sign. The main one
    is a universal and I tried resetting the proper code and also scanning -
    both to no avail.

    Anyone already go through this?

  2. I'm not sure how to really check the remote >itself

    Point the remote control at a video camera. If it's working you will
    see it glow.

    IR is only just off the visual range and most (all?) cameras reach
  3. Thanks for the thought - I had pointed out that I did that and there is
    output, but that's the extent of my ability to test the remote for that
    particular model. Any thoughts past that?

  4. b

    b Guest


    could be:
    1. defective infra red sensor
    2. defective or noisy supply to ir sensor
    3. 5v transistor in micro circuitry

    there is , i seem to recall, a section in the TV faq
    ( about checking the ir sensor. they usually have 3
    pins, scoping the output one will give you an idea of whether the
    pulses are non existent or scrambled

  5. A remote can sometimes put out a signal and still be faulty, by being
    off frequency. It's rare, though.

  6. JR North

    JR North Guest

    Try cleaning the TV IR port.
  7. Do you mean as in just wipe off the cover? Could it really be that simple?

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