The main amp powersupply is working and if i bypass dsp board amplifier is working.
input signal is not passing dsp board and i have done measurements on the dsp board.
+/- 20v works and 5volt pwm step down works but 1.2v and 3.3v missing.
1.2v and 3.3v feeds the dsp part so if i try to communicate from pc the only thing working is the usb to serial chip (prolific).
My ideas are a defective dual pwm regulator or shortcircuit after regulator maybe capacitor shorted.
Any ideas of how to test regulator?
My idea was to lift the legs from the inductors but im not sure.
input signal is not passing dsp board and i have done measurements on the dsp board.
+/- 20v works and 5volt pwm step down works but 1.2v and 3.3v missing.
1.2v and 3.3v feeds the dsp part so if i try to communicate from pc the only thing working is the usb to serial chip (prolific).
My ideas are a defective dual pwm regulator or shortcircuit after regulator maybe capacitor shorted.
Any ideas of how to test regulator?
My idea was to lift the legs from the inductors but im not sure.
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