Icom IC-R20 Service Manual - Page 60

11-2 LOGIC UNIT LCD_RS LCD_RESET B_R3C BFOC CIV_IN LCD_CS A_TCON A_R3C B_AF_THURU KR0 KR1 KR2 KR3 KR4 KR5 I0 I1 KS0 KS1 KS2 KS3 B_DCK B_DUD A_DCK A_DUD 3.1V CK DATA R30 IC6 1k SN74AHC1GU04DBVR CK DATA R217 100k MP5 CPU3V C23 0.1 R17 10k R21 3.3k R25 3.3k PLLBSTB PLLDSTB PLLCK PLLESTB PLLCSTB PLLASTB R35 1k R42 1k R43 15k R51 1k R45 10 R58 150k R59 150k R60 150k R61 150k 3.2V CPU3V B_TCON PCON +3S BFO_SHIFT CW/BFO_ON 2.8V BFOC R85 100 C50 C53 0.1 0.01 Q11 UNR9113J 1 2 3 1 2 3 5 4 R96 1M C56 0.01 X2 CSBFB453K R93 R97 1M 1M 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 C2 0.001 C3 0.001 C4 0.001 C5 0.001 C6 0.001 C8 0.001 C9 0.001 C10 0.001 C11 0.001 C12 0.001 C14 0.001 R1 3.3k LD2 B_VCO2 B_VCO3 B_VCO4 R5_10k VOL_UP_DOWN TEMP BATTIN R2_10k HVIN B_RSSI R6_10k A_VSCAF A_CTONE B_CTONE A_RSSI R3_10k B_RTONE B_VSCAF A_RTONE CPU3V A_VCO2 CPU3V C1 IC1 R9 0.1 CAT24WC256 47k 1 2 3 4 A0 A1 NC VSS VCC WP SCL SDA 8 7 6 5 R10 10k C13 0.1 ECK ESIO 76 77 78 P12/D10 P11/D9 P10/D8 79 P07/D7 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 P06/D6 P05/D5 P04/D4 P03/D3 P02/D2 P01/D1 P00/D0 P107/AN7/KI3 P106/AN6/KI2 IC3 M30620MCP-130GP [USA] only M30620MCP-129GP [OTHER] P105/AN5/KI1 P104/AN4/KI0 P103/AN3 P102/AN2 P101/AN1 AVSS P100/AN0 VREF AVCC P97/ADTRG/SIN4 P96/ANEX1/SOUT4 P95/ANEX0/CLK4 99 100 P94/DA1/TB4IN P93/DA0/TB3IN P92/TB2IN/SOUT3 P91/TB1IN/SIN3 P90/TB0IN/CLK3 BYTE CNVSS P87/XCIN P86/XCOUT XOUT VSS XIN R11 1k P42/A18 P43/A19 P44/CS0 P45/CS1 P46/CS2 P47/CS3 50 49 48 47 46 45 P50/WRL/WR 44 P51/WRH/BHE 43 P52/RD 42 P53/BCLK 41 P54/HLDA 40 P55/HOLD 39 P56/ALE 38 P57/RDY/CLKOUT 37 P60/CTS0/RTS0 36 P61/CLK0 35 P62/RXD0 34 P63/TXD0 33 P64/CTS1/RTS1 32 P65/CLK1 31 P66/RXD1 30 P67/TXD1 29 P70/TXD2/SDA 28 P71/RXD2/SCL 27 P72/clk2/TA1OUT 26 P73/CTS2/RTS2 P13/D11 P14/D12 P15/D13/INT3 P16/D14/INT4 P17/D15/INT5 P20/A0(/D0/-) P21/A1(/D1/D0) P22/A2(/D2/D1) P23/A3(/D3/D2) P24/A4(/D4/D3) P25/A5(/D/D4) P26/A6(/D6/D5) P27/A7(/D7/D6) VSS P30/A8(/-/D7) VCC P31/A9 P32/A10 P33/A11 P34/A12 P35/A13 P36/A14 P37/A15 P40/A16 P41/A17 +3V R74 R76 R83 47k 47k 47k R63 10k R66 1k R67 1k R68 1k R69 10k STR2 PLLDATA HFC R77 1k B1C B3C B2C LD1 LIGHT +3SC CHGC CHGS CKO REC CK VRSTB DATA EP13 MZA2010D121C A_VCO1 