Icom ID-51A Service Manual - Page 51

VCOMOD REFMOD ASQLOUT ADET AUNLK ARSSI ANOISE BRSSI BNOISE BDETO BSQLOUT 3VS X1 15.3MHz VCOMOD VVCO3(VAV3) VCO_A 3VS,+5V IC6 AUNLK PLL IC DATA FIN CK APPS APLLSTB AVCO_SHIFT LOOP FIL VCO SHIFT Q308 D308 VHF VCO Q311,D304,D305,D306 UVCO3(UAV3) BUFF Q200 LV VCO DET SHIFT Q26 Q1 ALV D1 LPF UHF VCO Q27,D10,D11,D12 AMP Q202 AR3 LO AMP Q201 A_LOOUT T5 LO SW D14 BUFF Q48 ATT T5 Q39 ATT YGR AMP D20,D21 Q51 APC CTRL IC14B PSET MUTE SW Q43 REF X3 Q38 45.9MHz BPF FM-N/DV CERAMIC BPF FI1 FM CERAMIC BPF FI2 AAGC AGC DET WN W/N SW Q50,D34,Q49 AR3 Q36,D15 D16,D18,D19 TXMUTE LIMIT D22 A BAND AR3 IF AMP Q44 LIMIT D23 1st IFʢAʣ 46.35MHz XTAL BPF FI3 A_LO D801,D820 RF SW VAR3 UAR3 RF SW D802,D821 VCC-I Q41 DRIVE AMP IC12 GATE CTRL ISET1 VAR3 Q820 ARSSI ANOISE BR3 REF X4 Q900 61.2MHz BR3 BPF BAM2 AM SEL Q902 FM DET IC13 AGC DET Q903 BAGC WN W/N SW Q40 DISCRI X2 AM DET Q904 BAM2 MODE BR3 SW IC18 BRSSI BNOISE FM CERAMIC BPF FI900 FM DET IC901 3VS,+5V IC450 PLL IC BVCO_SHIFT LOOP FIL VCO SHIFT Q308 D308 DATA CK BPPS BPLLSTB FIN LV DET Q451 BLV VCO SHIFT Q1 D1 DISCRI X900 VVCO3(VBV3) VCO_B VHF VCO Q311,D304,D305,D306 UVCO3(UBV3) BUFF Q200 UHF VCO Q27,D10,D11,D12 LPF AMP Q202 LO AMP Q201 B BAND BR3 IF AMP Q901 LIMIT D880 1st IFʢBʣ 61.65MHz XTAL BPF FI880 B_LO D811,D830 RF SW VBR3 UBR3 RF SW D812,D831 Q801 UAR3 VBR3 Q830 80MR3 UHFC VHFC VAUBC VBUAC 3VS 80MR3 REG Q854 80MC VR3,UR3 VR3 REG Q850 VAR3 VA,VBR3 REG VBR3 Q852 VAUBC VBUAC 3VS R3 R3 REG Q853 R3C UAR3 UR3 UA,UBR3 REG UBR3 Q851 Q471 VAV3 VA,VBV3 VBV3 REG Q472 VVCO3 V,UVCO3 REG Q12 RIPPLE FIL VAUBC VBUAC UHFC VHFC UAV3 UA,UBV3 UBV3 REG UVCO3 Q470 VAUBC VBUAC 5VS VCC IC3 4V REG 3VS Q811 UBR3 LIMIT D905 LIMIT D904 T5 Q37,D17 YGR REG T3C_INV TEMP DET Q45 PWR AMP IC14A GATE CTRL ISET2 D501 D508 D510 HPF ANT SW T5 ANT SW CTRL Q501 Q502 Q503 VHFC UHFC LPF ANT SW D503,D504 D506,D903 D502,Q504,D511 ANT SW ANTENNA TX:400.000M~479.000MHz RX:380.000M~479.000MHz LPF LPF HPF D505,D509 PWR DET PWR DET D512,D513 LPF LPF TX:136.000M~174.000MHz RX:108.000M~174.000MHz ABPF2 A:137M-174MHz BPF D702,D703 BBPF2 VAR3 RF AMP Q701 VBR3 AAGC ABPF1 AGC Q49,Q50,D34 D704 BAGC BPF D705 BBPF1 VR3 108M-174MHz RF AMP Q702 ATT B:108M-174MHz BPF D741,D742 ABPF2 A:380M~479MHz BPF D602,D603 BBPF2 RF AMP Q740 UAR3 RF AMP Q601 UBR3 AGC Q903,D743 AAGC BPF D744 ATT D745 ABPF1 AGC Q49,Q50,D34 D604 BAGC BPF D605,D606 BBPF1 UR3 380M-479MHz RF AMP Q602 B:380M~479MHz BPF D642,D643 80MR3 ATT Q906 Q907 RF AMP Q908 80MR3 ATT D908 RF AMP Q780 RF AMP Q641 AGC Q903,D644 BPF D645,D646 0.52M-1.71MHz LPF ANTSW EARANT 76M-108MHz LPF ANT SW RF SW BTVIN D782,D783 D781 HV BTL4.2V SP REG IC17 5VS PSC SW REG IC4 PCON +5V TXI-V VCC-I CHGC CHGH T3C_INV +5V CURRENT REG DETECT. IC5,D9 IC15 Q17,Q19 3VS T3C CHG CTRL. Q10,Q11 IC8 VCC DC SW IC1,Q1,Q2,Q3,Q8,D1,D3,D4 CHG BTDET VCC J2 + CP1 CP2 S CP2 - 10-2