Icom IC-R20 Service Manual - Page 63

11-6 2NDCVCO BOARD 1CVCO R4 1k 2.3V 2.4V Q4 2SC4617 3.0V A_R3V L2 33nH C30 0.001 C32 10 R21 1k C31 0.001 J1 A_R3V GND APS C_VCO_OUT GND 1 2 3 4 5 to RF unit HJ5 C6 0.001 L4 0.22µH L1 18nH C3 C4 15p 10p R1 47 C33 C2 D1 2p 18p 1SV314 R2 10k C5 12p 6 1 5 2 4 3 Q1 R3 FH102 1k C7 4p C9 5p L3 22nH C8 1p C10 5p C_VCO_OUT R10 100 C1 0.33 1.7V PLLCSTB PLLDATA PLLCK APS R13 R12 R11 1k 1k 1k C18 47p C19 47p C20 47p R22 330 R15 820 IC1 MB15E03SL R14 10 9 10 11 12 13 14 15 16 CLK DAT LE PS ZC L/F P R FIN XFIN GND DO VCC VP OSCO OSCI 8 7 6 5 4 3 2 1 C27 0.001 C21 4.7 Explanatory notes VOLTAGE LINE C17 R9 5p 56 C16 470p 3.0V APS PLLCSTB PLLDATA PLLCK A_R3V +3V J2 PLLCSTB PLLDATA PLLCK +3V GND OSC 1 2 3 4 5 6 to RF unit HJ4 OSC R19 1k 2.3V C25 0.001 R18 1k C23 0.01 R17 180k C22 R16 C26 C24 0.1 0.01 Q3 0.01 1k 0.7V 2SC5277 2NDCVCO BOARD 11-7 2NDDVCO BOARD 1DVCO R4 1k 2.3V Q4 2.4V 2SC4617 R21 1k L2 47nH C30 0.001 C32 10 3.0V B_R3V C31 0.001 J1 B_R3V GND BPS D_VCO_OUT GND 1 2 3 4 5 R1 L4 L1 47 0.22µH 22nH C2 D1 56p HVC305B C1 0.33 C6 0.001 C3 C4 22p 12p R2 47k C5 27p 6 1 5 2 4 3 Q1 R3 FH102 330 C7 10p C9 8p 1.7V L3 22nH C8 4p C10 8p D_VCO_OUT R10 100 PLLDSTB PLLDATA PLLCK BPS R13 R12 R11 1k 1k 1k C18 47p C19 47p C20 47p R22 330 R15 820 R14 10 C27 0.001 IC1 MB15E03SL 9 10 11 12 13 14 15 16 CLK DAT LE PS ZC L/F P R FIN XFIN GND DO VCC VP OSCO OSCI 8 7 6 5 4 3 2 1 C21 4.7 Explanatory notes VOLTAGE LINE C17 R9 5p 220 C16 470p 3.0V BPS PLLDSTB PLLDATA PLLCK B_R3V +3V J2 PLLDSTB PLLDATA PLLCK +3V GND OSC 1 2 3 4 5 6 OSC R19 2.3V 1k C25 0.001 R18 1k C23 0.01 R17 180k C22 R16 C26 0.1 C24 0.01 Q3 0.01 1k 0.7V 2SC5277 2NDDVCO BOARD to RF unit HJ9 to RF unit HJ8 11 - 6