Musical frequencies as in music sounds very staticky ,garbled but I can tone generate up and down thru the frequencies and it sounds very clear and I don’t have the connex switches. I think I’m missing some components .c-13, c-14, R-32, R-33?
Thank you
Thank you
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I benching with a old alpine deck and a android cell phone. The rca output shields of the deck are grounded to the case.
Is the head unit powered from the same power supply as the amp?
What does the waveform out of the Alpine look like if you play a sine wave?
What does the waveform out of the Alpine look like if you play a sine wave?
I have 2 separate power supplies. The alpine is connected to a converted pc power supply and the amp is on a Astro -R12. I can’t play a sine wave out of the deck. No disk, Bluetooth or aux. I’ve tested a jbl and a planet audio amp to rule out the source as the problem. I can play sine waves and music from my cellphone
The RCAs look to be a little rusty. It’s only on the RCAs it looks like this
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In rev. 3 photos I have, those components are not installed.
What's the resistance between the RCA shields on the head unit and the ground terminal of the amplifier?
JLs sometimes have signal problems where other amps do not.
What's the resistance between the RCA shields on the head unit and the ground terminal of the amplifier?
JLs sometimes have signal problems where other amps do not.
The input sensitivity switch is acting up. It will play with high input selection sometimes. And the louder I play it the sounds better. Just rest staticky. It’s like a radio station that’s far away. Comes in and out but never clean. Or like trying to listen to 99.9 on 99.8 for example
The low level takes the switch out of the circuit. The high-level position connects a resistor that pulls the signal down. Are you sure it works better in high-level mode? You likely have another switch or connection that's dirty.
Try lifting the preamp board at the connectors just a bit then reseat them. Do this a few times and see if it makes a different.
The solder connections of the single row header sometimes fail.
Try lifting the preamp board at the connectors just a bit then reseat them. Do this a few times and see if it makes a different.
The solder connections of the single row header sometimes fail.
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No it doesn’t work better, it just worked about as good as the low level input once or twice. I’ll try your suggestions . I reflow if the single row looks questionable
That's the current sensing resistor (DAELIM impression) for the low-voltage power supply. If it's actually 3 ohms instead of 0.1 ohms, it could be causing the low-voltage supply to shut down prematurely.