I recently bought the audio circuit of an unknown device. supply DC 15v power according to the symbo

vietnam
vietnam Posts: 2
in Basic Hookup/Wiring Questions
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  • vietnam
    vietnam Posts: 2
    I recently bought the audio circuit of an unknown device. supply DC 15v power according to the symbol on the circuit but it won't start. i think it needs 1 more joystick but i don't know how to find it. can anyone help me find the start key with ( amplification sta369bw . bluetooth csr 8645. ic dac sunplus sph e8107s) thanks 😍
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