The microphone signals come down the ribbon cable to CN5. They are amplified by the two JRC2100 ICs, which are op-amps. Then the signal goes to IC34. I am fairly sure that there is a big processor on the underside of the board in the area with lots of holes between R20 and C48. That processor will read the signal digitally from IC34.
I can't find the ADC. I'm a total noob to electronics and just a little lost. Could you help locate the actual part number on the boards? Sorry, I know I'm asking a lot
I can't what IC38 is from the numbers on it. I agree that it looks like an audio IC, but I think that it is the power amplifier that drives the headphone socket via the two electrolytic capacitors.
The OP wanted to find the ADC, not the output amplifier.
Its an old 8570 audio codec ic… Cant get that footprint anymore .. The main processor is next to the usb connector is a USB ic. I cant see a "main" processor.
Its an old 8570 audio codec ic… Cant get that footprint anymore .. The main processor is next to the usb connector is a USB ic. I cant see a "main" processor.
It actually contains an ADCs, as well as a DACs, so I'm not sure why the design needs the AKM5357 ADC as well. However, there are lots of possible reasons why separate ICs could be needed.
It actually contains an ADCs, as well as a DACs, so I'm not sure why the design needs the AKM5357 ADC as well. However, there are lots of possible reasons why separate ICs could be needed.