Re: Generic Car Amp. schematic

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#475

From: James Sweet
Date: Fri, 25 Nov 2005 01:18

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Matt Flax wrote:
> Hello,
> 
> 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 ...
> 
> thanks
> Matt

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.

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