Need Help to identify a component.

Discussion in 'General Electronics Chat' started by Ma5cH, Aug 26, 2007.

  1. Ma5cH

    Thread Starter New Member

    Aug 26, 2007
    1
    0
    Hi. I have a broken car amp, a Hifonics Brutus BX1205D. It´s a 1200W RMS @ 1ohm amp. It had broken (completely burn) switch-trasistors so I replaced them all, and now the amp does power up but directly goes in to Protection mode and makes a really high pitch noise from the switch. So I only run it a few seconds every time. But now I have located the problem. I found 2 broken transistors on the PulseWidthModulator card in the amp (See link for Picture) . I measured it with a oscilloscope, and what suppose to be a square-wave, looks like a 3-year old has been drawing. But the problem now is that I can't find the damn part anywhere. and all that is written on the part is BE RM. and I getting like a million hits on google but I have found none that is related to this yet.
    So Please, I would really appreciate the help. If you know who the manufacturer is or if you could point me in the right direction.

    Link to the Pic of the transistor:
    http://uploadimages.com/manage/MjMxNDQuMjUxMjQ=.212497

    And sry for the poor English, I'm Swedish.
    Thanks alot in advance.
    sincerely.
    Ma5cH
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    I think what you have is a BCX55.

    Check the datasheet. I think the RM is either the datecode or the manufacturer's location code.

    hgmjr
     
  3. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
    4
    Please refer to this post.

    According to the above site, BE marking on SOT89 (which is what you have there) is BCX55, like what hgmjr said above.
     
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