IGEP0040HardwareRABugs
From IGEP - ISEE Wiki
BUG FULL_05: Optional input amplifier: gain is too low
INFO:: Gain from NFM2173 isn't enough for a MIC audio
WORKAROUND: Use PMIC MICs as a dedicated input for a JA1 connector: disable optional input amplifier, input audio switch and cirrus U81 ADC1 and ADC2:
- C704, C705 not mount
- R718, R716 not mount
- R737, R738 not mount
- R705, R708 mount
- R870, R871, R872, C889, C890 mount
- R800 mount
- R802 no mount
RESULT:
- JA1: PMIC MIC IN
- JA2-6: CIRRUS