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Generic Car Amp. schematic

Discussion in 'Hobby Electronics' started by Matt Flax, Nov 24, 2005.

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  1. Matt Flax

    Matt Flax Guest


    I would like to begin to repair a few car amps. I have around the place
    at mine ....

    They all seem to have massive power filters and two major types of
    active components ...

    Can anyone point to a good place to see a generic car audio schematic ?
    I have tried to find the schematics for these particular amplifiers, but
    alas no luck so far ...

  2. James Sweet

    James Sweet Guest

    There's been several construction projects in various magazines.
    Essentially they're very similar to a household amplifier, except rather
    than a 60 (or 50) Hz transformer stepping down the line voltage, car
    amps use a high frequency switchmode power supply to step up the 12V to
    the + and - voltages required by the amplifier. First determine whether
    the problem is in the power supply or the amplifier section, then
    Standard diagnostic procedures apply to either portion. Usually the
    problem is not too hard to track down, most all these amps are very
    similar at a basic level.
  3. Ken Taylor

    Ken Taylor Guest

    Many (most?) have a single brick PA module per channel, which in my
    no-longer-recent experience has been source of the problem much of the time.
    A quick check of the web for data on the brick concerned will reveal a
    recommended/sample circuit, which often as not is followed close enough to
    make fault finding easier.


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