Kenwood TH-F6A Service Manual

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Contents

TH-F6A/F7E14DESCRIPTION OF COMPONENTSl (X14-6750-00)Ref. No. DESCRIPTION NAME Use/functionIC1 Charge ICIC2 PLL IC B band RX TXIC3 PRESCALER divided into 1/2, 1/4, and 1/8IC4 Mixer for SSB detectionIC5 FM/AM IC 2nd mix, quadrature detection, AFoutput, noise amp output, S-meterIC6 PLL IC for A band receiverIC7 FM IC 2nd mix, quadrature detection, AFoutput, noise amp output, S-meterIC8 APC Control Transmission APC control OP-AMPIC9 APC Control Transmission APC control OP-AMPIC10 Wide band AMP B band receiver 2nd ampIC11 Shift register Shift register (ATT, power supply,ANT SW, )IC701 MIC&DTMF AMP Limiter amp, splatter filterIC702 MIC AMPIC703 AMP for packetIC704 E2PROMIC705 CPU for J, K, E typeIC706 Electronic VRIC707 AF AMPIC708 4.0 regulatorIC709 RESET ICIC710 3.5V DetectorIC711 TONE FILTER CTCSS, ADCSIC712 TONE DETECTORIC713 DC · DC converterIC714 APC circuit TransmitterIC715 3.0 regulator LCD booster CircuitIC717 Rx AF AMPIC718 BPF Voltage adjust B band RX TXIC719 TONE&96H AMPIC720 AF AMPD1 voltage shift Power supply voltage shiftD2 reverse current protector reverse current protectorD4 LimiterD5 Charge IC reverse current protectorD6 reverse current protector reverse current protectorD7 voltage shift voltage shiftD8 PLL Lock voltage detect SW B band RX TXD9 DC SW Speed up SWD10-12 VCO VCOD16 VCO VCOD18 VCO VCO shift SWD20 Tuning SSB/CW 3rd LO oscillation frequencytuningD21 VCO VCO shift SWD24 Tuning SSB/CW 3rd LO oscillation frequencytuningD25 RF SW FM/W-FM SWD28 Tuning A band local filter tuningD29 Tuning 2rd LO oscillation frequency tuningRef. No. DESCRIPTION NAME Use/functionD32 ATT B band RF AGC ATTD33 PLL Lock voltage detect SW A band PLL IC power supply voltageshiftD34-37 VCO VCOD38 DC SW Speed up SWD40 RF SW VCO shift SWD41 RF SW A band VCO output SWD44 reverse current protectorD45 Limiter voltage limiterD49 ANT SWD51-54 ANT SWD57 RF SW Bar antenna RF receve line SWD58 POWER SW B band 2nd wide band amp powersupply SWD59 RF AMP SWD60 Tuning Bar antenna frequency tuningD62 ANT SWD63 reverse current protectorD65 RF SW B band RF receive line SW 600 to1300MHzD67 RF SW A band 265 to 680MHzD68 RF SW B band 265 to 680MHzD69 UHF RF AMP SW UHF 1st amp controlD70 ANT SWD71 RF SW A band VHF ( 220MHz K type only )D72 Tuning A band VHF BPF tuningD73 ANT SWD74 RF SW 220MHz band BPF tuningD75-77 Tuning A band VHF BPF tuningD78 RF SW B band 108 to 265MHzD80 RF SW B band 50 to 108MHzD81 Tuning A band VHF BPF tuningD82 ANT SWD83 Tuning A band VHF BPF tuningD85 ANT SWD87-90 Tuning B band VHF BPF tuningD91 RF SW B band 0.1 to 50MHzD93 ANT SW B band 50 to 105MHzD94 ANT SW B band 0.1 to 50MHzD95-97 BPF tuning B band 50 to 108MHz receive BPFtuningD99 RF SW B band local 650 to 1.3GHzD100 RF SW B band local 325 to 650MHzD101 RF SW B band local 0.1 to 325MHzD102 RF SW Transmission drive input SWD103 SW Matching SWD104 ANT SWD106 Tuning A band local filter tuningD107-110 RF SW B band PLL IC Fin filter SWD112,113 ANT SW Receiver circuit protector SW(ON:transmission)D114 ANT SW Transmission band SW