Download Icom 756PRO
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10-5 MAIN UNIT (2) C210 CP691 0.1 CP693 C215 10 D215 MA2S111 D216 MA2S111 C216 10 C643 0.0047 C217 0.1 (SEND(RL)) C691 0.0047 D632 MA2S111 D631 MA2S111 (ALC(EXT)) RL691 OMR-109F 9 7 8 C3652 0.01 SQLS R3723 15k SQLS AFMS R3724 1k AFMS 5 10 6 9 7 8 C3653 0.01 CIVE DRES_ 1 8 R3780 1k C3770 0.0047 DSFW DSDR DSFR DSKY R3709 R3710 R3711 R3712 CTFL RTDT M5V_ 1 230mV TCON R3706 1k J3502 MDAT R3727 1k C663 0.0047 C666 0.0047 C692 0.0047 2 L662 100uH L665 100uH J211 3LO from PLL unit J701 1 3 5 7 CP3008 2 4 6 8 J701 CIV CP702 (CI-V) KEY SSTB R3707 1k C3712 0.01 CP3002 C3711 0.01 CP3007 D3702 DAP222 CP3005 4 CIVE MCK 25mV 0V CP3001 CP3003 5 START EKEY X3551 CSTCV26.00MXJ040 H5V_ M5V_ 38nS CP3004 R3551 1M 1 L661 100uH AAFO 3LO C3702 C3704 C3706 C3707 C3708 C3709 2 8 D3701 DAN222 7 6 8 CP701 R3704 47k 3 R3705 47k C3554 0.01 3R3V 6 7 3 DSFW DSDR DSFR DSKY CTFL RTDT DPGI 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 R3703 47k R3701 47k Q3551 DTA114EE R3558 1k 4 5 R3702 47k DPGI 1k 1k 1k 1k ACC(1) CP667 AMOD FAI_ IC3552 TC7WU04FU L667 100uH CP661 DRES SBSY C3769 0.0047 CBSY L669 HF50ACC322513-B Q3701 DTC114EE CP3006 CP681 7 2 W701 2 Q653 DTC114EE 1 L681 100uH SKYS J681 ESTA C681 0.0047 CRXD VRAC VINT VDTI VCS 4 CP668 C701 100p 6 VRAC VINT VDTI VCS 5 CP662 CP665 3 CP669 C665 0.0047 5 R3726 1k C662 0.0047 4 6 L668 100uH BANV SQSS R3732 47k R3777 15k HWR_ L664 100uH C669 0.0047 11 EALC 7 3 C668 0.0047 12 4 L663 HF50ACC322513-B C667 0.0047 3 MSND SQSS SPS ACC(2) L666 HF50ACC322513-B C661 0.0047 13 L670 100uH C664 0.0047 2 UNSB C3723 0.0047 CSL R3778 47k Q651 DTA114EE TRV UNSB DSFW DSFR ESTA VCS SSTB SPS SQSS SPS R3779 100k CTXD 14 20 OUT EN VCC 19 D0 Q0 18 D1 Q1 17 D2 Q2 16 D3 Q3 15 D4 Q4 14 D5 Q5 13 D6 Q6 12 D7 Q7 11 GND CLK R3725 47k 47k 47k 47k Q3772 2SC4081 1 1 2 3 4 5 6 7 8 9 10 R653 8.2k R3776 33k IC3771 TC7W04FU A9 A10 A11 A12 A13 A14 A15 A16 C3656 0.01 R3775 6.8k C3775 470 C3562 100 A3 A4 A5 A6 A7 A8 IC3656 TC74AC32FT CS2 R3772 R3773 R3774 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 M5V_ CIV Q652 2SD1619 IC3654 TC74AC574FT LRES D8 D9 D10 D11 D12 D13 D14 D15 to DISPLAY board J451 W354 