CIV_OUT CIV_IN SUB_3C R82 47k 24 P74/TA2OUT/W 23 P75/TA2IN/W 22 P76/TA3OUT 21 P77/TA3IN 20 P80/TA4OUT/U 19 P81/TA4IN/U 18 P82/INT0 17 P83/INT1 16 P84/INT2 R70_JPW R71_JPW R72_JPW R73_JPW 15 P85/NMI 14 VCC 10 RESET 25 11 12 13 1 2 3 4 5 6 7 8 9 RESET R4 10k B_NOISE A_NOISE BEEP BFO_SHIFT CPU3V CPU3V IC2 BD5228G 1 2 3 OUT VDD VSS CD 5 4 NC C7 0.01 POWER KR0 RESET C16 0.001 CPU3V DATAC CNVSS CLS1 CLS0 R18 10k R22 JPW R24 1k R26 1k R31 47k R36 4.7k C24 0.001 R27 R28 10 1M C27 0.01 C22 15p X1 CR-717 C28 470p D14 HVC376B R52 R215 C30 100k JPW 1 R47_2.2M R62 R216 100k JPW C35 1 RXD TXD SQL A_AF_THURU B_AMUTE AFON HVDET CKO CPU3V C45 R87 0.1 39k Q14 2SA1588 C61 0.001 4 5 6 R86 100k Q13 XP6501 3 2 1 +3SC C51 0.001 R88 R94 C62 R98 4.7k 47k 4.7 33k CK PCON DATA CK DATA B_TCON B_RTONE A_TCON A_RTONE POWER TXD RXD SCLK BUSY S1 S7 S18 DW MAIN KR1 POWER S2 S8 S13 S19 Q1 2SC4617 DATAC 3.6V +3V +3V R214 JPW B_CTONE DATA +3S +3V B_R3V +3S +3V B_R3V BFO CPU3V Q37 2SA1588 Q38 XP4601 6 54 C73 0.01 C65 0.01 R103 33k C188 R201 0.001 470k R200 8.2k C186 0.001 C74 C187 470p 0.001 D18 HN2V02H-B 123 R207 R208 100k C54 100k 0.1 +3V +3V Q17 2SA1588 C68 0.001 R104 470k R105 6.8k C69 0.001 CPU3V C82 22 5 4 VOUT VDD GND NC CE 1 2 3 IC8 R1111N321B C83 22 5 4 VOUT VDD GND NC CE 1 2 3 IC9 R1111N321B R111 JPW C105 4.7 C98 4.7 C77 0.001 C89 0.001 R210 100k 3.2V 3.6V C90 4.7 CK DATA C106 33 VP Approx. 12V 3.1V C191 +3V 0.1 L1 C194 10µH 1 1 8 2 7 3 6 4 5 C131 1 C135 1 C143 1 C149 1 IC11 TC7W04FU D22 1SS372 D23 1SS372 D24 1SS372 D25 1SS372 Q28 C152 1 2SC4617 R167 10k C162 0.1 C159 4.7 C126 1 C132 1 C138 1 C144 1 C114 0.001 CK DATA B_R3V B_R3V B_TCON C87 C91 0.001 0.001 Q20 UNR9115J B_RTONE R112 R115 120k 12k R130 180k R131 820k C92 C99 0.0022 0.022 C108 R126 0.1 470k A_R3V A_TCON C88 C93 0.001 0.001 Q21 UNR9115J A_RTONE R113 R116 120k 12k R132 180k R133 820k C94 C100 0.0022 0.022 C109 R127 0.1 470k B_CTONE R139 82k C127 470p R143 470k 1 8 2 7 3 6 4 5 IC12 LM2904PWR TSQL/DTCS/VSC ON 2.9V R157 82k C139 0.001 C145 0.015 R148 150k C140 100p R149 39k C150 R165 C153 0.001 39k 0.1 B_DET B_VSCAF R140 82k C128 470p R144 C141 470k 0.001 TSQL/DTCS/VSC ON 2.9V R162 82k C146 0.015 A_DET 1 8 2 7 3 6 4 5 IC13 LM2904PWR R150 150k C142 100p C151 R166 C154 0.001 39k 0.1 