[sdiy] Need help about how to service an amp

Mark G mratx at aol.com
Sun Apr 4 00:55:06 CEST 2021

On amps, once you've checked the power supply, one of the best methods is to follow the signal path using the schematic with a signal tester of some kind  (I just use the a wooden chopstick with a capacitor hooked up to headphones.) Start at the input, when your signal stops that's the stage with the problem, and you can focus on troubleshooting that section.

Good luck!

On Saturday, April 3, 2021 Jean Bender via Synth-diy <lofideadbeat at gmail.com> 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 advanceJ.
Jean Bender

Hak Lofi Record

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