Bose SoundDock 10 Service Manual page 68

SoundDock 10 Theory of Operation
ADC Signal conditioning
U201 takes signal & subtracts AUX_COM to reduce noise
U202 inverts U201's output & creates a differential signal to drive the ADC
U202's noise is common mode, & subtracted out by the ADC's own differential
input
I2S test points
ADC
Master Clock- TP650
Bit Clock- TP226
LR Clock- TP227
Data- TP231
DAC
Master Clock- TP650
Bit Clock- TP226
LR Clock- TP227
Data- TP645 (Woofer), TP646 (L), & TP637 (R)
10