I have a DLS A7 amp on my hands. having trouble with it having whine when the engine is on.
I have tried everything and narrowed it down to the amp as the whine is present even when there is no RCA cables connected to the inputs.
besides the whine, it runs perfectly fine.
I was wondering, does anyone have experience with these or have a schematic?
the amp I have has about 3-4VDC from RCA shield to chassis ground. and sinks about 10mA if that voltage is shorted.
the leakage voltage drops to zero when the amp is turned on. when the amp is turned on, measuring with a ohmmeter, I measure ~1.3kohm from RCA shield to chassis GND no matter what polarity the DVM is attached.
there seems to be a circuit that is powered up/connects to the signal ground but I'm unsure what the purpose is for.
I have tried everything and narrowed it down to the amp as the whine is present even when there is no RCA cables connected to the inputs.
besides the whine, it runs perfectly fine.
I was wondering, does anyone have experience with these or have a schematic?
the amp I have has about 3-4VDC from RCA shield to chassis ground. and sinks about 10mA if that voltage is shorted.
the leakage voltage drops to zero when the amp is turned on. when the amp is turned on, measuring with a ohmmeter, I measure ~1.3kohm from RCA shield to chassis GND no matter what polarity the DVM is attached.
there seems to be a circuit that is powered up/connects to the signal ground but I'm unsure what the purpose is for.