30 C128 C2+ 31 C2- SP319 VSS 0.1µF + +5V 3 TS000 9 ENV35 75 ENT Vcc 400kΩ 100Ω RCA1 70 RCOUT 1 RCB1 71 RCA2 37 RCOUT2 20 RCB2 38 R1IN 66 R1OUT 80 R2IN 68 R2OUT 78 R3IN 35 5kΩ 5kΩ 100Ω 14 DRIN1 .