I’m not getting any continuity on those resistor, if they are what it is, then they are open.
This amp played couple of weeks Customer says it stopped, they tried powering on again but it’s just getting hot, my observation is that the low ohm resistor RA10 & RA11 is open again, I’ve just used a “jumper” wire to closed across the resistors and it powers on with output relay enable and seems ok, my bench PS is at 12v (6amp is max current) when amp powers on at idle I’m seeing a 3.60amp draw.
When add input audio and speaker there’s a whining pitch coming from the speaker output. What could be wrong?
When add input audio and speaker there’s a whining pitch coming from the speaker output. What could be wrong?
I’m curious to know what points are used to test for that, if that’s not a noob question. How do I test for carrier frequency?
Also the good news, the jumper wire I used to replace (temporarily) is about 2.5 feet long, and I did have it entwined in a circular loop laying across the circuit, trying to simulate 2.2ohms parallel resistor that was burnt, I think that was causing the interference, I’ve changed the burnt resistors and it’s playing ok now.
Also the good news, the jumper wire I used to replace (temporarily) is about 2.5 feet long, and I did have it entwined in a circular loop laying across the circuit, trying to simulate 2.2ohms parallel resistor that was burnt, I think that was causing the interference, I’ve changed the burnt resistors and it’s playing ok now.
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