Kenwood TK-260G Service Manual

Also see for TK-260G: Instruction manual Instruction manual Service manual Service manual Service manual

Contents

TK-260G/270G23IC1 IC RF Power ModuleIC2 IC PLL systemIC3 IC Comparator (APC)IC4 IC FM IF systemIC5,6 IC Shift register / Output expanderIC7 IC Voltage regulator / 5VIC8 IC Voltage detector / ResetIC9 IC Voltage detector / INTIC10 IC EEPROMIC11 IC AF Power amplifierIC12 IC Flash memoryIC13 IC MicroprocessorIC14 IC Audio processorIC15(1/2) IC 2Tone amplifierIC15(2/2) IC AF Pre amplifierIC16(1/2) IC Bias bufferIC16(2/2) IC AF Buffer amplifierIC17 IC D/A converter (TX AF adjustment)IC18 IC DTMF decoderIC19 IC Active filter / For LSD inIC301 IC VCO 1/2 dividerQ1 Transistor PLL IC fin amplifierQ2 Transistor VCO oscillation (TX)Q3 Transistor RF Buffer amplifierQ4 Transistor RF amplifierQ6 Transistor RF amplifier / TX driverQ7 FET DC switchQ8,Q9 Transistor DC switchQ10 FET VCO oscillation (RX)Q11 Transistor Ripple filterQ12 Transistor TriplerQ13 Transistor DC switchQ14 Transistor 2nd IF W/N switch sets to on when NarrowQ15 Transistor DC switchQ16 Transistor DC switch / 5RQ17 Transistor 2nd IF W/N switch sets to on when WideQ18 Transistor DC switch / 5T, SaveQ19 FET MixerQ20,Q21 Transistor DC switch / 5T, SaveQ22 Transistor IF amplifierDISPLAY UNIT (X54-3250-10) (TK-270G Only)Q23 Transistor DC switch / W/N audio amplitude adjustQ24 Transistor DC switch / LED (Red)Q25 Transistor DC Switch / LED (Green)Q26 Transistor DC switch / SquelchQ27 FET DC switch / 5T, SaveQ28 Transistor DC switch / 5MQ30 FET SP Mute switchQ31 Transistor Clock frequency shiftQ32~34 Transistor DC switch / SP MuteQ35(1/2) FET Mute switch / MIC line muteQ35(2/2) FET DC switchQ36 FET Mute switchQ301 FET RF amplifierD1 Diode Unlock detectD2 Variable Frequency controlcapacitance diodeD3 Diode ANT switchD4 Variable Frequency controlcapacitance diodeD5 Diode TX/RX switchD6 Variable TX modulationcapacitance diodeD7 Diode ANT switchD8 Zener Diode Overload protectionD9 Variable Frequency controlcapacitance diodeD10 Diode ANT switchD11 Variable Frequency controlcapacitance diodeD12 Diode Current steeringD13,14 Diode RF switch (2 nd IF wide/narrow)D15 Diode Reverse protectionD17 Diode Model checkD18 LED LED/ Red, GreenD19 Diode Model checkD21 Diode Voltage dropD22 Diode Reverse protectionD23 Diode Voltage clampD302,303,305 Variable Rf BPF turnigcapacitance diodeIC501 IC LCD driverQ501 Transistor Current driver / LCD back light LED AVRQ502 Transistor DC switchD505 Diode Speed upD506 LED LCD back lightD507 Diode Voltage referenceD508~510 LED LED /Key pad back lightD511 LED LCD back lightD512~516 LED LED /Key pad back lightRef. No. Use/Function Operation/ConditionRef. No. Use/Function Operation/ConditionTX-RX UNIT (X57-587X-XX)Ref. No. Use/Function Operation/ConditionDESCRIPTION OF COMPONENTS