10 6 R3654 1k 5 TRAS J352 SSP SPE C670 0.0047 C3761 C3762 C3763 C3764 C3765 C3766 C3767 C3768 R3769 R3770 R3771 RD SPE CP671 CP663 CP664 CP666 CP670 11 FSTB ANTS BSTB RANS R652 10k 4 (EXT SP) CP351 CP353 C651 0.0047 12 CP354 C3725 0.1 3 J351 CP352 R3722 47k 13 Q691 DTC114EE SSP M5V_ SQLS AFMS MSTB ASTB FSTB ANTS BSTB RANS C3722 0.0047 2 20 OUT EN VCC 19 D0 Q0 18 D1 Q1 17 D2 Q2 16 D3 Q3 15 D4 Q4 14 D5 Q5 13 D6 Q6 12 D7 Q7 11 GND CLK C3721 0.0047 LWR_ 1 2 3 4 5 6 7 8 9 10 R3721 47k 14 LRES D0 D1 D2 D3 D4 D5 D6 D7 C3654 0.01 1 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 HWR_ L644 HF70ACC635050-T CP641 CP642 CP643 CP644 0.0047 0.0047 C641 C642 L643 HF70ACC635050-T R635 4.7k R638 4.7k R636 33k R637 15k C632 0.0047 R632 33k CS1 CS2 CS0 J691 CP692 IC3653 TC74AC574FT IC3655 TC74AC08FS to DSP board MF1 R691 10 SPCH (KEY) CP682 MAIN UNIT 10 - 5 J203 DSPF O G to EXT TUNER Q632 2SC4081 Q631 2SC4081 RDP FAI_ A17 CSL A0 A1 A2 RESET RD_ HWR_ LWR_ WAIT R633 15k SBSY VRAC VINT VDTI TCON EKEY RTDT CTFL C631 0.0047 20 19 18 17 16 15 14 13 12 11 FAI M5V_ MSTB IC3551 SED1354F0A MA7 MA6 MA5 C3552 0.01 VCC G B1 B2 B3 B4 B5 B6 B7 B8 I D691 DAN222 RD DIR1 A1 A2 A3 A4 A5 A6 A7 A8 GND R634 4.7k C3657 0.01 R3786 100k 470 C3513 220k 220k 220k 220k R3653 R3652 R3657 R3658 LWR_ D15 D14 D13 D12 D11 D10 D9 D8 1 2 3 4 5 6 7 8 9 10 ETKY ETST ET14 ETE 220uH 220uH IC215 AN78L08M SENI IC3652 TC74AC245FT HWR_ CS3 R3759 47k D3763 D3762 D3760 47k 47k 47k 0.1 C3773 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 VSS DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 DB8 DB9 DB10 DB11 DB12 DB13 DB14 DB15 VSS IOVDD WAIT GPIOO RESET RD/WR WE1 WE0 RD BS M/R CS AB0 AB1 AB2 LCAS MD7 MD8 MD6 MD9 MD5 MD10 MD4 MD11 MD3 MD12 MD2 MD13 MD1 AB3 AB4 AB5 AB6 AB7 AB8 AB9 AB10 AB11 AB12 AB13 AB14 AB15 AB16 AB17 AB18 AB19 AB20 IOVDD VSS BUSCLK TESTEN SUSPEND CLKI VSS VRTC HRTC DACRS1 DACRS0 DACWR DACPO COREVDD MD14 MD0 MD15 VSS FPFRAME FPLINE LCDPWR DRDY FPSHIFT VSS FPDAT0 FPDAT1 FPDAT2 FPDAT3 FPDAT4 FPDAT5 FPDAT6 FPDAT7 IOVDD DACRD BLANK DACCLK VSS FPDAT8 FPDAT9 FPDAT10 FPDAT11 FPDAT12 FPDAT13 FPDAT14 FPDAT15 VSS 32 31 30 29 28 27 26 25 24 23 100 AMS 1k PHFS 1k P50S 100 MODS 1k FMNS 1k ACKS 1k CALS 