Question about Alpine MRV-F345 Car Audio Amplifier
This is a good start but, I would make sure that the power supply you are using is able to supply the current needed to power this unit. Once that is done I would use a dummy load to emulate the speaker connections and the use an oscilloscope to monitor the audio output signal. If you still have no output it would be safe to assume that the internal circuitry of the amplifier is at fault. I would suggest that you get a schematic and trace the audio signal through the unit using the signal path guide on the schematic. This will let you know where the signal is dropping off at and if the drop off is being caused by protection circuitry or if on of your amplification stages are at fault.
Posted on Sep 03, 2007
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