Kenwood TM-271A Service Manual

Also see for TM-271A: Instruction manual Instruction manual Service manual

Contents

TM-271A/271E8SEMICONDUCTOR DATA■ Terminal FunctionPin No. Name I/O Function1 TONE O CTCSS/DCS/Clone output2 DTMF O DTMF/BEEP/1750Hz output3 PLLE O PLL IC chip select4,5 NC I6 GND - GND.7 CNVSS -8 EVLLD O9 BSHIFT O Beat shift10 RESET - Reset11 XOUT - X’tal (8MHz)12 VSS - GND13 XIN - X’tal (8MHz)14 VCC - +5V15 NMI - (Input only)16 NC I17 POWER I Power key input18 INT I μcom stop19 NC I20 TX/RX O TX/RX21 UL I PLL unlock detect22,23 NC I24 EEPSDT I/O EEPROM data25 EEPCK O EEPROM clock26 EEPWP O EEPROM write protect27,28 NC I (Nch open drain)29 SQC O Squelch signal output for TNC(TxD for flash)30 PKS I PTT input for TNC (RxD for flash)31 CLKFLS I (GND)32 BSYFLS O (Vcc)33 TXD O To PC34 RXD I From PC35 PTT I PTT input36~38 NC I39 EMPFLS I/O (GND)40~43 NC I44 CEFLS I/O (Vcc)45~49 NC I50 AFM O AF mute51 SPM O Speaker mute52 AMPSW O AF AMP switchPin No. Name I/O Function53 DT O Common data54 CK O Common clock55 NC I56 DST1 I Destination 157~59 DST2~DST4 I Destination 2~460 VCC - +5V61 NC I62 VSS - GND63 ADJ I For adjustment mode64 NARROW O Wide/Narrow 265 WIDE O Wide/Narow66,67 NC I68 LCDCL O Clock for LCD69 LCDCE O Chip enable for LCD70 LCDDO O Output data to LCD71 LCDDI I Input data from LCD72 NC I73 ENCB I Encoder input B74 ENCA I Encoder input A75 TNC9600 O TNC speed H : 9600, L : 120076 TNC1200 O TNC speed L : 9600, H : 120077 MICMT O MIC mute78 NC I NC79 8RC O 8R control80 8TC O 8T control81 NC I82 SBC O Battery switch83~85 NC I86 CM I/O MIC key check87 I For AMR DTMF keypad MIC88 I For AMR DTMF keypad MIC89 VOL I Volume encoder90 TEMP2 I Temperature 291 TEMP1 I Temperature 192 RSSI I RSSI input93 SQIN I Squelch input94 AVSS - GND95 DTMF IN I CTCSS/DCS/Clone/1050Hz input96 VREF - +5V97 AVCC - +5V98~100 NC IMicroprocessor : 30622MAA-B85GP (TX-RX Unit IC101)