Kenwood TK-3401D Service Manual page 14

2.6 TERMINAL FUNCTION
2.6.1 TX-RX unit (XC1-0072-70)
Pin No. Name
1 VOLOUT
2 VOLIN
3 SB
4 SB
5 B
6 B
7 VOLGND
8 EN2
9 EN4
10 GND
11 EN3
12 EN1
2.6.2 SP/MIC Connector Specification
Pin No. Name
1 PTT/RXD
2 MICIN
3 MICO
4 OPTDET
5 50V
6 AE
7 TXD
8 NC
9 NC
10 SPO
1-14 (No.RA012<Rev.001>)
I/O Function
CN600
O Volume output to audio amplifier
I Volume level input for audio control
I Power input after power switch
I Connect to pin 3
O Power output after passing through the fuse
O Connect to pin 5
- GND for volume level
I Rotary switch input
I Rotary switch input
- GND
I Rotary switch input
I Rotary switch input
I/O Signal Type
I Digital PTT/RXD input
I Analog External MIC input
O Analog Internal MIC output
I Digital External option detection
O Power DC 5V output
- GND GND
O Digital TXD output
- - No connection
- - No connection
O Analog External audio output
Function