Kenwood NX-420 K Service Manual

Contents

67SCHEMATIC DIAGRAM NX-420X54-376 (A/3) 2/2, X54-376 (B/3) 1/1JIHGFDC-tSDO0SCK0/EVCSMODMICDISP_VERMICISPAFTV1TV2ASQTV2TV1MICISPAFMICASQAPCSDO0SDI0SCK0ASQAPCASQ/LCDCS/EVCSMOD50CRXAF_2SQ_SWVCO_MODVREFVREF33A33A33A33A33MSB2L1✽R86✽R84L2R34100kR5022kR35100kC741uR45 100k R44100kC49 1000pC701uC54330pR33100kC5868pC45R531.8kIC6TC75W51FK(F)1234oUTAVSS 567oUTB8VDDC48 1uC671000pC680.01uR300C23C34 47pC7R52470C26 47pC31 47pC28 47pC29C33C42C44 47pC43S2S70-0516-05S3S70-0516-05S4S70-0516-05CP1100x4CN6123456R230R240C350.1uR290R280C470.1uC40 47pC36 47pIC4R2A20178NP1VIN22VDD3LD4CLK5DI6VIN37 VoUT38 VoUT49 VIN410VIN511VoUT512VoUT613VIN614 VDAREF115 VDAREF216 RESET17 GND18 VIN719VoUT720VoUT821VIN822VIN123VoUT124VoUT2R1839kC161000pC13100pTH1C190.1u C210.01uIC1TC75W51FK(F)ASQ BPF1234oUTAIN-AIN+AVSS 5IN+B6IN-B7oUTB8VDDR17 100kR19220kR933kC220.22uR482kR210kR153.3kC25C50.1uC10100pC201000pR14330kD2KDR731R815kC2680pKTC4075E(Y,GR)Q3R11330kR13470C327pC61000pR20220kC8S1S70-0516-05C11680pSSM3K15TE(F)Q2R12330kC301uR2156kC321200pR2256k C38180pR2668kR1647R100IC2TC75W51FK(F)1234oUTAIN-AIN+AVSS 5IN+B6IN-B7oUTB8VDDC390.1uCN5123456789101112131415161718192021222324R37150kC62100pC710.1uR4722kR786.8kR7710kR7956kC921000pR81 0C73 10u✽R82R880C520.1u2SC4738(GR)FQ4R4010kD3DA221R4168kC530.1u D4DA221R3910kC631uC641uR4268k2SA1832(GR)FQ5PTT Side 2Side 1GND+-+ -PTT/S1/S2/EMGGNDAUX(0V-1.65V)(0V-3.3V)X54-3760-XX-10 NO-12 3.3k47p47p47p47p47p47p47p0.22u1000pSB2LEDGLEDR33M33A33MD/A CONVAGC DETD3,4MIC AGCQ4,5VCO MOD/VREFAF LPF/MIC AMPSQL NOISE AMPBW SWNOISE DET50C50C50C33AC150.01uC374700pPTT SECTION(X54-3760-XX)(B/3)TX-RX UNIT(X57-8370-XX)CN604TX-RX UNIT (X57-8370-XX) CN6001NOR84 R8600NOR82100kK3KDISP_VER5.00VR:7.47VT:7.25V3.30V3.30VDISPLAY UNIT (X54-3760-XX) (A/3)