24 volt dc radio repair

Discussion in 'General Electronics Chat' started by drondia, May 15, 2009.

  1. drondia

    Thread Starter New Member

    May 5, 2009
    I'm trying to repair a 24 volt dc radio I took some pictures. I'm not a repair man, my repair man told me to send it back to the factory but its Hangsheng electronics co. ltd in China. I'd rather not send it back there.
    I checked the capacitors and they seemed fine, neither did I find anything wrong with any resistors but I found the solder melted away from one of the legs of the "transformer?", could someone please tell a green horn if this is bad or if something else caused it to heat up and melt the solder.
    Thank you very much.
  2. David Bridgen

    Senior Member

    Feb 10, 2005
    The coil wound on the toroidal core is just a choke to prevent ignition and other noise getting into the radio through the supply line.
    It almost certainly has a capacitor associated with it, on the radio side of it, not the supply side, and it may be that which has developed a short.

    But I see a fuse on the board. I would have thought that it would be the first thing in the supply line - before the filter, so maybe the above is wrong.