2 - 1SECTION 2. INSIDE VIEWSLED CTRL(Q82,Q83)VCO• MAIN-A UNIT(TOP VIEW)CPU5 LINE REGULATOR(IC54)+5V LINE REGULATOR(Q76)PLL IC(IC2)MIC/AF LINE SW(IC56)APC AMP(IC1)TCXO(X2)TONE FILTER SW(Q52)TONE LPF(IC59)HPF(IC58)MIC GAIN CONTROLLER(IC62)2ND IF BPF(FI2)2ND IF BPF (For narrow mode only)(FI3)LPF(Q51)BEEP SW(IC61)+5V LINE REGULATOR(Q75)