Icom IC-R20 Service Manual - Page 62

11-4 1STAVCO BOARD 3.0V R48 2.3V 1k C31 R46 0.01 1k C60 0.01 R57 JPW [SEA], [EXP] only R57 1k R56 JPW [SEA], [EXP] only R56 1k R55 JPW [SEA], [EXP] only R55 1k 3.0V J1 VP GND PLLASTB PLLDATA PLLCK APS OSC 1 2 3 4 5 6 7 C59 R47 R49 0.01 1k 180k Q13 2SC5277 C40 0.01 IC3 MB15T61UL 20 21 22 23 24 GNDOSC SWA2 SWB2 GNDDIG SWA1 R28 15k C38 R24 R23 0.68 3.3k 1k Q7 2SC4117 C39 C35 0.68 0.0033 R26 6.8k R27 8.2k Q6 2SK880 R25 220 C37 1 R35 2.7k 1AVCO R1 C48 0.01 47 C3 3p L1 D2 C2 L3 0.22µH 1SV245 0.001 15nH C1 0.001 D1 L2 1SV245 0.22µH L4 1µH Q1 2SC5006 C7 0.5p C4 R2 4p 220 R3 4.7k C5 C6 R4 0.001 0.1 8.2k 2AVCO R6 47 L5 0.22µH C10 L6 0.001 18nH L7 1µH C16 3p C14 0.5p C9 0.001 D3 HVC417C Q2 C11 R7 2SC5006 2p 220 R8 4.7k 1 2 3 4 5 6 7 SWB1 DORF1 SW1 SW2 DORF2 VPRF LD/FOUT OSCIN CLOCK DATA LE VCCSD GNDRF VCCRF 19 18 17 16 15 14 13 C61 0.1 FINRF1 FINRF2 XFINRF GNDRF PS 12 11 10 9 8 R32 150 C62 R50 R51 R52 0.1 100k 100k 100k R30 220 2.6V R31 82k C44 0.001 C41 0.001 C42 0.001 C43 C63 0.001 R29 100k Q8 2p 2SC5231 3.0V 2.8V R53 C64 10 C67 0.001 82 [EUR], [UK], [USA], [CAN] only C58 3.1V 0.1 R5 220 C8 0.1 R36 4.7k C54 0.001 D7 1SV308 Q12 XP1113 4 3 2 5 1 C66 C65 10 10 4 3 2 5 1 Q11 XP1113 J2 +3V A_R3V A_VCO1 A_VCO2 A_VCO3 GND GND A_VCO_OUT 1 2 3 4 5 6 7 8 R10 220 C15 0.1 R37 4.7k C55 0.001 D8 1SV308 1.67V 3.0V R33 C53 33 0.001 R43 82k R44 220 R45 1k R42 C50 47 5p C52 0.001 Q9 2SC5231 C12 C13 R9 0.001 0.1 8.2k 3AVCO R11 47 C19 8p R54 L8 C18 L9 L10 C23 47 0.22µH 0.001 27nH 1µH 0.5p C17 0.001 D4 HVC417C Q3 2SC5006 C20 4p R12 220 R13 4.7k C21 C22 R14 0.001 0.1 8.2k R15 330 C24 0.1 R38 4.7k C56 0.001 D9 1SV308 R41 15 IC2 C47 µPC2746TB 0.001 3 2 1 GND GND IN OUT GND VCC 4 5 6 2.0V 3.0V R34 220 C46 0.001 to RF unit HJ3 to RF unit HJ2 1.13V C49 10p 1STAVCO BOARD R40 4.7k Explanatory notes VOLTAGE LINE 11-5 1STBVCO BOARD C31 R46 0.001 1k 3.0V R47 2.3V 1k C60 0.01 C59 R48 R49 0.01 1k 180k Q12 2SC5277 C40 0.01 IC3 MB15T61UL 20 21 22 23 24 GNDOSC SWA2 SWB2 GNDDIG SWA1 R28 15k C38 C39 R24 0.68 0.68 3.3k Q7 2SC4117 C35 0.0033 R26 6.8k R27 Q6 8.2k 2SK880 R23 1k R25 220 C37 1 R35 2.7k 1BVCO R1 47 C3 C48 2p 0.01 L1 D2 C2 L3 L4 0.22µH 1SV245 0.001 12nH 1µH C7 0.5p C1 0.001 D1 L2 1SV245 0.22µH Q1 C4 R2 2SC5006 2p 220 R3 4.7k C5 C6 R4 0.001 0.1 8.2k 2BVCO R6 47 C16 4p L5 0.22µH L6 12nH L7 1µH C9 0.001 C10 0.001 D3 HVC417C Q2 2SC5006 C14 0.5p C11 R7 2p 220 R8 4.7k 1 2 3 4 5 6 7 SWB1 DORF1 SW1 SW2 DORF2 VPRF LD/FOUT OSCIN CLOCK DATA LE VCCSD GNDRF VCCRF 19 18 17 16 15 14 13 R57 1k R57 JPW [SEA], [EXP] R56 1k R56 JPW [SEA], [EXP] R55 1k R55 JPW [SEA], [EXP] 3.0V FINRF1 FINRF2 XFINRF GNDRF PS 12 11 10 9 8 C61 C62 R50 R51 R52 0.1 0.1 100k 100k 100k R32 150 R30 220 2.6V R31 C44 82k 0.001 C41 C42 0.001 0.001 C63 R29 0.001 100k Q8 C43 3.0V 2SC5231 2p J1 VP 1 GND 2 PLLBSTB 3 PLLDATA PLLCK BPS OSC 4 5 6 7 C68 2.8V R53 C64 0.001 82 10 [EUR], [UK], [USA], [CAN] only 3.1V C58 0.1 R5 180 22 C54 [SEA], 0.001 [EXP] C8 0.1 R36 4.7k D7 1SV308 Q10 4 3 XP1113 2 5 1 C66 C65 10 10 4 3 2 5 1 J2 +3V B_R3V B_VCO1 B_VCO2 B_VCO3 B_VCO4 GND B_VCO_OUT R10 220 22 [SEA], [EXP] C15 C55 0.1 0.001 R37 4.7k D8 1SV308 Q11 C67 XP1113 10 1.7V 3.0V R33 C53 33 0.001 R44 220 R45 1k R43 R42 C50 82k 47 5p C52 0.001 Q9 2SC5231 C12 C13 R9 0.001 0.1 8.2k to RF unit HJ7 to RF unit HJ6 R54 47 C17 0.001 3BVCO R11 47 C19 8p L8 C18 L9 0.22µH 0.001 27nH L10 1µH D4 HVC417C Q3 C20 2SC5006 4p C23 0.5p R12 220 R13 4.7k C21 C22 R14 0.001 0.1 8.2k R15 470 C24 0.1 R38 4.7k C56 0.001 D9 1SV308 R41 15 IC2 µPC2746TB C47 0.001 3 2 1 GND GND IN OUT GND VCC 4 5 6 2.0V 3.0V R34 220 C46 0.001 C27 0.75p 4BVCO L11 D5 0.27µH HVC417C C28 R16 0.75p 6.8k C29 R18 0.001 6.8k C25 0.001 C26 0.001 L12 22nH Q4 2SC5006 R17 120 L13 47nH R19 L14 330 47nH C45 Q5 0.5p 2SC5006 C30 0.001 C57 R39 0.001 4.7k D10 1SV308 C49 10p 1.13V R40 4.7k Explanatory notes VOLTAGE LINE 1STBVCO BOARD 11 - 5