-20-R Signal (Input to ICV10)Location: LCV10, RCV30G Signal (Input to ICV10)Location: LCV9, RCV28B Signal (Input to ICV10)Location: LCV8, RCV264-2-8. Audio signal processing, KEY, and LEDIC201 switches Audio signals and passes a switched signal to IC601 for audio signalprocessing. IC601 controls sound parameters such as Volume, Balance, and Equalize.