R151 39k R168 100k R174 100k C160 330p C163 330p A_VSCAF B_DET VP BAND VFO MODE MR KR2 Q4 2SC4617 EP7 EAR A_CTONE A_CTONE R169 R175 100k 100k A_DET CIV_IN CIV_OUT LIGHT REC +3V AFOUT A_AIN S3 S9 S14 S20 1 2 3 SCOPE KR3 S4 S10 S15 S21 4 5 6 0 KR4 S5 7 S11 8 S16 9 . S22 KR5 S6 > D3 D6 1SS400 1SS400 D2 D5 MA2S728 MA2S728 [SEA], [EXP], [CAN] [USA] only only B3 B2 S17 PLAY D9 1SS400 B1 S23 REC D12 1SS400 B0 I1 KS3 KS2 KS1 D2 D5 D8 D11 MA2S728 MA2S728 [USA] only [EUR] only KS0 CPU3V LIGHT LIGHT R12 R14 R19 R23 R29 1k 82 82 82 82 DS1 DS2 DS3 DS4 R32 R38 R49 R53 R55 R202 1k 82 82 82 82 82 DS5 DS6 DS7 DS8 DS9 Q5 2SC4617 EP12_CV1081 R33 100k R203 82 R204 82 R205 82 DS1-DS9_SML-512UW Q36_2SC4617 C29 0.1 R206 82 R198 100k C185 0.001 R199 220 REC DS11 SML-512UW C26 0.001 3.2V Q3 3.1V 2SA1586 +3V R15 R20 IC4 100k 100k TC7W04FU 1 8 2 7 3 6 4 5 R39 10k R40 10k R41 12k D13 1SS400 R34 Q6 10k 2SC4116 AFON R56 4.7k R54 C31 10k 0.47 1 CPU3V 2 CNVSS 3 RESET 4 TXD 5 RXD 6 SCLK 7 BUSY 8 9 R7 10k CNVSS RESET TXD RXD SCLK BUSY CPU3V R8 47k R213 C36 JPW 82p 3.1V IC14 TC7S08FU 1 5 2 3 4 DATA IC15 TC7S08FU 1 5 2 R209 3 4 100k R211 470 D R212 470 CLK CK Q7 XP1501 5 4 123 C40 C41 33 0.1 Q9 2SB1132 Q8 2SA1588 R64 470 C38 3.3 C34 220 EP8 C39 0.1 3.3V_SQL_OPEN IC5 TA31056F 8 7 6 5 VCC IN TB VREF OUT NF GND COMP 1 2 3 4 A_R3V 3.0V Q10 2SA1362 3.0V Q15 2SA1362 DATA A_R3C C48 0.001 R90 4.7k R89 C55 470k 0.001 C59 0.001 R100 JPW R99 C64 470k 0.001 C52 0.001 C63 0.001 B_R3C VRSTB CLK D C46 C49 1 0.1 A_R3V CK +3S C57 C60 1 0.1 3.0V Q12 2SC4617 R84 10k C47 R91 0.1 5.6k Q16 2SC4617 R95 10k C58 R101 0.1 5.6k VRSTB A_R3V CLK D +3S IC7 C189 SM6451B 0.001 +3S 1 2 3 4 5 6 7 8 RSTN ADRS1 ADRS2 DVDD LOUT LIN AVDD VRL MDT MCK MLEN DVSS ROUT RIN AVSS VRR 16 15 14 13 12 11 10 9 C70 C80 10 10 Explanatory notes VOLTAGE LINE RX LINE B_R3V C95 0.1 C101 0.1 R118 10 3.0V R119 C115 C117 12k 0.1 1 Q24 XP6501 6 5 4 C161 C164 330p 330p C136 R152 R158 270p 180k 2.2M R106 JPW Q19 C86 0.1 2SJ144 C103 0.1 R124 D20 C119 470k 1SS400 0.1 1 2 3 C147 C155 680p 470p R176 C169 390k 0.01 B_DET C84 C85 0.0047 0.1 C112 0.1 R134 82k C133 R153 820p 180k C165 0.0022 R107 R108 R110 R114 1M 470k 82k 2.2M C96 0.1 BEEP AOUT B_AMUTE A_AIN A_R3V R117 R120 C110 1M 820 0.1 Q22 2SC4617 B_AIN R121 