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AC to 9V DC adapter

Discussion in 'Electronic Repair' started by John Russ, Jul 21, 2003.

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  1. John Russ

    John Russ Guest

    I'm ahving problems installing an infra red TV relay. The
    manufacturer thinks its the power supply. Does any one know how to
    test a Class 2 transformer? It is the usual wall plug transformer
    with a mini plug that plugs into the device.
    I'd appreciate some advice.
  2. The first thing is to look at the back of it and see it the output is AC or
    DC. Then measure the output voltage with the appropriate scale. If the
    desired output is DC, there is always the chance that you're not getting a
    clean output - check it with a scope to see.

  3. Sofie

    Sofie Guest

    John Russ:
    Use a simple and inexpensive test meter to test it .... or find another
    device that takes the same plug and power voltage and polarity of the infra
    red TV relay. ..... or since the manufacturer thinks the problem is the
    power supply have them send you a replacement.
    A local Television/VCR repair shop should be able to assist you quickly and
    inexpensively regarding the testing of the power supply.
  4. Sofie

    Sofie Guest

    Wayne Tiffany:
    Certainly correct suggestions that you gave, but I would think that if the
    OP had a scope and knew how to use it that he would not be asking how to
    check the wall wart power supply to see if it works.
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