It definitely shouldn't be shorted across all 3 terminals.
Is that what changed after you lifted D402?
Is that what changed after you lifted D402?
D402 is lifted. Still have audio on one side but not the other. If I don't power the amp up no 12v connected. Or remote or ground. I have sound on both side of r4011. .
Im not shore when they got shorted. But they have been getting hot for a well now.
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It's mainly the one on the top. Closest to the heatsink that's showing short and is getting hot when the amp is power up.
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Where does the middle pin go on the top mosfet ( closest to the heat sink) the pad left with the mosfet
The collector of the PZTA56 goes to the negative low-voltage power supply. It's the same supply that feeds the op-amps.
I'd leave them out for now. Until we get a good signal out of the last op-amp, they can't be used. All they do is drive the optocouplers.
Ok. I have sound on both side of R4011. But I remove the ne5534 that's close to the heat sink. Does this point to a issue with this op-amp?
I have audio on both side or r4011 with out the ne5534 by the heat sink in. I replace it with a new one. For some reason it's doesn't make it on the other side of r4011 when the ne5534 are in or when there is power and ground connected to the amp.
The large resistor that was getting hot that was melting off how many volts are supposed to be flowning to that resistor?
I think it has the positive rail voltage across it. It's not quite that simple but that's essentially the voltage across it.
If the outputs are in the circuit, you have to short terminals 5, 6, 7 together.
Why are you taking them out?
Why are you taking them out?