Kenwood TKR-740 Service Manual

Also see for TKR-740: Brochure & specs Instruction manual Instruction manual Service manual

TKR-74065TERMINAL FUNCTIONTerminalNo.Terminalname Terminal function I/ OCN4TerminalNo.Terminalname Terminal function I/ OCN5TerminalNo.Terminalname Terminal function I/ OCN6TerminalNo.Terminalname Terminal function I/ OCN700TerminalNo.Terminalname Terminal function I/ OCN701CONTROL UNIT (X53-3882-71)1 SPM Speaker mute signal I2 AUX06 Auxiliary output 6 O3 RXG RX signal ground -4 AUX05 Auxiliary output 5 O5 RA RX audio (voice) O6 AUX04 Auxiliary output 4 O7 RD RX data (voice & data) O8 AUX03 Auxiliary output 3 O9 TA TX audio (voice) I10 AUX02 Auxiliary output 2 O11 TD TX data (data or signalling) I12 AUX01 Auxiliary output 1 O13 DG Control line ground -14 TXG TX signal ground -15 AUXI3 Auxiliary input 3 I16 NC No connection -17 AUXI2 Auxiliary input 2 I18 SC SQ control O19 AUXI1 Auxiliary input 1 I20 ExPTT External press-to-talk sw itch I21 TXD RS-232C output signal (for FPU) O22 ExM ON External monitor sw itch I23 RXD RS-232C input signal (for FPU) I24 NC No connection -25 NC No connection -26 NC No connection -27 NC No connection -28 NC No connection -29 NC No connection -30 NC No connection -1 B Pow er supply (Vcc) O2 FWD TX forw ard pow er detect signal O3 EXR External reference detect signal O4 CVT TX main PLL lock voltage signal O5 CVR RX main PLL lock voltage signal O6 RD RX data (data & voice) O7 RSSI RX signal strength indicator signal O8 SPO External Speaker AF O9 SPO External Speaker AF O10 SPI Intenal Speaker AF input I11 GND Ground -12 GND Ground -13 SPG External Speaker ground -14 SPG External Speaker ground -1 RRA Remote RX signal (voice) O2 RTA Remote TX signal (voice) I3 RPTT Remote Press-to-talk sw itch I4 ExM ON External monitor sw itch I5 GND Ground -6 I/O1 Programable I/O 1 I/O7 I/O2 Programable I/O 2 I/O8 I/O3 Programable I/O 3 I/O9 I/O4 Programable I/O 4 I/O10 I/O5 Programable I/O 5 I/O11 I/O6 Programable I/O 6 I/O12 I/O7 Programable I/O 7 I/O1 B Pow er supply (Vcc) I2 SW1 S705 output O3 SW2 S704 output O4 SW3 S703 output O5 SW4 S702 output O6 SW5 S701 output O7 SW6 S700 output O1 5A2 5V constant voltage A I2 5B2 5V constant voltage B I3 EN7 Enable signal for IC700, 701,702 I4 CK Common Clock for IC700, 701, 702 I5 DS Serial data for IC702 I6 GND Ground -