Terminal Function - Kenwood TK-780 Service Manual

TK-780
CN7 (TX-RX Unit) ← → CN502 (Control Unit)
Pin No. Name
1 W/N Wide/Narrow switch. H : Wide
2 T/R TX/RX switch. H : Receive
3 MO Modulation signal.
4 TO Low speed data signal.
5 BEEP Beep.
6 8R NC (8V)
7 PSW Power switch.
8 DEO Receive signal to control unit.
9 MM MIC mute. H : MIC mute
10 AFO Receive signal from control unit.
11 ME MIC ground.
12 MI External MIC.
13 AHK Hook signal. H : Off hook
14 IGN Ignition signal.
15 SB 13.2V.
16 SB 13.2V.
17 8C 8V.
18 KEY TX signal.
19 CK Shift register clock.
20 DT PLL/Shift register/DA converter data.
21 RSSI RSSI signal.
22 LD PLL unlock detection.
23 ES Shift register enable.
24 EP PLL enable signal.
25 EN DA converter enable signal.
26 APTT External PTT signal.
27 CP PLL clock.
28 DTC Data control signal.
29 TXD Serial data
30 RXD Serial data.
31 OE Serial data.
32 FSW Foot switch signal.
33 E Ground.
78

TERMINAL FUNCTION

CN101 (VCO) ← → TX-RX Unit
Function
CN501 (Control Unit)
J501 (Control Unit)
Pin No. Name
1 ST Switched transmit input. H : Transmit
2 HT RF output.
3 E Ground.
4 9CL 9V input.
5 8CL 8V input.
6 MD Modulation input.
7 CV Control voltage input.
Pin No. Name
1 E Ground.
2 5C Logic power (5V).
3 CS Chip selector signal. L : Option
4 CK Serial clock signal.
5 SID Serial data input.
6 (NC) Unused terminal.
7 (NC) Unused terminal.
8 LED(A) LED anode terminal.
9 LED(K) LED cathode terminal.
10 NC Unused terminal.
Pin No. Name
1 BLC MIC key backlight control.
2 PSB 13.2V.
3 E Ground.
4 PTT/TXD PTT.
5 ME MIC ground.
6 MIC MIC signal input.
7 HOOK/RXD Hook detection
8 CM MIC data detection.
Function
Function
Function