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12 volt Transfomer

Discussion in 'Electronic Repair' started by postielady, Mar 1, 2007.

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  1. postielady

    postielady Guest

    Can anyone give me some advice on my caravan transformer, the
    transformer buzzes but no power comes out.
    Thank you for any help at all
  2. Could be a bad connection or an open secondary (unusual). If it buzzes, the
    primary is energized.
  3. Tim

    Tim Guest

    Are you talking about the actual transformer, or a power supply? People
    often call a power supply (AC in DC out) a transformer, but techs are
    talking the actual AC to AC part inside that drops the voltage down to
    12 or so.

    Just getting the full info....

    - Tim -
  4. Neilish

    Neilish Guest

    I think the O.P. might be talking about an invertor (dc in ac out).
  5. Clint Sharp

    Clint Sharp Guest

    I would think he's talking about the charger for the battery but you
    could be right of course.
  6. Guest

    yes, if you tell us the necessary info.

  7. oldeng

    oldeng Guest

    It could be any of the following:-

    1, The 240 volt primary winding could be U/S
    2, The 12 output winding is burnt out
    3, The 12 volt fuse has blown

    Try to get the manual for the van, it should contain a circuit diagram
    if you can get a manual it is pretty easy to follow.


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