Kenwood TKR-850 Service Manual

Also see for TKR-850: Brochure & specs Function reference Instruction manual Instruction manual Programming reference

27TKR-850TX-RX Unit (X57-6270-XX)Ref No. Part name DescriptionIC1,2 IC Buffer amplifierIC3~5 IC Voltage regulatorIC6 IC D/A converterIC7 IC Shift registerIC9 IC FM IF systemIC10,11 IC Voltage regulatorIC600 IC EEPROMIC601 IC Voltage detectorIC602 IC Shift registerIC603 IC Bus transceiverIC604 MPU CPUIC605 IC MultiplexerIC606 IC Bus transceiverIC607,608 IC AF amplifierIC609 IC Flash ROMIC610,611 IC AF amplifierIC612 IC InverterIC613 IC CounterIC614 IC CODECIC615 IC D/A converterIC616,617 IC AF amplifierIC618 MPU DSPIC619 IC AF amplifierIC620 IC RS-232C transceiverIC621 IC NAND gateIC622 IC MultiplexerIC623 IC Shift registerIC624~628 IC Voltage regulatorIC629 IC Audio amplifierIC630 IC Voltage regulatorQ1~3 Transistor RF amplifierQ4 Transistor Wide/Narrow switchQ5,6 Transistor DC switchQ7 Transistor Noise amplifierQ8,9 Transistor RF amplifierQ10 Transistor Current controlQ11 Transistor RF amplifierQ12~15 Transistor Ripple filterQ16~19 Transistor DC switchQ20 Transistor InverterQ23~25 Transistor DC switchQ26 Transistor Wide/Narrow switchQ600 FET DC switchRef No. Part name DescriptionQ601 Transistor DC switchQ602 FET DC switchQ603 Transistor InverterQ604 FET DC switchQ605 Transistor InverterQ606 Transistor AF mute switchQ609 Transistor DC switchQ610 FET DC switchQ611 Transistor DC switchD1~4 Diode Wide/Narrow switchD5 Diode Noise detectionD7 Diode DC switchD8 Diode TX switchD9 Diode Surge protectorD11 Zener diode Surge protectorD12 Zener diode Voltage referenceD13 Diode Noise detectionD600 Diode Surge protectorD601 Diode Voltage reductionD606~625 Diode Surge protectorD626 Varistor Current protectorD627,628 Diode reverse current protectorD629 Diode Surge protectorRX PLL/VCO Unit (X58-4800-XX)Ref No. Part name DescriptionIC300 IC PLLQ300,301 Transistor Active filterQ302 Transistor Buffer amplifierQ350,351 FET VCO OSCQ352~354 Transistor DC switchQ355 Transistor Buffer amplifierD350~353 Varicap Frequency controlTX PLL/VCO Unit (X58-4810-XX)Ref No. Part name DescriptionIC300 IC PLLQ300,301 Transistor Active filterQ302 Transistor Buffer amplifierQ350,351 FET VCO OSCQ355 Transistor Buffer amplifierD350~353 Varicap Frequency controlD354,355 Varicap ModulationDESCRIPTION OF COMPONENTS