Kenwood TH-F6A Service Manual

Also see for TH-F6A: Instruction manual Instruction manual Supplemental service manual Service manual Quick reference

Contents

TH-F6A/F7E15DESCRIPTION OF COMPONENTSRef. No. DESCRIPTION NAME Use/function Ref. No. DESCRIPTION NAME Use/functionD115 RF SWD116 ATT SW B band 50 to 108MHz ON:receiveATT onD117,118 ANT SWD119 ANT SW Q57 control SWD120 ANT SW Q55 control SWD121 reverse current protectorD122 voltage shiftD123 overvoltage protectorD124,125 overinput protectorD126 voltage shiftD702-704 Type setting diodeD705 AF rectificationD706-708 reverse current protectorD709 AF rectificationD710,711 overvoltage protectorD712-717 LEDD718 AGC SWD719 reverse current protectorD720-725 LEDD726 constant-voltage circuitD727 reverse current protectorD730-732 reverse current protectorQ1 constant-current circuit constant current chargeQ2 Charge controlQ3 Charge control constant potential chargeQ4 SW B band/transmission PLL chargepump SWQ5 Charge controlQ6 SW B band/transmission PLL VCO shiftSWQ7 RIPPLE FILTER B band/transmission VCO powersupplyQ8 SW Prescaler divider SWQ9 OSCILLATOR B band /transmission VCOQ10 VCO power supply SWQ11 RF AMPQ12 RF AMPQ13 BUFFER AMPQ14 Power supply switch Prescaler power supply SWQ15 SW Prescaler divider SWQ17 SW Prescaler divider SWQ19 RF SW B band local ampQ21 RF AMP B band local ampQ22 AF SW B band AF output SWQ23 3rd local AMP 3rd local (crystal oscillator) bufferampQ24 IF AMP B band W-FMQ25 AGC AMP B band IF AGC DC ampQ26 BUFFER AMP B band IF AGC amp (57.6MHz)Q27 local AMP B band 2nd local (crystal oscillator)buffer ampQ28 MIXER B bandQ29 AF SW B band AF output SWQ30 SW B band FM / W-FM power supply SWQ31 RIPPLE FILTER A band VCO power supplyQ32 ANT SW Bar antenna switchQ34 OSCILLATOR A band VCO oscillatorQ35 VCO power supply SW A band RX VCO power supplyswitchingQ37 BUFFER AMP A band RX VCO output ampQ40 RF AMP A band local ampQ41 RF AMP A band mixer input ampQ43 IF AMP A band 1st IF ampQ44 RF AMP A band 2nd local multiplyngQ45 MIXER A bandQ46 RF AMP B band 1.2GHz band 1st ampQ47 APC SW APC controlQ48 ANT SW Bar antenna switchQ49 APC controller APC controlQ50 AMP APC controlQ51 APC SW APC controlQ52 ANT SW Bar antenna switchQ53 DC SW Bias controlQ54 RF AMP Pre-driveQ55 RF AMP VHF/UHF final-ampQ56 RF AMP Drive ampQ57 RF AMP 220MHz band final-amp (K-typeonly)Q58 Power supply switch B band 2nd amp power supplycontrolQ59 RF AMP Bar antenna 1st ampQ62 RF AMP UHF 1st amp (A/B band)Q63 RF AMP A band VHF 1st ampQ64 RF AMP B band VHF 1st ampQ65 DC IN DETECT SW DC-IN / batteryQ66 APC SW APC controlQ68 SW BPF SWQ69 VCO switching VCO oscillator frequency shift SWQ70 VCO switching VCO oscillator frequency shift SWQ71 RF AMP Drive ampQ72 RF AMP Pre-ampQ73 BAND SW B band 50 to 108MHz On when RXQ74 BAND SW B band 50 or less On when RXQ76 RF AMP B band 50 to 108MHz On when RXQ92 Power supply switch B band 1.2GHz band 1st amppower supply SWQ93 RF AMP B band local ampQ94 RF SW PLL Fin filter SWQ95,96 SW Final SWQ97 RF AMP B band local ampQ98 GAIN SW Bar antenna RF amp gain SWQ99 DC SW Bias controlQ100 IF SW when bar antenna use : ON