Kenwood TM-271A Service Manual

Also see for TM-271A: Instruction manual Instruction manual Service manual

Contents

SCHEMATIC DIAGRAM TM-271A/271E35JIHGFX57-685 2/335C4611000pC3771000pR118 0C5111000pR322100R3014.7k2SC3357Q502R37139kL50427nC5141000pR1031kL421100nC3014.7u6.3C3761000pC5021000pR353100kR3240C458220pC2681uC3611000pR10147kR376100kC3191000pR50922C312 0.1uR5140L304330nC4671000pC51527pD409 DAN235E8TC46522pC3721000pC3630.01uR2681kR359220kR31910kC4562pC5071000pC4591000pC3240.01uC3660.1uC3871000pR360470kR3514708R69R106 1kC3140.01u34L302330nCNVSSD303DAN222R366470R43822kC311 0.1uC3641000pR37056C5041000pR5101.5kL50168nC3842p5MC4631000pC1511800p5MR315 18kC519 82pC3831000pR3690R4441kC1011000pR1091.5kIC66AT24C64A10SI18or CAT24WC64JI1 A02 A13 A24 GND 5678R442100IC402UPB1509GV1234 5678 R5160C1040.1uR3561k5MR31710k5MR105 1kL303330n8RR504270C3712pR1111kR10247kR51147C5051000pR4371kR32533kC5131000pR50318C3581000pL101C32256pC46018pC5121000p5CL301L34-4554-058C8CR8147k5CR1230C3781000pD502DA221C3021000pR7047k71R1041kL420150nR32122kC35133pR502270R820R314 2.2kC516820pL352560nC3260.01uC50915pD5011SS355C3791000pR15110kC518 33pR5132.2kC466100pC31315u6.3C66 1000pL50327n70C323270pR512108RC5108pR3640R25012kR5052.2k8RC2670.47uC4641000p5M5MC3601000pC3570.01uR1524.7kD302DAN222C46210pR37347kL42256nC3160.1uC2500.1uC3751000pC830.1uC468220pC3150.1uL50268nC380100pL419100nR11047kR4432.2kR4411008RC4571000pC5011000pR352100R362470kC5061000pR31622kC821000pC3621000pR354330R24915kC503100pC517 3pC3701000pR31810kR5011kC3598pR43947kR365100kC1523900pR368100kR50610kL351820nR323120kR507102SC4649(N,P)Q4112SC3357Q501C1020.1uR3024.7kR32010kR26939kC3170.1uR375100kC3530.01uR440100175MC3180.1uTONEDTMFPLLENCNCGNDCNVSSEVLLDBSHIFTRESETXOUTVSSXINVCCGNDNCPOWERINTNCTX/RXULNCNCEEPSDTEEPCK 262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576P1MT77MICMT78 NC79 8RC80 8TC81 NC82 SBC83 NC84 NC85 NC86 CM87 MICKEY288 MICKEY89 VOL90 TEMP291 TEMP192 RSSI93 SQIN94 AVSS95 DTMF IN96 VREF97 AVCC98 NCNCNC7473R12447kR921kR911k87R12747k88892SC2412KQ302C32168pC4741000pSQCPKSPR15M68R12547kR119*R120*R122 0R121*R246150kR247120kR2485.6KC2494.7u6.32SC5488Q351R355470C35518pC3544.5pC3563pR358220R361180C367150pR363330kC3693pL35450nL35550nD351HVC376BC36827pR367100C3736pC37427pD352HVC376B3SK318Q352G1DSG23SK318Q353G1DSG2R37247kR37427kL35650nC38227pC38636pL35735.5nD353HVC376BD354HVC376BC47110pC1281000p R12647kL423R11447k5MC3858pC3814.5p2SK3019Q2522SK3019Q2538TC(CPU80)FM DEMODULATIONTPTEMPERATURECOMPENSATIONTEMPERATURECOMPENSATION5MWIDE(CPU65)TXDRXDRF SWITCHNARROWNARROW(CPU64)D351,352IF SWITCHRF BPF TUNINGD353,354IF AMP50,4MHzD5018R 8RIF SWITCHW/NI(EVOL1)EEPROMRF AMPCPUAFVAF MUTEAF MUTEAFI(EVOL12)DIVIDER(HETERO)AFM(CPU50)WIDERF AMP/DRIVE STAGEBUFFER AMPRF BPF TUNINGMIXER RF AMP8RC(CPU76)8TC(CPU80)AMPSW(CPU52)SPM(CPU51)BRI8RC(CPU76)VOLO(EVOL11)W/NO(EVOL2)MICPC/TVRF AMP/DRIVE STAGECMMICKEYVOLTVTX/RX (CPU20)QT/DQT(CPU1)EVLLD(CPU8)TX DTMFUL(CPU21)PLLE(CPU3)XOUT(CPU11)XIN(CPU13)POWERM1MT(CPU76)P9MT(CPU75)MICMT(CPU77)CK(CPU54)DT(CPU53)W/NO(EVOL2)PC/TVW/NI(EVOL1)MICVOLI(EVOL12)VOLO(EVOL11)BRISQIN(CPU93)RSSI(CPU92)SBC(CPU82)1/2VccDTMF IN(CPU95)BSHIFTIC10130622MAA-B85GPNCSQCPKSCLKFLSBSYFLSTXDRXDPTTNCNCNCEMPFLSNCNCNCNCCEFLSNCNCNCNCNCAFMEEPWPNCSPMAMPSWDTCKNCDST1DST2DST3DST4VCCNCVSSADJNARROWWIDENCNCCLCEDO(to LCD)DI(from LCD)NCENCBENCAP9MT9910012345678910111213141516171819202122232425SPM(CPU51)AMPSW(CPU52)W/NI(EVOL1)VOLI(EVOL12)SW1SW2OUTVCC2VCC1ININGNDSDASCLWPVCCSQIN(CPU93)SBC(CPU82)RESET(CPU10)INT(CPU18)1/2VccDTMF IN(CPU95)RSSI(CPU92)IC301TK14489VSCANSCANSQLINFLAMPORFINGNDHy_CFLAMPIRSSIAFOVCCIF_INDEC1DEC2PH_SQUCOOSC(B)OSC(E)NCMIX_O12345678910 11121314151617181920XF35149.95MHzL71-0620-05CF301L72-0993-05CF302L72-0999-05R:3.22VR:4.65VR:4.27VR:0.66VT:0.48VN:5VW:0VT:1.23VR:2.46VR:4.98VR:7.99VR:7.42VR:4.84VT:5.73V4.98VR:0.75VR:0.56VR:4.7mV(SQ OFF)4.97V(SQ ON)R:1.44VR:6.34VR:6.64VN:0VW:5VT:1.26VT:6.8VT:0.88VT:7.82VR:1.23VR:5VR:2.7VR:7.84VT:5.61VR:2.88VR:5.86VR:3.16VTX-RX UNIT (X57-685X-XX)