I have a 1200.1 that has some dc on the outputs cause intermittent distortion on the output
Phoenix Gold Titanium 1200.1
- Thread starter RockfordFIx
- Start date
How much DC measured directly across the speaker terminals?
Scope image of the distorted signal?
Scope image of the distorted signal?
I was playing audio with 12” subwoofer, I replaced the gain pot (50k), it was bad, it ranged from 0.5 up to 3 vdc, sounded like my sub woofer coil was scratching. I think there maybe an intermittent race or solder joint issue. I reached out to onemoreamp for schematic
Is the audio clean on the output of the op-amp that drives the input of the power amplifier's differential amplifier?
Are the rail and regulated voltages as expected?
Are the rail and regulated voltages as expected?
Did that clean up the audio?
I installed the new 10 ohm resistor and it immediately smoked.
Lift pin 8 of U5 and try again.
I replaced the resistor and the lm833 and it did the same thing, looks like one side of that resistor is tied to pin 11 which is V+
Njr13600d
Is C572 shorted?
I've never seen a 13600 fail shorted (failure, of any kind is rare) but anything is possible.
I've never seen a 13600 fail shorted (failure, of any kind is rare) but anything is possible.
I measured 81ohms across c572 and I am also reading -1.2vdc on pin 8 which I was expecting 12-15vdc
I removed that cap and the lm833 (u5) vcc voltages is back
Clean audio?
