- 27 -IC BLOCK DIAGRAM & DESCRIPTIONCONTROLCIRCUITLOGICCIRCUITCCBINTERFACECONTROLCIRCUIT1514161718192021 22 24 25 262310 9 7 6 5811L4L3L2L1NCNCR1R2R3R4RSELO RIN RTRE RBASS1 RBASS2 ROUTLSELO LIN LTRE LBASS1 LBASS2 LOUTTESTV SSCEDICLVDDVrefNC1213123029282743LVrefRVrefIC480 LC75342M(Function Switch / Electric Volume / 2 BandP12P10ANALOGSURROUND ON/OFFLEVELBASSAABBSWSWP1 P2 P3 P4 P5 P6 P7 P8IN-L IN-RLB-ADJ LEBEL-ADJ GNDSW VREFREFFS-L FS-RP11VCC OUT-R OUT-LP9Vcc++ ++IC481 LA2610(Analog Surround IC)