10 R128 180k R135 C122 R141 100k 0.1 15k C123 0.1 B_AF_THURU R145 100k R159 470k Q27 2SJ144 R154 2.2M R163 1M 3.0V R170 2.2M C156 0.1 R177 C170 180k 0.1 C166 0.0018 B_AF_THURU B_AIN B_AMUTE AOUT BEEP A_AIN C97 C102 R122 0.1 0.1 10k C116 0.1 C118 1 Q25 XP6501 6 5 4 C137 R155 R160 270p 180k 2.2M 3 2 1 C190 0.1 C104 R125 C113 D21 C120 0.1 470k 0.1 1SS400 0.1 C148 C157 680p 470p R178 C171 390k 0.01 A_DET Q23 2SC4617 R123 820 R136 82k C134 R156 820p 180k C111 R129 R137 C124 R142 R146 0.1 180k 100k 0.1 15k 100k Q26 2SJ144 R161 470k R172 C167 2.2M 0.0022 C158 0.1 R179 C172 180k 0.1 RECORDING LINE PLAYBACK LINE C125 0.1 R147 2.2M R164 1M C168 0.0018 A DIAL S24 A2 B COM 3 1 B DIAL S25 A2 B 3 1 COM C20 47p C21 47p EP1 A_DCK EP2 A_DUD C18 47p EP3 B_DUD EP4 B_DCK C19 47p AFOUT +3V C42 C43 C44 100p 4.7 4.7 AFOUT +3V LOGIC UNIT A_AF_THURU A_AF_THURU C66 1 C67 1 C71 1 C72 1 C184 1 C75 1 C76 1 C78 1 C79 1 C81 1 LCD_CS LCD_RESET LCD_RS CK DATA J9 23 25 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 24 to_LCD DS12 M3-0243TIY J5 TEMP CPU3V HVIN 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 C179 0.001 C181 C192 0.001 0.1 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 1 40 2 39 3 38 4 37 5 36 6 35 7 34 8 33 9 32 10 to RF unit J1 31 11 30 12 29 13 28 14 27 15 26 16 25 17 24 18 23 19 22 20 21 D26 1SS400 D30 1SS400 C174 R191 0.1 100k C175 R193 0.1 100k R192 180k R190 47k CP6 S S26 BATTIN D27 1SS400 D31 1SS400 VCC C176 0.1 R194 100k R195 180k VCC 3.7V C182 0.001 CPU3V Q31 C107 HAT1023R 10 8 7 6 5 D D D D S S S G 1 2 3 4 R183 1k D34 SB07-03C C177 D35 0.001 MA2S728 D29 Q30 2SB1201 SB07-03C EP9 C183 0.0047 C178 C196 EP10 0.001 0.1 C173 0.001 R185 12 R181 68 R182 1.2k D28 MA2S111 R186 R196 12 6.8 Q33 2SB1132 R189 1k R197 6.8 Q35 UNR9213J CP1 Li+ CP3 CP4 Li- CP2 J6 EXT DC CP5 B GND R184 82 D36 MA133 Q32 R180 2SC4617 47k CPU3V R187 1k Q34 UNR9215J CHGC CHGS R188 150 C180 0.001 HVDET Q29 UNR9213J SUB_3C VOL_UP_DOWN SQL TXD RXD AOUT A_AIN B_AIN D32 D33 MA2S111 MA8027 +3V R13 120k C193 0.1 (HJ9) +3V SUB_3C VOL_UP_DOWN SQL TXD (CPU_TX) RXD (CPU_RX) (HJ8) AOUT A_AIN B_AIN GND 1 2 3 4 to REC unit J7 5 6 1 2 to REC unit 3 J6 4 AFOUT AFOUT +3V C37 C33 47p 0.001 AFOUT AFOUT R57 JPW EP6 EXT SP J3 J8 AFOUT 2 GND 1 4 INT SP 3 11 - 3