Icom IC-R20 Service Manual - Page 59

B_R3V IFO16 ATT AGC A B_VHFC B_UHFC B_GC B_800MC ANTSW B_TRAC A_ATTC IFO10 A_R3V A_R3V A-AGC B B_VHFC B_UHFC B_GC B_800MC B_WFMC B_VCO1 B_ANLC OSC A_R3V A_NOISE A_RSSI A_WFMC A_DETFM BFO A_DETSSB +3V B_R3V AGC ATT B_WFMC AM/NFM CONT R425 1k D130 MA2S077 C754 0.001 R521 47 D131 MA2S077 C885 C757 0.001 0.1 L102 2.7µH FI7 FL-293 19.650 MHz 1 2 R430 10k R426 680 C752 22p R537 56 C753 34 22p D132 D133 MA2S077 MA2S077 R427 100 C755 470p R428 10k C756 0.1 R429 10k WFM_CONT WFM 2.9V OSC AGC B_R3V C882 0.001 C758 0.001 R432 15k R431 220k Q542 2SC5006 B_R3V L104 3.3µH C759 0.001 R434 180 R433 1k C760 0.001 D172 MA2S728 433 MHz 1.5V R505 12k B_R3V C869 0.01 C761 0.001 R435 47k B_NOISE B_RSSI C762 100p C766 0.01 R503 1.5M R518 1k C870 0.01 C871 0.01 CP12 Q555 2SC5006 C765 10p L105 LS-510 B_NOISE B_RSSI B_R3V AGC AGC ATT WFM_CONT R461 10k ATT B_R3V B_R3V C775 10 C776 0.22 433 MHz 3.0V 3rd_Lo B_R3V R444 1k 16 MIXIN 15 GND 14 N-REC 13 N-DET 12 RSSI 11 IFOUT 10 QUAD 9 AFOUT OSCIN 1 OSCOUT 2 MIXOUT 3 4 VCC 5 IFIN 6 DEC FILOUT 7 FILIN 8 IC17 C768 470p TA31136FN R439 1.5k B_R3V R438 100k R440 47k C764 0.001 Q543 UNR9113J R436 2.2k R437 22k C767 0.22 R443 470 C772 0.001 C880 0.001 C770 0.01 C771 R442 0.01 15k DET_OUT R441 680 WFM_CONT AGC C774 0.01 R519 4.7k C784 0.01 R445 10k C779 0.01 D134 1SS400 D135 1SS400 C777 0.01 R447 220 FI8 CFWM450E I O R446 10k C778 0.01 R448 2.2k C781 220p L106 470µH C782 220p C780 0.1 D136 1SS400 D137 1SS400 R449 2.2k C773 0.1 C769 470p C785 15p R451 3.3k R452 150k R453 D138 150k MA2S728 AGC C786 150p 45 32 CP11 R454 R455 100k 1k C788 0.01 R457 47k R527 6 10 Q544 XP6501 456 Q545 XP6501 1 C791 10 321 C792 0.01 R458 1M C789 0.001 R459 470k R462 3.9k D139 C795 R466 MA2S728 0.1 4.7k C794 R464 0.001 10k R465 22k C797 R467 0.001 100k AM_DET AM/NFM_CONT R450 10k C783 0.1 WFM_CONT AM/NFM CONT Q553 XP1113 B_AM FM 4 3 B_R3V 2 B_WFMC 5 1 WFM CONT 456 321 C793 0.01 C881 0.001 Q546 XP4312 AM MODE C790 0.01 IC21 CD4066BPWR 1 2 3 4 5 6 7 I/O1 VDD O/I1 CONT1 O/I2 CONT4 I/O2 I/O4 CONT2 O/I4 CONT3 O/I3 VSS I/O3 14 13 12 11 10 9 8 B_R3V B_AMC B_DET B_R3V D_VCO OUT B_RXV B_VCO1 B_VCO OUT WFM_CONT R463 10k C796 0.22 ANL_CONT Q547 BPS UNR9213J B_ANLC SSBC A_AMC D CLK LD1 A_ANLC B_WFMC A_ATTC A_DETAM A_DETSSB BPS NBC A_WFMC APS B_NOISE B_RSSI A_TRAC A_NFMC A_VCO3 ATT A_UHFC A_300MC A_VHFC A_DETFM LD2 B_AMC B_AM FM 1GLO 2GLO DOWN_CONV STR2 IC20 M62366GP 1 2 3 4 5 6 7 8 9 10 VSS AO3 AO4 AO5 AO6 AO7 AO8 AO9 AO10 VDD GND AO2 AO1 DI CLK LD DO AO12 AO11 VCC 20 19 18 