Kenwood NX-740H Service Manual page 20

Pin Name I/O
No.
J1(MIC Jack)
1 MBL O
2 SB O
3 GND -
4 PTT I
5 ME -
6 MIC I
7 HOOK I
8 DM I/O MIC data detection
2.7.2 TX-RX unit (XC1-0010-XX)
Pin Name I/O
No.
1 SB O
2 SB O
3 SP- O
4 SP- O
5 SP+ O
6 SP+ O
7 LEDM O
8 MBL O
9 RLED O
10 GLED O
11 BLED O
12 KMO1 O
13 KMO2 O
14 KMO3 O
15 KMI1 I
16 KMI2 I
17 KMI3 I
18 5MS O
19 LEDI O
20 LECE O
21 LECL O
22 LELH O
23 LERE O
24 GND -
25 MIC I
26 ME -
27 HOOK/RXD I/O HOOK/PC serial data
28 PTT/TXD I/O PTT/PC serial data
29 MKEY I/O MIC data detection
30 POWER I
1-20 (No.RA010<Rev.001>)
Function
Backlight of Microphone
Battery voltage DC supply
Ground
PTT/ PC serial data from radio
MIC ground
MIC signal input
HOOK/ PC serial data to radio
Function
CN700
Battery voltage DC supply
Battery voltage DC supply
Speaker input -
Speaker input -
Speaker input +
Speaker input +
LED dimmer output
MIC backlight control signal
output
Red LED control signal ouput
Green LED control signal output
Blue LED control signal output
Key matrix output 1
Key matrix output 2
Key matrix output 3
Key matrix input 1
Key matrix input 2
Key matrix input 3
5V DC power supply
LED data output
LED enable output
LED clock output
LED latch output
LED reset output
Ground
MIC signal input
MIC ground
Detection input of power switch
Pin Name I/O
No.
J700 (D-SUB 15pin)
1 SB O
2 IGN I
3 SP2 O
4 DETO O
5 DATAI I
6 FNC1 I/O Programable I/O (programmed
7 FNC2 I/O Programable I/O (programmed
8 FNC3 I/O Programable I/O (programmed
9 FNC4 I/O Programable I/O (programmed
10 FNC5 I/O Programable I/O (programmed
11 FNC6 I/O Programable I/O (programmed
12 5MS O
13 HR1 O
14 HR2 O
15 GND -
2.7.3 Function Port Assignment
GPS (NMEA)
Name
FNC1 None
FNC2 GPS (NMEA Input)
FNC3 -
FNC4 -
FNC5 -
FNC6 -
FNC7 -
FNC8 -
Function
Battery voltage DC supply
DC 13.6V±15%,1.0A max
Ignition sens input,16.0V max
Speaker output
FM detector output, 500mVp-p
External transmit signal input
200±50mVp-p
by FPU) 1.0mA max.
by FPU) 1.0mA max.
by FPU) 1.0mA max.
by FPU) 1.0mA max.
by FPU) 1.0mA max.
by FPU) 1.0mA max.
5V DC power supply,
100mA max
Horn alert signal output,16.0V/
2.0A max.
Horn alert signal output,16.0V/
2.0A max.
Ground
I/O
O
I
-
-
-
-
-
-