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Fault finding with SMPS

Discussion in 'General Electronics Discussion' started by Mondotronics, Jul 13, 2016.

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  1. Mondotronics

    Mondotronics

    1
    0
    Jul 13, 2016
    I've got a Yamaha P7000S Power Amplifier on my desk. It is not powering up. In general,can anyone please advice me on steps to find faults in SMPS?
    To be more specific on the problem here, Two power resistors were blown and also two igbt close to the main transformer were blown.
    Please help. Thank you
    Regards
     
  2. davenn

    davenn Moderator

    13,833
    1,950
    Sep 5, 2009
    not familiar with it

    firstly, have you tried to find a schematic for the circuit ? would be of great help
    and sharp well lit photos would also be of huge help


    Dave
     
    Last edited: Jul 13, 2016
  3. shlomo1234

    shlomo1234

    10
    0
    Jun 20, 2016
    As Dave said find the schematics, also replace those resistors and the transistors and check all the elctrolitic capacitors.
     
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