[sdiy] Need help about how to service an amp

cheater cheater cheater00social at gmail.com
Sat Apr 3 21:50:13 CEST 2021


you shouldn't be running it without a load.

get a schematic and start there.

my guess is it's going to be the power transistors. check if any of
them are shorted.

On Sat, Apr 3, 2021 at 8:56 PM Jean Bender via Synth-diy
<synth-diy at synth-diy.org> wrote:
>
> Hi list !
>
> A friend gave me a Peavey KB100, not working, i mean it's powering up but no sound, even in the headphone output.
>
> Well, i realise in don't know from where to start when you have to service an amp. Is there a specific way to work once you have check all the basics (fuses, power supply, and visual check up around caps and chips) ?
>
> Do i need, for example to simulate the speaker impedance if i disconnect it from the board for troubleshooting the circuit ?
>
> So this thread is more to have tips, readings about this kind of thing, since i don't feel really comfortable working on it from scratch knowledge !
>
> Thanks per advance
> J.
> --
> Jean Bender
>
> Hak Lofi Record
>
>
>
>
>
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