1k DSRS D3771 DAN222 Q3771 2SA1576 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 VSS CAS OE NC NC NC A7 A6 A5 VSS C3651 0.01 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 C3751 C3752 C3753 C3754 C3755 C3756 C3757 C3758 D3758 D3757 D3755 D3754 D3753 D3752 D3751 C3772 0.1 D3759 0.1 R3784 100k R3553 100k R3552 100k VCC OW LW RAS A0 A1 A2 A3 A4 VCC RD_ CS0 FAI_ CS3 VDD ENB YA1 B4 YA2 B3 YA3 B2 YA4 B1 ENA A1 YB4 A2 YB3 A3 YB2 A4 YB1 VSS C3774 0.1 R3510 10k MD15 MD14 MD13 MD12 MD11 MD10 MD9 MD8 0.01 13 14 15 16 17 18 19 20 21 22 CS1 C3724 0.0047 Q3505 DTC144EE 44 43 42 41 40 39 38 37 36 35 1 2 3 4 5 6 7 8 9 10 CS2 R3728 47k 4 VSS I/O16 I/O15 I/O14 I/O13 I/O12 I/O11 I/O10 I/O9 NC BSON HWR_ 20 19 18 17 16 15 14 13 12 11 M5V_ M5V_ H5V_ C3553 0.01 NC 5 IC3753 BU4094BCFV FPDAT14 CD VCC I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 NC IC3651 TC74AC244FT LWR_ R3761 R3762 R3763 R3764 R3765 R3766 R3767 R3768 4 5 6 7 14 13 12 11 9 10 FPDAT11 OUT VDD VSS IC3553 LH61665AS-60A 1 2 3 4 5 6 7 8 9 10 R3651 100k 8 FPDAT8 FPDAT9 1 2 3 100 0.01 RAS WE UCAS LCAS COREVDD MA3 MA4 MA2 MA5 MA1 MA6 MA0 MA7 MA10 MA8 MA11 MA9 IOVDD RAS WE UCAS LCAS VSS MD7 MD8 MD6 MD9 MD5 MD10 MD4 MD11 MD3 MD12 MD2 MD13 MD1 MD14 MD0 MD15 R3505 33k C3558 C3556 UCAS WE RAS MA0 MA1 MA2 MA3 MA4 D3506 MA2S111 W3504 VOGV SATV BANV DRIV POCV MIGV AFGV MONV FPDAT0 FPDAT1 FPDAT2 FPDAT3 FPDAT4 FPDAT5 FPDAT6 FPDAT7 HSYNC VSYNC C3509 0.01 IC3502 S-80942ANMP-DD6 0.01 C3557 Q3504 2SA1162 VDD AO10 AO9 AO8 AO7 AO6 AO5 AO4 AO3 VSS 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 MA3 MA4 MA2 MA5 MA1 MA6 MA0 MA7 15k 15k 15k 15k H5V_ TPOUT SOUT CS1 CS0 L5 L4 VDD VCC AO11 AO12 DO LD CLK DI AO1 AO2 GND 10 9 8 7 6 5 4 3 2 1 NBS NBLS MSL1 MSL2 MISL MOSL VOSL AGRS 1k 1k 1k 1k 1k 1k 1k 1k C3655 2p R3557 R3554 R3555 R3556 R3506 4.7k GND WR SIN SCK L1 L2 L3 C3555 MD0 MD1 MD2 MD3 MD4 MD5 MD6 MD7 14 13 12 11 10 9 8 11 12 13 14 15 16 17 18 19 20 RX 0V TX 4.4V L641 L642 LRES Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 QS QS STR D CLK OE R3511 R3512 R3513 R3514 R3515 R3516 R3517 R3518 R3519 R3520 R3521 R3522 R3523 R3524 R3525 R3526 C3512 0.01 C3560 0.01 C3561 0.0047 L3501 HF50ACC322513-B DSKY_ SKYS_ RTKI_ DPGI_ DSDR CBSY PWRK_ MR FZRS FPDAT11 FPDAT5 FPDAT4 FPDAT3 HV FPDAT9 FPDAT2 FPDAT1 FPDAT0 R3783 47k PWRK FPDAT14 FPDAT8 FPDAT7 FPDAT6 L3604 RCR-875D-472K IC3504 RTC-4553A 1 2 3 4 5 6 7 C3771 R3741 270 R3781 47k C3503 0.01 C3511 0.01 R3782 47k ASTB MCK MDAT IC3751 M62352GP DRES WAIT X3501 CR-520 FZVP CON0 CON1 CON2 PSEL PSTB UNLC_ DRES_ ISTA_ TXS_ RXS_ IKEY_ FAI LRXO LTXO LRES BSON WAIT LWR HWR RD TMD 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 P53/ADTRG P52/SCK2 VSS VSS P51/RXD2 P50/TXD2 PF0/BREQ PF1/BACK PF2/LCAS/WAIT PF3/LWR PF4/HWR PF5/RD PF6/AS VCC PF7/FAI VSS EXTAL XTAL VCC STBY NMI RES WDTOVF FWE P20/PO0/TIOCA3 P21/PO1/TIOCB3 P22/PO2/TIOCC3 P23/PO3/TIOCD3 P24/PO4/TIOCA4 P25/PO5/TIOCB4 P26/PO6/TIOCA5 P27/PO7/TIOCB5 P63/TEND1 P62/DREQ1 P61/TEND0/CS5 VSS VSS P60/DREQ0/CS4 VSS C3504 0.01 PG3/CS1 PG4/CS0 VSS NC VCC PC0/A0 PC1/A1 PC2/A2 PC3/A3 VSS PC4/A4 PC5/A5 PC6/A6 PC7/A7 PB0/A8 PB1/A9 PB2/A10 PB3/A11 VSS PB4/A12 PB5/A13 PB6/A14 PB7/A15 PA0/A16 PA1/A17 PA2/A18 PA3/A19 VSS PA4/A20/IRQ4 PA5/A21/IRQ5 PA6/A22/IRQ6 PA7/A23/IRQ7 P67/CS7/IRQ3 P66/CS6/IRQ2 VSS VSS P65/IRQ1 P64/IRQ0 39k 20k 10k 10k 10k VSS WP SO CS ECS IDTI CCS CWR D3507 DA221 C3643 0.0047 R3592 R3593 R3594 R3595 R3596 SI SCK HOLD VCC 4 3 2 1 R3751 R3752 R3753 R3754 R3755 R3756 R3757 R3758 16 1 2 3 15 VSYNC HSYNC HSYNC VSYNC 39k 20k 10k 10k 10k 39k 20k 10k 10k 10k 5 6 7 8 IDTO ICK R3509 4.7k R3581 680 G R3572 R3573 R3574 R3575 R3576 R3582 R3583 R3584 R3585 R3586 M5V_ SKYS RTKI IC3503 X25320SI-2.7 4 5 6 7 14 13 12 11 9 10 ASTB MEASUREMENTCONDITIONS VOLTMETER :50kΩ/VDC OSCILLOSCOPE :20MHz DISPLAY :14.1MHz USB 8V H5V_ D3505 MA2S111 3R3V_d B C3642 0.0047 R3646 47k R3012 270k R3033 100k R3644 1k R3591 680 3R3V_d R3645 47k R3643 1k HV R 8V VOGV -5V MICO 3R3V_d R3648 47k Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 QS QS IC3752 BU4094BCFV to MEMORY board J2 BLBV BLAV R3503 47k M5V_ C3510 10 C3017 10 R3035 1k R3007 470 7 8 C3031 0.1 VCC VCAOUT CTL VCAIN NC 220k 220k 220k 220k 220k 220k STR D CLK OE 8 D3 D2 D1 D0 8V_ H5V_ D3504 MA2S111 C3020 10 R3034 1.2k VCC2 IN+ INOUT GND 10 9 8 7 6 D11 D10 D9 D8 D7 D6 D5 D4 M5V_ BT3501 CR2032 4 ASL D3509 1SS372 R3647 1k R3571 680 1 2 3 4 5 R3011 82k Z IC3003 