17 16 15 14 13 12 11 +3S C867 0.01 D CLK D ANTSW IC22 CD4094BPWR D 1 2 3 4 5 6 7 8 STR D CLK Q1 Q2 Q3 Q4 GND V+ OE Q5 Q6 Q7 Q8 Q'S QS 16 15 14 13 12 11 10 9 +3S 3.0V +3S D CLK +3S FSET C740 0.01 IC14 M62366GP 1 2 3 4 5 6 7 8 9 10 VSS AO3 AO4 AO5 AO6 AO7 AO8 AO9 AO10 VDD GND AO2 AO1 DI CLK LD DO AO12 AO11 VCC 20 19 18 17 16 15 14 13 12 11 +3S IC12 CD4066BPWR A_DET R397 100k 1 2 3 4 5 6 7 I/O1 O/I1 O/I2 I/O2 CONT2 CONT3 VSS VDD CONT1 CONT4 I/O4 O/I4 O/I3 I/O3 14 13 12 11 10 9 8 NB-ON 2.9V +3S SSB3V A_R3V Q535 XP1113 4 R398 100k 5 D121 DAP222 A_WFMC 3 A_NFMC 2 A_R3V 1 A_AMC LD1 A_DET CLK SSB3V D +3S OSC R204 1k D58 MA2S077 C18 0.01 B_TRAC B_ATTC OSC ANTSW 1.6V R512 3.9k C877 0.01 R516 100k R513 220k X1 CR-593 19.200 MHz C878 0.01 C873 220p R515 100k C694 0.1 C879 10p Q556 2SC4617 C875 68p C874 18p D171 HVC350B R514 2.2k C876 56p 1.8V OSC L134 4.7µH R517 1k R415 1.5M C424 0.01 R414 Q540 12k 2SC5006 A_R3V R354 27k R352 100k R353 47k R355 1.5k R356 270 C697 0.01 R358 1.5k Q521 2SC4617 R357 330k C699 220p 45 32 R360 2.2k R359 220k 6 Q525 XP6501 1 C698 0.01 Q522 2SC4617 R361 150k C700 0.01 Q523 C705 0.1 2SC4617 NB-ON 1.0V R362 150k C703 0.47 R363 C701 R364 4.7k 0.01 56k R367 220k R366 100k C702 0.1 Q526 UNR9113J Q524 2SC4617 Q527 UNR9113J R365 22k R368 15k R369 330 R370 10k C704 0.01 C893 0.01 Q528 2SC5006 C706 0.001 R372 100k 19.200 MHz C744 0.01 SSB3V SSB3V C894 0.01 R530 4.7k CW 2.9V SSB3V SSB3V Q519 UNR9113J OSC R520 47 C884 0.001 L73 2.7µH C201 0.1 FI3 FL-293 19.650 MHz 1 2 R205 10k D59 MA2S077 C427 22p 34 C430 R209 0.01 680 D60 D61 MA2S077 MA2S077 R203 100 R536 56 R207 C745 10k 470p C202 0.1 R208 10k WFM 2.9V D106 1SS400 A_R3V D107 1SS400 C74 0.001 R35 15k R36 220k C431 0.001 Q5 2SC5006 R34 1k L17 3.3µH C102 0.001 C75 0.001 R62 180 C103 0.01 C73 0.001 C259 100p A_R3V CP2 R103 10k SSB3V A_R3V SSB3V A_R3V C741 0.01 A_R3V A_R3V 145 MHz 3.0V R68 47k C101 10p L21 LS-510 C659 10 16 15 14 13 12 11 10 9 C241 0.22 IC2 TA31136FN MIXIN GND N-REC N-DET RSSI IFOUT QUAD AFOUT OSCIN OSCOUT MIXOUT VCC IFIN DEC FILOUT FILIN C94 0.001 Q41 UNR9113J R55 R54 2.2k 22k A_R3V C242 0.22 R159 1k 1 2 3 4 5 6 7 8 C98 470p R60 100k C99 470p R56 470 R59 1.5k C97 0.01 C96 R57 0.01 15k C896 0.01 C93 0.001 C95 0.001 CP1 C239 0.01 C100 C92 0.1 0.01 R61 47k R58 680 D57 MA2S728 D110 1SS400 R346 10k C691 0.01 C688 0.01 FI6 CFWS450K3 I O R529 C692 470 0.01 R49 10k C221 0.01 D109 C689 1SS400 0.01 D108 1SS400 R46 4.7k C686 390p FI2 CFWM450E I O R50 10k C690 0.01 R542 15k D112 1SS400 L99 470µH C687 390p C922 150p D111 1SS400 R174 