Kenwood TK-780 Service Manual

Also see for TK-780 series: Programming instructions Instruction manual Service manual supplement Service manual Instruction manual

31TK-780SEMICONDUCTOR DATA Terminal functionPin No. Name I/O Function1 LSDOUT O Low speed data output.2 HSDOUT O High speed data output.3 HSDIN I High speed data input.4 DTMSTD I DTMF decode IC data detect input.5 SELF I Self programming mode input.6 BYTE I +5V.7 CNVSS I GND.8 SFTOE O Shift register output enable.9 LCDCS O LCD driver chip select output.10 RESET I Microcomputer reset input.11 XOUT – 9.8304MHz (System clock).12 VSS – GND.13 XIN – 9.8304MHz (System clock).14 VCC – +5V.15 IGN I Ignition input.16 AFTRD I FFSK modulation data output timingpulse input.17 AFRTM I FFSK demodulation data input tim-ing pulse input.18 MICDAT O MIC key data output.19 CP O PLL IC clock output.20 BEEP O Beep data output.21 AFRDT I FFSK demodulation data input.22 AFREG1 O AF IC register switching data output 1.23 AFREG2 O AF IC register switching data output 2.24 EEPDAT O EEPROM data output.25 EN O D/A converter IC data strobe output.26 AFCLR O FFSK flame reset output.27 RXCOM2 I External hook input / External serialinterface input.28 TXCOM2 I/O External PTT input / External serialinterface output.29 TXCOM1 O External serial interface output.30 RXCOM1 I External serial interface input.31 LD I PLL unlock detect input.32 AFMSKE O FFSK modulation enable.(Enable active "H")33 TXD O Serial interface output.34 HOOK I Hook input / Serial interface input.35 AFDAT O FFSK data output.36 RFCLK O Common clock output. (TX-RX unit)37 RDY – Not used.38 ALE – Not used.39 HOLD – Not used.40 HLDA – Not used.41 BLCK – Not used.42 RD – Flash memory RD bus.43 BHE – Not used.44 WR – Flash memory WR bus.45 DTMCLK O DTMF decode IC clock output.46 CNTCLK O Common clock output. (Control unit)Microprocessor : 30620M8-394GP (TX-RX Unit IC511)Pin No. Name I/O Function47 EP O PLL IC data strobe output.48 CSO O Flash memory chip enable.49 A19 – Not used.50~59 A18~A9 – Flash memory address bus.60 VCC – +5V.61 A8 – Flash memory address bus.62 VSS – GND.63~70 A7~A0 – Flash memory address bus.71~74 KEY1~KEY4 I/O Key matrix data input/output 1~4.75 MINDAT O Common data output.76~78 KEY5~KEY7 I Key matrix data input 5~7.79~86 D7~D0 – Flash memory data bus.87 DTMDAT I DTMF decode IC data input.88 AUXDTC I External DTC input.89 MICBLC O MIC back light control output.90 POWSW I Power switch input.91 ANLSQL I Squelch level input.92 PTT I PTT switch input.93 RSSI I Received signal strength indicatorinput.94 AVSS – GND.95 LSDIN I Low speed data input.96 VREF – +5V.97 AVCC – +5V.98 ES1 O Shift register data strobe output.(Control unit)99 ES2 O Shift register data strobe output.(TX-RX unit)100 AFSTB O AF IC data strobe output.Shift Register : BU4094BCFV Terminal function (TX-RX unit IC508)Pin No. Port Name Function1 ES ES1 Strobe2 DT DAT Data3 CK Clock4 Q1 LEDR Red LED. H : ON, L : OFF5 Q2 LEDG Green LED. H : ON, L : OFF6 Q3 KEYBLT Key back light. H : ON, L : OFF7 Q4 MMUTE MIC mute. H: Mute, L : Unmute8 VSS GND9 NC10 NC11 Q8 PA2 Public address control 2. H : ON, L : OFF12 Q7 BSHIFT Beat shift. H : ON, L : OFF13 Q6 KEY TX power switching. H : TX, L : RX14 Q5 T/R TX/RX switching. H : RX, L : TX15 OE Output enable16 VDC +5V