M5282FP R3020 47k 15 C3016 10 MISL MICE Y 14 R3010 22k AMPO X XO X1 Y0 Y1 Z0 Z1 INH A B C R3036 100 R3005 1K 12 13 2 1 5 3 6 11 10 9 SKYS RTKI C3019 10 C3018 10 R3740 150 MDAT MCK MR C3631 0.0047 C3641 0.0047 R3006 470 MICI C3030 0.1 R3549 R3548 R3547 R3546 R3545 R3544 C3508 0.1 PWRK 16 R3622 D3508 1SS372 ALCL R3021 220 D15 D14 D13 D12 1 2 3 15 CS0 CS3 to MEMORY board J1 8V D8 D9 D10 D11 D12 D13 D14 D15 D7 D6 D5 D4 D3 D2 D1 D0 RESET BYTE VCC VCC MDAT MCK FZRX CRXD FZTX CTXD 16 HWR RD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 ALCL SML 4.7k 4.7k A0 A1 A2 A3 SML R3650 R3649 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k 220k A12 A13 A14 A15 A16 A17 A18 16 15 14 13 12 11 10 9 0.0047 0.0047 0.0047 0.0047 0.0047 0.0047 VDD Y X X1 X0 A B C R3543 R3542 R3541 R3540 R3539 R3538 R3537 R3536 R3535 R3534 R3533 R3532 R3531 R3508 47k FMTL Y1 Y0 Z1 Z Z0 INH VEE VSS 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 A18 A17 A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 FRMD C3507 0.01 C3032 0.1 1 2 3 4 5 6 7 8 IC3501 HD64F2357F20 P35/SCK1 P34/SCK0 P33/RXD1 P32/RXD0 P31/TXD1 P30/TXD0 VCC PD7/D15 PD6/D14 PD5/D13 PD4/D12 VSS PD3/D11 PD2/D10 PD1/D9 PD0/D8 PE7/D7 PE6/D6 PE5/D5 PE4/D4 VSS PE3/D3 PE2/D2 PE1/D1 PE0/D0 VCC CS1 CS0 R3501 47k C3505 0.01 SCPL VOXL AVXL ASO0 ASO1_ ASO2_ ASL C3614 0.0047 1k 1k 1k 1k 1k 1k 47k 47k 47k 47k 47k 47k R3030 100k R3032 100k R3017 2.2k R3042 2.2k FORL NSQ0 REFL TRVI_ PWRS 1k C321 0.0047 R324 120k C324 0.001 R3655 47k D3602 1SS372 R3620 47k R3637 R3638 R3639 R3640 R3641 R3642 0.1 IC3631 BU4053BCFV 4 C3025 10 C3638 R3656 47k SCPL VOXL AVXL R3621 47k C3615 0.0047 4 C3506 0.0047 1 + - R3014 8.2k C3012 0.047 R3016 100k 8 Z 15 SENI TRAS RECO IC3002 BU40538CFV FZMD TRAS CS3 CS2 R3507 47k 3 2 C3015 10 IC3004A NJM4558M R3626 1k C3601 0.1 R3015 120k R3013 10k STON_ R3631 R3632 R3633 R3634 R3635 R3636 W3014 D3001 DA221 R3037 10k R3019 220 Y 14 7 8 VDTI M5V C322 0.0047 R322 120k SENI PWRS_ CCS CWR ECS IDTI IDTO ICK AVCC VREF P40/AN0 P41/AN1 P42/AN2 P43/AN3 P44/AN4 P45/AN5 P46/AN6/DA0 P47/AN7/DA1 AVSS VSS P17/PO15/TIOCB2 P16/PO14/TIOCA2 P15/PO13/TIOCB1 P14/PO12/TIOCA1 P13/PO11/TIOCD0 P12/PO10/TIOCC0 P11/PO9/TIOCB0 P10/PO8/TIOCA0 MD0 