This is supposed to be an amplification stage for a piezo microphone connected on J1.
The "ANLG_PWR" is at 3.0 volts. When probing the output (TP1) the DC output is at 3V.
I figured I had too much amplification and so reduced R6 from its original 1Mohm value to 200Kohm. That did improve the situation and got the output voltage down to 1.84V. When probing both inputs of U2 i get 1.48V.
Why is the DC output voltage not centered around 1.5V like I designed it to be?
I do need the original amplification (about 1:500) but need the DC output to be 1.5V.