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Attempting to repair a wifi amp with a suspected power supply issue

Discussion in 'Troubleshooting and Repair' started by kneegrow, Jan 12, 2013.

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  1. kneegrow

    kneegrow

    12
    0
    Apr 16, 2011
    ]The thing just stopped working after months of faithful operation. lost connection and noticed the power LED was off. I unplugged it immediately and disassembled it. upon plugging the board back in the power inductor and a nearby Cap almost immediately got HOT I suspected the inductor was bad and replaced it with a free sample from the component manufacturer. same issue. any ideas? some of the components I can't identify as I cannot find datasheets for them.

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    Last edited by a moderator: Jan 12, 2013
  2. davenn

    davenn Moderator

    13,560
    1,856
    Sep 5, 2009
    well the inductor wouldnt be getting hot without a reason
    chances are something further down the line is drawing excess current and that extra current through the inductor coil is causing it to heat up

    your pics are a bit blurry to be able to do any serious identification of parts or circuit tracks and without a circuit diag will be difficult to diagnose

    BUT for a start...
    1) SHARP well lit pics of the lower left area of the board, showing the area of the capacitor and inductor and some of the com[ponments to the right of the inductor
    2) show us where the power supply is connected and is this supply ( presumably from a plugpack?) DC or AC

    Dave
     
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