MD1 MD2 PG0/CAS PG1/CS3 PG2/CS2 C3632 C3633 C3634 C3635 C3636 C3637 C3004 1 X XO X1 Y0 Y1 Z0 Z1 INH A B C R3022 470 12 13 2 1 5 3 6 11 10 9 C3021 0.1 28 27 26 25 24 23 22 21 20 19 18 17 16 15 C3003 0.1 C3001 1 C3008 4.7 16 SCLK VCCD XCLK INT RAC VSSA NC NC NC NC VCCA ANAIN+ ANAINNC SS MOSI MISO VSDD NC NC NC NC NC NC VSSA VSSA AUDOUT AMCAP R3018 47k 7 SCPL VOXL AVXL ASO0_ ASO1_ ASO2_ STON_ BEEP_ 8V C3005 0.1 C3013 0.1 W3001 IC3004B NJM4558M R323 120k 2 3 + C325 0.1 -5V FZMD R3023 470 R3004 47k R3003 47k 6 5 8 1 C3626 0.0047 C326 0.1 R3041 47k R3040 47k R3028 82k R3027 82k IC3001 ISD33120S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 MAIN(1) R3026 1.5M IC321A NJM4558M 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 BEEP_ C323 0.001 4 R3025 10k VX2 C3612 0.0047 C3611 0.0047 C3006 0.1 C3009 22 C3011 470 C3010 470 R3024 100k 1k STON VCS MDAT VX1 R3625 8V IC3005 BU4053BCFV C3605 0.1 RXS_ TXS_ 2.45mS MCK C3604 470 1k 1k 0V DTAF VRAC VINT RECI R3610 47k LRXD LTXD ISTA IKEY_ TRVI_ A4 A5 A6 A7 A8 A9 A10 A11 R3617 R3618 BEEP R3607 47k TMD 47k 0.0047 1k 1k 1k 1k 1k R3623 C3624 2.2k R3604 R3605 R3608 R3609 R3612 C3603 0.1 R3603 LFMD LMFD ISTA IKEY TRVI Q3002 DTA114EE 800mV W3010 C3502 12p J3504 J3503 H5V TMD RXS TXS R3502 47k R3627 1M CW KEY DOWN SIDE TONE LIMIT:OFF C3501 12p R3628 1M 10uH 100uH R3606 47k L3601 HF50ACC322513-B R3785 47k UNLC_ C3625 0.0047 L3001 L3002 47k FZRS C3607 0.001 Z1 R3602 C3602 100 RX 0V TX 4.4V 1k R3611 47k R603 10k R3601 C3609 0.01 R602 1k D3601 MA2S111 R3616 22k R601 4.7 Q602 2SC4081 14V MOSL VOSL 3R3V M5V_ RX 6.5V TX 0V C3608 0.01 RX 0V TX 4.4V R613 10k 8V J641 KEY START DRES_ R3615 22k 7.8V TRV ON 0V TRV OFF 4.8V R612 1k C611 0.47 R621 47k 1 D601 DA221 C601 0.47 Q612 2SC4081 2 6 8V H5V M5V_ M5V_ R3613 47k Q601 2SD1619 R611 4.7 D611 DA221 R622 1.5k 8V FZVP UNLC CON0 CON1 CON2 PSTB PSEL H5V 3 5 14V RXS L3603 RCR-875D-472K C3606 220p 4 -5V HV Q611 2SD1619 RX 0V TX 8.0V Q621 2SA1577 L3602 HF50ACC322513-B C3610 0.01 Q622 UMH11N -5V HV M5V M5V 14V RXS FZRS TXS PAT8 TRVI R623 10k -5V HV 3R3V TRV OFF TX 8.0V EXCEPT 0V M5V M5V 14V RXS R631 4.7k RXS M5V R8V M5V R8V M5V R651 330 14V RXS H5V 8V 14V T8V H5V 8V RTKI M5V BUS LINE 14V T8V H5V 8V