Kenwood TKR-750 Service Manual

Also see for TKR-750: Brochure & specs Service manual Function reference Service manual Instruction manual

TKR-75020Pin No. Name I/O Function84 EMU1/OFF I/O Emulator 1 (to JTAG connector)85 TDO O Test data output (to JTAG connector)86 TDI I Test data input (to JTAG connector)87 TRST I Test reset (to JTAG connector)88 TCK I Test clock (to JTAG connector)89 TMS I Test mode select (to JTAG connector)90 NC14 – Not used (No connection)91 CVDD – VDD for core CPU (+1.8V)92 HPIENA I Not used (Pull up)93 Vss – GND94 CLKOUT O Not used (No connection)95 HD4 I/O HPI data bus96 X1 – 16.515MHz (System clock)97 X2/CLKIN – 16.515MHz (System clock)98 RS I DSP reset input99~104 D0~D5 – Not used (No connection)105 A6 O Not used (No connection)106 Vss – GND107~109 A7~A9 O Not used (No connection)110 NC15 – Not used (No connection)111 Vss – GND112 DVDD – VDD for I/O pins (+3.3V)113~119 D6~D12 – Not used (No connection)120 HD5 I/O HPI data bus121~123 D13~D15 – Not used (No connection)124 HD6 I/O HPI data bus125 CVDD – VDD for core CPU (+1.8V)126 NC16 – Not used (No connection)127 HDS1 I HPI data strobe 1 (Pull up)128 Vss – GND129 HDS2 I HPI data strobe 2 (Pull down)130 DVDD – VDD for I/O pins (+3.3V)131~134 A10~A13 O Not used (No connection)135 HD7 I/O HPI data bus136~141 A14~A19 O Not used (No connection)142 CVDD – VDD for core CPU (+1.8V)143,144 NC17,NC18 – Not used (No connection)Final Unit (X45-373X-XX)Ref. No. Part name DescriptionIC1 IC DC amplifierIC2 IC ThermostatIC3 IC Voltage reguatorQ2,3 Transistor RF amplifierQ4 FET TX drive amplifierQ5 FET Final amplifierQ8,9 Transistor DC switchD1 Diode Thermal senseD2 Zener diode Voltage referenceD4,5 Diode RF detectorD6 Diode Surge absorptionD7 Zener diode Surge protectorD8 Diode Reverse current protectorD9 Varistor Current protectorD51,52 Diode Reverse connection protectionD53,55,56 Diode RF switchDisplay Unit (X54-3330-21)Ref. No. Part name DescriptionIC501 MOS IC MIC amplifierIC502~505 IC Shift registerIC506,507 IC Voltage regulatorQ501,502 Transistor Level controllerQ503,504 FET DC switchQ506 Transistor DC switchQ507 FET DC switchQ508~511 Transistor DC switchQ512~514 FET DC switchQ516~519 FET DC switchQ521~525 FET DC switchD501,502 Diode AF detectorD503~505 LED LEDD506,507 LED 7 segmentD508~514 Diode Surge absorptionD601,602 Diode Surge absorptionD603 Varistor Current protectorTX-RX Unit (X57-695X-XX)Ref. No. Part name DescriptionIC1,2 IC Buffer amplifierIC3~5 IC Voltage regulatorIC6 IC D/A converterSEMICONDUCTOR DATA / COMPONENTS DESCRIPTION