Icom ID-51A Service Manual - Page 50

SECTION 10. BLOCK DIAGRAM FMPTX ATT 3VS HPF BPF LPF FM MAIN UNIT J5 3VS EXTMIC MC1 3VS MIC SW Q21 PTT CONT Q20 IC25 IC25 3VS MIC ATT AMP 3VS MMUTE SW DTCS Q7 LPF CTCOUT 3VS IC25 LINEAR CODEC D_AS 3VS DV DMO LPF DMOD MODE SW IC25 IC16 MMUTE PLAY 3VS ALC AMP LPF IC25 3.3V_VDD AUSTB CK SC_CLK SC_SDI SC_SDO SC_LR AURES DATA AUDI 3VS IC25 LINEAR CODEC IC390,Q390 DAFO BREC 3VS VOX AMP IC25 DTMF 3.3V_VDD Q19 CLK SHIFT 3.3V_VDD AMP IC17 12.288MHz X3 CLKIN DSP AD_CS AD_CS AD_CLK 3.3V_VDD A/D AADIN IC18 IC19 INTMIC EXTPTT DCSFT DSP_REQ,DSP_PD,DSP_SO,DSP_SI DSP_STB,DSP_DEMP,DSP_REMP DSP_CK FCS,SPI_RX SPI_TX,SPI_CLK DSP FLASH IC20 BREC AMP IC300 LPF Q302,Q300 S12 A B COM 2 3 1 DIUD1 F082EN7510W DICK1 A B COM 5 6 4 DIUD2 DICK2 CLONE CPU3 CLONE CLIN CLOUT IC8,Q11,Q13 D21,D23 LOG3 REMOTE RS 232C RX232 TX232 J4 IC2 TXLED BLED 3VS 5VS DIM LED LCD LIGHT DS7,Q8,Q9 G_VDD G_VDD EEP ROM IC3 DR_I2C_CLK GPS DR_I2C_DIO EP1 CHASSIS UNIT Q23,Q24,DS1 DS3,DS12,D33 KEY BACK LIGIT LIGHT Q23,DS2,DS4,DS5,DS6 DS8,DS9,DS10,DS11,D40 IC21 LOG3 LEVEL G_RXD CONV G_TXD,G_WKUP,G_HIB CLK SHIFT1 CLSFT1 D18 3VS TEMP DET TEMP CPU IC5 X2 12.288MHz SD_TXD SD_RXD SD_SCK SD_CS SD_SENC LCDDT LCDCK LCDRS LCDRES LCDCS ESIO ECK LPF BEEP DTMF CTCSS KR0-2 KS0-3 I0,I1 RES BTSENC BTDETO ATONE AMP IC300 AR3 ACTCIN DATA,CK,DALD AUNLK ARSSI ANOISE BRSSI BNOISE ACTCIN TONE FIL Q330 BCTCIN INTPTT PWRSW SQL BTONE PFMC,DSPC,GPSC,3VC VCO_SEL,PCON,R3C CHGC,CHGH DAFS,FMMUTE MAIN UNIT 3VS INTPTT WN,REMOTE APLLSTB,BPLLSTB T3C MMUTE,PLAY DTCS PWRSW LV,TEMP,TTEMP,DCIN,VIN BTVIN,BTDETO,BTDET TXI-V RTC_SDA RTC_SCL RTC_IRO REALTIME CLOCK IC IC4 D16 X1 32.768kHz SQLɹ BATTERY BT1 LPF 5VS LOG3 IC13 PS3 REG PCON IC12 3VS 3VS REG CPU3V G_VDD CVDD_1.3V 3VC IC10 GPS REG DCIN PFMC DSPC GPSC VIN 3.3V_VDD DVDD_3.3V IC11 DSP REG microSD J3 LCD J2 EEPROM IC7 KEYBOARD S1-S11 MATRIX D1-D12 BATT DET Q25 CPU3 RESET IC22 CPU3 DATA,CK,DASTB1,IOSTB1 IOEN BTDET 32kHz J4 CLONE EARANT BTL4.2V VO+ AF AMP VOIC2 AFON Q20 ATT EAR BTL4.2V BUFF IC20 RADIO A B SP1 CHASSIS UNIT LPF IC25 D/A IC25 VCOMOD REFMOD 3VS AAF AF FIL IC300,Q301 BEEP 3VS MODE SW IC390 FMMUTE DAFS LPF ADET 3VS BAF AAF DATA,CK,DALD D/A IC11 BUFF IC16 ASQLOUT ASQLIN BSQLOUT BSQLIN BREC BAFMUTE BAM BAF MUTE SW IC351 AF FIL IC350,Q350 BR3 BCTCIN TONE FIL Q370 IC9,D20 CPU3 REG Q29,D26 VCC SW 5VS 3VS IC953 I/O BUFF IC955 80MC,BAM2,VHFC,UHFC VAUBC,VBUAC,APPS,BPPS Q12,D22,D24 DCIN REG HV AR3 BR3 SW CTRL Q26,Q27,IC24 3VS R3 REG Q360 AR3C BR3C IC952 D/A DATA,CK,DASTB1,IOSTB1 IOEN RES_R,SEN_R,SCLK_R,SDIO_R EAR,WN TXMUTE,AVCO_SHIFT BVCO_SHIFT,ATT ABPF1_ISET1,APLLSW,BBPF1 ABPF2_ISET2,BPLLSW,BBPF2 RADIO IC IC441 BCATT BCC ANTSW BCIN 80RF VCOMOD REFMOD ASQLOUT ADET AUNLK ARSSI ANOISE BRSSI BNOISE BDETO BSQLOUT LOGIC UNIT MAIN UNIT 10-1