Kenwood TK-863G Service Manual

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24TK-863GSEMICONDUCTOR DATA / DESCRIPTION OF COMPONENTSShift Register : BU4094BCFV Terminal function (TX-RX unit IC510)Pin No. Port Name Function4 Q1 W/N Wide/Narrow SW. Narrow : H5 Q2 MUTE MIC mute (M models only). Mute : H6 Q3 MBL MIC/LCD backlight control.Backlight on : H7 Q4 LED0 Red LED. LED lights : H11 Q8 BSHIFT Beat shift. Shift on : H12 Q7 AFREG2 Base band IC inter register select 2.13 Q6 AFREG1 Base band IC inter register select 1.14 Q5 LED1 Green LED. LED lights : H Terminal function (TX-RX unit IC9)Pin No. Port Name Function4 Q1 HNC Horn alert control. Horn alert on : H5 Q2 8RC 8R control. RX : H6 Q3 8TC 8T control. TX : H7 Q4 SPMUTE Speaker mute control. Mute on : H11 Q8 AUX6 Auxiliary output.12 Q7 AUX513 Q6 PA/LI PA/LIGHT control. PA/LIGHT on : H14 Q5 RX TX/RX VCO switch. RX : LDESCRIPTION OF COMPONENTSDisplay Unit (X54-3270-10)Ref. No. Use/Function Operation/ConditionD801 Reverse currentpreventionD802~805 Light emissionD808 Current stabilityIC801 LCD driverQ801 DC switch (LED)TX-RX Unit (X57-6490-10)Ref. No. Use/Function Operation/ConditionD1 Surge absorptionD2 Voltage referenceD3~5 Surge absorptionD8 IF switch (Wide/Narrow)D9 DC switchD10 IF switch (Wide/Narrow)D11 Noise amp detectD14 Surge absorptionD15 OR gate SP mute, AMD16 RF switch (TX/RX) HeterodyneD17 Temperature DrivecompensationD18 RF BPF tuningD19 Surge absorptionD20 Reverse currentpreventionD21 Voltage referenceD23 RF BPF tuningD24 Voltage referenceD25 Surge absorptionD26 Reverse currentpreventionD27 Reverse currentpreventionD28 RF BPF tuningD30 ANT switchD31 RF BPF tuning