4.7k C64 15p R179 150k R30 3.3k C63 150p R177 R31 1k C65 0.01 100k R116 150k 4 56 R525 R526 10 10 32 1 R26 47k 56 32 1 R347 10k D113 1SS400 C203 0.1 R172 10k C66 0.01 Q534 XP1113 D119 DAP222 A_AMC 4 3 2 5 1 A_WFMC C434 0.1 A_R3V 45 6 32 1 SSBC A_AMC D117 DAP222 C433 0.001 NBC A_R3V +3S SSBC A_NFMC STR2 B_RSSI B_NOISE +3S LD2 B_DET APS A_R3V A_R3V Explanatory notes VOLTAGE LINE RX LINE C264 0.001 D165 MA2S728 C713 0.1 CW 2.6V R379 R380 1.5M 2.7k SSB3V R381 330 R382 1.5k C712 0.1 C711 0.1 Q530 2SC4617 R396 22k C889 0.1 C714 0.01 R386 2.2k R384 47k Q531 2SC4617 R388 2.2k R389 2.2k R385 100k R383 1.5k C715 R387 0.01 2.2k A_R3V D115 RB876W C717 0.1 D116 RB876W R390 27k C716 470p Q1 XP6501 SSB3V CW 2.9V C200 0.01 C62 10 R391 10k R392 47k R394 27k C720 0.01 Q532 2SK1069 C718 C719 R393 0.01 0.001 22k R528 2.2k C890 0.1 Q4 XP6501 Q44 XP4312 R28 1M R29 C61 470k 0.001 C60 0.01 R373 3.9k C707 0.001 R374 10k C709 0.1 D114 MA2S728 R376 22k R377 4.7k C710 0.001 R378 100k A_R3V R375 10k C708 Q529 0.22 UNR9213J A_VCO3 A_DETAM A_ANLC A_R3V SSBC +3V SSB3V A_AMC A_WFMC +3S A_R3V B_R3V +3V B_R3V +3V B_R3V +3V +3V B_R3V PLLDSTB PLLDATA PLLCK +3V GND OSC HJ8 1 2 3 4 5 1 2 3 4 6 5 6 HJ9 B_R3V 1 GND 2 BPS 3 D_VCO OUT 4 GND 5 1 2 3 4 5 to 2NDDVCO BOARD J2 2NDDVCO BOARD to 2NDDVCO BOARD J1 +3V B_VCO2 B_VCO3 B_VCO4 R541 150 VP PLLBSTB OSC A_RSSI A_VCO2 A_NOISE A_VCO1 EAR BFO B3C B2C PLLESTB B1C HFC C918 0.001 HJ6 +3V B_RXV B_VCO1 B_VCO2 B_VCO3 B_VCO4 1 2 3 4 5 6 B_VCO OUT 7 8 C905 C904 C903 47p 47p 47p C902 47p HJ7 VP 1 GND 2 PLLBSTB 3 PLLDATA 4 PLLCK 5 BPS 6 OSC 7 1 2 3 4 5 6 7 to 1STBVCO BOARD J2 1STBVCO BOARD to 1STBVCO BOARD J1 C920 0.001 C402 0.001 A_RSSI A_VCO2 A_NOISE A_VCO1 EAR A_R3V LD1 A_DET CLK BFO D PLLASTB B3C PLLCSTB B2C PLLESTB B1C HFC VP STR2 PLLDSTB PLLDATA PLLBSTB PLLCK B_VCO4 +3V B_VCO3 B_RSSI B_VCO2 B_NOISE +3S B_R3V LD2 B_DET J1 1 40 2 39 3 38 4 37 5 36 6 35 7 34 8 33 9 32 10 31 11 30 12 29 13 28 14 27 15 26 16 25 17 24 18 23 19 22 20 21 LOGIC UNIT to LOGIC unit J5 A_R3V C_VCO OUT A_R3V +3V A_VCO1 A_VCO2 A_VCO OUT VP PLLASTB PLLDATA PLLCK OSC HJ5 A_R3V 1 GND 21 APS 32 C_VCO OUT 4 3 GND 54 5 HJ4 PLLCSTB 1 PLLDATA 2 PLLCK 3 +3V 4 GND 5 OSC 6 1 2 3 4 5 6 to 2NDCVCO BOARD J1 2NDCVCO BOARD to 2NDCVCO BOARD J2 R532 10 C909 100 C913 0.001 D179 1SS400 C908 C907 C914 C906 47p 47p 0.001 47p HJ2 +3V 1 A_VCO1 2 3 A_VCO2 4 A_VCO3 GND GND 5 6 7 8 C916 0.001 A_VCO OUT HJ3 C917 0.001 VP 1 GND 2 PLLASTB 3 PLLDATA 4 PLLCK 5 APS 6 OSC 7 1 2 3 4 5 6 7 to 1STAVCO BOARD J2 1STAVCO BOARD to 1STAVCO BOARD J1 11 - 2